STM32

LCD1602显示

2019-07-14 20:27发布

站内问答 / STM32/STM8
7314 6 1595
   我在郭天祥的单片机板子上面用了下面的代码，液晶显示1602就不显示了呢？
其他引脚的功能我没有变化，只是把RS，RW，EN分别插到引脚P1.0，P1.1，P1.2。望哪位大神帮忙解答一下，
在此谢谢！

  1. #include<reg52.h>
  2. #define uchar unsigned char
  3. #define uint unsigned int

  5. #define Lcd_DB P0
  6. sbit Lcd_RS = P1^0;
  7. sbit Lcd_RW = P1^1;
  8. sbit Lcd_EN = P1^2;
  9. sbit dula = P2^6;
  10. sbit wela = P2^7;

  12. void InitLcd1602();
  13. void LcdShowStr(unsigned char x, unsigned char y, unsigned char *str);

  15. void main()
  16. {
  17.         wela = 0;
  18.         dula = 0;
  19.         InitLcd1602();
  20.         LcdShowStr(2,0,"UESTC.COM");
  21.         LcdShowStr(0,1,"WELCOME TO UESTC");
  22.         while(1);
  23. }

  25. void LcdWaitReady()
  26. {
  27.         unsigned char sta;

  29.         Lcd_DB = 0xff;
  30.         Lcd_RS = 0;
  31.         Lcd_RW = 1;       

  33.         do{
  34.                 Lcd_EN = 1;
  35.                 sta = Lcd_DB;
  36.                 Lcd_EN = 0;
  37.         }while(sta&0x80);
  38. }

  40. void LcdWriteCmd(unsigned char cmd)
  41. {
  42.         LcdWaitReady();
  43.         Lcd_RS = 0;
  44.         Lcd_RW = 0;
  45.         Lcd_DB = cmd;
  46.         Lcd_EN = 1;
  47.         Lcd_EN = 0;
  48. }

  50. void InitLcd1602()
  51. {
  52.         LcdWriteCmd(0x38);
  53.         LcdWriteCmd(0x0C);
  54.         LcdWriteCmd(0x06);
  55.         LcdWriteCmd(0x01);
  56. }

  58. void LcdShowCursor(unsigned char x, unsigned char y)
  59. {
  60.         unsigned char addr;
  61.         if(0==y)
  62.         {
  63.                 addr = 0x00 + x;
  64.         }
  65.         else
  66.                 addr = 0x40 + x;

  68.         LcdWriteCmd(addr | 0x80);
  69. }

  71. void LcdWriteDat(unsigned char dat)
  72. {
  73.         LcdWaitReady();
  74.         Lcd_RS = 1;
  75.         Lcd_RW = 0;
  76.         Lcd_DB = dat;
  77.         Lcd_EN = 1;
  78.         Lcd_EN = 0;
  79. }

  81. void LcdShowStr(unsigned char x, unsigned char y, unsigned char *str)
  82. {
  83.         LcdShowCursor(x,y);
  84.        
  85.         while(*str != '')
  86.         {
  87.                 LcdWriteDat(*str++);
  88.         }
  89. }
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6条回答
rgb2251
2019-07-15 14:57
看下你的开发板原理图，这三根线可能都不需要你自己单独接线！

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