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esp32-ds18b20-ledc
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  1. 21
      LICENSE
  2. 9
      Makefile
  3. 60
      README.md
  4. 3
      doc/.gitignore
  5. 2474
      doc/Doxyfile
  6. 4
      doc/getting_started.md
  7. 5
      main/component.mk
  8. 470
      main/ds18b20.c
  9. 181
      main/ds18b20.h
  10. 179
      main/ds18b20_main.c
  11. 587
      main/owb.c
  12. 238
      main/owb.h
  13. 280
      sdkconfig

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LICENSE
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MIT License
Copyright (c) 2017 David Antliff
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

9
Makefile
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#
# This is a project Makefile. It is assumed the directory this Makefile resides in is a
# project subdirectory.
#
PROJECT_NAME := ds18b20
include $(IDF_PATH)/make/project.mk

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# ESP32-DS18B20
## Introduction
This is a ESP32-compatible C library for the Maxim Integrated DS18B20 Programmable Resolution 1-Wire Digital Thermometer device.
It supports multiple devices on the same 1-Wire bus.
It is written and tested for the [ESP-IDF](https://github.com/espressif/esp-idf) environment, using the xtensa-esp32-elf toolchain (gcc version 5.2.0).
## Features
This library includes:
* External power supply mode (parasitic mode not yet supported).
* Static (stack-based) or dynamic (malloc-based) memory model.
* No globals - support any number of 1-Wire buses simultaneously.
* 1-Wire device detection and validation, including search for multiple devices on a single bus.
* Addressing optimisation for a single (solo) device on a bus.
* 1-Wire bus operations including multi-byte read and write operations.
* CRC checks on ROM code and temperature data.
* Programmable temperature measurement resolution (9, 10, 11 or 12-bit resolution).
* Temperature conversion and retrieval.
* Separation of conversion and temperature retrieval to allow for simultaneous conversion across multiple devices.
## Documentation
Automatically generated API documentation (doxygen) is available [here](https://davidantliff.github.io/ESP32-DS18B20/index.html).
## Source Code
The source is available from [GitHub](https://www.github.com/DavidAntliff/ESP32-DS18B20).
## License
The code in this project is licensed under the MIT license - see LICENSE for details.
## Links
* [DS18B20 Datasheet](http://datasheets.maximintegrated.com/en/ds/DS18B20.pdf)
* [1-Wire Communication Through Software](https://www.maximintegrated.com/en/app-notes/index.mvp/id/126)
* [1-Wire Search Algorithm](https://www.maximintegrated.com/en/app-notes/index.mvp/id/187)
* [Espressif IoT Development Framework for ESP32](https://github.com/espressif/esp-idf)
## Acknowledgements
Parts of this code are based on references provided to the public domain by Maxim Integrated.
"1-Wire" is a registered trademark of Maxim Integrated.
## Roadmap
The following features are anticipated but not yet implemented:
* Documented examples.
* Concurrency support (multiple tasks accessing devices on the same bus).
* Alarm support.
* EEPROM support.
* Parasitic power support.
* FreeRTOS event-based example.

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# Getting Started
TODO...

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main/component.mk
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#
# "main" pseudo-component makefile.
#
# (Uses default behaviour of compiling all source files in directory, adding 'include' to include path.)

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/*
* MIT License
*
* Copyright (c) 2017 David Antliff
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
/**
* @file ds18b20.c
*
* Resolution is cached in the DS18B20_Info object to avoid querying the hardware
* every time a temperature conversion is required. However this can result in the
* cached value becoming inconsistent with the hardware value, so care must be taken.
*
*/
#include <stddef.h>
#include <string.h>
#include <stdlib.h>
#include <stdbool.h>
#include <stdint.h>
#include <math.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "driver/gpio.h"
#include "esp_system.h"
#include "esp_log.h"
#include "sdkconfig.h"
#include "ds18b20.h"
#include "owb.h"
static const char * TAG = "ds18b20";
static const int T_CONV = 750; // maximum conversion time at 12-bit resolution in milliseconds
// Function commands
#define DS18B20_FUNCTION_TEMP_CONVERT 0x44
#define DS18B20_FUNCTION_SCRATCHPAD_WRITE 0x4E
#define DS18B20_FUNCTION_SCRATCHPAD_READ 0xBE
#define DS18B20_FUNCTION_SCRATCHPAD_COPY 0x48
#define DS18B20_FUNCTION_EEPROM_RECALL 0xB8
#define DS18B20_FUNCTION_POWER_SUPPLY_READ 0xB4
/// @cond ignore
typedef struct
{
uint8_t temperature[2]; // [0] is LSB, [1] is MSB
uint8_t trigger_high;
uint8_t trigger_low;
uint8_t configuration;
uint8_t reserved[3];
uint8_t crc;
} Scratchpad;
/// @endcond ignore
static void _init(DS18B20_Info * ds18b20_info, OneWireBus * bus)
{
if (ds18b20_info != NULL)
{
ds18b20_info->bus = bus;
memset(&ds18b20_info->rom_code, 0, sizeof(ds18b20_info->rom_code));
ds18b20_info->use_crc = false;
ds18b20_info->resolution = DS18B20_RESOLUTION_INVALID;
ds18b20_info->solo = false; // assume multiple devices unless told otherwise
ds18b20_info->init = true;
}
else
{
ESP_LOGE(TAG, "ds18b20_info is NULL");
}
}
static bool _is_init(const DS18B20_Info * ds18b20_info)
{
bool ok = false;
if (ds18b20_info != NULL)
{
if (ds18b20_info->init)
{
// OK
ok = true;
}
else
{
ESP_LOGE(TAG, "ds18b20_info is not initialised");
}
}
else
{
ESP_LOGE(TAG, "ds18b20_info is NULL");
}
return ok;
}
static bool _address_device(const DS18B20_Info * ds18b20_info)
{
bool present = false;
if (_is_init(ds18b20_info))
{
present = owb_reset(ds18b20_info->bus);
if (present)
{
if (ds18b20_info->solo)
{
// if there's only one device on the bus, we can skip
// sending the ROM code and instruct it directly
owb_write_byte(ds18b20_info->bus, OWB_ROM_SKIP);
}
else
{
// if there are multiple devices on the bus, a Match ROM command
// must be issued to address a specific slave
owb_write_byte(ds18b20_info->bus, OWB_ROM_MATCH);
owb_write_rom_code(ds18b20_info->bus, ds18b20_info->rom_code);
}
}
else
{
ESP_LOGE(TAG, "ds18b20 device not responding");
}
}
return present;
}
static bool _check_resolution(DS18B20_RESOLUTION resolution)
{
return (resolution >= DS18B20_RESOLUTION_9_BIT) && (resolution <= DS18B20_RESOLUTION_12_BIT);
}
static float _wait_for_conversion(DS18B20_RESOLUTION resolution)
{
float elapsed_time = 0.0f;
if (_check_resolution(resolution))
{
int divisor = 1 << (DS18B20_RESOLUTION_12_BIT - resolution);
ESP_LOGD(TAG, "divisor %d", divisor);
float max_conversion_time = (float)T_CONV / (float)divisor;
int ticks = ceil(max_conversion_time / portTICK_PERIOD_MS);
ESP_LOGD(TAG, "wait for conversion: %.3f ms, %d ticks", max_conversion_time, ticks);
// wait at least this maximum conversion time
vTaskDelay(ticks);
// TODO: measure elapsed time more accurately
elapsed_time = ticks * portTICK_PERIOD_MS;
}
return elapsed_time;
}
static float _decode_temp(uint8_t lsb, uint8_t msb, DS18B20_RESOLUTION resolution)
{
float result = 0.0f;
if (_check_resolution(resolution))
{
// masks to remove undefined bits from result
static const uint8_t lsb_mask[4] = { ~0x03, ~0x02, ~0x01, ~0x00 };
uint8_t lsb_masked = lsb_mask[resolution - DS18B20_RESOLUTION_9_BIT] & lsb;
int16_t raw = (msb << 8) | lsb_masked;
result = raw / 16.0f;
}
else
{
ESP_LOGE(TAG, "Unsupported resolution %d", resolution);
}
return result;
}
static size_t _min(size_t x, size_t y)
{
return x > y ? y : x;
}
static Scratchpad _read_scratchpad(const DS18B20_Info * ds18b20_info, size_t count)
{
count = _min(sizeof(Scratchpad), count); // avoid overflow
Scratchpad scratchpad = {0};
ESP_LOGD(TAG, "scratchpad read %d bytes: ", count);
if (_address_device(ds18b20_info))
{
owb_write_byte(ds18b20_info->bus, DS18B20_FUNCTION_SCRATCHPAD_READ);
owb_read_bytes(ds18b20_info->bus, (uint8_t *)&scratchpad, count);
esp_log_buffer_hex(TAG, &scratchpad, count);
}
return scratchpad;
}
static bool _write_scratchpad(const DS18B20_Info * ds18b20_info, const Scratchpad * scratchpad, bool verify)
{
bool result = false;
// Only bytes 2, 3 and 4 (trigger and configuration) can be written.
