Conversion wait of 1ms is ridiculous - can we set up a continuous ADC conversion on Callback ???

[jlsilicon]

A Conversion wait of 1ms on this high speed microcontroller seems ridiculous.

Could we have a continuous loop reading the ADC pin(s) - then post the readings in a global Var to read at our convenience - instead of holding the micro up ?

Ie: Is there a way simple to Start the Adc Conversion, then Set the Result into a glabal (such as LastAdcReading) in the Callback.

=>

Looking at :

int HAL_ADC_GET_INPUT_VOLTAGE(ADC_HandleTypeDef* hadc) { int value; double voltage = 0.0;

assert_param(IS_ADC_ALL_INSTANCE(hadc->Instance));

HAL_ADC_Start(hadc);
HAL_ADC_PollForConversion(hadc);
HAL_ADC_Stop(hadc);

value = HAL_ADC_GetValue(hadc);
voltage = (double)value / 4.0 * (126363 / 1000.0) / 1000000 + 1.196;

value = (int)(voltage * 1000);
return value;

}

=>

For example to use :

double ADC_Last = 0.0 ;

main() { ... ADC_Init(); // HAL_ADC_Init(hadc); ... }

static void ADC_Init(void) { hadc.Instance = ADC; hadc.Init.channel = ADC_CHANNEL_0; hadc.Init.freq = 1000;

if (HAL_ADC_Init(&hadc) != HAL_OK)
{
    Error_Handler();
}

}

void ADC_Start() { assert_param(IS_ADC_ALL_INSTANCE(hadc->Instance));

HAL_ADC_Start(hadc);

// HAL_ADC_PollForConversion(hadc); }

void HAL_ADC_ConvCpltCallback(ADC_HandleTypeDef* hadc) { int value; double voltage = 0.0;

// HAL_ADC_PollForConversion(hadc); HAL_ADC_Stop(hadc);

value = HAL_ADC_GetValue(hadc);
voltage = (double)value / 4.0 * (126363 / 1000.0) / 1000000 + 1.196;

value = (int)(voltage * 1000);
ADC_Last = value ;

;

assert_param(IS_ADC_ALL_INSTANCE(hadc->Instance));

HAL_ADC_Start(hadc);

// HAL_ADC_PollForConversion(hadc); }

[AnatolSher]

Good question... We need to think about it :)

[board707]

A Conversion wait of 1ms on this high speed microcontroller seems ridiculous.

I could agree with you, but datasheet clearly stated, that the maximum ADC rate is 1000 samples in second - so give us a 1ms delay between samples.