void start() {SDA=1;delay1us();SCL=1;delay1us();SDA=0;delay1us();SCL=0;}void end(){SDA=0;delay1us();SCL=1;delay1us();SDA=1;delay1us();}void respons(){uchar i;SCL=1;delay1us();outa=0;delay1us();while((SDA==1)&&(i<250))i++;SCL=0;delay1us();outa=1;delay1us();}void write_byte(uchar date){uchar i;for(i=0;i<8;i++){SCL=0;delay1us();if(date&0x80) SDA=1;else SDA=0;delay1us();SCL=1;delay1us();date<<=1; }SCL=0;delay1us();SDA=1;delay1us();}uchar read_byte(){ uchar i,k; SCL=0; delay1us(); SDA=1; delay1us(); outa=0; delay1us(); for(i=0;i<8;i++) { SCL=1; delay1us(); k=(k<<1)|SDA; SCL=0; delay1us(); } outa=1; return (k);} void write_add(uchar add,uchar date) { start(); write_byte(0x3a); respons(); write_byte(add); respons(); write_byte(date); respons(); end(); } uchar read_add(uchar add) { uchar date; start(); write_byte(0x3a); respons(); write_byte(add); respons(); start(); write_byte(0x3b); respons(); date=read_byte(); respons(); end(); return (date); } outa is DDRT_DDRT1
My English is not good, so I can explain about meaning, hope to understand; My program in C51 MCU can be run, but in XS128 has been no response signal
by tian feng
