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flash_the_atmega [2013/10/05 11:41] – [General] breaker27flash_the_atmega [2023/03/01 19:40] (current) – [Using flash scripts] breaker27
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 You can either take a pre-built firmware package from [[http://www.smarthomatic.org/builds/builds.html]] or [[build your own firmware|build your own firmware]]. If you take the prebuilt package, extract it to a directory of your choice. You can either take a pre-built firmware package from [[http://www.smarthomatic.org/builds/builds.html]] or [[build your own firmware|build your own firmware]]. If you take the prebuilt package, extract it to a directory of your choice.
  
-====== General ======+====== Three different storage areas ======
  
 Every microcontroller has three parts that can be flashed (written): Every microcontroller has three parts that can be flashed (written):
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   * The **EEPROM memory** contains (firmware) configuration data. It is also written to by the device in normal operation. It can we overwritten about 100.000 times.   * The **EEPROM memory** contains (firmware) configuration data. It is also written to by the device in normal operation. It can we overwritten about 100.000 times.
  
-{{danger.gif}} **In general, it's a good idea to only flash what you need to, because the limited amount of possible write cycles.**+{{danger.gif}} **In general, it's a good idea to only flash what you need to, because of the limited amount of possible write cycles.**
  
 ====== Programming fuses ====== ====== Programming fuses ======
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 (replace ?? by the hex value for the needed fuse settings and use "lfuse", "hfuse" or "efuse" accordingly). (replace ?? by the hex value for the needed fuse settings and use "lfuse", "hfuse" or "efuse" accordingly).
  
-====== Flashing the firmware======+===== Strange avrdude error messages ===== 
 + 
 +Some fuses only use a part of their bits. If you set such a fuse, avrdude may complain at verification that it read out another value than it wrote. 
 + 
 +Writing the EFuse of the ATMega168 or 328 returns a value of only the last 3 bits (upper 5 unused), so a value of xxxxxyyy is read out as 00000yyy. Example: 
 + 
 +<code> 
 +avrdude: verification error, first mismatch at byte 0x0000 
 +         0xfc != 0x04 
 +avrdude: verification error; content mismatch 
 +</code> 
 + 
 +Don't worry. The warning is only returned because avrdude does not know that the upper 5 bits are always 1 (as per spec). 
 + 
 +====== Flashing the firmware / eeprom ======
  
 ===== Using flash scripts ===== ===== Using flash scripts =====
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   * **flash.cmd** / **flash.sh** for flashing firmware, eeprom and fuses   * **flash.cmd** / **flash.sh** for flashing firmware, eeprom and fuses
   * **flash_firmware.cmd** / **flash_firmware.sh** for flashing only the firmware   * **flash_firmware.cmd** / **flash_firmware.sh** for flashing only the firmware
-  * FIXME: The Linux scripts do not exist yet. 
  
 ===== Using a make rule ===== ===== Using a make rule =====
flash_the_atmega.1380966063.txt.gz · Last modified: 2013/10/05 11:41 by breaker27