stm32 learning nine

Mainly the writing of adc.h and adc.c files (written as add.h and add.c during the experiment)

After debugging for a whole morning, I found that the clock was set wrongly. RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC|RCC_APB2Periph_ADC1,ENABLE);

It is set to APB1, so only 0v can appear. Beware! ! !

The add.h code is as follows:

#ifndef _ADD_H
#define _ADD_H

#include "stm32f10x.h"

void ADC_Configure();

#endif

The add.c code is as follows:

#include "add.h"
#define ADC1_DR_Address ((u32)0x40012400 + 0x4C)

__IO uint16_t ADC_ConvertedValue;

static void ADC_GPIO_Config()
{
  
 GPIO_InitTypeDef GPIO_InitStructure;

 RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1 ,ENABLE);
 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC|RCC_APB2Periph_ADC1,ENABLE);

 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
 GPIO_InitStructure.GPIO_Pin =  GPIO_Pin_1;
    GPIO_Init(GPIOC,&GPIO_InitStructure);

}
static void ADC_DMA_Config()
{
 ADC_InitTypeDef ADC_InitStructure;
 DMA_InitTypeDef  DMA_InitStructure;

 DMA_DeInit(DMA1_Channel1);
 DMA_InitStructure.DMA_BufferSize = 1; 
 DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
 DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
 DMA_InitStructure.DMA_MemoryBaseAddr = (u32)&ADC_ConvertedValue;
 DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
 DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Disable;
 DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
 DMA_InitStructure.DMA_PeripheralBaseAddr = ADC1_DR_Address;
 DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
 DMA_InitStructure.DMA_PeripheralInc =  DMA_PeripheralInc_Disable;
 DMA_InitStructure.DMA_Priority = DMA_Priority_High;
 DMA_Init(DMA1_Channel1,&DMA_InitStructure);
 DMA_Cmd(DMA1_Channel1, ENABLE);
 
 ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
 ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
 ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
    ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
 ADC_InitStructure.ADC_NbrOfChannel = 1;
 ADC_InitStructure.ADC_ScanConvMode = DISABLE;
 ADC_Init(ADC1,&ADC_InitStructure);

 
 RCC_ADCCLKConfig(RCC_PCLK2_Div8);
 ADC_RegularChannelConfig(ADC1,ADC_Channel_11,1,ADC_SampleTime_55Cycles5);

    ADC_DMACmd(ADC1,ENABLE);
 ADC_Cmd(ADC1,ENABLE);

 ADC_ResetCalibration(ADC1);
 while(ADC_GetResetCalibrationStatus(ADC1));

 ADC_StartCalibration(ADC1);
 while(ADC_GetCalibrationStatus(ADC1));

 ADC_SoftwareStartConvCmd(ADC1,ENABLE);
}

void ADC_Configure()
{
 ADC_GPIO_Config();
 ADC_DMA_Config();
}

The usart.h code is as follows:

#ifndef _USART_H
#define _USAET_H
#include
void Usart_GPIO_Config(void);
int fputc(int ch,FILE *f);

#endif

The usart.c code is as follows:

#include "usart.h"
#include "stm32f10x.h"

void Usart_GPIO_Config()
{
 USART_InitTypeDef USART_InitStructure;
 GPIO_InitTypeDef GPIO_InitStructure;
 
 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_USART1,ENABLE);
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOA,&GPIO_InitStructure);

 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
 GPIO_Init(GPIOA,&GPIO_InitStructure); //Note that this must be added for unclear reasons

 USART_InitStructure.USART_BaudRate = 115200;
 USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None; 
 USART_InitStructure.USART_Mode = USART_Mode_Tx|USART_Mode_Rx;
    USART_InitStructure.USART_Parity = USART_Parity_No;
 USART_InitStructure.USART_StopBits = USART_StopBits_1;
 USART_InitStructure.USART_WordLength = USART_WordLength_8b;
 USART_Init(USART1,&USART_InitStructure);
    USART_Cmd(USART1,ENABLE);
}

int fputc(int ch,FILE *f)
{
   USART_SendData(USART1,(unsigned char)ch);
   while(!(USART1->SR & USART_FLAG_TXE));
   return ch;
}

The main.c code is as follows:

/******************** (C) COPYRIGHT 2013 ******************************
 * File name: main.c
 * Description: Project template built with version 3.5.0.         
 * Experimental platform: WildFire STM32 development board
 * Library version: ST3.5.0
 *
 
 * Version: v1.0
**********************************************************************************/
#include "stm32f10x.h"
#include "add.h"  
#include "usart.h"
void delay(__IO uint32_t count);

extern __IO uint16_t ADC_ConvertedValue;

float ADC_ConvertedValueLocal;

/* 
 * Function name: main
 * Description: Main function
 * Input: None
 * Output: None
 */
int main(void)
{
   Usart_GPIO_Config();
   ADC_Configure();        
  
     while(1)
   {
      ADC_ConvertedValueLocal =(float) ADC_ConvertedValue/4096*3.3; // Read the converted AD value
 
   printf("\r\n The current AD value = 0x%04X \r\n", ADC_ConvertedValue); 
   printf("\r\n The current AD value = %f V \r\n",ADC_ConvertedValueLocal); 
   delay(0x01fffff0);

   }
   // add your code here ^_^。
}
/******************* (C) COPYRIGHT 2013 *****END OF FILE************/
void delay(__IO uint32_t count)
{
 for(;count>0;count--);
}