// All three bytes MUST be written before the next reset to avoid corruption.
if (_is_init(ds18b20_info))
{
if (_address_device(ds18b20_info))
{
owb_write_byte(ds18b20_info->bus, DS18B20_FUNCTION_SCRATCHPAD_WRITE);
owb_write_bytes(ds18b20_info->bus, (uint8_t *)&scratchpad->trigger_high, 3);
ESP_LOGD(TAG, "scratchpad write 3 bytes:");
esp_log_buffer_hex(TAG, &scratchpad->trigger_high, 3);
result = true;
if (verify)
{
Scratchpad read = _read_scratchpad(ds18b20_info, offsetof(Scratchpad, configuration) + 1);
if (memcmp(&scratchpad->trigger_high, &read.trigger_high, 3) != 0)
{
ESP_LOGE(TAG, "scratchpad verify failed: "
"wrote {0x%02x, 0x%02x, 0x%02x}, "
"read {0x%02x, 0x%02x, 0x%02x}",
scratchpad->trigger_high, scratchpad->trigger_low, scratchpad->configuration,
read.trigger_high, read.trigger_low, read.configuration);
result = false;
}
}
}
}
return result;
}
// Public API
DS18B20_Info * ds18b20_malloc(void)
{
DS18B20_Info * ds18b20_info = malloc(sizeof(*ds18b20_info));
if (ds18b20_info != NULL)
{
memset(ds18b20_info, 0, sizeof(*ds18b20_info));
ESP_LOGD(TAG, "malloc %p", ds18b20_info);
}
else
{
ESP_LOGE(TAG, "malloc failed");
}
return ds18b20_info;
}
void ds18b20_free(DS18B20_Info ** ds18b20_info)
{
if (ds18b20_info != NULL && (*ds18b20_info != NULL))
{
ESP_LOGD(TAG, "free %p", *ds18b20_info);
free(*ds18b20_info);
*ds18b20_info = NULL;
}
}
void ds18b20_init(DS18B20_Info * ds18b20_info, OneWireBus * bus, OneWireBus_ROMCode rom_code)
{
if (ds18b20_info != NULL)
{
_init(ds18b20_info, bus);
ds18b20_info->rom_code = rom_code;
// read current resolution from device as it may not be power-on or factory default
ds18b20_info->resolution = ds18b20_read_resolution(ds18b20_info);
}
else
{
ESP_LOGE(TAG, "ds18b20_info is NULL");
}
}
void ds18b20_init_solo(DS18B20_Info * ds18b20_info, OneWireBus * bus)
{
if (ds18b20_info != NULL)
{
_init(ds18b20_info, bus);
ds18b20_info->solo = true;
// read current resolution from device as it may not be power-on or factory default
ds18b20_info->resolution = ds18b20_read_resolution(ds18b20_info);
}
else
{
ESP_LOGE(TAG, "ds18b20_info is NULL");
}
}
void ds18b20_use_crc(DS18B20_Info * ds18b20_info, bool use_crc)
{
if (_is_init(ds18b20_info))
{
ds18b20_info->use_crc = use_crc;
ESP_LOGD(TAG, "use_crc %d", ds18b20_info->use_crc);
}
}
bool ds18b20_set_resolution(DS18B20_Info * ds18b20_info, DS18B20_RESOLUTION resolution)
{
bool result = false;
if (_is_init(ds18b20_info))
{
if (_check_resolution(ds18b20_info->resolution))
{
// read scratchpad up to and including configuration register
Scratchpad scratchpad = _read_scratchpad(ds18b20_info,
offsetof(Scratchpad, configuration) - offsetof(Scratchpad, temperature) + 1);
// modify configuration register to set resolution
uint8_t value = (((resolution - 1) & 0x03) << 5) | 0x1f;
scratchpad.configuration = value;
ESP_LOGD(TAG, "configuration value 0x%02x", value);
// write bytes 2, 3 and 4 of scratchpad
result = _write_scratchpad(ds18b20_info, &scratchpad, /* verify */ true);
if (result)
{
ds18b20_info->resolution = resolution;
ESP_LOGI(TAG, "Resolution set to %d bits", (int)resolution);
}
else
{
// Resolution change failed - update the info resolution with the value read from configuration
ds18b20_info->resolution = ds18b20_read_resolution(ds18b20_info);
ESP_LOGW(TAG, "Resolution consistency lost - refreshed from device: %d", ds18b20_info->resolution);
}
}
else
{
ESP_LOGE(TAG, "Unsupported resolution %d", resolution);
}
}
return result;
}
DS18B20_RESOLUTION ds18b20_read_resolution(DS18B20_Info * ds18b20_info)
{
DS18B20_RESOLUTION resolution = DS18B20_RESOLUTION_INVALID;
if (_is_init(ds18b20_info))
{
// read scratchpad up to and including configuration register
Scratchpad scratchpad = _read_scratchpad(ds18b20_info,
offsetof(Scratchpad, configuration) - offsetof(Scratchpad, temperature) + 1);
resolution = ((scratchpad.configuration >> 5) & 0x03) + DS18B20_RESOLUTION_9_BIT;
if (!_check_resolution(resolution))
{
ESP_LOGE(TAG, "invalid resolution read from device: 0x%02x", scratchpad.configuration);
resolution = DS18B20_RESOLUTION_INVALID;
}
else
{
ESP_LOGI(TAG, "Resolution read as %d", resolution);
}
}
return resolution;
}
bool ds18b20_convert(const DS18B20_Info * ds18b20_info)
{
bool result = false;
if (_is_init(ds18b20_info))
{
OneWireBus * bus = ds18b20_info->bus;
if (_address_device(ds18b20_info))
{
// initiate a temperature measurement
owb_write_byte(bus, DS18B20_FUNCTION_TEMP_CONVERT);
result = true;
}
else
{
ESP_LOGE(TAG, "ds18b20 device not responding");
}
}
return result;
}
void ds18b20_convert_all(const OneWireBus * bus)
{
owb_reset(bus);
owb_write_byte(bus, OWB_ROM_SKIP);
owb_write_byte(bus, DS18B20_FUNCTION_TEMP_CONVERT);
}
float ds18b20_wait_for_conversion(const DS18B20_Info * ds18b20_info)
{
float elapsed_time = 0.0f;
if (_is_init(ds18b20_info))
{
elapsed_time = _wait_for_conversion(ds18b20_info->resolution);
}
return elapsed_time;
}
float ds18b20_read_temp(const DS18B20_Info * ds18b20_info)
{
float temp = 0.0f;
if (_is_init(ds18b20_info))
{
OneWireBus * bus = ds18b20_info->bus;
if (_address_device(ds18b20_info))
{
// read measurement
_address_device(ds18b20_info);
owb_write_byte(bus, DS18B20_FUNCTION_SCRATCHPAD_READ);
uint8_t temp_LSB = 0;
uint8_t temp_MSB = 0;
if (!ds18b20_info->use_crc)
{
// Without CRC:
temp_LSB = owb_read_byte(bus);
temp_MSB = owb_read_byte(bus);
owb_reset(bus); // terminate early
}
else
{
// with CRC:
uint8_t buffer[9];
owb_read_bytes(bus, buffer, 9);
temp_LSB = buffer[0];
temp_MSB = buffer[1];
if (owb_crc8_bytes(0, buffer, 9) != 0)
{
ESP_LOGE(TAG, "CRC failed");
temp_LSB = temp_MSB = 0;
}
}
ESP_LOGD(TAG, "temp_LSB 0x%02x, temp_MSB 0x%02x", temp_LSB, temp_MSB);
temp = _decode_temp(temp_LSB, temp_MSB, ds18b20_info->resolution);
}
else
{
ESP_LOGE(TAG, "ds18b20 device not responding");
}
}
return temp;
}
float ds18b20_convert_and_read_temp(const DS18B20_Info * ds18b20_info)
{
float temp = 0.0f;
if (_is_init(ds18b20_info))
{
if (ds18b20_convert(ds18b20_info))
{
// wait at least maximum conversion time
_wait_for_conversion(ds18b20_info->resolution);
temp = ds18b20_read_temp(ds18b20_info);
}
}
return temp;
}

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/*
* MIT License
*
* Copyright (c) 2017 David Antliff
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
/**
* @file ds18b20.h
* @brief Interface definitions for the Maxim Integrated DS18B20 Programmable
* Resolution 1-Wire Digital Thermometer device.
