bootldr.h

Hitech microchip PIC C18 Compiler

#ifndef _BOOTLDR_H_
#define _BOOTLDR_H_

/* must be <= 9 */
#define BOOT_TIMEOUT	5
#define FILL_BYTE	0xFF

#ifndef PROG_START
  #ifdef VERBOSE
    #define PROG_START	0x300
  #else
    #define PROG_START	0x200
  #endif
#endif

/* definition ROMSIZE found in chip specific header file */
#if !defined(MPLAB_ICD)
  #define	MEM_TOP	(_ROMSIZE&0xFFFF)
  #if _ROMSIZE >= 65536
    #define UPPER_ADDRESS_BYTE	((_ROMSIZE>>16)&0xFF)
  #endif
#else
  // Don't bootload over ICD reserved region
  #define	MEM_TOP	(_ICDROM_START&0xFFFF)
  #if (_ICDROM_START) > 65536
    #define UPPER_ADDRESS_BYTE	((_ICDROM_START>>16)&0xFF)
  #endif
#endif

#if !defined(MEM_TOP)
  #error Could not determine program memory size.
#endif

// Serial communication settings
#define BAUD  9600      
#define FOSC 4000000L
#define NINE 0     /* Use 9bit communication? FALSE=8bit */
#define OUTPUT 0
#define INPUT 1

#define DIVIDER ((int)(FOSC/(16UL * BAUD) -1))
#define HIGH_SPEED 1

#if NINE == 1
#define NINE_BITS 0x40
#else
#define NINE_BITS 0
#endif

#if HIGH_SPEED == 1
#define SPEED 0x4
#else
#define SPEED 0
#endif

/* Serial initialization */
#define init_comms()						\
			{						\
				SPBRG = DIVIDER; 		    	\
				TXSTA = (SPEED|NINE_BITS|0x20);		\
				RCSTA = (NINE_BITS|0x90);		\
				TRISC=0x80;				\
 			}

/* Most flash devices write in 8 byte widths,
 * newer parts can write 32 or 64 bytes at a time.
 * If these haven't been defined by user, use defaults. */
#ifndef _FLASH_WRITE_SIZE
	#define _FLASH_WRITE_SIZE 8
#endif
#ifndef _FLASH_ERASE_SIZE
	#define _FLASH_ERASE_SIZE 64
#endif

// Check to see that legitimate values have been entered
#define _POW2(a)	(((a)&((a)-1))==0)
#define _NOT_POW2(a)	(! _POW2(a))
	
#if _NOT_POW2(_FLASH_WRITE_SIZE) || (_FLASH_WRITE_SIZE == 0) || (_FLASH_WRITE_SIZE > 128)
#error Invalid definition of _FLASH_WRITE_SIZE, must be a power of two ranging from 1 to 128
#endif
#if _NOT_POW2(_FLASH_ERASE_SIZE) || (_FLASH_ERASE_SIZE == 0) || (_FLASH_ERASE_SIZE > 128)
#error Invalid definition of _FLASH_ERASE_SIZE, must be a power of two ranging from 1 to 128
#endif


#ifndef NOP()
#define NOP()	asm("nop")
#endif

#ifndef RESET()
#define RESET()	asm("reset")
#endif

/* test conditions */
#define FLASH EEPGD==1
#define EEPROM EEPGD==0
#define CONFIG CFGS==1

/* hex record types */
#define DATA 0
#define END 1
#define EXTEND_ADDRESS 4

#endif