![]() To exclude unnecessary library references perform garbage collection: -ffunction-sections -fdata-sections -Wl,-gc-sections. It is common practice to enable GCC optimization level -Os and turn on some extra features: -funsigned-char -funsigned-bitfields -fpack-struct -fshort-enums. A lot of new chips comes with 1 MHz speed settings so using 125 kHz as starting value should be fine enough.īecause AVRs come with tight flash ROM size and relatively weak CPUs you can consider some optimizations to improve space usage and overall performance of your device. Just remember that ISP programming speed should not exceed 1/8 of MCU's working frequency. $ avrdude -p atmega8 -c avrispmkII -B 125kHz -U lfuse:w:0x9F:m -U hfuse:w:0xD1:m For example, to set up low and high fuses to the 0x9F and 0xD1 respectively use the following incantation: Among other things avrdude can work with EEPROM memory, fuse and lock bits. $ avrdude -p atmega8 -c avrispmkII -B 125kHz -U flash:w:main.hex Then run avrdude and specify flash ROM as destination for formware burning (in this example AVRISP mkII is used and clock speed is lowered to the 125 kHz to be on safe side): $ avr-gcc -DF_CPU=8000000UL -mmcu=atmega8a -std=gnu99 main.c -o main.elfĪvrdude is smart enough to work with the resulting ELF file but you can convert it explicitly to Intel HEX: You should only specify target MCU (full list of supported MCUs could be found with avr-gcc(1) § mmcu=) and its working frequency: To compile C program for AVR chip (let us consider ATmega8A running at 8 MHz as example) you can use avr-gcc directly. Replace the italic parts with your programmer's vendor and product IDs (these can be found with the lsusb command from usbutils) and add the uucp group to your user's supplementary groups. SUBSYSTEM="usb", ATTRS=" your Product ID", GROUP="uucp", MODE="0666" etc/udev/rules.d/les # Set group for a programmer matching with vendor and product IDs To be able to run avrdude without superuser rights, a Udev rule needs to be created to change ownership of the usb device to another group (the commonly used group for this is uucp): There also exists a simple DIY-programmer which works with LPT port. Most popular programmers are USBasp, AVRISP mkII, Atmel-ICE and STK500. To flash compiled firmware to the AVR chip you will need programmer and software to rule it. Install avr-gcc to get toolchain and GNU compiler. This page deals with 8-bit series of these MCUs. AVRs are especially common in hobbyist and educational embedded applications, popularized by Arduino project. Sections show the year of the latest release.AVR is a family of microcontrollers (MCUs) developed by Microchip Technology (former AVR). These distributions are no longer developed, but show some of the history surrounding Arch Linux and the greater FOSS community. RebornOS *2017, previously Antergos Deepin.BlackArch Linux *2014, previously ArchTrack.Artix Linux *2016, previously Arch-OpenRC.ArchStrike *2014, previously ArchAssault.Arch Linux ARM *2009, previously Arch Linux Mobile, PlugApps, PlugBox.SourceForge project links are preferred to simplify maintenance.Īsterisk indicates the year of first public release based on Arch Linux. Although it intends to be as comprehensive as possible, it is not an exhaustive list. This page lists OS distributions which are derived from Arch Linux either in whole or in part, to help enforce the Arch Linux trademark policy. Note: Please use the discussion page to suggest edits to this article: Talk:Arch-based distributions.
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