*
* This component provides structures and functions that are useful for communicating
* with DS18B20 devices connected via a Maxim Integrated 1-Wire® bus.
*/
#ifndef DS18B20_H
#define DS18B20_H
#include "owb.h"
#ifdef __cplusplus
extern "C" {
#endif
/**
* @brief Symbols for the supported temperature resolution of the device.
*/
typedef enum
{
DS18B20_RESOLUTION_INVALID = -1, ///< Invalid resolution
DS18B20_RESOLUTION_9_BIT = 9, ///< 9-bit resolution, LSB bits 2,1,0 undefined
DS18B20_RESOLUTION_10_BIT = 10, ///< 10-bit resolution, LSB bits 1,0 undefined
DS18B20_RESOLUTION_11_BIT = 11, ///< 11-bit resolution, LSB bit 0 undefined
DS18B20_RESOLUTION_12_BIT = 12, ///< 12-bit resolution (default)
} DS18B20_RESOLUTION;
/**
* @brief Structure containing information related to a single DS18B20 device connected
* via a 1-Wire bus.
*/
typedef struct
{
bool init; ///< True if struct has been initialised, otherwise false
bool solo; ///< True if device is intended to be the only one connected to the bus, otherwise false
bool use_crc; ///< True if CRC checks are to be used when retrieving information from a device on the bus
OneWireBus * bus; ///< Pointer to 1-Wire bus information relevant to this device
OneWireBus_ROMCode rom_code; ///< The ROM code used to address this device on the bus
DS18B20_RESOLUTION resolution; ///< Temperature measurement resolution per reading
} DS18B20_Info;
/**
* @brief Construct a new device info instance.
* New instance should be initialised before calling other functions.
* @return Pointer to new device info instance, or NULL if it cannot be created.
*/
DS18B20_Info * ds18b20_malloc(void);
/**
* @brief Delete an existing device info instance.
* @param[in] ds18b20_info Pointer to device info instance.
* @param[in,out] ds18b20_info Pointer to device info instance that will be freed and set to NULL.
*/
void ds18b20_free(DS18B20_Info ** ds18b20_info);
/**
* @brief Initialise a device info instance with the specified GPIO.
* @param[in] ds18b20_info Pointer to device info instance.
* @param[in] bus Pointer to initialised 1-Wire bus instance.
* @param[in] rom_code Device-specific ROM code to identify a device on the bus.
*/
void ds18b20_init(DS18B20_Info * ds18b20_info, OneWireBus * bus, OneWireBus_ROMCode rom_code);
/**
* @brief Initialise a device info instance with the specified GPIO as a solo device on the bus.
*
* This is subject to the requirement that this device is the ONLY device on the bus.
* This allows for faster commands to be used without ROM code addressing.
*
* NOTE: if additional devices are added to the bus, operation will cease to work correctly.
*
* @param[in] ds18b20_info Pointer to device info instance.
* @param[in] bus Pointer to initialised 1-Wire bus instance.
* @param[in] rom_code Device-specific ROM code to identify a device on the bus.
*/
void ds18b20_init_solo(DS18B20_Info * ds18b20_info, OneWireBus * bus);
/**
* @brief Enable or disable use of CRC checks on device communications.
* @param[in] ds18b20_info Pointer to device info instance.
* @param[in] use_crc True to enable CRC checks, false to disable.
*/
void ds18b20_use_crc(DS18B20_Info * ds18b20_info, bool use_crc);
/**
* @brief Set temperature measurement resolution.
*
* This programs the hardware to the specified resolution and sets the cached value to be the same.
* If the program fails, the value currently in hardware is used to refresh the cache.
*
* @param[in] ds18b20_info Pointer to device info instance.
* @param[in] resolution Selected resolution.
* @return True if successful, otherwise false.
*/
bool ds18b20_set_resolution(DS18B20_Info * ds18b20_info, DS18B20_RESOLUTION resolution);
/**
* @brief Update and return the current temperature measurement resolution from the device.
* @param[in] ds18b20_info Pointer to device info instance.
* @return The currently configured temperature measurement resolution.
*/
DS18B20_RESOLUTION ds18b20_read_resolution(DS18B20_Info * ds18b20_info);
/**
* @brief Read 64-bit ROM code from device - only works when there is a single device on the bus.
* @param[in] ds18b20_info Pointer to device info instance.
* @return The 64-bit value read from the device's ROM.
*/
OneWireBus_ROMCode ds18b20_read_rom(DS18B20_Info * ds18b20_info);
/**
* @brief Start a temperature measurement conversion on a single device.
* @param[in] ds18b20_info Pointer to device info instance.
*/
bool ds18b20_convert(const DS18B20_Info * ds18b20_info);
/**
* @brief Start temperature conversion on all connected devices.
*
* This should be followed by a sufficient delay to ensure all devices complete
* their conversion before the measurements are read.
* @param[in] bus Pointer to initialised bus instance.
*/
void ds18b20_convert_all(const OneWireBus * bus);
/**
* @brief Wait for the maximum conversion time according to the current resolution of the device.
* @param[in] bus Pointer to initialised bus instance.
* @return An estimate of the time elapsed, in milliseconds. Actual elapsed time may be greater.
*/
float ds18b20_wait_for_conversion(const DS18B20_Info * ds18b20_info);
/**
* @brief Read last temperature measurement from device.
*
* This is typically called after ds18b20_start_mass_conversion(), provided enough time
* has elapsed to ensure that all devices have completed their conversions.
* @param[in] ds18b20_info Pointer to device info instance. Must be initialised first.
* @return The measurement value returned by the device, in degrees Celsius.
*/
float ds18b20_read_temp(const DS18B20_Info * ds18b20_info);
/**
* @brief Convert, wait and read current temperature from device.
* @param[in] ds18b20_info Pointer to device info instance. Must be initialised first.
* @return The measurement value returned by the device, in degrees Celsius.
*/
float ds18b20_convert_and_read_temp(const DS18B20_Info * ds18b20_info);
#ifdef __cplusplus
}
#endif
#endif // DS18B20_H

179
main/ds18b20_main.c
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@ -1,179 +0,0 @@
/*
* MIT License
*
* Copyright (c) 2017 David Antliff
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <inttypes.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "esp_system.h"
#include "esp_log.h"
// Uncomment to enable static (stack-based) allocation of instances and avoid malloc/free.
