Associate III

Question

ADC STM32f0xx Hi everyone, I want to turn on LEDs whith a Potentiometer an ADC in STM32f091RC nucleo Board. I wrote this code, but it doesn't work. I am a beginner and I do not know where I have mistakes. I would be grateful if someone please help m

Forum|Forum|6 years ago
May 10, 2020
8 replies
3399 views

#include <stdio.h>
#include "diag/Trace.h"
#include "stm32f0xx.h"
#include "stm32f0xx_conf.h"
#include "pin.h"
#include "adc.h"
 
int main(int argc, char* argv[])
{
 
	 //(#) ADC pins (pA1) configuration --------------------------------------------------------------
 
	GPIO_InitTypeDef GPIO_InitStructure;
	 RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
	 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;
	 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
	 GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;
	 GPIO_Init(GPIOA, &GPIO_InitStructure);
 
//leds (pB0... pB3) configuration--------------------------------------------------------------
 
 
	 GPIO_InitTypeDef GPIO_LEDs;
	 		 RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOB, ENABLE); 
	 		 GPIO_LEDs.GPIO_Pin = GPIO_Pin_0 |GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3;
	 		 GPIO_LEDs.GPIO_Mode = GPIO_Mode_OUT;
	 		 GPIO_LEDs.GPIO_OType = GPIO_OType_PP;
	 		 GPIO_LEDs.GPIO_Speed = GPIO_Speed_50MHz;
	 		 GPIO_LEDs.GPIO_PuPd = GPIO_PuPd_NOPULL;
	 		 GPIO_Init(GPIOB, &GPIO_LEDs);
//ADC-------------------------------------------------------------------------------------------
	 ADC_InitTypeDef ADC_InitStructure;
	 RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
	 ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;
	 ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
	 ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;
	 ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
	 ADC_InitStructure.ADC_ScanDirection = ADC_ScanDirection_Upward;
	 ADC_Init(ADC1, &ADC_InitStructure);
 
	 ADC_GetCalibrationFactor(ADC1);
 ADC_Cmd(ADC1, ENABLE);
 while(ADC_GetFlagStatus(ADC1, ADC_FLAG_ADEN) == RESET);
 ADC_StartOfConversion(ADC1);
	 uint16_t valueADC = ADC_GetConversionValue(ADC1);
	 ADC_ChannelConfig(ADC1, ADC_Channel_1, ADC_SampleTime_1_5Cycles);
 
	 //dma--------------------------------------------------------------------------------------
	 DMA_InitTypeDef DMA_InitStructure;
	 RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1 , ENABLE);
	 DMA_DeInit(DMA1_Channel1);
	 DMA_InitStructure.DMA_PeripheralBaseAddr= (uint32_t)&ADC1->DR;
	 DMA_InitStructure.DMA_MemoryBaseAddr=(uint32_t)&valueADC;
	 DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
	 DMA_InitStructure.DMA_BufferSize = 2;
	 DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
	 DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
	 DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
	 DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
	 DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
	 DMA_InitStructure.DMA_Priority = DMA_Priority_High;
	 DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
	 DMA_Init(DMA1_Channel1, &DMA_InitStructure);
 	 DMA_Cmd(DMA1_Channel1, ENABLE);
	 ADC_DMARequestModeConfig(ADC1, ADC_DMAMode_Circular);
	 ADC_DMACmd(ADC1, ENABLE);
 
 
		 while(!ADC_GetFlagStatus(ADC1, ADC_FLAG_EOC));//Processing the conversion
 
		 return ADC_GetConversionValue(ADC1); //Return the converted data
		 ADC_StartOfConversion(ADC1);
 
	while (1)
		if(valueADC<2000){
		GPIO_SetBits(GPIOB, GPIO_Pin_0);
		}
		else if(valueADC>2000){
			GPIO_SetBits(GPIOB, GPIO_Pin_1);
			 }
}
 // Infinite loop, never return.

This topic has been closed for replies.

TDK

		 return ADC_GetConversionValue(ADC1); //Return the converted data

The main() function will return when it hits this statement. It never gets to the main loop.

