松翰5703例程-WDT

  1. //--------------------------------------------------------------------------
  2. //Filename        : STOP_Mode.c
  3. //Function        : Use watch dog timer to Power save application when SN8F5708 run as stop mode.
  4. //description        : SN8F5708 be waked up by watch dog reset.
  5. //--------------------------------------------------------------------------
  6. //Note:
  7. //     1)User need to add the STARTUP.A51 file which in this project to your project.
  8. //     2)The STARTUP.A51 file has been modified for the Watchdog wakeup function.
  9. //     3)User need to Reset the source which has used according to the PFLAG register.
  10. //--------------------------------------------------------------------------

  12. #include <SN8F5703.h>

  14. #define uchar unsigned char
  15. #define uint unsigned int

  17. uchar RCycle_CNT;
  18. //--------------------------------------------------------------------------
  19. //subroutine        : main()
  20. //Function                :
  21. //--------------------------------------------------------------------------
  22. void main(void)
  23. {
  24. CLKSEL = 0x03;                                //Fcpu=Fosc/16
  25. //        CLKSEL = 0x04;                                //Fcpu=Fosc/8
  26. //        CLKSEL = 0x05;                                //Fcpu=Fosc/4
  27. CLKCMD = 0x69;
  28. CKCON = 0x11;

  30. WDTR = 0X5A;

  32. if((PFLAG&0X40)==0X40)        //Watchdog Reset
  33. {
  34. P0UR = 0X00;
  35. P0 = 0X00;
  36. P0M = 0XFF;

  38. P1UR = 0X00;
  39. P1 = 0X00;
  40. P1M = 0XFF;

  42. P2UR = 0X00;
  43. P2 = 0X00;
  44. P2M = 0XFF;
  45. }
  46. else                                                                                //Other Reset
  47. {
  48. P0UR = 0X00;
  49. P0 = 0XFF;
  50. P0M = 0XFF;

  52. P1UR = 0X00;
  53. P1 = 0X00;
  54. P1M = 0XFF;

  56. P2UR = 0X00;
  57. P2 = 0X00;
  58. P2M = 0XFF;
  59. }

  61. while(1)
  62. {
  63. WDTR = 0X5A;
  64. RCycle_CNT++;
  65. P2 = RCycle_CNT;                //P2 output registor data
  66. P1W = 0X00;                                        //Set P1 port wake up source, if enable, user need to set port as input mode
  67. STOP();
  68. }
  69. }