//#define USE_STATIC 1
#include "owb.h"
#include "ds18b20.h"
#define GPIO_DS18B20_0 (GPIO_NUM_5)
#define MAX_DEVICES (8)
#define DS18B20_RESOLUTION (DS18B20_RESOLUTION_11_BIT)
void app_main()
{
esp_log_level_set("*", ESP_LOG_INFO);
// Create a 1-Wire bus
#ifdef USE_STATIC
OneWireBus owb_static; // static allocation
OneWireBus * owb = &owb_static;
#else
OneWireBus * owb = owb_malloc(); // heap allocation
#endif
owb_init(owb, GPIO_DS18B20_0);
owb_use_crc(owb, true); // enable CRC check for ROM code
// find all connected devices
printf("Find devices:\n");
OneWireBus_ROMCode device_rom_codes[MAX_DEVICES] = {0};
int num_devices = 0;
OneWireBus_SearchState search_state = {0};
bool found = owb_search_first(owb, &search_state);
while (found)
{
char rom_code_s[17];
owb_string_from_rom_code(search_state.rom_code, rom_code_s, sizeof(rom_code_s));
printf(" %d : %s\n", num_devices, rom_code_s);
device_rom_codes[num_devices] = search_state.rom_code;
++num_devices;
found = owb_search_next(owb, &search_state);
}
//uint64_t rom_code = 0x0001162e87ccee28; // pink
//uint64_t rom_code = 0xf402162c6149ee28; // green
//uint64_t rom_code = 0x1502162ca5b2ee28; // orange
//uint64_t rom_code = owb_read_rom(owb);
// known ROM codes (LSB first):
OneWireBus_ROMCode known_device = {
.fields.family = { 0x28 },
.fields.serial_number = { 0xee, 0xcc, 0x87, 0x2e, 0x16, 0x01 },
.fields.crc = { 0x00 },
};
char rom_code_s[17];
owb_string_from_rom_code(known_device, rom_code_s, sizeof(rom_code_s));
printf("Device %s is %s\n", rom_code_s, owb_verify_rom(owb, known_device) ? "present" : "not present");
// Create a DS18B20 device on the 1-Wire bus
#ifdef USE_STATIC
DS18B20_Info devices_static[MAX_DEVICES] = {0};
DS18B20_Info * devices[MAX_DEVICES] = {0};
for (int i = 0; i < MAX_DEVICES; ++i)
{
devices[i] = &(devices_static[i]);
}
#else
DS18B20_Info * devices[MAX_DEVICES] = {0};
#endif
for (int i = 0; i < num_devices; ++i)
{
#ifdef USE_STATIC
DS18B20_Info * ds18b20_info = devices[i];
#else
DS18B20_Info * ds18b20_info = ds18b20_malloc(); // heap allocation
devices[i] = ds18b20_info;
#endif
if (num_devices == 1)
{
printf("Single device optimisations enabled\n");
ds18b20_init_solo(ds18b20_info, owb); // only one device on bus
}
else
{
ds18b20_init(ds18b20_info, owb, device_rom_codes[i]); // associate with bus and device
}
ds18b20_use_crc(ds18b20_info, true); // enable CRC check for temperature readings
ds18b20_set_resolution(ds18b20_info, DS18B20_RESOLUTION);
}
// // read temperatures from all sensors sequentially
// while (1)
// {
// printf("\nTemperature readings (degrees C):\n");
// for (int i = 0; i < num_devices; ++i)
// {
// float temp = ds18b20_get_temp(devices[i]);
// printf(" %d: %.3f\n", i, temp);
// }
// vTaskDelay(1000 / portTICK_PERIOD_MS);
// }
// read temperatures more efficiently by starting conversions on all devices at the same time
if (num_devices > 0)
{
while (1)
{
TickType_t start_ticks = xTaskGetTickCount();
ds18b20_convert_all(owb);
// in this application all devices use the same resolution,
// so use the first device to determine the delay
ds18b20_wait_for_conversion(devices[0]);
// read the results immediately after conversion otherwise it may fail
// (using printf before reading may take too long)
float temps[MAX_DEVICES] = { 0 };
for (int i = 0; i < num_devices; ++i)
{
temps[i] = ds18b20_read_temp(devices[i]);
}
// print results in a separate loop, after all have been read
printf("\nTemperature readings (degrees C):\n");
for (int i = 0; i < num_devices; ++i)
{
printf(" %d: %.1f\n", i, temps[i]);
}
// make up delay to approximately 1 second per measurement
vTaskDelay(1000 / portTICK_PERIOD_MS - (xTaskGetTickCount() - start_ticks));
}
}
#ifndef USE_STATIC
// clean up dynamically allocated data
for (int i = 0; i < num_devices; ++i)
{
ds18b20_free(&devices[i]);
}
owb_free(&owb);
#endif
printf("Restarting now.\n");
fflush(stdout);
esp_restart();
}

587
main/owb.c
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@ -1,587 +0,0 @@
/*
* MIT License
*
* Copyright (c) 2017 David Antliff
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
/**
* @file owb.c
*/
#include <stddef.h>
#include <stdbool.h>
#include <inttypes.h>
#include <string.h>
#include <stdlib.h>
#include "esp_log.h"
#include "sdkconfig.h"
#include "driver/gpio.h"
#include "owb.h"
static const char * TAG = "owb";
/// @cond ignore
struct _OneWireBus_Timing
{
uint32_t A, B, C, D, E, F, G, H, I, J;
};
//// @endcond
// 1-Wire timing delays (standard) in microseconds.
// Labels and values are from https://www.maximintegrated.com/en/app-notes/index.mvp/id/126
static const struct _OneWireBus_Timing _StandardTiming = {
6, // A - read/write "1" master pull DQ low duration
64, // B - write "0" master pull DQ low duration
60, // C - write "1" master pull DQ high duration
10, // D - write "0" master pull DQ high duration
9, // E - read master pull DQ high duration
55, // F - complete read timeslot + 10ms recovery
0, // G - wait before reset
480, // H - master pull DQ low duration
70, // I - master pull DQ high duration
410, // J - complete presence timeslot + recovery
};
static void _us_delay(uint32_t time_us)
{
ets_delay_us(time_us);
}
bool _is_init(const OneWireBus * bus)
{
bool ok = false;
if (bus != NULL)
{
if (bus->init)
{
// OK
ok = true;
}
else
{
ESP_LOGE(TAG, "bus is not initialised");
}
}
else
{
ESP_LOGE(TAG, "bus is NULL");
}
return ok;
}
/**
* @brief Generate a 1-Wire reset (initialization).
* @param[in] bus Initialised bus instance.
* @return true if device is present, otherwise false.
*/
static bool _reset(const OneWireBus * bus)
{
bool present = false;
if (_is_init(bus))
{
gpio_set_direction(bus->gpio, GPIO_MODE_OUTPUT);
_us_delay(bus->timing->G);
gpio_set_level(bus->gpio, 0); // Drive DQ low
_us_delay(bus->timing->H);
gpio_set_level(bus->gpio, 1); // Release the bus
_us_delay(bus->timing->I);
gpio_set_direction(bus->gpio, GPIO_MODE_INPUT);
int level1 = gpio_get_level(bus->gpio);
_us_delay(bus->timing->J); // Complete the reset sequence recovery
int level2 = gpio_get_level(bus->gpio);
present = (level1 == 0) && (level2 == 1); // Sample for presence pulse from slave
ESP_LOGD(TAG, "reset: level1 0x%x, level2 0x%x, present %d", level1, level2, present);
}
return present;
}
/**
* @brief Send a 1-Wire write bit, with recovery time.
* @param[in] bus Initialised bus instance.
* @param[in] bit The value to send.
*/
static void _write_bit(const OneWireBus * bus, int bit)
{
if (_is_init(bus))
{
int delay1 = bit ? bus->timing->A : bus->timing->C;
int delay2 = bit ? bus->timing->B : bus->timing->D;
gpio_set_direction(bus->gpio, GPIO_MODE_OUTPUT);
gpio_set_level(bus->gpio, 0); // Drive DQ low
_us_delay(delay1);
gpio_set_level(bus->gpio, 1); // Release the bus
_us_delay(delay2);
}
}
/**
* @brief Read a bit from the 1-Wire bus and return the value, with recovery time.
* @param[in] bus Initialised bus instance.
*/
static int _read_bit(const OneWireBus * bus)
{
int result = 0;
if (_is_init(bus))
{
gpio_set_direction(bus->gpio, GPIO_MODE_OUTPUT);
gpio_set_level(bus->gpio, 0); // Drive DQ low
_us_delay(bus->timing->A);
gpio_set_level(bus->gpio, 1); // Release the bus
_us_delay(bus->timing->E);
gpio_set_direction(bus->gpio, GPIO_MODE_INPUT);
int level = gpio_get_level(bus->gpio);
_us_delay(bus->timing->F); // Complete the timeslot and 10us recovery
result = level & 0x01;
}
return result;
}
/**
* @brief Write 1-Wire data byte.
* @param[in] bus Initialised bus instance.
* @param[in] data Value to write.
*/
static void _write_byte(const OneWireBus * bus, uint8_t data)
{
if (_is_init(bus))
{
ESP_LOGD(TAG, "write 0x%02x", data);
for (int i = 0; i < 8; ++i)
{
_write_bit(bus, data & 0x01);
data >>= 1;
}
}
}
/**
* @brief Read 1-Wire data byte from bus.
* @param[in] bus Initialised bus instance.
* @return Byte value read from bus.
*/
static uint8_t _read_byte(const OneWireBus * bus)
{
uint8_t result = 0;
if (_is_init(bus))
{
for (int i = 0; i < 8; ++i)
{
result >>= 1;
if (_read_bit(bus))
{
result |= 0x80;
}
}
ESP_LOGD(TAG, "read 0x%02x", result);
}
return result;
}
/**
* @param Read a block of bytes from 1-Wire bus.
* @param[in] bus Initialised bus instance.
* @param[in,out] buffer Pointer to buffer to receive read data.
* @param[in] len Number of bytes to read, must not exceed length of receive buffer.
* @return Pointer to receive buffer.
*/
static uint8_t * _read_block(const OneWireBus * bus, uint8_t * buffer, unsigned int len)
{
for (int i = 0; i < len; ++i)
{
*buffer++ = _read_byte(bus);
}
return buffer;
}
/**
* @param Write a block of bytes from 1-Wire bus.
* @param[in] bus Initialised bus instance.
* @param[in] buffer Pointer to buffer to write data from.
* @param[in] len Number of bytes to write.
* @return Pointer to write buffer.
