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The function avr_set_addr_mem(AVRMEM *mem, int opnum, unsigned char *cmd, unsigned long addr) is meant to replace avr_set_addr(OPCODE *op, unsigned char *cmd, unsigned long addr) in future. avr_set_addr_mem() has more information about the context of the task in that it knows the memory size, memory page size, whether or not the memory is a flash memory (which gets words addressees supplied) and, crucially, knows which SPI operation it is meant to compute the address bits for. avr_set_addr_mem() first computes the interval of bit numbers that must be supplied for the SPI command to stand a chance to work. The function only sets those address bits that are needed. Once all avr_set_addr() function calls have been replaced by avr_set_addr_mem(), the SPI commands that need an address can afford to declare in avrdude.conf all 16 address bits in the middle two bytes of the SPI command. This over-declaration will be corrected during runtime by avr_set_addr_mem(). One consequence of this is that parts can inherit smaller or larger memories from parents without the need to use different SPI codes in avrdude.conf. Another consequence is that avr_set_addr_mem() can, and does, tell the caller whether vital address bits were not declared in the SPI opcode. During parsing of avrdude.conf this might be utilised to generate a corresponding warning. This will uncover problematic SPI codes in avrdude.conf that in the past went undetected. |
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README.md
AVRDUDE
AVRDUDE - AVR Downloader Uploader - is a program for downloading and uploading the on-chip memories of Microchip’s AVR microcontrollers. It can program the Flash and EEPROM, and where supported by the programming protocol, it can program fuse and lock bits. AVRDUDE also supplies a direct instruction mode allowing one to issue any programming instruction to the AVR chip regardless of whether AVRDUDE implements that specific feature of a particular chip.
AVRDUDE was originally written in 2003 by Brian S. Dean. Since 2006, AVRDUDE has been maintained by Jörg Wunsch, with the help of various contributors.
The latest version of AVRDUDE is always available here:
https://github.com/avrdudes/avrdude
Documentation
Documentation for current and previous releases is on Github Pages.
Getting AVRDUDE for Windows
To get AVRDUDE for Windows, install the latest version from the Releases page.
Alternatively, you may build AVRDUDE yourself from source.
Getting AVRDUDE for Linux
To install AVRDUDE for Linux, install the package avrdude by running the following commands:
sudo apt-get install avrdude
Alternatively, you may build AVRDUDE yourself from source.
Getting AVRDUDE for MacOS
On MacOS, AVRDUDE can be installed through Mac Ports.
Alternatively, you may build AVRDUDE yourself from source.
Using AVRDUDE
AVRDUDE is a command-line application. Run the command avrdude without any arguments for a list of options.
A typical command to program your HEX file into your AVR microcontroller looks like this:
avrdude -c <programmer> -p <part> -U flash:w:<file>:i
For instance, to program an Arduino Uno connected to the serial port COM1 with a HEX file called blink.hex,
you would run the following command:
avrdude -c arduino -P COM1 -b 115200 -p atmega328p -D -U flash:w:objs/blink.hex:i
There are many different programmers and options that may be required for the programming to succeed.
For more information, refer to the AVRDUDE documentation.