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116 lines
3.3 KiB
116 lines
3.3 KiB
#include <inttypes.h>
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#include "freertos/FreeRTOS.h"
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#include "freertos/task.h"
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#include "esp_system.h"
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// Uncomment to enable static (stack-based) allocation of instances and avoid malloc/free.
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//#define USE_STATIC 1
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#ifdef USE_STATIC
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# include "owb_static.h"
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# include "ds18b20_static.h"
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#else
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# include "owb.h"
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# include "ds18b20.h"
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#endif
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#define GPIO_DS18B20_0 (GPIO_NUM_4)
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#define MAX_DEVICES (8)
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void app_main()
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{
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// Create a 1-Wire bus
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#ifdef USE_STATIC
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OneWireBus_Static owb_static; // static allocation
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OneWireBus * owb = &owb_static;
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#else
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OneWireBus * owb = owb_malloc(); // heap allocation
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#endif
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owb_init(owb, GPIO_DS18B20_0);
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owb_use_crc(owb, true); // enable CRC check for ROM code
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// find all connected devices
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uint8_t device_rom_codes[8][MAX_DEVICES] = {0};
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int num_devices = 0;
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OneWireBus_SearchState search_state = {0};
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bool found = owb_search_first(owb, &search_state);
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while (found)
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{
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printf("Device %d found: ", num_devices);
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for (int i = 7; i >= 0; i--)
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{
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device_rom_codes[num_devices][i] = search_state.rom_code[i];
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printf("%02x", search_state.rom_code[i]);
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}
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printf("\n");
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++num_devices;
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found = owb_search_next(owb, &search_state);
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}
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//uint64_t rom_code = 0x0001162e87ccee28; // pink
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//uint64_t rom_code = 0xf402162c6149ee28; // green
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//uint64_t rom_code = 0x1502162ca5b2ee28; // orange
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//uint64_t rom_code = owb_read_rom(owb);
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//printf("1-Wire ROM code 0x%08" PRIx64 "\n", rom_code);
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// Create a DS18B20 device on the 1-Wire bus
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#ifdef USE_STATIC
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DS18B20_Info_Static ds18b20_info_static; // static allocation
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DS18B20_Info * ds18b20_info = &ds18b20_info_static;
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DS18B20_Info devices_static[MAX_DEVICES] = {0};
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DS18B20_Info * devices[MAX_DEVICES] = {0};
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for (int i = 0; i < MAX_DEVICES; ++i)
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{
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devices[i] = &(devices_static[i]);
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}
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#else
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DS18B20_Info * ds18b20_info = ds18b20_malloc(); // heap allocation
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DS18B20_Info * devices[MAX_DEVICES] = {0};
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#endif
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for (int i = 0; i < num_devices; ++i)
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{
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#ifdef USE_STATIC
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DS18B20_Info * ds18b20_info = devices[i];
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#else
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DS18B20_Info * ds18b20_info = ds18b20_malloc(); // heap allocation
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devices[i] = ds18b20_info;
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#endif
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uint64_t rom_code = 0;
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for (int j = 7; j >= 0; --j)
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{
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rom_code |= ((uint64_t)device_rom_codes[i][j] << (8 * j));
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}
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printf("1-Wire ROM code 0x%08" PRIx64 "\n", rom_code);
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ds18b20_init(ds18b20_info, owb, rom_code); // associate with bus and device
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//ds18b20_init_solo(ds18b20_info, owb); // only one device on bus
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ds18b20_use_crc(ds18b20_info, true); // enable CRC check for temperature readings
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}
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while (1)
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{
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for (int i = 0; i < num_devices; ++i)
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{
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float temp = ds18b20_get_temp(devices[i]);
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printf("Temp %d: %.1f degrees C\n", i, temp);
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}
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vTaskDelay(1000 / portTICK_PERIOD_MS);
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}
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for (int i = 10; i >= 0; i--) {
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printf("Restarting in %d seconds...\n", i);
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vTaskDelay(1000 / portTICK_PERIOD_MS);
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}
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ds18b20_free(&ds18b20_info);
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owb_free(&owb);
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printf("Restarting now.\n");
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fflush(stdout);
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esp_restart();
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}
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