[ARM] STM32F0 Discovery ADC problem

bulanik.mantik · Jun 21, 2014

hi everyone,
i am working on my STM32F0 discovery kit and i am trying to learn how to read analog values. i wrote this program but it doesnt work and i dont know why. can someone help me why this code doesnt work. thanks for your help.
best regards.

Code:

#include <stdint.h>
#include <system_stm32f0xx.h>
#include <stm32f0xx_gpio.h>
#include "stm32f0xx.h"
#include "stm32f0xx_adc.h"
#include "stm32f0xx_dma.h"
#include "stm32f0xx_rcc.h"
#include <stm32f0xx_usart.h>
#include <stm32f0xx_misc.h>

#define ADC1_DR_Address 0x40012440

uint32_t TempSensVoltmv = 0, VrefIntVoltmv = 0;
uint16_t RegularConvData_Tab[2];

void uart_send_char(char chr);
void uart_send_string(unsigned char *string);

void USART2_IRQHandler(void)
{
	char temp;
	temp=USART_ReceiveData(USART2);
	uart_send_char(temp);
}

void uart_send_char(char chr)
{
	while (USART_GetFlagStatus(USART2, USART_FLAG_TXE) == RESET);
	USART_SendData(USART2, chr);
}

void uart_send_string(unsigned char *string)
{
    while(*string)
    {
    	uart_send_char(*string);
        *string++;
    }
}

int main(void)
{
	uint32_t times;
	char str[20];

	ADC_InitTypeDef     ADC_InitStructure;
	DMA_InitTypeDef     DMA_InitStructure;
	USART_InitTypeDef 	USART_InitStructure;
	GPIO_InitTypeDef 	GPIO_InitStructure;
	NVIC_InitTypeDef 	NVIC_InitStruct;
	/*rcc ayrlarıe*************************************/
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
	RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1 , ENABLE);
	RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
	RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2,ENABLE);
	/*gpio ayarları************************************/
	GPIO_PinAFConfig(GPIOA, GPIO_PinSource2, GPIO_AF_1);
	GPIO_PinAFConfig(GPIOA, GPIO_PinSource3, GPIO_AF_1);
	GPIO_InitStructure.GPIO_Pin =  GPIO_Pin_2 | GPIO_Pin_3;
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
	GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
	GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
	GPIO_Init(GPIOA, &GPIO_InitStructure);
	/*usart ayarları***********************************/
	USART_InitStructure.USART_BaudRate = 115200;
	USART_InitStructure.USART_WordLength = USART_WordLength_8b;
	USART_InitStructure.USART_StopBits = USART_StopBits_1;
	USART_InitStructure.USART_Parity = USART_Parity_No;
	USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
	USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
	USART_Init(USART2, &USART_InitStructure);
	USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);
	/*kesme ayarları***********************************/
	NVIC_InitStruct.NVIC_IRQChannel = USART2_IRQn;
	NVIC_InitStruct.NVIC_IRQChannelCmd = ENABLE;
	NVIC_Init(&NVIC_InitStruct);
	/******************************************************/
	USART_Cmd(USART2,ENABLE); //usart2 aktif et
	/******************************************************/
	ADC_DeInit(ADC1);
	/*dma ayarları*****************************************/
	DMA_DeInit(DMA1_Channel1);
	DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)ADC1_DR_Address;
	DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)RegularConvData_Tab;
	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);
	/*adc ayarları******************************************/
	ADC_StructInit(&ADC_InitStructure);
	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_Backward;
	ADC_Init(ADC1, &ADC_InitStructure);

	ADC_ChannelConfig(ADC1, ADC_Channel_TempSensor , ADC_SampleTime_55_5Cycles);
	ADC_TempSensorCmd(ENABLE);

	ADC_ChannelConfig(ADC1, ADC_Channel_Vrefint , ADC_SampleTime_55_5Cycles);
	ADC_VrefintCmd(ENABLE);

	ADC_GetCalibrationFactor(ADC1);
	ADC_Cmd(ADC1, ENABLE);

	while(!ADC_GetFlagStatus(ADC1, ADC_FLAG_ADEN));
	ADC_StartOfConversion(ADC1);

	while(1)
    {
	    while((DMA_GetFlagStatus(DMA1_FLAG_TC1)) == RESET );
	    DMA_ClearFlag(DMA1_FLAG_TC1);

//	    TempSensVoltmv = (uint32_t)((RegularConvData_Tab[0]* 3300) / 0xFFF);
//	    VrefIntVoltmv  = (uint32_t)((RegularConvData_Tab[1]* 3300) / 0xFFF);

	    TempSensVoltmv = RegularConvData_Tab[0];
	    VrefIntVoltmv  = RegularConvData_Tab[1];

	    uart_send_string("----------------------\r\n");
	    sprintf(str,"Sicaklik: \t%d\r\n",TempSensVoltmv);
		uart_send_string(str);

	    sprintf(str,"VRef: \t\t%d\r\n",VrefIntVoltmv);
		uart_send_string(str);
		uart_send_string("----------------------\r\n");
		for(times = 0; times < 5000000; times++);
    }
}

bulanik.mantik · Jun 23, 2014

i guess nobody can find any mistake or problem. whatever i am trying to find the proplem. if i would find it, i will write it down here.
thanks
have a great day.

PA3040 · Jun 23, 2014

Hoped, This link will help

https://sites.google.com/site/johnkneenmicrocontrollers/17-adc_dac/adc_f107#linkadcref

bulanik.mantik · Jun 23, 2014

@PA3040 thanks for your answer. i thing i made my configration correct but clearly it is not correct because it is not working and i dont know why. i coundnt find my mistake.