*/
static const uint8_t * _write_block(const OneWireBus * bus, const uint8_t * buffer, unsigned int len)
{
for (int i = 0; i < len; ++i)
{
_write_byte(bus, buffer[i]);
}
return buffer;
}
/**
* @brief 1-Wire 8-bit CRC lookup.
* @param[in] crc Starting CRC value. Pass in prior CRC to accumulate.
* @param[in] data Byte to feed into CRC.
* @return Resultant CRC value.
*/
static uint8_t _calc_crc(uint8_t crc, uint8_t data)
{
// https://www.maximintegrated.com/en/app-notes/index.mvp/id/27
static const uint8_t table[256] = {
0, 94, 188, 226, 97, 63, 221, 131, 194, 156, 126, 32, 163, 253, 31, 65,
157, 195, 33, 127, 252, 162, 64, 30, 95, 1, 227, 189, 62, 96, 130, 220,
35, 125, 159, 193, 66, 28, 254, 160, 225, 191, 93, 3, 128, 222, 60, 98,
190, 224, 2, 92, 223, 129, 99, 61, 124, 34, 192, 158, 29, 67, 161, 255,
70, 24, 250, 164, 39, 121, 155, 197, 132, 218, 56, 102, 229, 187, 89, 7,
219, 133, 103, 57, 186, 228, 6, 88, 25, 71, 165, 251, 120, 38, 196, 154,
101, 59, 217, 135, 4, 90, 184, 230, 167, 249, 27, 69, 198, 152, 122, 36,
248, 166, 68, 26, 153, 199, 37, 123, 58, 100, 134, 216, 91, 5, 231, 185,
140, 210, 48, 110, 237, 179, 81, 15, 78, 16, 242, 172, 47, 113, 147, 205,
17, 79, 173, 243, 112, 46, 204, 146, 211, 141, 111, 49, 178, 236, 14, 80,
175, 241, 19, 77, 206, 144, 114, 44, 109, 51, 209, 143, 12, 82, 176, 238,
50, 108, 142, 208, 83, 13, 239, 177, 240, 174, 76, 18, 145, 207, 45, 115,
202, 148, 118, 40, 171, 245, 23, 73, 8, 86, 180, 234, 105, 55, 213, 139,
87, 9, 235, 181, 54, 104, 138, 212, 149, 203, 41, 119, 244, 170, 72, 22,
233, 183, 85, 11, 136, 214, 52, 106, 43, 117, 151, 201, 74, 20, 246, 168,
116, 42, 200, 150, 21, 75, 169, 247, 182, 232, 10, 84, 215, 137, 107, 53
};
return table[crc ^ data];
}
static uint8_t _calc_crc_block(uint8_t crc, const uint8_t * buffer, size_t len)
{
uint8_t crc8 = 0;
do
{
crc8 = _calc_crc(crc8, *buffer++);
}
while (--len > 0);
return crc8;
}
static bool _search(const OneWireBus * bus, OneWireBus_SearchState * state)
{
// Based on https://www.maximintegrated.com/en/app-notes/index.mvp/id/187
// initialize for search
int id_bit_number = 1;
int last_zero = 0;
int rom_byte_number = 0;
int id_bit = 0;
int cmp_id_bit = 0;
uint8_t rom_byte_mask = 1;
uint8_t search_direction = 0;
bool search_result = false;
uint8_t crc8 = 0;
if (_is_init(bus))
{
// if the last call was not the last one
if (!state->last_device_flag)
{
// 1-Wire reset
if (!_reset(bus))
{
// reset the search
state->last_discrepancy = 0;
state->last_device_flag = false;
state->last_family_discrepancy = 0;
return false;
}
// issue the search command
_write_byte(bus, OWB_ROM_SEARCH);
// loop to do the search
do
{
// read a bit and its complement
id_bit = _read_bit(bus);
cmp_id_bit = _read_bit(bus);
// check for no devices on 1-wire
if ((id_bit == 1) && (cmp_id_bit == 1))
break;
else
{
// all devices coupled have 0 or 1
if (id_bit != cmp_id_bit)
search_direction = id_bit; // bit write value for search
else
{
// if this discrepancy if before the Last Discrepancy
// on a previous next then pick the same as last time
if (id_bit_number < state->last_discrepancy)
search_direction = ((state->rom_code.bytes[rom_byte_number] & rom_byte_mask) > 0);
else
// if equal to last pick 1, if not then pick 0
search_direction = (id_bit_number == state->last_discrepancy);
// if 0 was picked then record its position in LastZero
if (search_direction == 0)
{
last_zero = id_bit_number;
// check for Last discrepancy in family
if (last_zero < 9)
state->last_family_discrepancy = last_zero;
}
}
// set or clear the bit in the ROM byte rom_byte_number
// with mask rom_byte_mask
if (search_direction == 1)
state->rom_code.bytes[rom_byte_number] |= rom_byte_mask;
else
state->rom_code.bytes[rom_byte_number] &= ~rom_byte_mask;
// serial number search direction write bit
_write_bit(bus, search_direction);
// increment the byte counter id_bit_number
// and shift the mask rom_byte_mask
id_bit_number++;
rom_byte_mask <<= 1;
// if the mask is 0 then go to new SerialNum byte rom_byte_number and reset mask
if (rom_byte_mask == 0)
{
crc8 = _calc_crc(crc8, state->rom_code.bytes[rom_byte_number]); // accumulate the CRC
rom_byte_number++;
rom_byte_mask = 1;
}
}
}
while(rom_byte_number < 8); // loop until through all ROM bytes 0-7
// if the search was successful then
if (!((id_bit_number < 65) || (crc8 != 0)))
{
// search successful so set LastDiscrepancy,LastDeviceFlag,search_result
state->last_discrepancy = last_zero;
// check for last device
if (state->last_discrepancy == 0)
state->last_device_flag = true;
search_result = true;
}
}
// if no device found then reset counters so next 'search' will be like a first
if (!search_result || !state->rom_code.bytes[0])
{
state->last_discrepancy = 0;
state->last_device_flag = false;
state->last_family_discrepancy = 0;
search_result = false;
}
}
return search_result;
}
// Public API
OneWireBus * owb_malloc()
{
OneWireBus * bus = malloc(sizeof(*bus));
if (bus != NULL)
{
memset(bus, 0, sizeof(*bus));
ESP_LOGD(TAG, "malloc %p", bus);
}
else
{
ESP_LOGE(TAG, "malloc failed");
}
return bus;
}
void owb_free(OneWireBus ** bus)
{
if (bus != NULL && (*bus != NULL))
{
ESP_LOGD(TAG, "free %p", *bus);
free(*bus);
*bus = NULL;
}
}
void owb_init(OneWireBus * bus, int gpio)
{
if (bus != NULL)
{
bus->gpio = gpio;
bus->timing = &_StandardTiming;
bus->init = true;
// platform specific:
gpio_pad_select_gpio(bus->gpio);
}
else
{
ESP_LOGE(TAG, "bus is NULL");
}
}
void owb_use_crc(OneWireBus * bus, bool use_crc)
{
if (_is_init(bus))
{
bus->use_crc = use_crc;
ESP_LOGD(TAG, "use_crc %d", bus->use_crc);
}
}
OneWireBus_ROMCode owb_read_rom(const OneWireBus * bus)
{
OneWireBus_ROMCode rom_code = {0};
if (_is_init(bus))
{
if (_reset(bus))
{
_write_byte(bus, OWB_ROM_READ);
_read_block(bus, rom_code.bytes, sizeof(rom_code));
if (bus->use_crc)
{
if (owb_crc8_bytes(0, rom_code.bytes, sizeof(rom_code)) != 0)
{
ESP_LOGE(TAG, "CRC failed");
memset(rom_code.bytes, 0, sizeof(rom_code));
}
}
char rom_code_s[17];
owb_string_from_rom_code(rom_code, rom_code_s, sizeof(rom_code_s));
ESP_LOGD(TAG, "rom_code %s", rom_code_s);
}
else
{
ESP_LOGE(TAG, "ds18b20 device not responding");
}
}
return rom_code;
}
bool owb_verify_rom(const OneWireBus * bus, OneWireBus_ROMCode rom_code)
{
bool result = false;
if (_is_init(bus))
{
OneWireBus_SearchState state = {
.last_discrepancy = 64,
.last_device_flag = false,
};
if (_search(bus, &state))
{
result = true;
for (int i = 0; i < sizeof(state.rom_code.bytes) && result; ++i)
{
result = rom_code.bytes[i] == state.rom_code.bytes[i];
ESP_LOGD(TAG, "%02x %02x", rom_code.bytes[i], state.rom_code.bytes[i]);
}
ESP_LOGD(TAG, "rom code %sfound", result ? "" : "not ");
}
}
return result;
}
bool owb_reset(const OneWireBus * bus)
{
return _reset(bus);
}
void owb_write_byte(const OneWireBus * bus, uint8_t data)
{
_write_byte(bus, data);
}
uint8_t owb_read_byte(const OneWireBus * bus)
{
return _read_byte(bus);
}
uint8_t * owb_read_bytes(const OneWireBus * bus, uint8_t * buffer, unsigned int len)
{
return _read_block(bus, buffer, len);
}
const uint8_t * owb_write_bytes(const OneWireBus * bus, const uint8_t * buffer, unsigned int len)
{
return _write_block(bus, buffer, len);
}
void owb_write_rom_code(const OneWireBus * bus, OneWireBus_ROMCode rom_code)
{
_write_block(bus, (uint8_t *)&rom_code, sizeof(rom_code));
}
uint8_t owb_crc8_byte(uint8_t crc, uint8_t data)
{
return _calc_crc(crc, data);
}
uint8_t owb_crc8_bytes(uint8_t crc, const uint8_t * data, size_t len)
{
return _calc_crc_block(crc, data, len);
}
bool owb_search_first(const OneWireBus * bus, OneWireBus_SearchState * state)
{
bool result = false;
if (state != NULL)
{
memset(&state->rom_code, 0, sizeof(state->rom_code));
state->last_discrepancy = 0;
state->last_family_discrepancy = 0;
state->last_device_flag = false;
result = _search(bus, state);
}
else
{
ESP_LOGE(TAG, "state is NULL");
}
return result;
}
bool owb_search_next(const OneWireBus * bus, OneWireBus_SearchState * state)
{
bool result = false;
if (state != NULL)
{
result = _search(bus, state);
}
else
{
ESP_LOGE(TAG, "state is NULL");
}
return result;
}
char * owb_string_from_rom_code(OneWireBus_ROMCode rom_code, char * buffer, size_t len)
{
for (int i = sizeof(rom_code.bytes) - 1; i >= 0; i--)
{
sprintf(buffer, "%02x", rom_code.bytes[i]);
buffer += 2;
}
return buffer;
}

238
main/owb.h
View File

@ -1,238 +0,0 @@
/*
* MIT License
*
* Copyright (c) 2017 David Antliff
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
/**
* @file owb.h
* @brief Interface definitions for the 1-Wire bus component.
