用MSP430驱动LCD屏，不显示字，但是在数据引脚上可以测到相应的高低电平，比如说显示'T'，在DB7~DB0上可以检测到“底高低高低高低低”电平，不知道是什么原因。程序如下：（刚开始做，写的不好）
#include <MSP430x14x.h>
#include <intrinsics.h>
typedef unsigned char uchar;
typedef unsigned int uint;
#define RS BIT7
#define RW BIT6
#define E BIT5
//-----------------------------------
// dispaly data
//-----------------------------------
uchar **1[]="TOPWAY Char LCDM";
uchar **[]="1234567890123456";
uchar i;
//-----------------------------------
// Delay Routine
//-----------------------------------
void delayus(uint u) //delay routine
{
uint i;
for(i=0;i<=u;i++)
{
__no_operation();
__no_operation();
}
}
void delayms(uint m)
{
uint j;
uint i;
for(i=0; i<m; i++)
for(j=0; j<250; j++)
__no_operation();
}
//-----------------------------------
// IO Routine
//-----------------------------------
void SdCmd(uchar command) //send command
{
P2OUT &= ~BIT5;
P2OUT &= ~BIT6;
P2OUT &= ~BIT7;
P4OUT=command;
P2OUT |= BIT5;
__no_operation();
__no_operation();
__no_operation();
P2OUT &= ~BIT5;
delayus(50);
}
void SdData(uchar DData) //send data
{
P2OUT &= ~BIT5;
P2OUT &=~ BIT6;
P2OUT |= BIT7;
P4OUT=DData;
P2OUT |= BIT5;
__no_operation();
__no_operation();
__no_operation();
P2OUT &= ~BIT5;
__no_operation();
__no_operation();
__no_operation();
}
//-----------------------------------
// init
//-----------------------------------
void LCD_init()
{
SdCmd(0x38); //8bit I/F;2-linedisplay;5x8 font
SdCmd(0x04); //No screen shifting
SdCmd(0x0c); //Display on;cursor off;cursor-blinking off
SdCmd(0x01); //clear screen
delayms(2); //clear screen command takes more time
}
//-----------------------------------
// Main Program
//-----------------------------------
void main()
{
WDTCTL = WDTPW + WDTHOLD;
P2SEL &= ~0xe0;
P2DIR |= 0xe0;
P2OUT &= ~0Xe0;
P3SEL &= ~BIT3;
P3DIR |= BIT3;
P3OUT |= BIT3;
P4SEL &= ~0xff;
P4DIR |= 0xff;
P4OUT=0x00;
delayms(10); // wait for LCD module power on reset
LCD_init();
SdCmd(0x80);
for(i=0;i<16;i++)
{ SdData(**1);
delayms(5);}
SdCmd(0x80+0x40);
for(i=0;i<16;i++)
{ SdData(**);
delayms(5);}
while(1); //end of program
}
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