基于Cortex-M3(1752)的串行LCD12864程序.doc

#include .config.h#define uchar unsigned char#define uint unsigned int#define CS (1 22) /P0.8 RS#define SID (1 29) /P0.9RW #defineSCLK (1 30) /P0.11 E#define Set_CS() FIO0SET = CS /P0.8置1 #define Set_SID() FIO0SET = SID /P0.9置1 #define Set_SCLK() FIO0SET = SCLK /P0.11置1#define Clr_CS() FIO0CLR = CS /P0.8置0 #define Clr_SID() FIO0CLR = SID /P0.9置0 #define Clr_SCLK() FIO0CLR = SCLK /P0.11置0extern void Lcd_WriteDat(char RW, char RS,uchar W_data);extern void Lcd_WriteCmd(uint W_bits);extern void Lcd_SetPos(uchar y,uchar x);extern _inline void Delay(uint a);extern void Lcd_WriteDat(char RW, char RS,uchar W_data);void myDelay(INT32U ulTime) INT32U i; i = 0; while (ulTime-) for (i = 0; i 50000; i+); _inline void Delay(uint a) uint i;while( -a != 0) for(i = 0; i5200; i+); void nop(void) uint i; for(i=1;i12;i+); /*函数Lcd_SetPos作用：设置12864字符显示位置 y：为第几行x：为从第几个字符开始*/void Lcd_SetPos(uchar y,uchar x) if(y = 0) Lcd_WriteDat(0,0,(0x80+x); if(y = 1) Lcd_WriteDat(0,0,(0x90+x); if(y = 2) Lcd_WriteDat(0,0,(0x88+x); if(y = 3) Lcd_WriteDat(0,0,(0x98+x); void Lcd_DispLine(uchar y,uchar x ,char *p) /函数作用：写入字符串 Lcd_SetPos(y,x);while(*p != 0) Lcd_WriteDat(0,1,*p+);Delay(1); /*12864初始化函数*/void LCD_Init(void) uchar cmd;FIO0DIR |= CS;FIO0DIR |= SID;FIO0DIR |= SCLK;Delay(2); cmd=0x30;/功能设置 8位数据，基本指令Lcd_WriteDat(0,0,cmd);Delay(2);cmd=0x06;Lcd_WriteDat(0,0,cmd);/写指令Delay(2);cmd=0x0C;/显示状态 ON，游标OFF，反白OFFLcd_WriteDat(0,0,cmd);/写指令Delay(2);cmd=0x01;/清除显示Lcd_WriteDat(0,0,cmd);/写指令Delay(2);cmd=0x02;/地址归位Lcd_WriteDat(0,0,cmd);/写指令Delay(2);cmd=0x80;/设置DDRAM地址Lcd_WriteDat(0,0,cmd);/写指令Delay(2);/延时/*函数Lcd_WriteDat作用：写一个字节的数据到12864液晶，包括指令和数据*/void Lcd_WriteDat(char RW, char RS,uchar W_data)uint H_data,L_data,S_ID = 0xf8; /11111RWRS0if(RW = 0) S_ID &= 0x04; else S_ID |= 0X04; /if(RW=1)if(RS = 0) S_ID &= 0x02; else S_ID |= 0X02; /if(RS=1)H_data = W_data;H_data &= 0xf0;/屏蔽低4位的数据L_data = W_data; /xxxx0000格式L_data &= 0x0f;/屏蔽高4位的数据L_data = 4;/xxxx0000格式Set_CS();Lcd_WriteCmd(S_ID); /发送S_IDLcd_WriteCmd(H_data);/发送H_dataLcd_WriteCmd(L_data);/发送L_dataClr_CS();/*函数Lcd_WriteCmd作用：负责串行输出8个bit位*/void Lcd_WriteCmd(uint W_bits)uint i,Temp_data;for(i=0; i8; i+)Temp_data = W_bits;Temp_