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Exercise I/O on OSR USB-FX2 board (Cypress) using Keil compiler

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  1. //-----------------------------------------------------------------------------
  2. // File:      OsrUsbFx2_io.c
  3. // Contents:  Exercise I/O on OSR USB-FX2 board.
  4. // 
  5. // Route switches to the bar LEDs.
  6. // 7-seg LED just 'spins', displaying a pattern.
  7. // Uses EzUsb.LIB.
  8. //
  9. // Tools:
  10. //   Compiled using Keil uVision (.uv2) on Windows XP.
  11. //   Expect no errors or warnings.
  12. //   Download the resulting .hex file (OsrUsbFx2_io.hex) using a utility like EzMr.
  13. //   Remove OSR USB-FX2 eeprom for EzMr to connect to it.
  14. //
  15. // Mapping of Cypress port I/O to OSR USB-FX2 board:
  16. //   Port A is the switches, SW1.
  17. //     PA0 is on the right.
  18. //     PA7 is on the left.
  19. //     1 is OFF, 0 is ON.
  20. //   Port B is the 7-segment display, DN1.
  21. //      ==0== 
  22. //     #     #
  23. //     6     1
  24. //     #     #
  25. //      ==5== 
  26. //     #     #
  27. //     4     2
  28. //     #     #
  29. //      ==7==   (3)
  30. //
  31. //   Port D is the 10 - LED bar display, DN2. 1 is OFF, 0 is ON.
  32. //     0 - nc
  33. //     1 - nc
  34. //     2 - PD4
  35. //     3 - PD3
  36. //     4 - PD2
  37. //     5 - PD1
  38. //     6 - PD0
  39. //     7 - PD7
  40. //     8 - PD6
  41. //     9 - PD5
  42. // 
  43. //-----------------------------------------------------------------------------
  44.  
  45. #include "fx2.h"    // needed by fx2regs.h
  46. #include "fx2regs.h" // needed for port identifiers such as IOB etc.
  47.  
  48.  
  49. main()
  50. {
  51.    // Set output-enables for ports A, B and D.
  52.    OEA =    0;   // all inputs.
  53.    OEB = 0xFF;   // all outputs.
  54.    OED = 0xFF;   // all outputs.
  55.  
  56.    while (TRUE)
  57.    {
  58.       static BYTE pattern7Seg[] = { 1, 2, 0x04, 0x80, 0x10, 0x40 }; // Create table for 7-seg pattern.
  59.       static BYTE x = 0;
  60.  
  61.       IOB = ~pattern7Seg[x]; // Write a table element to 7-seg display.
  62.       x++; // Next table element.
  63.       if ( x>=sizeof( pattern7Seg ) ) { x=0; } // wrap-around.
  64.  
  65.       // Route swtiches to corresponding LED.
  66.       // Note that the order of the switches and the order of the LEDs isn't intuitive.
  67.       // Route such that the left switch controls the top LED and the right swtich controls the bottom LED.
  68.       PD4 = PA7;
  69.       PD3 = PA6;
  70.       PD2 = PA5;
  71.       PD1 = PA4;
  72.       PD0 = PA3;
  73.       PD7 = PA2;
  74.       PD6 = PA1;
  75.       PD5 = PA0;
  76.  
  77.       EZUSB_Delay(100);
  78.    } // while.
  79. } // main.

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