IIC-24C04与蜂鸣器

#include <reg52.h> #include <intrins.h> #define uchar unsigned char #define uint unsigned int #define NOP4() {_nop_();_nop_();_nop_();_nop_();} sbit SCL = P1^0; sbit SDA = P1^1; sbit SPK = P3^0; uchar code HI_LIST[] = { 0,226,229,232,233,236,238,240,241,242,245,246,247,248 }; uchar code LO_LIST[] = { 0,4,13,10,20,3,8,6,2,23,5,26,1,4,3 }; uchar code Song_24C04[] = { 1,2,3,1,1,2,3,1,3,4,5,3,4,5 }; uchar sidx; void DelayMS(uint x) { uchar t; while(x--) { for(t=120;t>0;t--); } } void Start() { SDA=1;SCL=1;NOP4();SDA=0;NOP4();SCL=0; } void Stop() { SDA=0;SCL=0;NOP4();SCL=1;NOP4();SDA=1; } void RACK() { SDA=1;NOP4();SCL=1;NOP4();SCL=0; } void NO_ACK() { SDA=1;SCL=1;NOP4();SCL=0;SDA=0; } void Write_A_Byte(uchar b) { uchar i; for(i=0;i<8;i++) { b<<=1;SDA=CY;_nop_();SCL=1;NOP4();SCL=0; } RACK(); } void Write_IIC(uchar addr,uchar dat) { Start(); Write_A_Byte(0xa0); Write_A_Byte(addr); Write_A_Byte(dat); Stop(); DelayMS(10); } uchar Read_A_Byte() { uchar i,b; for(i=0;i<8;i++) { SCL=1;b<<=1;B|=SDA;SCL=0; } return b; } uchar Read_Current() { uchar d; Start(); Write_A_Byte(0xa1); d=Read_A_Byte(); NO_ACK(); Stop(); return d; } uchar Random_Read(uchar addr) { Start(); Write_A_Byte(0xa0); Write_A_Byte(addr); Stop(); return Read_Current(); } void T0_INT() interrupt 1 { SPK=!SPK; TH0=HI_LIST[sidx]; TL0=LO_LIST[sidx]; } void main() { uchar i; IE=0x82; TMOD=0x00; for(i=0;i<14;i++) { Write_IIC(i,Song_24C04[i]); } while(1) { for(i=0;i<14;i++) { sidx=Random_Read(i); TR0=1; DelayMS(300); } } }