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//---------------------------------------------------------------------
#include <C8051F020.h>
#include "stdio.h"
sfr16 TMR3RL = 0x92; //定時器3重裝載寄存器
sfr16 TMR3 = 0x94; //定時器3計數器
sfr16 DP =0x82;
sfr16 ADC0 =0xbe;
sfr16 ADC0GT =0xc4;
sfr16 ADCOLT =0xc6;
sfr16 RCAP2 =0xca;
sfr16 T2 =0xcc;
sfr16 RCAP4 =0xe4;
sfr16 T4 =0xf4;
sfr16 DAC0 =0xd2;
sfr16 DAC1 =0xd5;
#define uchar unsigned char
#define uint unsigned int
//----------------------------------------------------------------------
//參數設置區
//----------------------------------------------------------------------
#define BAUDRATE 9600 //波特率bps
#define SYSCLK 11059200 //外部晶振,修改也要修改OSCXCN
#define SMODVAL 0 //SMOD的值,修改請也修改PCONVAL
#define PCONVAL 0x00 //PCON的值,=0x00時SMOD0=0; =0x80時SMOD0=1
#define TXVAL (256-SYSCLK*(SMODVAL+1)/BAUDRATE/384) //定時器初值
#define MAX_LEN 1//每次接收/發送字符串的長度
#define SAMPLERATE0 5000
#define NUM_SAMPLES 1
#define TURE 1
#define FALSE 0
//---------------------------------------------------------------------
//全局變量
//---------------------------------------------------------------------
sbit LED = P1^6; //LED '1'亮 '0'滅
bit readFlag = 0; //讀標志
uchar readCounts = 0; //已經讀取的字符個數,與MAX_LEN比較
uchar idATa trdATa[MAX_LEN]; //要接收/發送的字符串
xdATa unsigned samples[NUM_SAMPLES];
bit ADC0_DONE;
//----------------------------------------------------------------------
//子函數聲明
//----------------------------------------------------------------------
void SYSCLK_Init(void); //系統時鐘初始化
void PORT_Init(void); //端口初始化
void UART0_Init(void); //串口UART0初始化
void Send_Char(uchar ch); //發送單個字符
void Send_String(uchar * str, uint len); //發送一個字符串
void UART0_ISR(); //串口中斷服務程序,接收字符
void Timer3_Init(uint counts); //定時器3初始化
void Timer3_ISR(void); //定時器3中斷服務程序
void ADC0_Init (void);
//----------------------------------------------------------------------
//主函數
//----------------------------------------------------------------------
void main(void)
{unsigned short i;
floAT temp,k;
WDTCN = 0xde; //禁止看門狗
WDTCN = 0xad;
P6&=0x02;
here:
i=0;
SYSCLK_Init(); //時鐘初始化
PORT_Init(); //端口初始化
UART0_Init(); //串口初始化
Timer3_Init(SYSCLK/12/10); //定時器初始化
EA = 1; //開全局中斷
ADC0_Init();
AD0INT=0;
AD0BUSY=1;
while(AD0INT==0);
temp=ADC0;
k=(temp*2.4)/4096;
printf("\n");
printf("voltage%f",k);
printf("\n");
i=0;
while(1)
{
{if(readFlag) //已經讀取
{
readFlag = 0; //清零
Send_String(trdATa,MAX_LEN); //發送字符串
i++;
if(i==10000){goto here;}
}
}
}}
//----------------------------------------------------------------------
//子函數具體實現
//----------------------------------------------------------------------
//系統時鐘初始化
void SYSCLK_Init(void)
{
uint i;
OSCXCN = 0x67; //采用外部晶振22.1184MHz,不分頻. 選型OSCXCN=0110,0111
for(i=0;i<256;i++); //等待>1ms
while(!(OSCXCN&0x80)); //查詢直到XTLVLD=1,晶振穩定
OSCICN = 0x88; //切換到外部振蕩器,允許時鐘失效監測器. OSCICN=1000,1000
}
//端口初始化
void PORT_Init(void)
{
XBR0 = 0x04; //允許UART0,RX,TX連到2個端口引腳. XBR0=0000,0100
XBR1 = 0x00;
XBR2 = 0x40; //交*開關使能
P0MDOUT |= 0x03; //P0.0為推拉方式輸出,即TX0,RX0所在的端口 0000,0011
P1MDOUT |=0x40; //P1.6為推拉方式輸出,即LED所在的端口 0100,0000
}
//串口初始化
void UART0_Init(void)
{
SCON0=0x50;
TMOD=0x20;
TH1=-(SYSCLK/BAUDRATE/16);
TR1=1;
CKCON|=0x10;
PCON|=0x80;
TI0=1;
TR0 = 1;
ES0 =1; //UART0中斷開啟 ADC時候要屏蔽
TR1 = 1; //啟動定時器T1
}
//定時器初始化
void Timer3_Init(uint counts)
{
TMR3CN = 0x00; //禁止定時器T3,清TF3,采用SYSCLK/12為時基
TMR3RL = -counts; //初始化重裝載值
TMR3 = 0xffff; //設置為立即重裝載
EIE2 |= 0x01; //T3中斷開啟
TMR3CN |= 0x04; //啟動T3
}
//發送單個字符
void Send_Char(uchar ch)
{
SBUF0 = ch; //送入緩沖區1
while(TI0 == 0); //等待發送完畢
TI0 = 0; //軟件清零
}
//發送字符串,調用Send_Char() len字符串長度
void Send_String(uchar * str,uint len)
{
uint k = 0;
do
{
Send_Char(*(str + k));
k++;
} while(k < len);
}
//定時器3中斷服務程序
void Timer3_ISR(void) interrupt 14 using 0
{
TMR3CN &= ~(0x80); //清TF3
LED = ~LED;
}
//UART0中斷服務程序. 接收字符
void UART0_ISR(void) interrupt 4 using 1
{
uchar rxch;
if(RI0) //中斷標志 RI0=1 數據完整接收
{
RI0 = 0; //軟件清零
rxch = SBUF0; //讀緩沖
if(readCounts>=MAX_LEN)
{
readCounts = 0;
readFlag = 1;
}
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