51单片机 串行数模转换TLC5615

#define uint unsigned int #define uchar unsigned char

#define INBUF_LEN 6 //数据长度

unsigned char inbuf1[INBUF_LEN]={'0','0','0','0','0','0'};//发送缓冲区 unsigned char code table[] = {0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0x88,0x83,0xc6,0xa1,0x86,0x8e};//共阳数码管显示0~F

unsigned char code dis_8[12]={'0','1','2','3','4','5','6','7','8','9',' ','-'}; sbit CS=P2^5; //定义片选信号IO口 sbit SCLK=P2^4; //定义时钟信号IO口 sbit DIN=P2^3; //定义数据输入IO口 uint temp;

void init_serialcomm( void ) {

SCON = 0x50 ; //SCON: serail mode 1, 8-bit UART, enable ucvr T2CON=0x30; TH2=0x00; TL2=0x00;

RCAP2H=0xFF; RCAP2L=0xDC; TR2=1; }

//向串口发送一个字符

void send_char_com( unsigned char ch) {

SBUF=ch;

while (TI== 0 ); TI= 0 ; }

//向串口发送一个字符串，strlen 为该字符串长度

void send_string_com( unsigned char *str, unsigned int strlen) {

unsigned int k= 0 ; do {

send_char_com(*(str + k)); k++;

} while (k < strlen); }

void delay(uint k) //延时函数 {

uint i,j; for(i=0;ivoid DAConvert(uint Data){ uchar i; Data<<=6; CS=0; SCLK=0;

for (i=0;i<12;i++){

DIN=(bit)(Data&0x8000); SCLK=1; Data<<=1; SCLK=0; }

CS=1; SCLK=0;

for (i=0;i<12;i++); }

//定时器0中断处理中键扫描和显示

void KeyAndDis_Time0(void) interrupt 1 using 2 {

TH0=0xdc;

TL0=0x00;//设定时值为10ms P0= table[ temp/1000]; P2=0x03; delay(2);

P0= table[ (temp%1000)/100]; P2=0x02; delay(2);

P0= table[ (temp%100)/10]; P2=0x01; delay(2);

P0= table[ temp%10]; P2=0x00; delay(2); }

//主程序 main(){

uint i;

init_serialcomm(); //初始化串口 EA = 1; //允许CPU中断 ET0 = 1; //定时器0中断打开 TMOD = 0x01; //设定时器0为模式1，16位模式 TH0=0xdc; TL0=0x00; //设定时值为10ms TR0 = 1; while(1){

for(i=0;i<1023;i+=2){ DAConvert(i);//启动转换 temp=i;

inbuf1[0]=dis_8[temp/1000];

inbuf1[1]=dis_8[(temp%1000)/100]; inbuf1[2]=dis_8[(temp%100)/10]; inbuf1[3]=dis_8[temp%10]; inbuf1[4]=0x0d; inbuf1[5]=0x0a;

send_string_com(inbuf1,INBUF_LEN);//串口输出到上位机 delay(10); }

for(i=1023;i>2;i-=2){ DAConvert(i);//启动转换 temp=i;

inbuf1[0]=dis_8[temp/1000];

inbuf1[1]=dis_8[(temp%1000)/100]; inbuf1[2]=dis_8[(temp%100)/10]; inbuf1[3]=dis_8[temp%10]; inbuf1[4]=0x0d; inbuf1[5]=0x0a;

send_string_com(inbuf1,INBUF_LEN); delay(10); } } }