单片机三角波c语言程序,三角波单独发生 单片机程序

//三角波发生程序

#include"reg51.h"

#include

#define I2CDelay()  {_nop_();_nop_();_nop_();_nop_();}

sbit I2C_SCL = P3^7;

sbit I2C_SDA = P3^6;

sbit p_out=P1^0;

unsigned char code triwave[]={0,16,32,48,64,80,96,112,

128,144,160,176,192,208,

224,240,255,240,224,208,

192,176,160,144,128,112,

96,80,64,48,32,16,};//三角波波表,选取32点

unsigned char *pwave;//波表指针

unsigned char T1RH = 1;

unsigned char T1RL = 1;

void I2CStart()  //产生总线起始信号

{

I2C_SDA = 1; //首先确保SDA、SCL都是高电平

I2C_SCL = 1;

I2CDelay();

I2C_SDA = 0; //先拉低SDA

I2CDelay();

I2C_SCL = 0; //再拉低SCL

}

void I2CStop()   //产生总线停止信号

{

I2C_SCL = 0; //首先确保SDA、SCL都是低电平

I2C_SDA = 0;

I2CDelay();

I2C_SCL