自己写的nokia5110液晶的显示程序，问题求助各位！

开发板

在开发板上第一次还可以正常显示，但从后面开始下载程序也一直显示一面有点乱的字符（是前几次的显示内容，排版很乱）。
请大神帮我看看啊！谢谢了！后面也有我的keil文件打包，谢谢！

#include
#include"5110.h"
#define uchar unsigned char
#define uint unsigned int
***it rst = P2^0;
***it ce = P2^1;
***it dc = P2^2;
***it din = P2^3;
***it sclk = P2^4;
uchar code asc2tab[][6] =
{
{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },// sp
{ 0x00, 0x00, 0x00, 0x2f, 0x00, 0x00 },// !
{ 0x00, 0x00, 0x07, 0x00, 0x07, 0x00 },// "
{ 0x00, 0x14, 0x7f, 0x14, 0x7f, 0x14 },// #
{ 0x00, 0x24, 0x2a, 0x7f, 0x2a, 0x12 },// $
{ 0x00, 0x62, 0x64, 0x08, 0x13, 0x23 },// %
{ 0x00, 0x36, 0x49, 0x55, 0x22, 0x50 },// &
{ 0x00, 0x00, 0x05, 0x03, 0x00, 0x00 },// '
{ 0x00, 0x00, 0x1c, 0x22, 0x41, 0x00 },// (
{ 0x00, 0x00, 0x41, 0x22, 0x1c, 0x00 },// )
{ 0x00, 0x14, 0x08, 0x3E, 0x08, 0x14 },// *
{ 0x00, 0x08, 0x08, 0x3E, 0x08, 0x08 },// +
{ 0x00, 0x00, 0x00, 0xA0, 0x60, 0x00 },// ,
{ 0x00, 0x08, 0x08, 0x08, 0x08, 0x08 },// -
{ 0x00, 0x00, 0x60, 0x60, 0x00, 0x00 },// .
{ 0x00, 0x20, 0x10, 0x08, 0x04, 0x02 },// /
{ 0x00, 0x3E, 0x51, 0x49, 0x45, 0x3E },// 0
{ 0x00, 0x00, 0x42, 0x7F, 0x40, 0x00 },// 1
{ 0x00, 0x42, 0x61, 0x51, 0x49, 0x46 },// 2
{ 0x00, 0x21, 0x41, 0x45, 0x4B, 0x31 },// 3
{ 0x00, 0x18, 0x14, 0x12, 0x7F, 0x10 },// 4
{ 0x00, 0x27, 0x45, 0x45, 0x45, 0x39 },// 5
{ 0x00, 0x3C, 0x4A, 0x49, 0x49, 0x30 },// 6
{ 0x00, 0x01, 0x71, 0x09, 0x05, 0x03 },// 7
{ 0x00, 0x36, 0x49, 0x49, 0x49, 0x36 },// 8
{ 0x00, 0x06, 0x49, 0x49, 0x29, 0x1E },// 9
{ 0x00, 0x00, 0x36, 0x36, 0x00, 0x00 },// :
{ 0x00, 0x00, 0x56, 0x36, 0x00, 0x00 },// ;
{ 0x00, 0x08, 0x14, 0x22, 0x41, 0x00 },// <
{ 0x00, 0x14, 0x14, 0x14, 0x14, 0x14 },// =
{ 0x00, 0x00, 0x41, 0x22, 0x14, 0x08 },// >
{ 0x00, 0x02, 0x01, 0x51, 0x09, 0x06 },// ?
{ 0x00, 0x32, 0x49, 0x59, 0x51, 0x3E },// @
{ 0x00, 0x7C, 0x12, 0x11, 0x12, 0x7C },// A
{ 0x00, 0x7F, 0x49, 0x49, 0x49, 0x36 },// B
{ 0x00, 0x3E, 0x41, 0x41, 0x41, 0x22 },// C
{ 0x00, 0x7F, 0x41, 0x41, 0x22, 0x1C },// D
{ 0x00, 0x7F, 0x49, 0x49, 0x49, 0x41 },// E
{ 0x00, 0x7F, 0x09, 0x09, 0x09, 0x01 },// F
{ 0x00, 0x3E, 0x41, 0x49, 0x49, 0x7A },// G
{ 0x00, 0x7F, 0x08, 0x08, 0x08, 0x7F },// H
{ 0x00, 0x00, 0x41, 0x7F, 0x41, 0x00 },// I
{ 0x00, 0x20, 0x40, 0x41, 0x3F, 0x01 },// J
{ 0x00, 0x7F, 0x08, 0x14, 0x22, 0x41 },// K
{ 0x00, 0x7F, 0x40, 0x40, 0x40, 0x40 },// L
{ 0x00, 0x7F, 0x02, 0x0C, 0x02, 0x7F },// M
{ 0x00, 0x7F, 0x04, 0x08, 0x10, 0x7F },// N
{ 0x00, 0x3E, 0x41, 0x41, 0x41, 0x3E },// O
{ 0x00, 0x7F, 0x09, 0x09, 0x09, 0x06 },// P
{ 0x00, 0x3E, 0x41, 0x51, 0x21, 0x5E },// Q
{ 0x00, 0x7F, 0x09, 0x19, 0x29, 0x46 },// R
{ 0x00, 0x46, 0x49, 0x49, 0x49, 0x31 },// S
{ 0x00, 0x01, 0x01, 0x7F, 0x01, 0x01 },// T
{ 0x00, 0x3F, 0x40, 0x40, 0x40, 0x3F },// U
{ 0x00, 0x1F, 0x20, 0x40, 0x20, 0x1F },// V
{ 0x00, 0x3F, 0x40, 0x38, 0x40, 0x3F },// W
{ 0x00, 0x63, 0x14, 0x08, 0x14, 0x63 },// X
{ 0x00, 0x07, 0x08, 0x70, 0x08, 0x07 },// Y
{ 0x00, 0x61, 0x51, 0x49, 0x45, 0x43 },// Z
{ 0x00, 0x00, 0x7F, 0x41, 0x41, 0x00 },// [
{ 0x00, 0x55, 0x2A, 0x55, 0x2A, 0x55 },// 55
{ 0x00, 0x00, 0x41, 0x41, 0x7F, 0x00 },// ]
{ 0x00, 0x04, 0x02, 0x01, 0x02, 0x04 },// ^
