I have managed to get ADC working in Interrupt mode and can read the three sensors values into a buffer called ADC3_VALUES[] on each of 3 callback events triggered by the ADC....
/* USER CODE BEGIN 1 */
void HAL_ADC_ConvCpltCallback(ADC_HandleTypeDef* hadc)
{
if(hadc->Instance == ADC3)
{
/* Return ADC converted value -> return hadc->Instance->DR;*/
ADC3_VALUES[iRankCounter++] = HAL_ADC_GetValue(&hadc3);
if(iRankCounter == 2) PIP_BUSY = PIP_NOT_BUSY;
}
}
PIP_BUSY is just a local flag used to determine if all 3 integer values have been read. Read is Once only (Single Conversion) triggered with HAL_ADC_Start_IT(&hadc3);
All references I find for things like STM32L4 or F7 (e.g. STM32L4xx_HAL_Driver) look like this or similar:
#define VREFINT_CAL_ADDR ((uint16_t*) ((uint32_t)0x1FFF75AA))
#define VREFINT_CAL_VREF ((uint32_t) 3000)
#define TEMPSENSOR_CAL1_ADDR ((uint16_t*) ((uint32_t)0x1FFF75A8))
#define TEMPSENSOR_CAL2_ADDR ((uint16_t*) ((uint32_t)0x1FFF75CA))
#define TEMPSENSOR_CAL1_TEMP (( int32_t) 30)
#define TEMPSENSOR_CAL2_TEMP (( int32_t) 110)
#define TEMPSENSOR_CAL_VREFANALOG ((uint32_t) 3000)
This address 0x1FFF75AA when called in something like...
uint16_t vrefCal;
vrefCal = *((uint16_t*)VREFINT_CAL_ADDR);
...simply throws a void HardFault_Handler(void) stm32h7xx_it.c
Have tried a load of addresses including 0x1FF07A4A 0x58003C00 0x1FFF75AA 0x1FFFF7BA from various example projects.
I would very much like a STM32H7 friendly version of something like Damien George's https://gitrepos.estec.esa.int/taste/uPython-mirror/blob/e72353cc48f1ac2869458625aa0ebae7b6bfe24f/stmhal/adc.c
Basically need to read factory CALIBRATION values and use them to prepare float variables containing VBat VRef and Vdd in Volts (%.2f)
Can anyone point me in the right direction ?
