Posted on June 16, 2016 at 16:43
I'm facing with a problem regarding continuous acquisition of ADC channel in STM32F
I use the interrupt at the end of conversion to call a callback function to store the acquired value.
The problem regards the callback that is called only the first time.
I configured my project using STM32CubeMx for continuos acquisition and interrupt generation.
This is the ADC configuration:
hadc1.Instance = ADC1;
hadc1.Init.ScanConvMode = ADC_SCAN_DISABLE;
hadc1.Init.ContinuousConvMode = ENABLE;
hadc1.Init.DiscontinuousConvMode = DISABLE;
hadc1.Init.ExternalTrigConv = ADC_SOFTWARE_START;
hadc1.Init.DataAlign = ADC_DATAALIGN_RIGHT;
hadc1.Init.NbrOfConversion = 1;
if (HAL_ADC_Init(&hadc1) != HAL_OK)
{
Error_Handler();
}
/**Configure Regular Channel
*/
sConfig.Channel = ADC_CHANNEL_11;
sConfig.Rank = 1;
sConfig.SamplingTime = ADC_SAMPLETIME_71CYCLES_5;
if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
{
Error_Handler();
}
This is my acquisition function:
ea_ADC_Err_Code_t ea_ADC_n_data_read(Adc_Channel_t channel, adc_eoc_callback adc_cb)
{
ea_ADC_Err_Code_t err_code = ADC_ERR;
ADC_ChannelConfTypeDef sConfig;
adc_read_value = 0;
adc_eoc_cb = adc_cb;
n_adc_acquisition = ADC_MAX_CONS_ACQ;
/* Deinit ADC */
//while(HAL_ADC_DeInit(&adc_handler) != HAL_OK);
/* Initialize ADC */
//HAL_ADC_Init(&adc_handler);
/* Configure ADC Channel */
sConfig.Channel = channel;
sConfig.Rank = 1;
sConfig.SamplingTime = ADC_SAMPLETIME_71CYCLES_5;
HAL_ADC_ConfigChannel(&adc_handler, &sConfig);
/* ADC Calibration */
//HAL_ADCEx_Calibration_Start(&adc_handler);
/* Start conversion with interrupt*/
if (HAL_ADC_Start_IT(&adc_handler) == HAL_OK)
{
err_code = ADC_OK;
}
return err_code;
}
And finally my callback:
void HAL_ADC_ConvCpltCallback(ADC_HandleTypeDef* hadc)
{
if (n_adc_acquisition)
{
adc_read_value += HAL_ADC_GetValue(&adc_handler);
n_adc_acquisition--;
edi_Print_L1(''ADC Callback %d\n'', n_adc_acquisition);
}
else
{
HAL_ADC_Stop_IT(&adc_handler);
adc_read_value = adc_read_value >> ADC_DIVIDE_BY_EIGTH;
adc_eoc_cb(adc_read_value);
}
}
Do I forgot something int the callback?
Thanks a lot!
