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龙丘智能奉献LCD1602液晶MC9S12XS128代码一份，接口说明详细
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| Code Warrior 5.0 Target : MC9S12XS128 Crystal: 16.000Mhz busclock: 8.000MHz pllclock:16.000MHz ============================================ 液晶管脚接线定义 PIN1 GND PIN2 5V PIN3 10K电阻接地 PIN4 LCD1602_RS PORTB_PB0 //Data Command Pin 1 data 0 command PIN5 LCD1602_RW PORTB_PB1 //Read Write Pin 1 read 0 write PIN6 LCD1602_EN PORTB_PB2 //LCD Enable Signal PIN7-14 LCDIO PORTA ------------------------------------------------------ 主题函数如下图，完整工程参考附件：  LQ_XS_LCD1602.rar (60.72 KB) #include "derivative.h" #include "LQ1602.h" void LcdInit(){ DDRA = 0xff; DDRB = 0xff; LCDIO_DIR = LCDIO_DIR_OUT; LcdDelay(); LcdCommand(CLR,0); //clear screen LcdCommand(DATA_MODE,1); //set 8 bit data transmission mode LcdCommand(INPUTMODE_CUR_R | INPUTMODE_ALL_D, 1); // cursor right, disable moving LcdCommand(SCREEN_OPEN | SCREEN_OPEN_CUR | SCREEN_OPEN_TWI, 1); //open display (enable lcd display) LcdCommand(LINE1_HEAD,1); //set lcd first display address LcdCommand(CLR,1); //clear screen } //////////////////////////////////////////////////////////////////// // write command // void LcdCommand(byte command,byte BusyC){ if (BusyC) ReadStatus(); //Test it busy or not LCDIO=command; LCD1602_RS=0; LCD1602_RW=0; LCD1602_EN=0; LCD1602_EN=0; LCD1602_EN=1; } byte ReadStatus(void) { byte cRtn; LCDIO_DIR = LCDIO_DIR_IN; LCD1602_RS = 0; LCD1602_RW = 1; LCD1602_EN = 0; LCD1602_EN = 0; LCD1602_EN = 1; while (LCDIO & BUSY); //Test Busy State cRtn = LCDIO_DIR; // if Not save the port value, it should be change LCDIO_DIR = LCDIO_DIR_OUT; return(cRtn); } void LcdDelay(void) { word i, j; for (i = 0; i < 300; i++) for(j = 0; j < 3000; j++); } void LcdClear(void) { LcdCommand(CLR,1); //clear screen } //////////////////////////////////////////////////////////////////// // write data // void LcdData(byte dat,byte BusyC) { if (BusyC) ReadStatus(); //Test it busy or not LCDIO=dat; LCD1602_RS=1; LCD1602_RW=0; LCD1602_EN=0; LCD1602_EN=0; LCD1602_EN=1; } //////////////////////////////////////////////////////////////////// // write lcd a character // void LcdWriteChar( byte x,byte y,byte dat){ LcdSetXY(x, y); LcdData(dat,1); } //////////////////////////////////////////////////////////////////// // set display address // void LcdSetXY( byte x, byte y ){ byte address; if (y == LINE1) address = LINE1_HEAD + x; else address = LINE2_HEAD + x; LcdCommand(address,1); } //////////////////////////////////////////////////////////////////// // write lcd string // void LcdWriteStr(byte X,byte Y,char *s) { LcdSetXY( X, Y ); //set address while (*s) // write character { LcdData(*s, 1); s++; } } |
