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microcontroller_annoyances [2008/06/10 16:48]
pcbgcode Added precautions for using debugWIRE
microcontroller_annoyances [2013/01/10 02:08]
daviddavid
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 ====== AVRs ====== ====== AVRs ======
 +
  
 ===== Calculating Fuses ===== ===== Calculating Fuses =====
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 WinAVR is great, better than AVR studio but there'​s no nice fuse selector like there is with AVR studio. Luckily there are two calculators WinAVR is great, better than AVR studio but there'​s no nice fuse selector like there is with AVR studio. Luckily there are two calculators
   - [[http://​www.vonnieda.org/​AVRFuses/​ | AVRFuses]] is a simple fuse programmer for the AVR series of microcontrollers from Atmel. It is written in C#.NET with the intention of being cross platform compatible with Windows, OS X and Linux. It is written to mimic the look, feel and utility of the AVR Studio fuse programmer.   - [[http://​www.vonnieda.org/​AVRFuses/​ | AVRFuses]] is a simple fuse programmer for the AVR series of microcontrollers from Atmel. It is written in C#.NET with the intention of being cross platform compatible with Windows, OS X and Linux. It is written to mimic the look, feel and utility of the AVR Studio fuse programmer.
-  - [[http://palmavr.sourceforge.net/​cgi-bin/​fc.cgi | AVR Fuse Calculator]] is a webpage that does it all +  - [[http://www.engbedded.com/​cgi-bin/​fc.cgi| AVR Fuse Calculator]] is a webpage that does it all 
  
 ===== Fixing fuses ===== ===== Fixing fuses =====
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 So make sure to always use BOD fuses! So make sure to always use BOD fuses!
 +
 +===== EEPROM corruption from brownouts =====
 +Brownouts can cause the first location of the on-board EEPROM to be overwritten.
 +
 +''​In addition to the precautions elsewhere on this Wiki, consider not using the first EEPROM location.''​
 +
  
 ===== Brownout fuses ===== ===== Brownout fuses =====
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 MOSI -> PE0, MISO -> PE1, SCK -> PB1 // --- //​[[http://​www.avrfreaks.net/​wiki/​index.php/​Documentation:​Things_That_Are_Broken|AVR Wiki]]// MOSI -> PE0, MISO -> PE1, SCK -> PB1 // --- //​[[http://​www.avrfreaks.net/​wiki/​index.php/​Documentation:​Things_That_Are_Broken|AVR Wiki]]//
  
 +===== SPI Master mode =====
 +On some (all?) AVRs, if the SPI slave select (SS_) pin is an input and low, then the SPI interface will go into slave mode, even if you have previously selected master mode.  Hope you weren'​t using that pin for something else.
  
 ====== PIC ====== ====== PIC ======
/home/ladyada/public_html/wiki/data/pages/microcontroller_annoyances.txt · Last modified: 2016/01/28 18:05 (external edit)