Schematics and firmware for a portable In-Service-Programmer. It is designed to be powered by a 9V battery and uses an OLED Display module for user interaction. INTEL HEX Files can be flashed to target chips via an ISP-6 port directly from an SD-Card.
The Programmer is designed to sit on a portable ~9x11cm PCB. Eagle files for the PCB can be found in the schematics folder. Target chips can be programmed with the 6-pin Header located at the top of the PCB. There is also an 8Mhz clock pin available (TCLK) in case the target needs an external clock and none is available. BOM for the programmer can be found in schematics/bom-grouped.csv. All parts are available from DIGI-KEY. The price per assembled PCB should be around 10-30 bucks depending on the order quantity.
Aside from the programmer, there is target PCB design under schematics-target. The target can hold an ATmega328P like chip that can be programmed by connecting the target boards ISP Header to the programmer ISP-Port.
Picture of PCB revision 1 (Release_V-1.0)
| PCB | Version | Status |
|---|---|---|
| Main PCB | Hardware_V-1.0 | Pull-Ups R1, R2 are connected incorrectly (to GND instead of +5V)! Assembled and tested. Works without R1, R2. |
| Main PCB | Hardware_V-1.1 | Fixed only R1, R2 and should work better than V-1.0. Untested! |
| Main PCB | Hardware_V-1.1+ | No functional hardware change. |
| Target PCB | Hardware_V-1.2 | Assembled and tested. Fully functional. |
All .hex or .HEX files in the root folder of the SD-Card can be flashed to the target using the Programmer. The algorithm used for flashing the program to the target is very robust against weirdly formed hex files (e.g. line swaps, different lengths of lines in the same file, etc.). HEX record types 00, 01, and 02 are fully supported. Type 03 entries will be ignored with a warning sent to the programmers Serial output. Type 04 and 05 are not supported and HEX files containing those record types can't be flashed. (This shouldn't be an issue for AVR chips).
The programmer will also scan all possible bootloader positions for the current target and automatically set the fuse containing the bootloader position bits as needed.
Supported and tested
Supported not tested
Not yet supported
| Chip | Chip | ||
|---|---|---|---|
| ATmega1280 | ATmega329A | ||
| ATmega1281 | ATmega329PA | ||
| ATmega1284P | ATmega329P | ||
| ATmega1284 | ATmega329 | ||
| ATmega128A | ATmega32A | ||
| ATmega128RFA1 | ATmega32C1 | ||
| ATmega128 | ATmega32HVB | ||
| ATmega162 | ATmega32M1 | ||
| ATmega164A | ATmega32U2 | ||
| ATmega164PA | ATmega32U4 | ||
| ATmega164P | ATmega32 | ||
| ATmega165A | ATmega48A | ||
| ATmega165PA | ATmega48PA | ||
| ATmega165P | ATmega48P | ||
| ATmega168A | ATmega48 | ||
| ATmega168PA | ATmega640 | ||
| ATmega168P | ATmega644A | ||
| ATmega168V | ATmega644PA | ||
| ATmega168 | ATmega644P | ||
| ATmega169A | ATmega644 | ||
| ATmega169PA | ATmega6450A | ||
| ATmega169P | ATmega6450P | ||
| ATmega16A | ATmega6450 | ||
| ATmega16HVB | ATmega645A | ||
| ATmega16M1 | ATmega645P | ||
| ATmega16U2 | ATmega645 | ||
| ATmega16U4 | ATmega6490A | ||
| ATmega16 | ATmega6490P | ||
| ATmega2560 | ATmega6490 | ||
| ATmega2561 | ATmega649A | ||
| ATmega324A | ATmega649P | ||
| ATmega324PA | ATmega649 | ||
| ATmega324P | ATmega64A | ||
| ATmega3250A | ATmega64C1 | ||
| ATmega3250PA | ATmega64M1 | ||
| ATmega3250P | ATmega64 | ||
| ATmega3250 | ATmega8515 | ||
| ATmega325A | ATmega8535 | ||
| ATmega325PA | ATmega88A | ||
| ATmega325P | ATmega88PA | ||
| ATmega325 | ATmega88P | ||
| ATmega328P | ATmega88 | ||
| ATmega328PB | ATmega8A | ||
| ATmega328 | ATmega8U2 | ||
| ATmega3290A | ATmega8 | ||
| ATmega3290PA | At90USB82 | ||
| ATmega3290P | At90USB162 | ||
| ATmega3290 | |||
| ATtiny24 | ATtiny25 | ||
| ATtiny44 | ATtiny45 | ||
| ATtiny84 | ATtiny85 |
This is free and unencumbered software released into the public domain.
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