关于DSP28335控制LCD12864的问题

chong wang3

你好，在一个LCD12864的控制程序中看到一段

#include"DSP2833x_Device.h"
#include "DSP2833x_Examples.h"

#define LCD_DATA_BUS (*((volatile Uint16 *)0x4000))

#define EN GpioDataRegs.GPBDAT.bit.GPIO54
#define RW GpioDataRegs.GPBDAT.bit.GPIO56
#define RS GpioDataRegs.GPBDAT.bit.GPIO57

#define uchar unsigned char

extern uchar menu1[]={"选择电机定时设置"};
extern uchar menu2[]={"时间设置1"};
extern uchar menu3[]={"时间设置2"};
extern uchar menu4[]={"时间设置3"};

void LCDInit(void);
void Write_order(uchar order);
void Write_data(uchar data);
void delay(uchar t);
void configio(void);
void InitXintf(void);
void display(void);

void LCD_DATA (uchar d)
{
LCD_DATA_BUS = d;

}

其中#define LCD_DATA_BUS (*((volatile Uint16 *)0x4000))应该是定义了八个数据传输口，但是不太了解这句话怎么对应的引脚，求解释一下，多谢了

9 年多前

0 chong wang3 9 年多前

Prodigy 40 points

之后我根据原理图的引脚接线，自己尝试数据一位位传输的方式

#include"DSP2833x_Device.h"
#include "DSP2833x_Examples.h"
#define EN GpioDataRegs.GPBDAT.bit.GPIO54
#define RW GpioDataRegs.GPBDAT.bit.GPIO56
#define RS GpioDataRegs.GPBDAT.bit.GPIO57

#define D0 GpioDataRegs.GPCDAT.bit.GPIO79
#define D1 GpioDataRegs.GPCDAT.bit.GPIO78
#define D2 GpioDataRegs.GPCDAT.bit.GPIO77
#define D3 GpioDataRegs.GPCDAT.bit.GPIO76
#define D4 GpioDataRegs.GPCDAT.bit.GPIO75
#define D5 GpioDataRegs.GPCDAT.bit.GPIO74
#define D6 GpioDataRegs.GPCDAT.bit.GPIO73
#define D7 GpioDataRegs.GPCDAT.bit.GPIO72

#define uchar unsigned char
extern uchar menu1[]={"选择电机定时设置"};
extern uchar menu2[]={"时间设置1"};
extern uchar menu3[]={"时间设置2"};
extern uchar menu4[]={"时间设置3"};

void LCDInit(void);
void Write_order(uchar order);
void Write_data(uchar data);
void delay(uchar t);
void configio(void);
void InitXintf(void);
void display(void);
}

void LCD_DATA (uchar d)
{
D0=d&0x01;
D1=d&0x02;
D2=d&0x04;
D3=d&0x08;
D4=d&0x10;
D5=d&0x20;
D6=d&0x40;
D7=d&0x80;
}

。。。。。

void configio(void)
{
EALLOW;

GpioCtrlRegs.GPBMUX2.bit.GPIO54 = 0;
GpioCtrlRegs.GPBDIR.bit.GPIO54 = 1;
GpioCtrlRegs.GPBMUX2.bit.GPIO56 = 0;
GpioCtrlRegs.GPBDIR.bit.GPIO56 = 1;
GpioCtrlRegs.GPBMUX2.bit.GPIO57= 0;
GpioCtrlRegs.GPBDIR.bit.GPIO57 = 1;

GpioCtrlRegs.GPCMUX1.bit.GPIO79 = 0;
GpioCtrlRegs.GPCDIR.bit.GPIO79 = 1;

GpioCtrlRegs.GPCMUX1.bit.GPIO78 = 0;
GpioCtrlRegs.GPCDIR.bit.GPIO78 = 1;

GpioCtrlRegs.GPCMUX1.bit.GPIO77 = 0;
GpioCtrlRegs.GPCDIR.bit.GPIO77 = 1;

GpioCtrlRegs.GPCMUX1.bit.GPIO76 = 0;
GpioCtrlRegs.GPCDIR.bit.GPIO76 = 1;

GpioCtrlRegs.GPCMUX1.bit.GPIO75 = 0;
GpioCtrlRegs.GPCDIR.bit.GPIO75 = 1;

GpioCtrlRegs.GPCMUX1.bit.GPIO74 = 0;
GpioCtrlRegs.GPCDIR.bit.GPIO74 = 1;

GpioCtrlRegs.GPCMUX1.bit.GPIO73 = 0;
GpioCtrlRegs.GPCDIR.bit.GPIO73 = 1;

GpioCtrlRegs.GPCMUX1.bit.GPIO72 = 0;
GpioCtrlRegs.GPCDIR.bit.GPIO72 = 1;
EDIS;

}

但是之前能显示的汉字却不能显示，不知道这是为什么？求解答