*
* This component provides structures and functions that are useful for communicating
* with devices connected to a Maxim Integrated 1-Wire® bus via a single GPIO.
*
* Currently only externally powered devices are supported. Parasitic power is not supported.
*/
#ifndef ONE_WIRE_BUS_H
#define ONE_WIRE_BUS_H
#include <stdint.h>
#include <stdbool.h>
#ifdef __cplusplus
extern "C" {
#endif
// ROM commands
#define OWB_ROM_SEARCH 0xF0
#define OWB_ROM_READ 0x33
#define OWB_ROM_MATCH 0x55
#define OWB_ROM_SKIP 0xCC
#define OWB_ROM_SEARCH_ALARM 0xEC
/**
* @brief Structure containing 1-Wire bus information relevant to a single instance.
*/
typedef struct
{
bool init; ///< True if struct has been initialised, otherwise false.
int gpio; ///< Value of GPIO connected to 1-Wire bus
const struct _OneWireBus_Timing * timing; ///< Pointer to timing information
bool use_crc; ///< True if CRC checks are to be used when retrieving information from a device on the bus
} OneWireBus;
/**
* @brief Represents a 1-Wire ROM Code. This is a sequence of eight bytes, where
* the first byte is the family number, then the following 6 bytes form the
* serial number. The final byte is the CRC8 check byte.
*/
typedef union
{
/// Provides access via field names
struct fields
{
uint8_t family[1]; ///< family identifier (1 byte, LSB - read/write first)
uint8_t serial_number[6]; ///< serial number (6 bytes)
uint8_t crc[1]; ///< CRC check byte (1 byte, MSB - read/write last)
} fields; ///< Provides access via field names
uint8_t bytes[8]; ///< Provides raw byte access
} OneWireBus_ROMCode;
/**
* @brief Represents the state of a device search on the 1-Wire bus.
*
* Pass a pointer to this structure to owb_search_first() and
* owb_search_next() to iterate through detected devices on the bus.
*/
typedef struct
{
OneWireBus_ROMCode rom_code;
int last_discrepancy;
int last_family_discrepancy;
int last_device_flag;
} OneWireBus_SearchState;
/**
* @brief Construct a new 1-Wire bus instance.
* New instance should be initialised before calling other functions.
* @return Pointer to new bus instance, or NULL if it cannot be created.
*/
OneWireBus * owb_malloc(void);
/**
* @brief Delete an existing device info instance.
* @param[in] bus Pointer to bus instance.
* @param[in,out] ds18b20_info Pointer to device info instance that will be freed and set to NULL.
*/
void owb_free(OneWireBus ** bus);
/**
* @brief Initialise a 1-Wire bus instance with the specified GPIO.
* @param[in] bus Pointer to bus instance.
* @param[in] gpio GPIO number to associate with device.
*/
void owb_init(OneWireBus * bus, int gpio);
/**
* @brief Enable or disable use of CRC checks on device communications.
* @param[in] bus Pointer to initialised bus instance.
* @param[in] use_crc True to enable CRC checks, false to disable.
*/
void owb_use_crc(OneWireBus * bus, bool use_crc);
/**
* @brief Read ROM code from device - only works when there is a single device on the bus.
* @param[in] bus Pointer to initialised bus instance.
* @return The value read from the device's ROM.
*/
OneWireBus_ROMCode owb_read_rom(const OneWireBus * bus);
/**
* @brief Verify the device specified by ROM code is present.
* @param[in] bus Pointer to initialised bus instance.
* @param[in] rom_code ROM code to verify.
* @return true if device is present, false if not present.
*/
bool owb_verify_rom(const OneWireBus * bus, OneWireBus_ROMCode rom_code);
/**
* @brief Reset the 1-Wire bus.
* @param[in] bus Pointer to initialised bus instance.
* @return True if at least one device is present on the bus.
*/
bool owb_reset(const OneWireBus * bus);
/**
* @brief Write a single byte to the 1-Wire bus.
* @param[in] bus Pointer to initialised bus instance.
* @param[in] data Byte value to write to bus.
*/
void owb_write_byte(const OneWireBus * bus, uint8_t data);
/**
* @brief Read a single byte from the 1-Wire bus.
* @param[in] bus Pointer to initialised bus instance.
* @return The byte value read from the bus.
*/
uint8_t owb_read_byte(const OneWireBus * bus);
/**
* @brief Read a number of bytes from the 1-Wire bus.
* @param[in] bus Pointer to initialised bus instance.
* @param[in, out] buffer Pointer to buffer to receive read data.
* @param[in] len Number of bytes to read, must not exceed length of receive buffer.
* @return Pointer to receive buffer.
*/
uint8_t * owb_read_bytes(const OneWireBus * bus, uint8_t * buffer, size_t len);
/**
* @brief Write a number of bytes to the 1-Wire bus.
* @param[in] bus Pointer to initialised bus instance.
* @param[in] buffer Pointer to buffer to write data from.
* @param[in] len Number of bytes to write.
* @return Pointer to write buffer.
*/
const uint8_t * owb_write_bytes(const OneWireBus * bus, const uint8_t * buffer, size_t len);
/**
* @brief Write a ROM code to the 1-Wire bus ensuring LSB is sent first.
* @param[in] bus Pointer to initialised bus instance.
* @param[in] rom_code ROM code to write to bus.
*/
void owb_write_rom_code(const OneWireBus * bus, OneWireBus_ROMCode rom_code);
/**
* @brief 1-Wire 8-bit CRC lookup.
* @param[in] crc Starting CRC value. Pass in prior CRC to accumulate.
* @param[in] data Byte to feed into CRC.
* @return Resultant CRC value.
* Should be zero if last byte was the CRC byte and the CRC matches.
*/
uint8_t owb_crc8_byte(uint8_t crc, uint8_t data);
/**
* @brief 1-Wire 8-bit CRC lookup with accumulation over a block of bytes.
* @param[in] crc Starting CRC value. Pass in prior CRC to accumulate.
* @param[in] data Array of bytes to feed into CRC.
* @param[in] len Length of data array in bytes.
* @return Resultant CRC value.
* Should be zero if last byte was the CRC byte and the CRC matches.
*/
uint8_t owb_crc8_bytes(uint8_t crc, const uint8_t * data, size_t len);
/**
* @brief Locates the first device on the 1-Wire bus, if present.
* @param[in] bus Pointer to initialised bus instance.
