launchpad串口接12864液晶显示问题

yangxb303 2012-6-28 14:20 楼主

最近在弄launch pad 串行接12864液晶屏，但就是出不来，跪求大神们前来指导。

//P2.6为SID 接R/W， P2.7为SCLK, 接E， cs端接vcc, psb接gnd.

#include <msp430g2433.h>

unsigned char array1[]={"hello world"};

void delay(unsigned char n)

{

unsigned char i;

while(n>0)

{

for(i=0;i<200;i++);

n--;

}

void lcd_com(unsigned char cmd_data, unsigned char str)

{

unsigned int i,j,temp;

//temp=str;

delay(1);

P2OUT &= ~0x40; //sid=0 P2.6

delay(1);

P2OUT &= ~0x80; //p2.7 sclk=0

P2OUT |= 0x40; //p2.6 sid=1

for(i=0;i<5;i++)

{

P2OUT |= 0x80; //p2.7 sclk=1

delay(1);

P2OUT &= ~0x80; //p2.7 sclk=0

}

delay(1);

P2OUT &= ~0x40; //p2.6 sid=0

P2OUT |= 0x80; //p2.7 sclk=1

delay(1);

P2OUT &= ~0x80; //p2.7 sclk=0

// sid=1111,10 RS 0

if(cmd_data)

{

P2OUT |= 0x40; //sid=1

}

else{P2OUT &= ~0x40;}//sid=0

P2OUT |= 0x80;

delay(1);

P2OUT &= ~0x80;

P2OUT &= ~0x40;

P2OUT |= 0x80;

delay(1);

P2OUT &= ~0x80;

for(j=0;j<2;j++)

{

for(i=0;i<4;i++)

{

temp=str;

temp<<=i;

if((temp&0x80)==0)

{

P2OUT &= ~0x40;

delay(1);

P2OUT |= 0x80;

delay(1);

P2OUT &= ~0x80;

delay(1);

P2OUT &= ~0x40;

}

else

{

P2OUT |= 0x40;

delay(1);

P2OUT |= 0x80;

delay(1);

P2OUT &= ~0x80;

delay(1);

P2OUT &= ~0x40;

}

P2OUT &= ~0x40;

for(i=0;i<4;i++)

{

P2OUT |= 0x80;

delay(1);

P2OUT &= ~0x80;

}

void init()

{

delay(15);

lcd_com(0,0x30);

delay(10);

lcd_com(0,0x30);

delay(1);

lcd_com(0,0x0c);

delay(1);

lcd_com(0,0x01);

delay(1);

lcd_com(0,0x06);

delay(1);

lcd_com(0,0x80);

delay(1);

}

void main()

{

unsigned char p;

init();

P2DIR |= 0xc0;

while(1){

lcd_com(0,0x80);

delay(10);

for(p=0;array1[p]!='\0';p++)

{

lcd_com(1,array1[p]);

}

回复评论（10）

沙发 juring

试试我的程序呢~

我的12864是在背面有个跳线可以选择串行并行模式的，所以我没有管 PSB~

[ 本帖最后由 juring 于 2012-6-28 18:35 编辑 ]

ST7920.rar (2012-6-28 16:44 上传)

3.23 KB, 下载次数: 158

点赞 2012-6-28 16:42

板凳常见泽1

串行的没玩过一直玩的并行的串行的貌似省了不少端口

点赞 2012-6-28 17:21

回复沙发 juring 的帖子

我按你那个更改了下，还是不行撒。。给跪了

#include

//cs  Vcc
//sid P2.6
//sclk P2.7

#define SCLK_OUT P2DIR |=BIT7
#define SID_OUT    P2DIR |=BIT6
#define SID_H    P2OUT |=BIT6
#define SID_L    P2OUT &=~BIT6
#define SCLK_H    P2OUT |=BIT7
#define SCLK_L    P2OUT &=~BIT7

void LCD_Writebyte(unsigned char Chr)
{
unsigned char i;
SID_OUT;
for(i=0;i<8;i++)
{
SCLK_L;
_NOP();
_NOP();
if(Chr&0x80){SID_H;}
else{SID_L;}
_NOP();
_NOP();
_NOP();
_NOP();
SCLK_H;
_NOP();
_NOP();
Chr<<=1;
}
}

void LCD_Writecmd(unsigned char cmd)
{
LCD_Writebyte(0xf8);
LCD_Writebyte(cmd&0xf0);
LCD_Writebyte((cmd<<4)&0xf0);
}

void LCD_Writedata(unsigned char data)
{
LCD_Writebyte(0xfa);
LCD_Writebyte(data&0xf0);
LCD_Writebyte((data<<4)&0xf0);
}

void LCD_Initial()
{
SCLK_OUT;
LCD_Writecmd(0x30);
LCD_Writecmd(0x02);
LCD_Writecmd(0x01);
LCD_Writecmd(0x0c);
}

void LCD_disp(unsigned char *str)
{
LCD_Writecmd(0x30);
LCD_Writecmd(0x80);
while(*str)
{
LCD_Writedata(*str);
str++;
}
}

void main()
{
WDTCTL=WDTPW+WDTHOLD;
SID_OUT;
SCLK_OUT;
LCD_Initial();
while(1)
{
LCD_disp("helloworld");
}
}

点赞 2012-6-28 22:27