finished onboarding challenge

lm75bd/lm75bd.c

@@ -27,6 +27,22 @@ error_code_t lm75bdInit(lm75bd_config_t *config) {
 
 error_code_t readTempLM75BD(uint8_t devAddr, float *temp) {
   /* Implement this driver function */
+  if (!temp) return ERR_CODE_INVALID_ARG;
+
+  error_code_t errCode; 
+
+  uint8_t pointerTempValue = 0;
+  uint8_t pointerRegisterSize = 1;
+  RETURN_IF_ERROR_CODE(i2cSendTo(LM75BD_OBC_I2C_ADDR, &pointerTempValue, pointerRegisterSize));
+
+  uint8_t tempRegisterSize = 2;
+  uint8_t tempBuff[2] = {0};  
+  RETURN_IF_ERROR_CODE(i2cReceiveFrom(LM75BD_OBC_I2C_ADDR, tempBuff, tempRegisterSize));
+
+  uint8_t isNegative = tempBuff[0] >> 7;
+  uint16_t tempData = (tempBuff[0] << 3) + (tempBuff[1] >> 5);
+  *temp = isNegative ? -1 * ((tempData ^ 0x7FF) + 1) : tempData;
+  *temp *= 0.125;
 
   return ERR_CODE_SUCCESS;
 }

lm75bd/lm75bd.h

@@ -5,7 +5,7 @@
 #include <stdint.h>
 
 /* LM75BD I2C Device Address */
-#define LM75BD_OBC_I2C_ADDR /* Define the address here */
+#define LM75BD_OBC_I2C_ADDR 0x4FU
 
 /* LM75BD Configuration Values */
 #define LM75BD_DEV_OP_MODE_NORMAL 0x00U

services/thermal_mgr/thermal_mgr.c

@@ -2,6 +2,7 @@
 #include "errors.h"
 #include "lm75bd.h"
 #include "console.h"
+#include "logging.h"
 
 #include <FreeRTOS.h>
 #include <os_task.h>
@@ -43,18 +44,54 @@ void initThermalSystemManager(lm75bd_config_t *config) {
 
 error_code_t thermalMgrSendEvent(thermal_mgr_event_t *event) {
   /* Send an event to the thermal manager queue */
+  if (!event) return ERR_CODE_INVALID_ARG;
+  if (!thermalMgrQueueHandle) return ERR_CODE_QUEUE_NOT_CREATED;
+
+  if (xQueueSend(thermalMgrQueueHandle, event, 0) != pdTRUE) return ERR_CODE_QUEUE_FULL;
 
   return ERR_CODE_SUCCESS;
 }
 
 void osHandlerLM75BD(void) {
   /* Implement this function */
+  thermal_mgr_event_t event;
+  event.type = THERMAL_MGR_EVENT_INTERRUPT;
+  thermalMgrSendEvent(&event);
 }
 
 static void thermalMgr(void *pvParameters) {
   /* Implement this task */
+  lm75bd_config_t config = *(lm75bd_config_t *)pvParameters;
+  thermal_mgr_event_t event;
+  float temp;
+
   while (1) {
-
+    error_code_t error;
+
+    if (xQueueReceive(thermalMgrQueueHandle, &event, portMAX_DELAY) == pdTRUE) {
+      switch (event.type) {
+        case THERMAL_MGR_EVENT_MEASURE_TEMP_CMD:
+          error = readTempLM75BD(config.devAddr, &temp);
+          if (error != ERR_CODE_SUCCESS) {
+            LOG_ERROR_CODE(error);
+            break;
+          }
+          addTemperatureTelemetry(temp);
+          break;
+        case THERMAL_MGR_EVENT_INTERRUPT:
+          error = readTempLM75BD(config.devAddr, &temp);
+          if (error != ERR_CODE_SUCCESS) {
+            LOG_ERROR_CODE(error);
+            break;
+          }
+          if (temp > config.hysteresisThresholdCelsius) {
+            overTemperatureDetected();
+          } else {
+            safeOperatingConditions();
+          }
+          break;
+      }
+    }
   }
 }
 

services/thermal_mgr/thermal_mgr.h

@@ -5,6 +5,7 @@
 
 typedef enum {
   THERMAL_MGR_EVENT_MEASURE_TEMP_CMD,
+  THERMAL_MGR_EVENT_INTERRUPT,
 
 } thermal_mgr_event_type_t;
 

sys/errors.h

@@ -13,6 +13,7 @@ typedef enum {
     ERR_CODE_MUTEX_TIMEOUT = 100,
     ERR_CODE_QUEUE_FULL = 101,
     ERR_CODE_INVALID_QUEUE_MSG = 102,
+    ERR_CODE_QUEUE_NOT_CREATED = 103,
 
     /* Driver errors */
     ERR_CODE_I2C_TRANSFER_TIMEOUT = 200,