Im attempting to migrate code from a STML0 to L4 and I am getting very different values from the calibration values on the L0 the Values are 666 and 911 and I am getting consistat temperature reading that are within a couple of degrees of the ambient temperature. On the STM32L412 if a read the values using int16_t TEMP130_CAL=*TEMPSENSOR_CAL2_ADDR; and int16_t TEMP30_CAL=*TEMPSENSOR_CAL1_ADDR; I get 1381 1037 and the ADC values are similar to the L0 either using ( myTemp -TEMP30_CAL)*(130 - 30)/(TEMP130_CAL - TEMP30_CAL)+30 or __LL_ADC_CALC_TEMPERATURE(3300, myTemp , LL_ADC_RESOLUTION_12B); consistantly returns a temperature of -60 to-80 degrees
int main(void)
{
/* USER CODE BEGIN 1 */
char buff[50];
uint16_t myTemp;
uint16_t myTemp1;
float temperature;
ADC_ChannelConfTypeDef sConfig = {0};
int16_t TEMP130_CAL=*TEMPSENSOR_CAL2_ADDR;
int16_t TEMP30_CAL=*TEMPSENSOR_CAL1_ADDR;
uint16_t n;
/* USER CODE END 1 */
/* MCU Configuration--------------------------------------------------------*/
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
HAL_Init();
/* USER CODE BEGIN Init */
/* USER CODE END Init */
/* Configure the system clock */
SystemClock_Config();
/* USER CODE BEGIN SysInit */
/* USER CODE END SysInit */
/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_USART2_UART_Init();
MX_TIM2_Init();
MX_TIM6_Init();
MX_ADC1_Init();
/* USER CODE BEGIN 2 */
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
sConfig.Channel = ADC_CHANNEL_TEMPSENSOR; //ADC_Channel_TempSensor = ADC_Channel_18 on STM32f7xx
sConfig.Rank = 1;
sConfig.SamplingTime = ADC_SAMPLETIME_12CYCLES_5;
HAL_ADC_ConfigChannel(&hadc1, &sConfig);
HAL_ADC_Start(&hadc1);
HAL_ADC_PollForConversion(&hadc1, 100);
myTemp = HAL_ADC_GetValue(&hadc1);
temperature = ( myTemp -TEMP30_CAL)*(130 - 30)/(TEMP130_CAL - TEMP30_CAL)+30;
//temperature = __LL_ADC_CALC_TEMPERATURE(3300, myTemp , LL_ADC_RESOLUTION_12B);
n = sprintf(buff," temp %3.4f deg C %d raw %d %d \r\n",temperature,myTemp,TEMP130_CAL,TEMP30_CAL);
HAL_UART_Transmit(&huart2,buff,n,1000);
temperature = __LL_ADC_CALC_TEMPERATURE(3300, myTemp , LL_ADC_RESOLUTION_12B);
temperature = (( myTemp1 -TEMP30_CAL)*(110 - 30)/(TEMP130_CAL - TEMP30_CAL))+30;
n = sprintf(buff," temp1 %3.4f deg C %d raw %d %d \r\n",temperature,myTemp,TEMP130_CAL,TEMP30_CAL);
HAL_UART_Transmit(&huart2,buff,n,1000);
*/ HAL_GPIO_TogglePin(LD3_GPIO_Port, LD3_Pin);
HAL_Delay(1000);
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
}
/* USER CODE END 3 */
}
Output
temp -79.0000 deg C 660 raw 1381 1037
temp -79.0000 deg C 661 raw 1381 1037
temp -79.0000 deg C 662 raw 1381 1037
temp -78.0000 deg C 663 raw 1381 1037
temp -79.0000 deg C 661 raw 1381 1037
temp -78.0000 deg C 663 raw 1381 1037
