https://github.com/matveyt/avrtool
Serial programmer for AVR/Arduino
https://github.com/matveyt/avrtool
arduino avr stk500 unix windows
Last synced: about 2 months ago
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Serial programmer for AVR/Arduino
- Host: GitHub
- URL: https://github.com/matveyt/avrtool
- Owner: matveyt
- Created: 2025-09-20T09:49:21.000Z (9 months ago)
- Default Branch: master
- Last Pushed: 2025-11-03T15:32:42.000Z (8 months ago)
- Last Synced: 2025-11-03T17:23:25.730Z (8 months ago)
- Topics: arduino, avr, stk500, unix, windows
- Language: C
- Homepage:
- Size: 81.1 KB
- Stars: 0
- Watchers: 0
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
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README
### What is this
Avrtool is a serial programmer for AVR/Arduino using STK500v1 protocol. It works with
standard Arduino bootloader as well as "Arduino as ISP" programmer.
So it is sort of "replacement" for AVRDUDE with (too) little features yet easier to use.
Notes:
* Input file format (Intel HEX or Binary) is auto-detected
* To save firmware pass `--read` option
* Default serial port is `/dev/ttyUSB0` (`COM3` on Windows)
* Default port speed is 115200 bps (except for `--noreset`, it is 19200 bps)
* If MCU does not respond try manual baud setting (e.g., 57600 bps for LGT8F series)
* Automatic chip reset asserts both DTR and RTS
* Avrtool waits for connection indefinitely; press Ctrl-C to exit
* For "Arduino as ISP" `--noreset` option is required
* While reading chip any empty byte sequence (i.e., 0xff) may be removed from output
* Passing `--size` option may significantly speed up read operation
* Bootloaders may fake some commands (STK\_CHIP\_ERASE is no-op, STK\_READ\_SIGN returns
arbitrary value, etc.)
* Bootloader may overwrite itself and become non-functional; use `--size` option to set
upper memory limit and prevent this
* Fuses are supported only if STK\_UNIVERSAL command works
* AT89S chips are programmable by "Arduino as ISP"
### Build
If using GCC then simply run `make`. Otherwise, you may need to setup different compile
flags. The source code is believed to be C99 compliant.
### Use
```
Usage: avrtool [OPTION]... [FILE]
STK500v1 serial programmer. Write HEX/BIN file to AVR/Arduino.
-p, --port=PORT Select serial device
-b, --baud=BAUD Transfer baud rate
-x, --erase Always erase chip
-X, --noerase Never erase chip
-a, --base=ADDR Flash memory start address
-z, --size=NUM Flash memory maximum size
-r, --read Read memory to FILE
-n, --noreset Do not assert DTR or RTS
--lfuse=X Set low fuse
--hfuse=X Set high fuse
--efuse=X Set extended fuse
--lock=X Set lock byte
-l, --list-ports List available ports only
-h, --help Show this message and exit
```