Tiny PIC bootloader using PIC16F microcontroller

Tiny Bootloader

This is a bootloader for the Microchip PIC microcontrollers.

• It is the smallest bootloader, taking less than 100 words of program space;
• Supports families of PIC devices: 16F, 18F, dsPIC30 (those devices that support self-programming)
• Does not support yet PIC24, dsPIC33, PIC18xxJyy

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Features of the firmware

• Size of only 100 words; (all versions, for 16F,18F,dsPIC occupy less than 100 words);
• Can write flash, eeprom and configuration bytes(18F);
• On reset, waits 1 second (adjustable) for a message from the PC, if not received, launch user application;
• The .asm file can be easily modified and adapted for any frequency (or baudrate);

Features of the PC software

• Can upload programs into flash (in current version eeprom and cfg bytes can be modified only manually, depending on the device type);
• Works with PIC16F,PIC18F and dsPIC types; automatically detects HEX content and PIC model;
• Remembers last settings;
• In case of errors, performs retransmissions or tries to resynchronize with pic;
• The communication settings are editable so you can write any COM number or desired baud;
• If a filename is specified as a command line parameter, it will automatically try to write it;

Supported/Tested Devices

Device	Devices of the same type	Flash	ram	EE	ser	adc	osc	pin
PIC 16F Family
PIC16F876	877, 873, 874
PIC16F876A	877A, 873A, 874A	8k	.3	.2	1	y		dD
PIC16F887	PIC16F886
PIC16F88	87	4k	.3	.2	1	y	y	d
PIC 18F Family
PIC18F252	452, 242, 442;  2420, 2520, 4420, 4520	16k	1.5k	.2	1a	y		dD
PIC18F258	458, 248, 448;  2480, 2580, 4480, 4580	16k	1.5k	.2	1a	y		dD	CAN
PIC18F2620	4620, 2525, 4525	32k	3.9k	1k	1e	y	y	dD
PIC18F1320	1220, 2220, 2320	4k	.2	.2	1e	y	y	d
PIC18F8720	6520, 8520, 6620, 8620, 6720; 6621	64k	3.8k	1k	2	y		Q	ext.mem.
PIC18F2550	4550, 2455, 4455	16k	1.5k	.2	1e	y	Y	dD	usb
PIC18F4431	2331, 2431, 4331	8k	.7	.2	1e	Y		dD	advPWM
PIC18F4680	2585,2680,4585	32k	3.3	1k	1	y		dD	ECAN
PIC18F4580	2480,2580,4480	16k	1.5	.2	1	y		dD	ECAN
PIC18F4620	2525,2620,4525	32k	3.9	1	1	y		dD
PIC18F4320	2220,2320,4220	4k	.5	.2	1	y		dD
dsPIC Family
Device	Devices of the same type	Flash	ram	EE	ser	adc	osc	pin
dsPIC20F2010		4k	.5	1k	1	y	y	d	6pwm
dsPIC30F6014	6012, 6013, 6011, 6012A	44k	8k	4k	2	yy	y	Q	2CAN
dsPIC30F3013	3012, 2012, 2011	8k	2k	1k	(2)	yy	YY	d
dsPIC30F4012	4011	16k	2k	1k	(2)	y	Y	dD	6pwm, CAN
dsPIC30F3011	3010	8k	1k	1k	(2)	y	Y	dD	6pwm
dsPIC30F6010		44k	8k	4k	2	y	y	Q	8pwm, 2CAN
	blue – tested for longer periods blue – verified (or user source provided) navy – reported to work (may require modifications!)	Flash, RAM, EEprom:  max. amount ser:  a=addr.; e=enh.(brg/lin) adc:  yy=12bit osc:  internal+features pin:  d<=dip28;  D=dip40;  Q>=tqfp

 

For more detail: Tiny PIC bootloader using PIC16F microcontroller

Current Project / Post can also be found using:

• pic18 rtos
• features of pic microcontroller 18 in rtos
• pic pico rtos
• pic16f bootloader