PA3040 · Jun 23, 2014

Is UART working?

bulanik.mantik · Jun 23, 2014

yes. with this code, i always see 4095 on analog value from usart.

bigdogguru · Jun 23, 2014

Can you post a link to the actual Discovery board you are currently using?

I may have one here and if so, I'll attempt to troubleshoot the issue.

BigDog

bulanik.mantik · Jun 23, 2014

i am using STM32F0 Discovery, here is the link

HTML:

http://www.st.com/web/catalog/tools/FM116/SC959/SS1532/PF253215

thanks for your help.

bigdogguru · Jun 23, 2014

Unfortunately, that is about the only Discovery board I do not possess. :grin:

If I have the time I'll examine your code later tonight and see what I can find.

BigDog

bulanik.mantik · Jun 23, 2014

ah thanks anyway i hope you will have a change to look it.

Realy · Jun 27, 2014

Now ，I will give you some code.i wish it can help to you!!

Code C - [expand]
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#include"ADC.h"
 
 
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
#define ADC1_DR_Address                0x40012440
__IO uint16_t RegularConvData_Tab[2];
void ADC1_DMA_Init(void)
{
  ADC_InitTypeDef     ADC_InitStruct;
  DMA_InitTypeDef     DMA_InitStruct;
    GPIO_InitTypeDef    GPIO_InitStruct;
      /* ADC1 DeInit */  
  ADC_DeInit(ADC1);
    /* Enable  GPIOA clock */
    RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
  /* ADC1 Periph clock enable */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
  /* DMA1 clock enable */
  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1 , ENABLE);
 
  /* Configure PA.01  as analog input */
  GPIO_InitStruct.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1;//
  GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AN;
    GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_NOPULL ;
  GPIO_Init(GPIOA, &GPIO_InitStruct);               // PC1,输入时不用设置速率
 
 
  /* DMA1 Channel1 Config */
  DMA_DeInit(DMA1_Channel1);
  DMA_InitStruct.DMA_PeripheralBaseAddr = (uint32_t)ADC1_DR_Address;
  DMA_InitStruct.DMA_MemoryBaseAddr = (uint32_t)&RegularConvData_Tab;
  DMA_InitStruct.DMA_DIR = DMA_DIR_PeripheralSRC;
  DMA_InitStruct.DMA_BufferSize =4;
  DMA_InitStruct.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
  DMA_InitStruct.DMA_MemoryInc = DMA_MemoryInc_Enable;
  DMA_InitStruct.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
  DMA_InitStruct.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
  DMA_InitStruct.DMA_Mode = DMA_Mode_Circular;
  DMA_InitStruct.DMA_Priority = DMA_Priority_High;
  DMA_InitStruct.DMA_M2M = DMA_M2M_Disable;
  DMA_Init(DMA1_Channel1, &DMA_InitStruct);
  
    DMA_DeInit(DMA1_Channel2);
 
  /* DMA1 Channel1 enable */
  DMA_Cmd(DMA1_Channel1, ENABLE);
  
//   /* ADC DMA request in circular mode */
  ADC_DMARequestModeConfig(ADC1, ADC_DMAMode_Circular);
  
  /* Enable ADC_DMA */
  ADC_DMACmd(ADC1, ENABLE);  
  
  /* Initialize ADC structure */
  ADC_StructInit(&ADC_InitStruct);
  
  /* Configure the ADC1 in continous mode withe a resolutuion equal to 12 bits  */
  ADC_InitStruct.ADC_Resolution = ADC_Resolution_12b;
  ADC_InitStruct.ADC_ContinuousConvMode = ENABLE; 
  ADC_InitStruct.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;
  ADC_InitStruct.ADC_DataAlign = ADC_DataAlign_Right;
  ADC_InitStruct.ADC_ScanDirection = ADC_ScanDirection_Backward;
  ADC_Init(ADC1, &ADC_InitStruct); 
 
//   /* Convert the ADC_Channel_0 sensor  with 55.5 Cycles as sampling time */ 
  ADC_ChannelConfig(ADC1, ADC_Channel_0 , ADC_SampleTime_55_5Cycles);  
  
  /* Convert the ADC1 Vref  with 55.5 Cycles as sampling time */ 
  ADC_ChannelConfig(ADC1, ADC_Channel_1  , ADC_SampleTime_55_5Cycles); 
  
  /* ADC Calibration */
  ADC_GetCalibrationFactor(ADC1);
  ADC_DMACmd(ADC1, ENABLE);
  /* Enable ADC1 */
  ADC_Cmd(ADC1, ENABLE);     
  
  /* Wait the ADCEN falg */
  while(!ADC_GetFlagStatus(ADC1, ADC_FLAG_ADEN)); 
  /* ADC1 regular Software Start Conv */ 
  ADC_StartOfConversion(ADC1);
}
 
//取得AD值
u16 GetADValue(u8 CHSeclect)
{ 
    DMA_ClearFlag(DMA1_FLAG_TC1);
    if(CHSeclect==0)
    return RegularConvData_Tab[0]; 
    else
        return RegularConvData_Tab[1]; 
}

[ARM] STM32F0 Discovery ADC problem

bulanik.mantik

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bulanik.mantik

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PA3040

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bulanik.mantik

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PA3040

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bigdogguru

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bulanik.mantik

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bigdogguru

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bulanik.mantik

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Realy

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