GPIO程序

bigao • • 嵌软技术文章 • 438 阅读
  2. #include "DSP28_Device.h"
  3. #include "DSP28_Globalprototypes.h"
  5. // Prototype statements for functions found within this file.
  6. // interrupt void ISRTimer2(void);
  7. void delay_loop(void);
  8. void Gpio_select(void);
  10. unsigned int var1 = 0;
  11. unsigned int var2 = 0;
  12. unsigned int var3 = 0;
  13. unsigned int var4 = 0;
  14. unsigned int var5 = 0;
  16. void main(void)
  17. {
  19. int ii=0;
  20. int i;
  21. InitSysCtrl();
  22. // Disable and clear all CPU interrupts:
  23. DINT;
  24. IER = 0x0000;
  25. IFR = 0x0000;
  27. // Initialize Pie Control Registers To Default State:
  28. InitPieCtrl();
  30. InitPieVectTable();
  31. InitGpio();
  33. // Run GPIO test
  34. var1 = 0x0000; // sets GPIO Muxs as I/Os
  35. var2 = 0xFFFF; // sets GPIO DIR as outputs
  36. var3 = 0x0000; // sets the Input qualifier values
  37. // Gpio_select();
  38. // Toggle I/Os using DATA register for ever
  39. while(1)
  40. {
  41. /*
  43. GpioDataRegs.GPADAT.all = 0x000A;
  45. for(ii = 0; ii < 100; ii++)
  46. {
  47. delay_loop();
  48. }
  50. GpioDataRegs.GPADAT.all = 0x0005;
  52. delay_loop();
  53. for(ii = 0; ii < 100; ii++)
  54. {
  55. delay_loop();
  56. }
  57. */
  59. for(i = 0; i < 4; i++)
  60. {
  61. GpioDataRegs.GPADAT.all = 0x08 >> i;
  62. for(ii = 0; ii < 50; ii++)
  63. {
  64. delay_loop();
  65. }
  66. GpioDataRegs.GPACLEAR.all = 0x08 >> i;
  68. for(ii = 0; ii < 10; ii++)
  69. {
  70. //delay_loop();
  71. }
  74. }
  75. }
  76. }
  78. void delay_loop()
  79. {
  80. short i;
  81. for (i = 0; i < 5000; i++) {}
  82. }
  84. void Gpio_select(void)
  85. {
  86. EALLOW;
  87. GpioMuxRegs.GPAMUX.all=var1;
  88. // GpioMuxRegs.GPBMUX.all=var1;
  89. GpioMuxRegs.GPADIR.all=var2; // GPIO PORTs as output
  90. // GpioMuxRegs.GPBDIR.all=var2; // GPIO DIR select GPIOs as output
  92. GpioMuxRegs.GPAQUAL.all=var3; // Set GPIO input qualifier values
  93. // GpioMuxRegs.GPBQUAL.all=var3;
  94. EDIS;
  95. }
以上是GPIO程序的全部内容。
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