“variable must be const” fix for Arduino progrem

Using the source from this link I got it to compile following these steps.

• Before opening the sketch in the Arduino:
  • Rename TVB.pde to TVB.ino
  • Rename WORLDcodes.cpp to WORLDcodes.h

• Open the sketch (TVB.ino) in the Arduino IDE

• Edit main.h and change:

  // The structure of compressed code entries
  struct IrCode {
    uint8_t timer_val;
    uint8_t numpairs;
    uint8_t bitcompression;
    uint16_t const *times;
    uint8_t const*codes;
  };
  

  to:

  // The structure of compressed code entries
  struct IrCode {
    uint8_t timer_val;
    uint8_t numpairs;
    uint8_t bitcompression;
    uint16_t const *times;
    uint8_t const*codes PROGMEM;
  };
  

  That is, add PROGMEM to the codes line.

• Edit TVB.ino and change:

  extern PGM_P *NApowerCodes[] PROGMEM;
  extern PGM_P *EUpowerCodes[] PROGMEM;
  extern uint8_t num_NAcodes, num_EUcodes;
  

  to:

  #include "WORLDcodes.h"
  

  This avoids some linker problems in the original code.

• Edit WORLDcodes.h and delete the line:

   #include "main.h"
  

• Continue editing WORLDcodes.h and change:

  const struct IrCode *NApowerCodes[] PROGMEM = {
  

  to:

  const struct IrCode * const NApowerCodes[] PROGMEM = {
  

  ---

  And also change:

  const struct IrCode *EUpowerCodes[] PROGMEM = {
  

  to:

  const struct IrCode * const EUpowerCodes[] PROGMEM = {
  

It should now compile OK.