Cepark电子园 AVR M16实验之十一 片内AD

/**********************************************************************
* 文件名称: main.c
* 程序作者: kidcao1987
* 程序版本: V1.0
* 功能描述: 接上串口，打开串口调试助手。在上面循环显示：
“当前电压值： 伏

天上掉下一个大南瓜！！！
作者：kidcao1987 QQ：289718970
”
* 编译器：WinAVR-20090313
* 芯片：ATmega16,外部11.0592MHZ晶振
* 技术支持：
**********************************************************************/
#include
#include

#define BAUD 9600

unsigned int uiResult; //转换结果
float fVoltage; //
unsigned char const ucStr1[]={"当前电压值："};
unsigned char const ucStr2[]={""};
unsigned char const ucStr3[]={"天上掉下一个大南瓜！！！"};
unsigned char const ucStr4[]={"作者：kidcao1987 QQ：289718970"};
unsigned char const ucStr5[]={"伏"};


unsigned int GetADCData(void); //获取ADC的数值
void ADCInit(void); //ADC初始化


void USARTInit(void); //初始化
void USARTTransmitData(unsigned char); //发送数据
void USARTTransmitString(unsigned char const *pStr); //发送字符串
void USARTTransmitString1(unsigned char const *pStr); //发送字符串


int main(void)
{
PORTD = 0x03;
DDRD = 0x02; //PD0输入 PD1输出

PORTA = 0x00;
DDRA = 0xFE;//设置为输出,PA0为输入端，设置为输入，高阻态

USARTInit(); //串口初始化
ADCInit();

while(1)
{
uiResult = GetADCData();
fVoltage = (float)(uiResult)/1024*500;
uiResult = (unsigned int)(fVoltage); //电压值转换成显示值

USARTTransmitString1(ucStr1);
USARTTransmitData((unsigned char)(uiResult/100) + 48);
USARTTransmitData('.');
USARTTransmitData((unsigned char)(uiResult%100/10) + 48);
USARTTransmitData((unsigned char)(uiResult%10) + 48);
USARTTransmitString1(ucStr5);
USARTTransmitData(0x0d);
USARTTransmitData(0x0a); //回车换行
USARTTransmitString(ucStr2);
USARTTransmitString(ucStr3);
USARTTransmitString(ucStr4);
USARTTransmitData(0x0d);
USARTTransmitData(0x0a); //回车换行
USARTTransmitData(0x0d);
USARTTransmitData(0x0a); //回车换行
_delay_ms(1000);
}
}

unsigned int GetADCData(void)
{
ADCSRA |= (1<while(!(ADCSRA & (1<ADCSRA |= (1<
return ADC;
}

void ADCInit(void)
{
ADMUX = (1<ADCSRA = (1<}


void USARTInit(void) //初始化
{
UCSRA = 0X00;
UCSRC |= (1<UBRRL = (11059200 / BAUD / 16 - 1) % 256; //波特率设置为9600
UBRRH = (11059200 / BAUD / 16 - 1) / 256;
UCSRB |= (1 << RXCIE) | (1 << RXEN) | (1 << TXEN); //接收中断使能，接收使能，发送使能
}




void USARTTransmitData(unsigned char ucTransmitData)
{
while(!(UCSRA & (1<
UDR = ucTransmitData; //发送
}



void USARTTransmitString(const unsigned char* pStr)
{
while(*pStr != '\0')
{
USARTTransmitData(*pStr++);
}
USARTTransmitData(0x0d);
USARTTransmitData(0x0a);
}



void USARTTransmitString1(const unsigned char* pStr)
{
while(*pStr != '\0')
{
USARTTransmitData(*pStr++);
}

}

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