YASAB - Yet another simple AVR Bootloader
YASAB is a simple AVR Bootloader, written in C for the AVR libc. A PC Program sends the data to be programmed with a simple protocol via UART to the AVR. If the bootloader was compiled for the ATmega168, 128x or 256x, it will listen on both USART0 and USART1 for serial communication attempts. The most recent source code can be found in the Github Repository. The Upload software can easily be used in place of avrdude in makefiles.
yasab /dev/tty.usbserial-A100QOUE test.hex q Hex File Path : test.hex Minimum Address : 0x0 Maximum Address : 0x61E2 Data payload : 25068 bytes Pinging bootloader... Stop with CTRL+C Got response... Acknowledging... Connection established successfully! Sending target address... Sending data length... 100% (25068 / 25068) 195 page(s) written! Upload finished after 28.0 seconds.