GENERATE PWM using ADC values

[venkateswarlu]

if (HAL_GPIO_ReadPin(USER_Btn_GPIO_Port, USER_Btn_Pin))
{
HAL_GPIO_WritePin(TIGGER_GPIO_Port, TIGGER_Pin, GPIO_PIN_SET);
HAL_ADC_Start_IT(&hadc1);
HAL_TIM_PWM_Start_DMA(&htim1, TIM_CHANNEL_1,(uint32_t*) pwmData1, 300);
HAL_GPIO_WritePin(TIGGER_GPIO_Port, TIGGER_Pin, GPIO_PIN_RESET);

}

 

void HAL_ADC_ConvCpltCallback(ADC_HandleTypeDef* hadc)
{
digitalValue2 = (((HAL_ADC_GetValue(&hadc1)) * 3.3f) / 4095.0f);

HAL_ADC_Stop_IT(&hadc1);

if( (digitalValue2 >= 0.0) && (digitalValue2 < 1.0))
{

for (int j = 0; j <= 300; j++)
{
pwmData1[j] = 100;
pwmData1[299] = 0;
}
}
else if ((digitalValue2 >= 1.0) && (digitalValue2 < 2.0))
{

for (int j = 0; j <= 300; j++)
{
pwmData1[j] = 300;
pwmData1[299] = 0;
}
}
else if ((digitalValue2 >= 2.0) && (digitalValue2 < 3.4))
{

for (int j = 0; j <= 300; j++)
{
pwmData1[j] = 200;
pwmData1[299] = 0;
}
}
else
{

for (int j = 0; j <= 300; j++)
{
pwmData1[j] = 50;
pwmData1[299] = 0;
}

}

HAL_ADC_Start_IT(&hadc1);
}

i am using this function using PWM generate and ADC interrupt function

using this every time updating the width it is taking 2ms delay

[MM..1]

Primary dont start stop ADC, secondary your for cycles is ugly. And for any type of two device data transfers you require sync it.