是pic单片机做的完整代码和仿真文件下载地址：http://www.51hei.com/bbs/dpj-26880-1.html 可以产生spwm波形 #include "main.h"
#include "pic16f716.h" #define _BV(N) (1<<N) void Port_Init(void) { set_tris_b(0x00); } void T2PWM_OutPut(unsigned int16 t2_pwm) { unsigned int8 value = 0; T2C &= ~_BV(2); value = 1CON; value |= (unsigned int8)((t2_pwm&0x03)<<4); CCP1CON = value; CCPR1L = (unsigned int8)(t2_pwm>>2); T2CON |= _BV(2); } void PWM_Init(void) { PWM1CON = 0b01100100; #if 0 setup_ccp1(CCP_PWM); setup_timer_2(T2_DIV_BY_4,127,1); set_pwm1_duty(408); #else SB = 0x00; PR2 = 249; CCP1CON = 0b10001110; //CCPR1L = 0x00; T2PWM_OutPut(512); TMR2 = 0x00; TMR2IF = 0; T2CON = 0b00000101; while(TMR2IF==0); TRISB = 0x00; /* TRISB = 0xFF; PR2 = 249; CCP1CON = 0b00001100; //CCPR1L = 0x00; T2PWM_OutPut(512); TMR2 = 0x00; TMR2IF = 0; T2CON = 0b00000101; while(TMR2IF==0); TRISB = 0x00; */ #endif } void main(void) { Port_Init(); PWM_Init(); //for(;;) while (TRUE) { //output_b(0x55); delay_ms(200); //output_b(0xaa); delay_ms(200); } } -电子元器件采购网（www.ruidan.com）是本土元器件目录分销商，采用“小批量、现货、样品”销售模式，致力于满足客户多型号、高质量、快速交付的采购需求。 自建高效智能仓储，拥有自营库存超过50,000种，提供一站式正品现货采购、个性化解决方案、选型替代等多元化服务。