{ 0x00, 0x40, 0x40, 0x40, 0x40, 0x40 },// _
{ 0x00, 0x00, 0x01, 0x02, 0x04, 0x00 },// '
{ 0x00, 0x20, 0x54, 0x54, 0x54, 0x78 },// a
{ 0x00, 0x7F, 0x48, 0x44, 0x44, 0x38 },// b
{ 0x00, 0x38, 0x44, 0x44, 0x44, 0x20 },// c
{ 0x00, 0x38, 0x44, 0x44, 0x48, 0x7F },// d
{ 0x00, 0x38, 0x54, 0x54, 0x54, 0x18 },// e
{ 0x00, 0x08, 0x7E, 0x09, 0x01, 0x02 },// f
{ 0x00, 0x18, 0xA4, 0xA4, 0xA4, 0x7C },// g
{ 0x00, 0x7F, 0x08, 0x04, 0x04, 0x78 },// h
{ 0x00, 0x00, 0x44, 0x7D, 0x40, 0x00 },// i
{ 0x00, 0x40, 0x80, 0x84, 0x7D, 0x00 },// j
{ 0x00, 0x7F, 0x10, 0x28, 0x44, 0x00 },// k
{ 0x00, 0x00, 0x41, 0x7F, 0x40, 0x00 },// l
{ 0x00, 0x7C, 0x04, 0x18, 0x04, 0x78 },// m
{ 0x00, 0x7C, 0x08, 0x04, 0x04, 0x78 },// n
{ 0x00, 0x38, 0x44, 0x44, 0x44, 0x38 },// o
{ 0x00, 0xFC, 0x24, 0x24, 0x24, 0x18 },// p
{ 0x00, 0x18, 0x24, 0x24, 0x18, 0xFC },// q
{ 0x00, 0x7C, 0x08, 0x04, 0x04, 0x08 },// r
{ 0x00, 0x48, 0x54, 0x54, 0x54, 0x20 },// s
{ 0x00, 0x04, 0x3F, 0x44, 0x40, 0x20 },// t
{ 0x00, 0x3C, 0x40, 0x40, 0x20, 0x7C },// u
{ 0x00, 0x1C, 0x20, 0x40, 0x20, 0x1C },// v
{ 0x00, 0x3C, 0x40, 0x30, 0x40, 0x3C },// w
{ 0x00, 0x44, 0x28, 0x10, 0x28, 0x44 },// x
{ 0x00, 0x1C, 0xA0, 0xA0, 0xA0, 0x7C },// y
{ 0x00, 0x44, 0x64, 0x54, 0x4C, 0x44 },// z
{ 0x14, 0x14, 0x14, 0x14, 0x14, 0x14 }
};
void delay(uint t);
void write_5110_byte(uchar dat, uchar com);
void set_5110_xy(uchar x, uchar y);
void lcd_5110_clear(void);
void lcd_5110_init(void);
void write_5110_string(uchar x, uchar y, uchar *s);
void write_5110_num(uchar x, uchar y, uchar num);
void write_5110_pic(uchar x, uchar y, uchar *map, uchar longx, uchar longy);
void write_5110_byte(uchar dat, uchar com)
{
uchar i;
ce = 0;
if (com == 0)
{
dc = 0;
}
else
{
dc = 1;
}
for (i = 0; i < 8; i++)
{
if (dat & 0x80)
{
din = 1;
}
else
{
din = 0;
}
sclk = 0;
dat = dat << 1;
sclk = 1;
}
ce = 1;
}
void lcd_5110_init(void)
{
delay(10);
rst = 0;
delay(2);
rst = 1;
ce = 0;
delay(2);
ce = 1;
delay(2);
write_5110_byte(0x21, 0);
write_5110_byte(0xc8, 0);
write_5110_byte(0x06, 0);
write_5110_byte(0x13, 0);
write_5110_byte(0x20, 0);
lcd_5110_clear();
write_5110_byte(0x0c, 0);
ce = 0;
}
void set_5110_xy(uchar x, uchar y)
{
write_5110_byte(0x40 | y, 0);
write_5110_byte(0x80 | x, 0);
}
void lcd_5110_clear(void)
{
uchar i, j;
for (i = 0; i < 6; i++)
{
set_5110_xy(j, i);
dc = 1;
while(j < 84)
{
write_5110_byte(0x00, 0);
j++;
}
j = 0;
}
}
void write_5110_string(uchar x, uchar y, uchar *s)
{
uchar line;
set_5110_xy(x,y);
while(*s)
{
for (line = 0; line < 6; line ++)
{
dc = 1;
write_5110_byte(asc2tab[*s - 32][line], 1);
}
s++;
}
ce = 1;
}
void write_5110_num(uchar x, uchar y, uchar num)
{
uchar line;
set_5110_xy(x, y);
dc = 1;
for (line = 0; line < 6; line++)
{
write_5110_byte(asc2tab[num + 16][line], 1);
}
ce = 1;
}
void write_5110_pic(uchar x, uchar y, uchar *map, uchar longx, uchar longy)
{
uchar row;
uint i, n;
if (longy % 8 == 0)
{
row = longy / 8;
}
else
{
row = longy / 8 + 1;
}
set_5110_xy(x, y);
for (n = 0; n < row; n++)
{
for (i = 0; i < longx; i++)
{
set_5110_xy(x + i, y + n);
write_5110_byte(map[i + n * longx], 1);
}
}
}
void delay(uint t)
{
for (; t > 0; t--)
{
;
}
}

