STM32F4 (F4 discovery board) interrupt Issue

Posted on May 20, 2014 at 02:58

We have had a lot of rain lately, so the cool morning fog seems to have clouded my crystal ball. Do you mind showing us the code for the error condition ?

Cheers, Hal

Posted on May 20, 2014 at 09:37

Hey Hal,

My code was generated with STM32Cube (I have attached the project file).

In the options of the project, I delete optimizations of the code.

Here is the function main with my user code:

int main(void)

{

/* USER CODE BEGIN 1 */

uint8_t i = 0;

/* USER CODE END 1 */

/* MCU Configuration----------------------------------------------------------*/

/* Reset of all peripherals, Initializes the Flash interface and the Systick. */

HAL_Init();

/* Configure the system clock */

SystemClock_Config();

/* Initialize all configured peripherals */

MX_GPIO_Init();

MX_ADC1_Init();

MX_I2S2_Init();

MX_TIM1_Init();

MX_TIM2_Init();

MX_USART3_UART_Init();

/* USER CODE BEGIN 2 */

HAL_GPIO_WritePin(GPIOD, GPIO_PIN_12, GPIO_PIN_SET);

HAL_GPIO_WritePin(GPIOD, GPIO_PIN_14, GPIO_PIN_SET);

HAL_ADC_Start_IT(&hadc1);

HAL_TIM_OC_Start(&htim2, TIM_CHANNEL_1);

/* USER CODE END 2 */

/* USER CODE BEGIN 3 */

/* Infinite loop */

while (1)

{

}

/* USER CODE END 3 */

}

Here is the callback of my ADC interrupt:

/* USER CODE BEGIN 0 */

#define NB_MEAN_SAMPLE_PHOTODIODE 10000.0

uint8_t sEndRecord = 0;

float sMeanPhotodiodePower = 0;

uint8_t sDetectObject = 0;

uint16_t sNbSamplePhotodiode = 0;

float wADCValue = 0.0;

void HAL_ADC_ConvCpltCallback(ADC_HandleTypeDef* hadc)

{

if(sNbSamplePhotodiode < NB_MEAN_SAMPLE_PHOTODIODE)

{

sMeanPhotodiodePower = HAL_ADC_GetValue(hadc)/NB_MEAN_SAMPLE_PHOTODIODE + sMeanPhotodiodePower;

sNbSamplePhotodiode ++;

}

else

{

if ((wADCValue=(float)HAL_ADC_GetValue(hadc))<(sMeanPhotodiodePower-30))

{

sDetectObject ++;

}

else

{

sDetectObject = 0;

}

}

}

With this simple project, we can just enter once in the ADC interrupt.

But If, for example, I comment

if ((wADCValue=(float)HAL_ADC_GetValue(hadc))<(sMeanPhotodiodePower-30))

{

sDetectObject ++;

}

else

{

sDetectObject = 0;

}

My ADC interrupt is periodically called.

This workstooby commenting the configuration of an I/O

For example this I/O:

GPIO_InitStruct.Pin = GPIO_PIN_12;

GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;

GPIO_InitStruct.Pull = GPIO_NOPULL;

GPIO_InitStruct.Speed = GPIO_SPEED_MEDIUM;

HAL_GPIO_Init(GPIOD, &GPIO_InitStruct);

Thanks for your interest,

________________

Attachments :

MainProject.ioc : https://st--c.eu10.content.force.com/sfc/dist/version/download/?oid=00Db0000000YtG6&ids=0680X000006I0nZ&d=%2Fa%2F0X0000000bdm%2FfqwxhhCK5QAmQ.qMgTT00tFwVEoGEBsiuF6BLqPr7jQ&asPdf=false

Posted on May 21, 2014 at 09:08

This does not really explain how is the ADC triggered.

If you suspect this is a flaw in the Cube library, you should post in the dedicated sub-forum https://my.st.com/public/STe2ecommunities/mcu/Lists/STM32Java/AllItems.aspx

JW