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
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 |
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| 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 |
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| 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 |
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| 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 |
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For more detail: Tiny PIC bootloader using PIC16F microcontroller
About The Author
Ibrar Ayyub
I am an experienced technical writer with a Master's degree in computer science from BZU Multan University. I have written for various industries, mainly home automation, and engineering. I have a clear and simple writing style and am skilled in using infographics and diagrams. I am a great researcher and is able to present information in a well-organized and logical manner.