#include "stm32f10x.h"
void Delay(unsigned int x);//延时
void GPIO_Configuration(void);//IO口配置
void UART_Init(void); //串口初始化
void UART2_PutChar(u8 ch); //串口发送数据
void ADC_Configuration(void); //ADC配置
void Read_ADC_Result(void); //ADC读取结果
int main(void)
{
SystemInit();
unsigned int t;
GPIO_Configuration();
UART_Init();
ADC_Configuration();
while(1)
{Read_ADC_Result();
for(t=0;t<100;t++)
{Delay(65530);}
}
}
void GPIO_Configuration(void)
{
GPIO_InitTypeDefGPIO_InitStructure;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_AFIO, ENABLE);
//GPIO_PinRemapConfig(GPIO_PartialRemap_USART3,ENABLE);
GPIO_InitStructure.GPIO_Pin =GPIO_Pin_2;
GPIO_InitStructure.GPIO_Mode =GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed= GPIO_Speed_50MHz;
GPIO_Init(GPIOA,&GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin =GPIO_Pin_3;
GPIO_InitStructure.GPIO_Mode =GPIO_Mode_IN_FLOATING;
GPIO_InitStructure.GPIO_Speed= GPIO_Speed_50MHz;
GPIO_Init(GPIOA,&GPIO_InitStructure);
}
void UART_Init(void)
{
USART_InitTypeDefUSART_InitStructure;
USART_InitStructure.USART_BaudRate = 9600;
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);
// USART_ITConfig(USART2,USART_IT_TXE, ENABLE);
USART_Cmd(USART2,ENABLE);
}
void UART2_PutChar(u8 ch)
{
USART_SendData(USART2,ch);
while(USART_GetFlagStatus(USART2,USART_FLAG_TXE)== RESET);
}
void ADC_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure; //定义结构体
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC |RCC_APB2Periph_ADC1,ENABLE);//IO口使能设置
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0; //ADC输入管脚PC0
GPIO_InitStructure.GPIO_Mode =GPIO_Mode_AIN;//模拟输出
GPIO_InitStructure.GPIO_Speed =GPIO_Speed_50MHz;
GPIO_Init(GPIOC, &GPIO_InitStructure);
ADC_InitTypeDef ADC_InitStructure;
ADC_DeInit(ADC1);
ADC_InitStructure.ADC_Mode =ADC_Mode_Independent;//工作在独立模式
ADC_InitStructure.ADC_ScanConvMode =DISABLE;//工作在单通道模式
ADC_InitStructure.ADC_ContinuousConvMode =ENABLE;//单次模式
ADC_InitStructure.ADC_ExternalTrigConv =ADC_ExternalTrigConv_None;//转换由软件而不是外部触发启动
ADC_InitStructure.ADC_DataAlign =ADC_DataAlign_Right;//数据右对齐
ADC_InitStructure.ADC_NbrOfChannel =1;//通道数目
ADC_Init(ADC1,&ADC_InitStructure);
ADC_RegularChannelConfig(ADC1,ADC_Channel_10,1,ADC_SampleTime_239Cycles5);//使用ADC1的通道10，采样顺序为1，采样周期为239.5周期
ADC_Cmd(ADC1,ENABLE);//使能ADC1
ADC_ResetCalibration(ADC1);//重置校准ADC1寄存器
while(ADC_GetResetCalibrationStatus(ADC1));//获取ADC重置校准寄存器的状态
ADC_StartCalibration(ADC1);//开始ADC1的校准状态
while(ADC_GetCalibrationStatus(ADC1));//等待校准完成
ADC_SoftwareStartConvCmd(ADC1,ENABLE);//使能ADC1的软件转换启动功能
}
void Read_ADC_Result()
{
unsigned chari,a,b,c,d;
unsigned short result;
for(i=0;i<8;i++)
{
ADC_SoftwareStartConvCmd(ADC1,ENABLE);//启动转换
while(!ADC_GetFlagStatus(ADC1,ADC_FLAG_EOC));//等待转换结束
result += ADC_GetConversionValue(ADC1);
}
result = result >>3;
result = (unsignedint)(((unsigned long)result)*3300>>12);//转换为数字电压值
a = result/1000;
b =(result-a*1000)/100;
c =(result-a*1000-b*100)/10;
d =(result-a*1000-b*100-c*10);
UART2_PutChar(0x56);//'v'
UART2_PutChar(0X3D);//"="
UART2_PutChar(a+48);
UART2_PutChar(0x2e);//"."
UART2_PutChar(b+48);
UART2_PutChar(c+48);
UART2_PutChar(d+48);
UART2_PutChar(0x20);//"_"空格
}
void Delay(unsigned int x)
{
unsigned int t;
t=x;
while(t--);
}
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