How to get the values from multi channels using one ADC block

[MChoi.5]

Hi,

I am trying to get two voltages using two channels with one ADC block.​

My MUC is STM32F103RB. The followings are configruation of ADC and my program code.

HAL_ADC_Start(&hadc2);

for(;;) {

ret = HAL_ADC_PollForConversion(&hadc2, 100);

if(ret == HAL_OK) {

val = HAL_ADC_GetValue(&hadc2);

}

else {

val = 0;

}

printf("#1: %ld\r\n", val1);

ret = HAL_ADC_PollForConversion(&hadc2, 100);

if(ret == HAL_OK) {

val = HAL_ADC_GetValue(&hadc2);

}

else {

val = 0;

}

printf("#2: %ld\r\n", val2);

}

Since the 3.3V line was connected to #1 and #2 was not connected, I expected the values ​​of #1 to be about 4000 and #2 to be about 2800.

However, the actual result is either the values ​​of # 1 and # 2 appear to be opposite to each other, or they represent the same value.

I'd like to know what I should do.

[Tesla DeLorean]

You should use DMA to place into an array, then use the DMA HT or TC in place of the ADC EOC

[MChoi.5]

My program has several tasks based on FreeRTOS(9.0.0) and CMSIS(1.02). After start the ADC using HAL_ADC_Start_DMA(), other tasks are not worked. Should any other functions be used?