使用51单片机+lcd1602转接板-iic接口进行显示.zip

#include "reg51.h" #include "string.h" sbit SCL=P2^0; sbit SDA=P2^1; void delay_ms(unsigned int ms); void delay_10us(unsigned int i); /**********I2C init***********/ void I2cStart(void); void I2cStop(void); unsigned char I2cSendByte(unsigned char dat); /********************/ void lcd_init(void); void write_cmd(unsigned char cmd); void write_data(unsigned char DData); void dispaly(unsigned char X, unsigned char Y, unsigned char DData); void dispaly_character(unsigned char X, unsigned char Y, unsigned char* Arry); unsigned char code arry[]="successfully!"; int main() { lcd_init(); while(1) { dispaly_character(3,0,arry); } } void I2cStart(void) { SDA=1; delay_10us(1); SCL=1; delay_10us(1); SDA=0; delay_10us(1); SCL=0; delay_10us(1); } /*stop*/ void I2cStop(void) { SDA=0; delay_10us(1); SCL=1; delay_10us(1); SDA=1; delay_10us(1); } unsigned char I2cSendByte(unsigned char dat) { unsigned char a=0,b=0; for(a=0;a<8;a++) { SDA=dat>>7; dat=dat<<1; delay_10us(1); SCL=1; delay_10us(1); SCL=0; delay_10us(1); } SDA=1; delay_10us(1); SCL=1; while(SDA) { b++; if(b>200) { SCL=0; delay_10us(1); return 0; } } SCL=0; delay_10us(1); return 1; } void delay_ms(unsigned int ms) { unsigned int i,j; for(j=0;j<ms;j++) for(i=0;i<1000;i++); } void delay_10us(unsigned int i) { unsigned char a,b,c; for(c=0;c<i;c++) { for(b=1;b>0;b--) { for(a=2;a>0;a--); } } } void write_cmd(unsigned char cmd) { I2cStart(); I2cSendByte(0x7c); I2cSendByte(0x80); I2cSendByte(cmd); I2cStop(); } void lcd_init(void) { write_cmd(0X38); write_cmd(0x0c); write_cmd(0x01); delay_ms(2); } void dispaly(unsigned char X, unsigned char Y, unsigned char DData) { Y&=0x1; X&=0xF; if(Y) X|=0x40; X|=0x80; write_cmd(X); write_data(DData); } void write_data(unsigned char DData) { I2cStart(); I2cSendByte(0x7c); I2cSendByte(DData); I2cSendByte(0x40); I2cSendByte(DData); I2cStop(); } void dispaly_character(unsigned char X, unsigned char Y, unsigned char* Arry) { unsigned int i; unsigned int length=strlen(Arry); for(i=0;i<length;i++) { dispaly(X,Y,Arry[i]); X++; if(X>16) {Y+=1;X=0;} } }