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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3. #include <time.h>
  4.  
  5. #define uchar unsigned char
  6. #define uint unsigned int
  7.  
  8. void secint(void);			//timer isr per second
  9. void print_byte(char byte);	//converted to binary formatted
  10.  
  11. struct{
  12. 	uint delay;
  13. 	uchar pattern;
  14. } cycle[] = {
  15.  
  16. {1, 0x12},	//0
  17. {3, 0x41},	//1
  18. {1, 0x21},	//2
  19. {5, 0x14},	//3
  20. {3, 0xc1},	//4
  21. {5, 0x1c}	//5
  22. };
  23.  
  24. const char* bit_rep[16] = {
  25. 	[ 0] = "0000", [ 1] = "0001", [ 2] = "0010", [ 3] = "0011",
  26. 	[ 4] = "0100", [ 5] = "0101", [ 6] = "0110", [ 7] = "0111",
  27. 	[ 8] = "1000", [ 9] = "1001", [10] = "1010", [11] = "1011",
  28. 	[12] = "1100", [13] = "1101", [14] = "1110", [15] = "1111",
  29. };
  30.  
  31. uchar walk, LEDS;
  32.  
  33. void main(void){
  34. 	/*initialize*/
  35. 	clock_t start_t = 0, end_t = 0;
  36.  
  37. 	while(1){
  38. 		if(end_t-start_t){
  39. 			start_t = end_t;
  40. 			/*inerrupt function*/
  41. 			secint();
  42. 		}
  43. 		else{
  44. 			end_t = clock() / CLOCKS_PER_SEC;
  45. 		/*main program*/
  46. 			walk=2;
  47. 		}
  48. 	}
  49. 	printf("should not be here\n");
  50. }
  51.  
  52. void secint(void){
  53. 	static uchar count;
  54. 	static uchar index;
  55. 	static uint countdown;
  56. 	uchar i;
  57.  
  58. 	count++;
  59. 	printf("count = %d\n",count);
  60. 	LEDS=cycle[i].pattern; print_byte(LEDS);
  61. 	countdown = cycle[i].delay;
  62.  
  63. 	if(--countdown == 0){
  64. 		index++;
  65. 		if(index==4)index=0;
  66. 		switch(index){
  67. 			case 1:
  68. 				if((walk&0x2) == 2){
  69. 					printf("should be here\n");
  70. 					walk = walk & 0xfd;
  71. 					printf("walk = %d\n", walk);
  72. 					i=index+3;
  73. 					printf("i = %d\n", i);
  74. 				}
  75. 				break;
  76. 			case 3:
  77. 				if((walk&0x1) == 1){
  78. 					walk= walk & 0xfe;
  79. 					i=index+2;
  80. 				}
  81. 				break;
  82. 			default: i=index;
  83. 		}
  84. 	}
  85. }
  86. void print_byte(char byte){
  87. 	printf("%s %s\n", bit_rep[byte>>4], bit_rep[byte&0x0f]);
  88. }
  89.  
Time limit exceeded #stdin #stdout 5s 9424KB
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https://ideone.com/kP8qHo
language:
C (gcc 8.3)
created:
7 years ago
visibility:
public

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