HB, OTA etc

2026-04-22 20:11:55 +03:00
parent 4100931deb
commit cb1014c950
76 changed files with 3157 additions and 232 deletions
--- a/esp32/main/ds18b20.cpp
+++ b/esp32/main/ds18b20.cpp
@@ -0,0 +1,85 @@
+#include "ds18b20.h"
+
+extern "C" {
+#include "onewire_bus.h"
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+#include "esp_log.h"
+}
+
+static const char *TAG = "ds18b20";
+
+static onewire_bus_handle_t bus;
+
+uint8_t ds_crc8(const uint8_t *data, int len)
+{
+    uint8_t crc = 0;
+    for (int i = 0; i < len; i++) {
+        uint8_t inbyte = data[i];
+        for (int j = 0; j < 8; j++) {
+            uint8_t mix = (crc ^ inbyte) & 0x01;
+            crc >>= 1;
+            if (mix) crc ^= 0x8C;
+            inbyte >>= 1;
+        }
+    }
+    return crc;
+}
+
+void ds18b20_init(gpio_num_t pin)
+{
+    onewire_bus_config_t bus_config = {};
+    bus_config.bus_gpio_num = pin;
+
+    onewire_bus_rmt_config_t rmt_config = {};
+    rmt_config.max_rx_bytes = 10;
+
+    ESP_ERROR_CHECK(onewire_new_bus_rmt(&bus_config, &rmt_config, &bus));
+
+    ESP_LOGI(TAG, "OneWire bus initialized");
+}
+
+float ds18b20_read()
+{
+    uint8_t data[9];
+    uint8_t buf[4] = {0x4E, 0, 0, 0x3F}; // 10-bit (0x3F)
+    // reset
+    ESP_ERROR_CHECK(onewire_bus_reset(bus));
+
+    // SKIP ROM (один датчик)
+    uint8_t cmd = 0xCC;
+    ESP_ERROR_CHECK(onewire_bus_write_bytes(bus, &cmd, 1));
+    //ESP_ERROR_CHECK(onewire_bus_write_bytes(bus, buf, 4));
+    // CONVERT T
+    cmd = 0x44;
+    ESP_ERROR_CHECK(onewire_bus_write_bytes(bus, &cmd, 1));
+
+    vTaskDelay(pdMS_TO_TICKS(750));
+
+    // reset снова
+    ESP_ERROR_CHECK(onewire_bus_reset(bus));
+
+    // SKIP ROM
+    cmd = 0xCC;
+    ESP_ERROR_CHECK(onewire_bus_write_bytes(bus, &cmd, 1));
+
+    // READ SCRATCHPAD
+    cmd = 0xBE;
+    ESP_ERROR_CHECK(onewire_bus_write_bytes(bus, &cmd, 1));
+
+    ESP_ERROR_CHECK(onewire_bus_read_bytes(bus, data, 9));
+
+    ESP_LOGI(TAG,
+            "RAW: %02X %02X %02X %02X %02X %02X %02X %02X | CRC %02X",
+            data[0], data[1], data[2], data[3],
+            data[4], data[5], data[6], data[7], data[8]);
+
+    uint8_t crc = ds_crc8(data, 8);
+    if (crc != data[8]) {
+        ESP_LOGW(TAG, "CRC error");
+    }
+
+    int16_t raw = (data[1] << 8) | data[0];
+    return raw / 16.0f;
+}
+