pwm.c

最新1211单片机的PWM源程序代码

#include	<REG1210.H>
#include	<intrins.h>
#include 	<stdio.h>
#include	"ISD51.H"
#include    "ROM.H"
#define		XTAL	11059200
#define		BAUDRATE	9600
#define		T2RELOAD	(65536-(XTAL/32/BAUDRATE))
sbit		GreenLed = P2^4;
void delay(void){
  unsigned long s;

  s =0x0f000;
  while(s--);
}

void main(void) {
//Config ISD
  T2CON   = 0x34;        // Use Timer 2 as baudrate generator
  RCAP2H  = 0xFF;
  RCAP2H  = (T2RELOAD >> 8);    // baudrate reload factor
  RCAP2L  = T2RELOAD;

  SCON0   = 0x50;        // enable serial uart & receiver
  PCON   |= 0x80;        // double baudrate for UART0
  P3DDRL &= 0xF0;        // P3DDRL set port pins of UART0 to input/strong drive output
  P3DDRL |= 0x07;        // P3DDRL set port pins of UART0 to input/strong drive output 


  USEC   = ((XTAL+500000)/1000000)-1; // USEC timer factor
  ONEMS  = (XTAL/1000)-1;             // (MSECH+MSCL) MS Timer counting at 1.0ms

  HMSEC  = 100-1;         // Hundred MS Timer to 100.0ms
  SECINT = (10-1) | 0x80; // SECINT= 10 * HMS Timer Rate = 1 sec
                          // '0x80' will set the MSB for write immediate
  MSINT  = (10-1) | 0x80; // MSINT = 10ms for Tone period time base
  PDCON  = 0x1D;          // Powerup SysTimer

  FTCON  = 0xA5;          // setup flash programming times

  EICON  = 0x40;          //DIS enable all auxiliary interrupts

  EA = 1;                 //DIS Enable global interrupt flag

 ISDwait ();              // wait for connection to uVision2 Debugger
//Config 	PWM
  P3 = 0xFF	;			  //Config P3's PWM
  P3DDRL = 0x40;
  PDCON &= 0xED;		  //Turn on PWM	power
  PWMCON =0	;			  //Config period time
  PWM = 200;
  PWMCON = 0x10;		  //Config pwmduty
  PWM = 20;
  PWMCON = 0x01;		  //Select time speed using USEC,permit pwm function
  while (1) {
  	printf("Hello World\n");
  	PWMCON = 0x10;
  	PWM = 150 ;
  	PWMCON = 0x01;		  //Select time speed using USEC,permit pwm function
  	delay();
  	PWMCON = 0x10;
  	GreenLed = 0;		  //调试指示灯
  	PWM = 10;
  	PWMCON = 0x01;		  //Select time speed using USEC,permit pwm function		  
  	delay();
  	GreenLed = 1;
  }
}