* @param[in,out] state Pointer to an existing search state structure.
* @return True if a device is found, false if no devices are found.
* If a device is found, the ROM Code can be obtained from the state.
*/
bool owb_search_first(const OneWireBus * bus, OneWireBus_SearchState * state);
/**
* @brief Locates the next device on the 1-Wire bus, if present, starting from
* the provided state. Further calls will yield additional devices, if present.
* @param[in] bus Pointer to initialised bus instance.
* @param[in,out] state Pointer to an existing search state structure.
* @return True if a device is found, false if no devices are found.
* If a device is found, the ROM Code can be obtained from the state.
*/
bool owb_search_next(const OneWireBus * bus, OneWireBus_SearchState * state);
/**
* @brief Create a string representation of a ROM code.
* @param[in] rom_code The ROM code to convert to string representation.
* @param[out] buffer The destination for the string representation. It will be null terminated.
* @param[in] len The length of the buffer in bytes. 64-bit ROM codes require 16 characters
* to represent as a string, plus a null terminator, for 17 bytes.
*/
char * owb_string_from_rom_code(OneWireBus_ROMCode rom_code, char * buffer, size_t len);
#ifdef __cplusplus
}
#endif
#endif // ONE_WIRE_BUS_H

280
sdkconfig
View File

@ -1,280 +0,0 @@
#
# Automatically generated file; DO NOT EDIT.
# Espressif IoT Development Framework Configuration
#
#
# SDK tool configuration
#
CONFIG_TOOLPREFIX="xtensa-esp32-elf-"
CONFIG_PYTHON="python"
#
# Bootloader config
#
# CONFIG_LOG_BOOTLOADER_LEVEL_NONE is not set
# CONFIG_LOG_BOOTLOADER_LEVEL_ERROR is not set
# CONFIG_LOG_BOOTLOADER_LEVEL_WARN is not set
CONFIG_LOG_BOOTLOADER_LEVEL_INFO=y
# CONFIG_LOG_BOOTLOADER_LEVEL_DEBUG is not set
# CONFIG_LOG_BOOTLOADER_LEVEL_VERBOSE is not set
CONFIG_LOG_BOOTLOADER_LEVEL=3
#
# Security features
#
# CONFIG_SECURE_BOOT_ENABLED is not set
# CONFIG_FLASH_ENCRYPTION_ENABLED is not set
#
# Serial flasher config
#
CONFIG_ESPTOOLPY_PORT="/dev/cu.SLAB_USBtoUART"
# CONFIG_ESPTOOLPY_BAUD_115200B is not set
# CONFIG_ESPTOOLPY_BAUD_230400B is not set
CONFIG_ESPTOOLPY_BAUD_921600B=y
# CONFIG_ESPTOOLPY_BAUD_2MB is not set
# CONFIG_ESPTOOLPY_BAUD_OTHER is not set
CONFIG_ESPTOOLPY_BAUD_OTHER_VAL=115200
CONFIG_ESPTOOLPY_BAUD=921600
CONFIG_ESPTOOLPY_COMPRESSED=y
# CONFIG_FLASHMODE_QIO is not set
# CONFIG_FLASHMODE_QOUT is not set
CONFIG_FLASHMODE_DIO=y
# CONFIG_FLASHMODE_DOUT is not set
CONFIG_ESPTOOLPY_FLASHMODE="dio"
# CONFIG_ESPTOOLPY_FLASHFREQ_80M is not set
CONFIG_ESPTOOLPY_FLASHFREQ_40M=y
# CONFIG_ESPTOOLPY_FLASHFREQ_26M is not set
# CONFIG_ESPTOOLPY_FLASHFREQ_20M is not set
CONFIG_ESPTOOLPY_FLASHFREQ="40m"
# CONFIG_ESPTOOLPY_FLASHSIZE_1MB is not set
CONFIG_ESPTOOLPY_FLASHSIZE_2MB=y
# CONFIG_ESPTOOLPY_FLASHSIZE_4MB is not set
# CONFIG_ESPTOOLPY_FLASHSIZE_8MB is not set
# CONFIG_ESPTOOLPY_FLASHSIZE_16MB is not set
CONFIG_ESPTOOLPY_FLASHSIZE="2MB"
CONFIG_ESPTOOLPY_FLASHSIZE_DETECT=y
CONFIG_ESPTOOLPY_BEFORE_RESET=y
# CONFIG_ESPTOOLPY_BEFORE_NORESET is not set
CONFIG_ESPTOOLPY_BEFORE="default_reset"
CONFIG_ESPTOOLPY_AFTER_RESET=y
# CONFIG_ESPTOOLPY_AFTER_NORESET is not set
CONFIG_ESPTOOLPY_AFTER="hard_reset"
# CONFIG_MONITOR_BAUD_9600B is not set
# CONFIG_MONITOR_BAUD_57600B is not set
CONFIG_MONITOR_BAUD_115200B=y
# CONFIG_MONITOR_BAUD_230400B is not set
# CONFIG_MONITOR_BAUD_921600B is not set
# CONFIG_MONITOR_BAUD_2MB is not set
# CONFIG_MONITOR_BAUD_OTHER is not set
CONFIG_MONITOR_BAUD_OTHER_VAL=115200
CONFIG_MONITOR_BAUD=115200
#
# Partition Table
#
CONFIG_PARTITION_TABLE_SINGLE_APP=y
# CONFIG_PARTITION_TABLE_TWO_OTA is not set
# CONFIG_PARTITION_TABLE_CUSTOM is not set
CONFIG_PARTITION_TABLE_CUSTOM_FILENAME="partitions.csv"
CONFIG_PARTITION_TABLE_CUSTOM_APP_BIN_OFFSET=0x10000
CONFIG_PARTITION_TABLE_FILENAME="partitions_singleapp.csv"
CONFIG_APP_OFFSET=0x10000
CONFIG_OPTIMIZATION_LEVEL_DEBUG=y
# CONFIG_OPTIMIZATION_LEVEL_RELEASE is not set
#
# Component config
#
# CONFIG_AWS_IOT_SDK is not set
# CONFIG_BT_ENABLED is not set
CONFIG_BT_RESERVE_DRAM=0
#
# ESP32-specific
#
# CONFIG_ESP32_DEFAULT_CPU_FREQ_80 is not set
CONFIG_ESP32_DEFAULT_CPU_FREQ_160=y
# CONFIG_ESP32_DEFAULT_CPU_FREQ_240 is not set
CONFIG_ESP32_DEFAULT_CPU_FREQ_MHZ=160
CONFIG_MEMMAP_SMP=y
# CONFIG_MEMMAP_TRACEMEM is not set
# CONFIG_MEMMAP_TRACEMEM_TWOBANKS is not set
# CONFIG_ESP32_TRAX is not set
CONFIG_TRACEMEM_RESERVE_DRAM=0x0
# CONFIG_ESP32_ENABLE_COREDUMP_TO_FLASH is not set
# CONFIG_ESP32_ENABLE_COREDUMP_TO_UART is not set
CONFIG_ESP32_ENABLE_COREDUMP_TO_NONE=y
# CONFIG_ESP32_ENABLE_COREDUMP is not set
# CONFIG_ESP32_APPTRACE_DEST_TRAX is not set
# CONFIG_ESP32_APPTRACE_DEST_UART is not set
CONFIG_ESP32_APPTRACE_DEST_NONE=y
# CONFIG_ESP32_APPTRACE_ENABLE is not set
# CONFIG_TWO_UNIVERSAL_MAC_ADDRESS is not set
CONFIG_FOUR_UNIVERSAL_MAC_ADDRESS=y
CONFIG_NUMBER_OF_UNIVERSAL_MAC_ADDRESS=4
CONFIG_SYSTEM_EVENT_QUEUE_SIZE=32
CONFIG_SYSTEM_EVENT_TASK_STACK_SIZE=4096
CONFIG_MAIN_TASK_STACK_SIZE=4096
