PWM.rar_4 3 2 1_PWM 串口_stc11F04E_stc11f04e pwm_stc模拟pwm

#include "reg51.h" #include "intrins.h" typedef unsigned char BYTE; typedef unsigned int WORD; #define FOSC 6000000L //System frequency #define BAUD 9600 //UART baudrate BYTE RXDATA; BYTE COUNT=0; BYTE OC[8]={128,128,128,128,128,128,128,128}; sbit PWM1 = P3^7; sbit PWM2 = P1^0; sbit PWM3 = P1^1; sbit PWM4 = P1^2; sbit PWM5 = P1^5; sbit PWM6 = P1^6; sbit PWM7 = P1^7; BYTE RX_BUFFER[8]={0}; void SendData(BYTE dat); void SendString(char *s); bit busy; void delay() { unsigned int i=0; for(i=0;i<65535;i++) i=i; } void main() { /* SCON = 0x50; //8-bit variable UART TMOD = 0x20; //Set Timer1 as 8-bit auto reload mode TH1 = TL1 = -(FOSC/12/32/BAUD); //Set auto-reload vaule TR1 = 1; //Timer1 start run ES = 1; //Enable UART interrupt EA = 1; //Open master interrupt switch */ TMOD = 0x20; // 定时器1工作于8位自动重载模式, 用于产生波特率 //TH1=(unsigned char)(256 - (FOSC / (32L * 12L * BAUD))); //TL1=(unsigned char)(256 - (FOSC / (32L * 12L * BAUD))); // 定时器0赋初值 //TH1=253; // TL1=253; TH1=0XE6; TL1=0XE6; SCON = 0x50; PCON = 0x80; TR1 = 1; ES = 1; //Enable UART interrupt EA = 1; //Open master interrupt switch delay(); SendString("ARE YOU OK?"); //SendData('A') ; while(1) { COUNT++; if(COUNT==255) COUNT=0; if(OC[0]>COUNT) PWM1=1;else PWM1=0; if(OC[1]>COUNT) PWM2=1;else PWM2=0; if(OC[2]>COUNT) PWM3=1;else PWM3=0; if(OC[3]>COUNT) PWM4=1;else PWM4=0; if(OC[4]>COUNT) PWM5=1;else PWM5=0; if(OC[5]>COUNT) PWM6=1;else PWM6=0; if(OC[6]>COUNT) PWM7=1;else PWM7=0; if(busy==0) { busy=1; SendData(OC[RX_BUFFER[4]-'0']/100+'0'); SendData(OC[RX_BUFFER[4]-'0']%100/10+'0'); SendData(OC[RX_BUFFER[4]-'0']%10+'0'); } } } /*---------------------------- UART interrupt service routine ----------------------------*/ BYTE TMP1=0; bit txbusy=0; void Uart_Isr() interrupt 4 using 1 { if (RI) { RI = 0; //Clear receive interrupt flag RXDATA = SBUF; //P0 show UART data for(TMP1=7;TMP1>0;TMP1--) RX_BUFFER[TMP1]=RX_BUFFER[TMP1-1]; RX_BUFFER[TMP1]=RXDATA; if(RX_BUFFER[7]=='P'&&RX_BUFFER[6]=='W'&&RX_BUFFER[5]=='M'&&RX_BUFFER[3]=='=') { OC[RX_BUFFER[4]-'0']=(RX_BUFFER[2]-'0')*100+(RX_BUFFER[1]-'0')*10+(RX_BUFFER[0]-'0'); busy=0;} else busy=1; // SendData(RXDATA); // bit9 = RB8; //P2.2 show parity bit } if (TI) { TI = 0; //Clear transmit interrupt flag txbusy=0; } } /*---------------------------- Send a byte data to UART Input: dat (data to be sent) Output:None ----------------------------*/ void SendData(BYTE dat) { txbusy=1; SBUF=dat; while(txbusy); } /*---------------------------- Send a string to UART Input: s (address of string) Output:None ----------------------------*/ void SendString(char *s) { while (*s) //Check the end of the string { SendData(*s++); //Send current char and increment string ptr } }