"If you feel a post has answered your question, please click ""Accept as Solution""."

Nmo.1Author

Associate III

should I delete this part completely?

bnymntrz

Associate III

It would be better if you create a function other than main and read the adc operation and perform the cycle inside that function and call it in the location in the main.

Nmo.1Author

Associate III

yes you are right. but it is easier for me to write everything in the main.

bnymntrz

Associate III

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 uint32_t valueADC (void){
 
 ADC_RegularChannelConfig(ADC1,ADC_Channel_9,1,ADC_SampleTime_56Cycles);
 ADC_SoftwareStartConv(ADC1);
	while(!ADC_GetFlagStatus(ADC1,ADC_FLAG_EOC));
	return ADC_GetConversionValue(ADC1);
 
 }
 
int main(int argc, char* argv[])
{
 
	 //(#) ADC pins (pA1) configuration --------------------------------------------------------------
 
	GPIO_InitTypeDef GPIO_InitStructure;
	 RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
	 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;
	 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
	 GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;
	 GPIO_Init(GPIOA, &GPIO_InitStructure);
 
//leds (pB0... pB3) configuration--------------------------------------------------------------
 
 
	 GPIO_InitTypeDef GPIO_LEDs;
	 		 RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOB, ENABLE); 
	 		 GPIO_LEDs.GPIO_Pin = GPIO_Pin_0 |GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3;
	 		 GPIO_LEDs.GPIO_Mode = GPIO_Mode_OUT;
	 		 GPIO_LEDs.GPIO_OType = GPIO_OType_PP;
	 		 GPIO_LEDs.GPIO_Speed = GPIO_Speed_50MHz;
	 		 GPIO_LEDs.GPIO_PuPd = GPIO_PuPd_NOPULL;
	 		 GPIO_Init(GPIOB, &GPIO_LEDs);
//ADC-------------------------------------------------------------------------------------------
	 ADC_InitTypeDef ADC_InitStructure;
	 RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
	 ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;
	 ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
	 ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;
	 ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
	 ADC_InitStructure.ADC_ScanDirection = ADC_ScanDirection_Upward;
	 ADC_Init(ADC1, &ADC_InitStructure);
 
	 ADC_GetCalibrationFactor(ADC1);
 ADC_Cmd(ADC1, ENABLE);
 
 
	 uint16_t valueADC = ADC_GetConversionValue(ADC1);
	 
 
	 //dma--------------------------------------------------------------------------------------
	 DMA_InitTypeDef DMA_InitStructure;
	 RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1 , ENABLE);
	 DMA_DeInit(DMA1_Channel1);
	 DMA_InitStructure.DMA_PeripheralBaseAddr= (uint32_t)&ADC1->DR;
	 DMA_InitStructure.DMA_MemoryBaseAddr=(uint32_t)&valueADC;
	 DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
	 DMA_InitStructure.DMA_BufferSize = 2;
	 DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
	 DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
	 DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
	 DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
	 DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
	 DMA_InitStructure.DMA_Priority = DMA_Priority_High;
	 DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
	 DMA_Init(DMA1_Channel1, &DMA_InitStructure);
 	 DMA_Cmd(DMA1_Channel1, ENABLE);
	 ADC_DMARequestModeConfig(ADC1, ADC_DMAMode_Circular);
	 ADC_DMACmd(ADC1, ENABLE);
 
 
 
	while (1)
 
 uint16_t valueADC = ADC_GetConversionValue(ADC1);
 
		if(valueADC<2000){
		GPIO_SetBits(GPIOB, GPIO_Pin_0);
		}
		else if(valueADC>2000){
			GPIO_SetBits(GPIOB, GPIO_Pin_1);
			 }
}

I also recommend you to try it.

Nmo.1Author

Associate III

I write with STM32f0, so I have to change your code a bit.

but that doesn't work yet.

