日志
STM32_ADC_TEST
程序說明：調節電位器R37輸出電壓，觀察LCD上顯示的數值
ADC工作模式配置:
ADC1 獨立模式,單次轉換
/* Includes ------------------------------------------------------------------*/
#include "stm32f10x.h"
#include "lcd.h"
#include "stdio.h"
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
uint32_t TimingDelay = 0;
uint8_t ADC_Flag;
/* Private function prototypes -----------------------------------------------*/
void Delay_Ms(uint32_t nTime);
void ADC_Config(void);
float Read_ADC(void);
/* Private functions ---------------------------------------------------------*/
/**
* @說明 主函數
* @參數 None
* @返回值 None
*/
int main(void)
{
float adc_temp;
uint8_t string[20]; //ADC結果
SysTick_Config(SystemCoreClock/1000); //1ms中斷一次
ADC_Config();
//LCD工作模式配置
STM3210B_LCD_Init();
LCD_Clear(White);
LCD_SetTextColor(White);
LCD_SetBackColor(Blue);
LCD_ClearLine(Line0);
LCD_ClearLine(Line1);
LCD_ClearLine(Line2);
LCD_ClearLine(Line3);
LCD_ClearLine(Line4);
LCD_DisplayStringLine(Line1," ADC DEMO ");
LCD_DisplayStringLine(Line3," PB0-ADC channel 8 ");
LCD_SetTextColor(Blue);
LCD_SetBackColor(White);
while(1){
//200毫秒掃描一次ADC
if(ADC_Flag){
ADC_Flag = 0;
adc_temp = Read_ADC();
sprintf(string,"%s%.3f","ADC Value:",adc_temp);
LCD_DisplayStringLine(Line7,string);
}
}
}
/**
* @說明 ADC時鐘源及工作模式配置
* @參數 none
* @返回值 None
*/
void ADC_Config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
ADC_InitTypeDef ADC_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);
//PB0-ADC channel 8
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
GPIO_Init(GPIOB, &GPIO_InitStructure);
// ADC1 工作模式配置
ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
ADC_InitStructure.ADC_ScanConvMode = DISABLE;
ADC_InitStructure.ADC_ContinuousConvMode = DISABLE; //單次轉換
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStructure.ADC_NbrOfChannel = 1;
ADC_Init(ADC1, &ADC_InitStructure);
ADC_RegularChannelConfig(ADC1, ADC_Channel_8, 1, ADC_SampleTime_13Cycles5);
ADC_Cmd(ADC1, ENABLE);
ADC_ResetCalibration(ADC1);
/* Check the end of ADC1 reset calibration register */
while(ADC_GetResetCalibrationStatus(ADC1));
ADC_StartCalibration(ADC1);
/* Check the end of ADC1 calibration */
while(ADC_GetCalibrationStatus(ADC1));
}
/**
* @說明 讀取ADC轉換結果
* @參數 none
* @返回值 ADC_VALUE:ADC轉換結果
*/
float Read_ADC(void)
{
float ADC_VALUE;
ADC_SoftwareStartConvCmd(ADC1,ENABLE);
Delay_Ms(5);
ADC_VALUE = ADC_GetConversionValue(ADC1)*3.30/0xfff;
return ADC_VALUE;
}
/**
* @說明 延時函數
* @參數 nTime: 延時時間
* @返回值 None
*/
void Delay_Ms(uint32_t nTime)
{
TimingDelay = nTime;
while(TimingDelay != 0);
}
/******************************************END OF FILE*************************/
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