基于51单片机的简易波形发生器仿真设计资料 包含源程序及仿真文件

#include <AT89X52.h> #include <math.h> #define ADDR1 0x2c //MAX5820LEUA sbit key_sin=P1^0; sbit key_tran=P1^2; sbit key_tooth=P1^4; sbit SCL = P2 ^ 0; sbit SDA = P2 ^ 1; unsigned char code sin[256]= //正弦表 { 0x80,0x83,0x86,0x89,0x8d,0x90,0x93,0x96,0x99,0x9c,0x9f,0xa2,0xa5,0xa8,0xab,0xae,0xb1,0xb4,0xb7,0xba,0xbc,0xbf,0xc2,0xc5, 0xc7,0xca,0xcc,0xcf,0xd1,0xd4,0xd6,0xd8,0xda,0xdd,0xdf,0xe1,0xe3,0xe5,0xe7,0xe9,0xea,0xec,0xee,0xef,0xf1,0xf2,0xf4,0xf5, 0xf6,0xf7,0xf8,0xf9,0xfa,0xfb,0xfc,0xfd,0xfd,0xfe,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xfe,0xfd, 0xfd,0xfc,0xfb,0xfa,0xf9,0xf8,0xf7,0xf6,0xf5,0xf4,0xf2,0xf1,0xef,0xee,0xec,0xea,0xe9,0xe7,0xe5,0xe3,0xe1,0xde,0xdd,0xda, 0xd8,0xd6,0xd4,0xd1,0xcf,0xcc,0xca,0xc7,0xc5,0xc2,0xbf,0xbc,0xba,0xb7,0xb4,0xb1,0xae,0xab,0xa8,0xa5,0xa2,0x9f,0x9c,0x99, 0x96,0x93,0x90,0x8d,0x89,0x86,0x83,0x80,0x80,0x7c,0x79,0x76,0x72,0x6f,0x6c,0x69,0x66,0x63,0x60,0x5d,0x5a,0x57,0x55,0x51, 0x4e,0x4c,0x48,0x45,0x43,0x40,0x3d,0x3a,0x38,0x35,0x33,0x30,0x2e,0x2b,0x29,0x27,0x25,0x22,0x20,0x1e,0x1c,0x1a,0x18,0x16, 0x15,0x13,0x11,0x10,0x0e,0x0d,0x0b,0x0a,0x09,0x08,0x07,0x06,0x05,0x04,0x03,0x02,0x02,0x01,0x00,0x00,0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x02,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0a,0x0b,0x0d,0x0e,0x10,0x11,0x13,0x15, 0x16,0x18,0x1a,0x1c,0x1e,0x20,0x22,0x25,0x27,0x29,0x2b,0x2e,0x30,0x33,0x35,0x38,0x3a,0x3d,0x40,0x43,0x45,0x48,0x4c,0x4e, 0x51,0x55,0x57,0x5a,0x5d,0x60,0x63,0x66,0x69,0x6c,0x6f,0x72,0x76,0x79,0x7c,0x80 }; bit write_addr(unsigned char,bit);//第一个参数表示地址，第二个参数表示 读：1 写：0 bit write_data(unsigned char);//第一个参数表示数据，第二个参数表示 命令字 void stop(); void Delay(unsigned int); I2C_Delay(unsigned int I2C_VALUE) { while ( --I2C_VALUE!= 0 ); } /* 函数：I2C_Init() 功能：I2C 总线初始化，使总线处于空闲状态 说明：在 main()函数的开始处，通常应当要执行一次本函数 */ void I2C_Init() { SCL = 1; I2C_Delay(5); SDA = 1; I2C_Delay(5); } /* 函数：I2C_Start() 功能：产生I2C 总线的起始状态 说明： SCL处于高电平期间，当SDA 出现下降沿时启动I2C 总线 不论 SDA 和SCL 处于什么电平状态，本函数总能正确产生起始状态 本函数也可以用来产生重复起始状态 本函数执行后，I2C 总线处于忙状态 */ void I2C_Start() { SDA = 1; I2C_Delay(5); SCL = 1; I2C_Delay(5); SDA = 0; I2C_Delay(5); SCL = 0; I2C_Delay(5); } /* 函数：I2C_Write() 功能：向I2C 总线写1 个字节的数据 参数： dat：要写到总线上的数据 */ void I2C_Write(char dat) { unsigned char t = 8; do { SDA = (bit)(dat & 0x80); dat <<= 1; SCL = 1; I2C_Delay(5); SCL = 0; I2C_Delay(5); } while ( --t != 0 ); } bit I2C_GetAck() { bit ack; SDA = 1; I2C_Delay(5); SCL = 1; I2C_Delay(5); ack = SDA; SCL = 0; I2C_Delay(5); return ack; } void I2C_Stop() { unsigned int t = 10; SDA = 0; I2C_Delay(5); SCL = 1; I2C_Delay(5); SDA = 1; I2C_Delay(5); while ( --t != 0 ); //在下一次产生Start 之前，要加一定的延时 } void Delay(unsigned int I2C_Delay_t) { while ( --I2C_Delay_t!= 0 ); } bit write_addr(unsigned char addr,bit mod) { unsigned char address; address=addr<<1; if(mod) address++; I2C_Start(); I2C_Write(address); Delay(10); if(I2C_GetAck()) return 1; return 0; } bit write_data(unsigned char dat) { I2C_Write(dat); if(I2C_GetAck()) return 1; return 0; } void stop() { I2C_Stop(); I2C_Init(); } void main(void) { unsigned char i; loop: I2C_Init(); while(1) { if(key_sin==0) //产生正弦波 { while(1) { for(i=192;i<255;i++) { write_addr(ADDR1,0); write_data(0); write_data(sin[i]); stop(); if(!(key_tran!=0&&key_tooth!=0)) goto loop; } for(i=0;i<192;i++) { write_addr(ADDR1,0); write_data(0); write_data(sin[i]); stop(); if(!(key_tran!=0&&key_tooth!=0)) goto loop; } } } if(key_tran==0) //产生三角波 { while(1) { for(i=0;i<255;i++) { write_addr(ADDR1,0); write_data(0); write_data(i); stop(); if(!(key_sin!=0&&key_tooth!=0)) goto loop; } for(;i>0;i--) { write_addr(ADDR1,0); write_data(0); write_data(i); stop(); if(!(key_sin!=0&&key_tooth!=0)) goto loop; } } } if(key_tooth==0) //产生锯齿波 { while(1) { for(i=0;i<255;i++) { write_addr(ADDR1,0); write_data(0); write_data(i); stop(); if(!(key_tran!=0&&key_sin!=0)) goto loop; } } } } }