CONFIG_IPC_TASK_STACK_SIZE=1024
CONFIG_NEWLIB_STDOUT_ADDCR=y
# CONFIG_NEWLIB_NANO_FORMAT is not set
CONFIG_CONSOLE_UART_DEFAULT=y
# CONFIG_CONSOLE_UART_CUSTOM is not set
# CONFIG_CONSOLE_UART_NONE is not set
CONFIG_CONSOLE_UART_NUM=0
CONFIG_CONSOLE_UART_BAUDRATE=115200
# CONFIG_ULP_COPROC_ENABLED is not set
CONFIG_ULP_COPROC_RESERVE_MEM=0
# CONFIG_ESP32_PANIC_PRINT_HALT is not set
CONFIG_ESP32_PANIC_PRINT_REBOOT=y
# CONFIG_ESP32_PANIC_SILENT_REBOOT is not set
# CONFIG_ESP32_PANIC_GDBSTUB is not set
CONFIG_ESP32_DEBUG_OCDAWARE=y
CONFIG_INT_WDT=y
CONFIG_INT_WDT_TIMEOUT_MS=300
CONFIG_INT_WDT_CHECK_CPU1=y
CONFIG_TASK_WDT=y
# CONFIG_TASK_WDT_PANIC is not set
CONFIG_TASK_WDT_TIMEOUT_S=5
CONFIG_TASK_WDT_CHECK_IDLE_TASK=y
CONFIG_TASK_WDT_CHECK_IDLE_TASK_CPU1=y
# CONFIG_ESP32_TIME_SYSCALL_USE_RTC is not set
CONFIG_ESP32_TIME_SYSCALL_USE_RTC_FRC1=y
# CONFIG_ESP32_TIME_SYSCALL_USE_FRC1 is not set
# CONFIG_ESP32_TIME_SYSCALL_USE_NONE is not set
CONFIG_ESP32_RTC_CLOCK_SOURCE_INTERNAL_RC=y
# CONFIG_ESP32_RTC_CLOCK_SOURCE_EXTERNAL_CRYSTAL is not set
CONFIG_ESP32_RTC_CLK_CAL_CYCLES=1024
CONFIG_ESP32_DEEP_SLEEP_WAKEUP_DELAY=2000
# CONFIG_ESP32_XTAL_FREQ_40 is not set
# CONFIG_ESP32_XTAL_FREQ_26 is not set
CONFIG_ESP32_XTAL_FREQ_AUTO=y
CONFIG_ESP32_XTAL_FREQ=0
CONFIG_WIFI_ENABLED=y
CONFIG_ESP32_WIFI_STATIC_RX_BUFFER_NUM=10
CONFIG_ESP32_WIFI_DYNAMIC_RX_BUFFER_NUM=32
# CONFIG_ESP32_WIFI_STATIC_TX_BUFFER is not set
CONFIG_ESP32_WIFI_DYNAMIC_TX_BUFFER=y
CONFIG_ESP32_WIFI_TX_BUFFER_TYPE=1
CONFIG_ESP32_WIFI_DYNAMIC_TX_BUFFER_NUM=32
CONFIG_ESP32_WIFI_AMPDU_ENABLED=y
CONFIG_ESP32_WIFI_NVS_ENABLED=y
CONFIG_PHY_ENABLED=y
#
# PHY
#
CONFIG_ESP32_PHY_CALIBRATION_AND_DATA_STORAGE=y
# CONFIG_ESP32_PHY_INIT_DATA_IN_PARTITION is not set
CONFIG_ESP32_PHY_MAX_WIFI_TX_POWER=20
CONFIG_ESP32_PHY_MAX_TX_POWER=20
# CONFIG_ETHERNET is not set
#
# FAT Filesystem support
#
CONFIG_FATFS_CODEPAGE_ASCII=y
# CONFIG_FATFS_CODEPAGE_437 is not set
# CONFIG_FATFS_CODEPAGE_720 is not set
# CONFIG_FATFS_CODEPAGE_737 is not set
# CONFIG_FATFS_CODEPAGE_771 is not set
# CONFIG_FATFS_CODEPAGE_775 is not set
# CONFIG_FATFS_CODEPAGE_850 is not set
# CONFIG_FATFS_CODEPAGE_852 is not set
# CONFIG_FATFS_CODEPAGE_855 is not set
# CONFIG_FATFS_CODEPAGE_857 is not set
# CONFIG_FATFS_CODEPAGE_860 is not set
# CONFIG_FATFS_CODEPAGE_861 is not set
# CONFIG_FATFS_CODEPAGE_862 is not set
# CONFIG_FATFS_CODEPAGE_863 is not set
# CONFIG_FATFS_CODEPAGE_864 is not set
# CONFIG_FATFS_CODEPAGE_865 is not set
# CONFIG_FATFS_CODEPAGE_866 is not set
# CONFIG_FATFS_CODEPAGE_869 is not set
# CONFIG_FATFS_CODEPAGE_932 is not set
# CONFIG_FATFS_CODEPAGE_936 is not set
# CONFIG_FATFS_CODEPAGE_949 is not set
# CONFIG_FATFS_CODEPAGE_950 is not set
CONFIG_FATFS_CODEPAGE=1
CONFIG_FATFS_MAX_LFN=255
#
# FreeRTOS
#
# CONFIG_FREERTOS_UNICORE is not set
CONFIG_FREERTOS_CORETIMER_0=y
# CONFIG_FREERTOS_CORETIMER_1 is not set
CONFIG_FREERTOS_HZ=100
CONFIG_FREERTOS_ASSERT_ON_UNTESTED_FUNCTION=y
# CONFIG_FREERTOS_CHECK_STACKOVERFLOW_NONE is not set
# CONFIG_FREERTOS_CHECK_STACKOVERFLOW_PTRVAL is not set
CONFIG_FREERTOS_CHECK_STACKOVERFLOW_CANARY=y
# CONFIG_FREERTOS_WATCHPOINT_END_OF_STACK is not set
CONFIG_FREERTOS_THREAD_LOCAL_STORAGE_POINTERS=1
CONFIG_FREERTOS_ASSERT_FAIL_ABORT=y
# CONFIG_FREERTOS_ASSERT_FAIL_PRINT_CONTINUE is not set
# CONFIG_FREERTOS_ASSERT_DISABLE is not set
CONFIG_FREERTOS_BREAK_ON_SCHEDULER_START_JTAG=y
# CONFIG_ENABLE_MEMORY_DEBUG is not set
CONFIG_FREERTOS_IDLE_TASK_STACKSIZE=1024
CONFIG_FREERTOS_ISR_STACKSIZE=1536
# CONFIG_FREERTOS_LEGACY_HOOKS is not set
CONFIG_FREERTOS_MAX_TASK_NAME_LEN=16
# CONFIG_SUPPORT_STATIC_ALLOCATION is not set
CONFIG_TIMER_TASK_PRIORITY=1
CONFIG_TIMER_TASK_STACK_DEPTH=2048
CONFIG_TIMER_QUEUE_LENGTH=10
# CONFIG_FREERTOS_DEBUG_INTERNALS is not set
#
# Log output
#
# CONFIG_LOG_DEFAULT_LEVEL_NONE is not set
# CONFIG_LOG_DEFAULT_LEVEL_ERROR is not set
# CONFIG_LOG_DEFAULT_LEVEL_WARN is not set
# CONFIG_LOG_DEFAULT_LEVEL_INFO is not set
CONFIG_LOG_DEFAULT_LEVEL_DEBUG=y
# CONFIG_LOG_DEFAULT_LEVEL_VERBOSE is not set
CONFIG_LOG_DEFAULT_LEVEL=4
CONFIG_LOG_COLORS=y
#
# LWIP
#
# CONFIG_L2_TO_L3_COPY is not set
CONFIG_LWIP_MAX_SOCKETS=10
CONFIG_LWIP_THREAD_LOCAL_STORAGE_INDEX=0
# CONFIG_LWIP_SO_REUSE is not set
# CONFIG_LWIP_SO_RCVBUF is not set
CONFIG_LWIP_DHCP_MAX_NTP_SERVERS=1
# CONFIG_LWIP_IP_FRAG is not set
# CONFIG_LWIP_IP_REASSEMBLY is not set
CONFIG_TCP_MAXRTX=12
CONFIG_TCP_SYNMAXRTX=6
CONFIG_LWIP_DHCP_DOES_ARP_CHECK=y
CONFIG_TCPIP_TASK_STACK_SIZE=2560
# CONFIG_PPP_SUPPORT is not set
#
# mbedTLS
#
CONFIG_MBEDTLS_SSL_MAX_CONTENT_LEN=16384
# CONFIG_MBEDTLS_DEBUG is not set
# CONFIG_MBEDTLS_UNSAFE_ACCELERATION is not set
CONFIG_MBEDTLS_HAVE_TIME=y
# CONFIG_MBEDTLS_HAVE_TIME_DATE is not set
#
# OpenSSL
#
# CONFIG_OPENSSL_DEBUG is not set
CONFIG_OPENSSL_ASSERT_DO_NOTHING=y
# CONFIG_OPENSSL_ASSERT_EXIT is not set
#
# SPI Flash driver
#
# CONFIG_SPI_FLASH_ENABLE_COUNTERS is not set
CONFIG_SPI_FLASH_ROM_DRIVER_PATCH=y
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