ADC stays in LOCK with polling method

[sde c.1]

I have a project where i use the HAL library to poll the ADC.

Controller STM32G473VC. Cube IDE 1.9.0

.

During the code i call ADC_24V_getADCvalue() at different places but never in interrupt routines .

Even though after a few calls HAL_ADC_ConfigChannel returns always HAL_LOCK.

Any idea ?

static ADC_HandleTypeDef 		*phandleradc1,*phandleradc2;
static ADC_ChannelConfTypeDef 	sConfig = { 0 };
 
void analog_init(ADC_HandleTypeDef *phadc1, ADC_HandleTypeDef *phadc2) {
	phandleradc1 = phadc1;
	phandleradc2 = phadc2;
 
	sConfig.SamplingTime = ADC_SAMPLETIME_640CYCLES_5;
	sConfig.Rank = ADC_REGULAR_RANK_1;
	sConfig.SingleDiff = ADC_SINGLE_ENDED;
	sConfig.OffsetNumber = ADC_OFFSET_NONE;
	sConfig.Offset = 0;
}
static uint16_t GetADCValueADC2(){
	uint16_t result;
	HAL_ADC_Start(phandleradc2);
	HAL_ADC_PollForConversion(phandleradc2,2);
	result = HAL_ADC_GetValue(phandleradc2);
	HAL_ADC_Stop(phandleradc2);
	return result;
}
uint16_t ADC_24V_getADCvalue(void) {
	HAL_StatusTypeDef result;
	
	sConfig.Channel = ADC_CHANNEL_3;
	result = HAL_ADC_ConfigChannel(phandleradc2, &sConfig);
	
	if (result != HAL_OK) {
		Error_Handler();
	}
	return GetADCValueADC2();
}