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  1. //////////////////////////////////////////////////////////////////////////////
  2. // Laboratory AVR Microcontrollers Part2
  3. // Program template for lab 9
  4. //
  5. // Authors: Herjan Michal, Krol Wojciech, Skowron Tomasz
  6. //
  7. // Group: 3
  8. // Section: 6
  9. //
  10. // Task: b
  11. //
  12. // Todo: -
  13. //
  14. // Version: 1.0
  15. //////////////////////////////////////////////////////////////////////////////
  16. #include <avr/io.h>
  17. #include <avr/interrupt.h>
  18. #include <avr/pgmspace.h>
  19. #define F_CPU 16000000L
  20. #include <util/delay.h>
  21.  
  22. uint8_t const TAB_ROM[] PROGMEM = {0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x1F,
  23. 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1F, 0x1F,
  24. 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x2E, 0x2F,
  25. 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, 0x3B, 0x3C, 0x3D, 0x3E, 0x3F,
  26. 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4A, 0x4B, 0x4C, 0x4D, 0x4E, 0x4F,
  27. 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5A, 0x5B, 0x5C, 0x5D, 0x5E, 0x5F,
  28. 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F,
  29. 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A, 0x7B, 0x7C, 0x7D, 0x7E, 0x7F,
  30. 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x8B, 0x8C, 0x8D, 0x8E, 0x8F,
  31. 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9A, 0x9B, 0x9C, 0x9D, 0x9E, 0x9F,
  32. 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, 0xa8, 0xa9, 0xaA, 0xaB, 0xaC, 0xaD, 0xAE, 0xAF,
  33. 0xB0, 0xB1, 0xB2, 0xB3, 0xB4, 0xB5, 0xB6, 0xB7, 0xB8, 0xB9, 0xBA, 0xBB, 0xBC, 0xBD, 0xBE, 0xBF,
  34. 0xC0, 0xC1, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7, 0xC8, 0xC9, 0xCA, 0xCB, 0xCC, 0xCD, 0xCE, 0xCF,
  35. 0xE0, 0xE1, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7, 0xE8, 0xE9, 0xEA, 0xEB, 0xEC, 0xED, 0xEE, 0xEF,
  36. 0xFF, 0xFE, 0xFD, 0xFC, 0xFB, 0xFA, 0xF9, 0xF8, 0xF7, 0xF6, 0xF5, 0xF4, 0xF3, 0xF2, 0xF1, 0xF0,
  37. 0xFF, 0xFF};
  38.  
  39. volatile uint8_t interruptCounter;
  40. volatile int counter025s;
  41.  
  42. void initializeTimer() {
  43. // set up timer with scaler = 8
  44. TCCR1B |= (1 << CS11);
  45. // initialize counter
  46. TCNT1 = 0;
  47. // enable overflow interrupt
  48. TIMSK1 |= (1 << TOIE1);
  49. // enable global interrupts
  50. sei();
  51.  
  52. // initialize interrupts counters
  53. interruptCounter = 0;
  54. counter025s = 0;
  55. }
  56.  
  57. const int NUMBER_OF_INTERRUPTS_PER_025s = 8; // (approx.)
  58.  
  59. ISR(TIMER1_OVF_vect)
  60. {
  61. // next interrupt occured
  62. interruptCounter++;
  63.  
  64. if (interruptCounter >= NUMBER_OF_INTERRUPTS_PER_025s)
  65. {
  66. // every 0.25s
  67. counter025s++;
  68. interruptCounter = 0;
  69. }
  70. }
  71.  
  72.  
  73. int main(void) {
  74. //initalize port B b4 and b0 have two buttons, b5,b6,b7 have 3 diodes (DDRB=1110 000)
  75. DDRB=0xEE;
  76. //initialize port L
  77. PORTL=0x00;
  78. DDRL=0xFF;
  79. //initializa port D
  80. PORTD=0xFF;
  81. DDRD=0xFF;
  82.  
  83.  
  84. // enable PORT
  85. DDRC = 0xFF; // CHECK IT: DDRC = 0x00;
  86. PORTC = PINA;
  87. // wait for button press on PORT A
  88. DDRA = 0x00; // CHECK IT: DDRA = 0x00;
  89. PORTA = 0xFF;
  90.  
  91. initializeTimer();
  92.  
  93. while (1)
  94. {
  95.  
  96. //PORTC = 0xFF;
  97. PORTC = 0b00000000;
  98. for (int i = 0;i<10; i++)
  99. {
  100. while (!(PINA != 0xFF)) {}
  101.  
  102. // put TAB_ROM to PORT C
  103. uint8_t currentValue = pgm_read_byte_far(&TAB_ROM[i]);
  104.  
  105. // delay 0.50 s
  106. while (counter025s < 2) {}
  107. counter025s = 0;
  108.  
  109. }
  110.  
  111. PORTC = 0b00001000;
  112. // delay 1.00 s
  113. while (counter025s < 4) {}
  114. counter025s = 0;
  115. PORTC = 0b00000000;
  116. }
  117. }
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