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Feb 20th, 2013
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  1. #include <avr/io.h>
  2. #define F_CPU 1000000UL
  3. #include <util/delay.h>
  4.  
  5. #define RS PD0
  6. #define E PD2
  7. #define RW PD1
  8. #define LCD_DTA PORTB
  9. #define LCD_CMD PORTD
  10.  
  11. void lcd_cmd(unsigned char cmd)
  12. {
  13. LCD_DTA = cmd;
  14. LCD_CMD = (0<<RS);
  15. LCD_CMD = (0<<RW);
  16. LCD_CMD = (1<<E);
  17. _delay_ms(1);
  18. LCD_CMD = (0<<E);
  19. _delay_ms(50);
  20.  
  21. return;
  22. }
  23.  
  24. void lcd_init()
  25. {
  26. lcd_cmd(0x38);
  27. _delay_ms(1);
  28. lcd_cmd(0x01);
  29. _delay_ms(1);
  30. lcd_cmd(0x0f);
  31. _delay_ms(1);
  32.  
  33. lcd_cmd(0x80);
  34. _delay_ms(1);
  35. return;
  36. }
  37.  
  38. void lcd_print(unsigned char my_symbol)
  39. {
  40. LCD_CMD = (1<<RS);
  41. LCD_CMD = (0<<RW);
  42. LCD_CMD = (1<<E);
  43. LCD_DTA = my_symbol;
  44.  
  45. _delay_ms(1);
  46. LCD_CMD = (0<<E);
  47. _delay_ms(50);
  48. }
  49.  
  50. int main()
  51. {
  52. DDRD = 0xff;
  53. DDRB = 0xff;
  54. lcd_init();
  55. _delay_ms(50);
  56.  
  57. lcd_print(0x31);
  58.  
  59. while (1)
  60. {
  61. ;
  62. }
  63. return 0;
  64. }
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