bulanik.mantik
Newbie level 4
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.
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++);
}
}
i hope you will have a change to look it. 