ADC_ChannelConfig(ADC1,ADC_Channel_9,ADC_SampleTime_55_5Cycles);
 
ADC_StartOfConversion(ADC1);

bnymntrz

Associate III

Set the cycle for yourself, but it will work like this.

bnymntrz

Associate III

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 uint32_t ReadValue;
 
 uint32_t valueADC (void){
 
 ADC_RegularChannelConfig(ADC1,ADC_Channel_9,1,ADC_SampleTime_56Cycles);
 ADC_SoftwareStartConv(ADC1);
	while(!ADC_GetFlagStatus(ADC1,ADC_FLAG_EOC));
	return ADC_GetConversionValue(ADC1);
 
 }
 
int main(int argc, char* argv[])
{
 
	 //(#) ADC pins (pA1) configuration --------------------------------------------------------------
 
	GPIO_InitTypeDef GPIO_InitStructure;
	 RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
	 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;
	 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
	 GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;
	 GPIO_Init(GPIOA, &GPIO_InitStructure);
 
//leds (pB0... pB3) configuration--------------------------------------------------------------
 
 
	 GPIO_InitTypeDef GPIO_LEDs;
	 		 RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOB, ENABLE); 
	 		 GPIO_LEDs.GPIO_Pin = GPIO_Pin_0 |GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3;
	 		 GPIO_LEDs.GPIO_Mode = GPIO_Mode_OUT;
	 		 GPIO_LEDs.GPIO_OType = GPIO_OType_PP;
	 		 GPIO_LEDs.GPIO_Speed = GPIO_Speed_50MHz;
	 		 GPIO_LEDs.GPIO_PuPd = GPIO_PuPd_NOPULL;
	 		 GPIO_Init(GPIOB, &GPIO_LEDs);
//ADC-------------------------------------------------------------------------------------------
	 ADC_InitTypeDef ADC_InitStructure;
	 RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
	 ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;
	 ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
	 ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;
	 ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
	 ADC_InitStructure.ADC_ScanDirection = ADC_ScanDirection_Upward;
	 ADC_Init(ADC1, &ADC_InitStructure);
 
	 ADC_GetCalibrationFactor(ADC1);
 ADC_Cmd(ADC1, ENABLE);
 
 
 
 
	 //dma--------------------------------------------------------------------------------------
	 DMA_InitTypeDef DMA_InitStructure;
	 RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1 , ENABLE);
	 DMA_DeInit(DMA1_Channel1);
	 DMA_InitStructure.DMA_PeripheralBaseAddr= (uint32_t)&ADC1->DR;
	 DMA_InitStructure.DMA_MemoryBaseAddr=(uint32_t)&valueADC;
	 DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
	 DMA_InitStructure.DMA_BufferSize = 2;
	 DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
	 DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
	 DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
	 DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
	 DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
	 DMA_InitStructure.DMA_Priority = DMA_Priority_High;
	 DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
	 DMA_Init(DMA1_Channel1, &DMA_InitStructure);
 	 DMA_Cmd(DMA1_Channel1, ENABLE);
	 ADC_DMARequestModeConfig(ADC1, ADC_DMAMode_Circular);
	 ADC_DMACmd(ADC1, ENABLE);
 
 
 
	while (1)
 
 ReadValue = valueADC();
 
		if(ReadValue<2000){
		GPIO_SetBits(GPIOB, GPIO_Pin_0);
		}
		else if(ReadValue>2000){
			GPIO_SetBits(GPIOB, GPIO_Pin_1);
			 }
}

Would you try again this way? Please

Nmo.1Author

Associate III

in STM32f0xx we have not code "ADC_RegularChannelConfig..." we have ADC_ChannelConfig(ADC1,ADC_Channel_9,ADC_SampleTime_55_5Cycles);

and we have not "ADC_SoftwareStartConv(ADC1);.."

bnymntrz

Associate III

But they certainly have a counterpart in the ADC library of f0xx.

That's all I can think of.:smiling_face_with_smiling_eyes:

bnymntrz

Associate III

I made a correction in the code let's try deleting the unit16_t part in while

Uint 16 in loop should be Uint 32 or Uint should not be written.

bnymntrz

Associate III

ADC_RegularChannelConfig(ADC1, ADC_Channel_9, ADC_SampleTime_55_5Cycles);

should be

Nmo.1Author

Associate III

Unfortunately, no. Does not work yet

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