复制代码

上面是5110的驱动代码，下面是主函数

#include
#include"5110.h"
#define uchar unsigned char
#define uint unsigned int
uchar code string[] = "Noika 5110";
void main()
{
lcd_5110_init();
while(1)
{
write_5110_string(2,2,string);
lcd_5110_clear();
}
}

复制代码

zjinnan · 2013-10-17 18:01:04

本人新手加菜鸟，进来学习下

笨才爱 · 2013-11-4 07:21:10

{:12:}

网络孤客 · 2013-12-3 15:51:30

楼主解决了吗？

我估计是这个程序问题
void lcd_5110_init(void)
{
      delay(10);
      rst = 0;
      delay(2);
      rst = 1;

      ce = 0;
      delay(2);
      ce = 1;
      delay(2);

      write_5110_byte(0x21, 0);
      write_5110_byte(0xc8, 0);
      write_5110_byte(0x06, 0);
      write_5110_byte(0x13, 0);
      write_5110_byte(0x20, 0);
      lcd_5110_clear();
      write_5110_byte(0x0c, 0);

      ce = 0;
}

因为5110片选是低电平有效，而程序中刚好相反
把ce值改一下，试试。

我只是纸上谈兵，请楼主试试。

网络孤客 · 2013-12-6 00:28:28

刚调通：
1、void lcd_5110_init(void)
{
      delay(10);
      rst = 0;
      delay(2);
      rst = 1;

      ce = 0; //对ce 和 dc赋值都是多余的，因为在write_5110_byte都设置了
      delay(2);
      ce = 1;
      delay(2);

      write_5110_byte(0x21, 0);
      write_5110_byte(0xc8, 0);
      write_5110_byte(0x06, 0);
      write_5110_byte(0x13, 0);
      write_5110_byte(0x20, 0);
      lcd_5110_clear();
      write_5110_byte(0x0c, 0);

      ce = 0;
}

2、
void lcd_5110_clear(void)
{
      uchar i, j;
      for (i = 0; i < 6; i++)
      {
            set_5110_xy(j, i);
            dc = 1;
            while(j < 84)
            {
                     write_5110_byte(0x00, 0);  //这里应为1，因为是写数据而不是命令
                     j++;
            }
            j = 0;
      }
}

3、
void write_5110_string(uchar x, uchar y, uchar *s); //使用char吧！
void write_5110_num(uchar x, uchar y, uchar num);