以下是12864显示字符的完整代码：
#include"DSP2833x_Device.h"
#include "DSP2833x_Examples.h"
#define EN GpioDataRegs.GPBDAT.bit.GPIO33
#define RW GpioDataRegs.GPBDAT.bit.GPIO32
#define RS GpioDataRegs.GPADAT.bit.GPIO20
#define uchar unsigned char
extern uchar menu1[]={"选择电机定时设置"};
extern uchar menu2[]={"开步进电机A"};
extern uchar menu3[]={"开步进电机B"};
extern uchar menu4[]={"开步进电机C"};
void LCDInit(void);
void Write_order(Uint16 order);
void Write_data(Uint16 data);
void delay(Uint16 t);
void configio(void);
//void InitXintf(void);
void display(uchar *hz);
void LCD_DATA(uchar d){
Uint32 i=0;
i = GpioDataRegs.GPADAT.all;
i |= (d<<6)&0x3FC0;
i = (~((d<<6)&0x3FC0))|(~i);
GpioDataRegs.GPADAT.all = ~i;
}
void LCDInit(void)
{
delay(500);
Write_order(0x30);// 功能设定：基本指令动作
delay(5);
Write_order(0x0c);//显示状态：开
delay(5);
Write_order(0x01);//清屏
delay(6);
Write_order(0x02);//地址归位：AC=0x00
delay(4);
}
void Write_order(Uint16 order)
{
RS=0;delay(1);
RW=0;delay(1);
EN=1;delay(1);
LCD_DATA(order);
delay(10);
EN=0;delay(1);
}
void Write_data(Uint16 data)
{
RS=1;delay(1);
RW=0;delay(1);
EN=1;delay(1);
LCD_DATA(data);
delay(10);
EN=0;delay(1);
}
void delay(Uint16 t)
{
Uint16 i;
while(t--)
{
for(i=0;i<125;i++);
}
}
void configio(void)
{
EALLOW;
GpioCtrlRegs.GPAMUX1.all &= 0xc03f;
GpioCtrlRegs.GPADIR.all |= 0x00003FC0;
GpioCtrlRegs.GPBMUX1.bit.GPIO33 = 0;
GpioCtrlRegs.GPBDIR.bit.GPIO33 = 1;
GpioCtrlRegs.GPBMUX1.bit.GPIO32 = 0;
GpioCtrlRegs.GPBDIR.bit.GPIO32 = 1;
GpioCtrlRegs.GPAMUX2.bit.GPIO20= 0;
GpioCtrlRegs.GPADIR.bit.GPIO20 = 1;
EDIS;
}
void display(uchar *hz)
{
while(*hz!='\0')
{
Write_data(*hz);
hz++;
delay(2);
}
}
void main(void)
{
InitSysCtrl();
// InitXintf();
InitXintf16Gpio();
DINT;
InitPieCtrl();
IER=0x0000;
IFR=0x0000;
configio();
RS=0;
delay(5);
RW=0;
delay(5);
EN=0;
LCDInit();
delay(5);
Write_order(0x01);
delay(50);
Write_order(0x80);
delay(5);
display(menu1);
Write_order(0x91);
delay(5);
display(menu2);
Write_order(0x89);
delay(5);
display(menu3);
Write_order(0x99);
delay(5);
display(menu4);
while(1);
}
我想请教一下void LCD_DATA(uchar d)
{
Uint32 i=0;
i = GpioDataRegs.GPADAT.all;
i |= (d<<6)&0x3FC0;
i = (~((d<<6)&0x3FC0))|(~i);
GpioDataRegs.GPADAT.all = ~i;
} 这一小段代码中GpioDataRegs.GPADAT.all的值是多少呀，以及这段代码它实现的是什么功能？这个程序已经困扰我好几天了，跪求高手指点！！！在此先感谢了！ |
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