LCD1602无法工作,自己写的源代码,求助.

CodeMonkey

另外要请教一个问题，AS6怎么软件仿真。

1. /*
   
2. * LCD1602_C.c
   
3. *
   
4. * Created: 2013/1/14 11:23:45
   
5. *  Author: Tater
   
6. */
   
7. 
   
8. 
   
9. #include <avr/io.h>
   
10. #include <util/delay.h>
    
11. 
    
12. #define RS 0
    
13. #define RW 1
    
14. #define E  2
    
15. 
    
16. 
    
17. void Busy(){
    
18.         DDRA = 0xFF;
    
19.         PORTA = 0xFF;
    
20.         DDRB |= (1<<E)|(1<<RW)|(1<<RS);
    
21.         PORTB =(PORTB & (~(1<<RS))) | (1<<RW);//RS = 0,RW = 1
    
22.         while (PORTA & 0x80)
    
23.         {
    
24.                 PORTB &= (~(1<<E));//E = 0
    
25.                 PORTB |= (1<<E);//E = 1
    
26.         }
    
27.         PORTB &= (~(1<<E));//E = 0
    
28. }
    
29. 
    
30. void WriteCommand(unsigned char        btCommand){
    
31.         Busy();
    
32.         PORTB = (PORTB & (~(1<<RS)|(1<<RW))) | (1<<E);//RS = 0 RW = 0 E = 1
    
33.         PORTA = btCommand;
    
34.         PORTB &= (~(1<<E));//E = 0
    
35. }
    
36. 
    
37. void WriteData(unsigned char btData){
    
38.         Busy();
    
39.         PORTB = (PORTB & (~(1<<RW))) | (1<<RS) | (1<<E);//RS = 1 RW = 0 E = 1
    
40.         PORTA = btData;
    
41.         PORTB &= (~(1<<E));//E = 0
    
42. }
    
43. 
    
44. void Init(){
    
45.         DDRA = 0xFF;
    
46.         PORTB &= (~(1<<E));//E = 0
    
47.         WriteCommand(0x38);
    
48.         _delay_ms(10);
    
49.         WriteCommand(0x0c);
    
50.         _delay_ms(10);
    
51.         WriteCommand(0x01);
    
52.         _delay_ms(10);
    
53.         WriteCommand(0x06);
    
54.         _delay_ms(10);
    
55. }
    
56. 
    
57. int main(void)
    
58. {
    
59.         Init();
    
60.     while(1)
    
61.     {
    
62.                 WriteCommand(0x80);
    
63.                 WriteData('a');
    
64.     }
    
65. }

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明天你好

时序有问题，再看看时序图

CodeMonkey

明天你好 发表于 2013-1-16 21:42
时序有问题，再看看时序图

解决了,是PINA读取,写错了.