https://www.marcelpost.com/wiki/index.php?action=history&feed=atom&title=Mcu_0088-AVR-programmerMcu 0088-AVR-programmer - Revision history2026-05-17T04:57:35ZRevision history for this page on the wikiMediaWiki 1.39.17https://www.marcelpost.com/wiki/index.php?title=Mcu_0088-AVR-programmer&diff=1313&oldid=prevAdmin at 10:49, 12 January 20142014-01-12T10:49:44Z<p></p>
<p><b>New page</b></p><div>The finished result of this project is to create an AVR-compatible In-Circuit Serial Programmer using an ATtiny85 as the controller. The board will interface using the open-source USB protocol and is able to program a range of AVR compatible microcontrollers with it. The cost is around $16 for which you can easily purchase a fully assembled and tested device, but I just found it so neat to be able to create my own programmer.<br />
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The schematic, code and drivers listed on this page are mostly all works of others so I will not take credit for that. I merely have this page here to show you how it's done and what the end result looks like.<br />
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* source code<br />
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* binary (.HEX)<br />
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Firmware version 1.3<br />
[[File:Littlewire v13.zip]]<br />
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Firmware version 1.1<br />
[[File:Combined.zip]]<br />
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* program the programmer<br />
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I used a pololu programmer to program this project onto a new ATtiny85 microcontroller.<br />
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These are the commands to flash the hex file into the chip:<br />
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(I copied the contents of a little batch file)<br />
<pre><br />
set PROJECT=littlewire_v13<br />
set PORT=\\.\USBSER000<br />
set GCC_DEVICE=attiny85<br />
set PGM_DEVICE=t85<br />
set PGM_PROTO=avrispv2<br />
<br />
echo erase chip<br />
avrdude -c %PGM_PROTO% -P %PORT% -p %PGM_DEVICE% -e<br />
<br />
echo write program to chip<br />
avrdude -c %PGM_PROTO% -P %PORT% -p %PGM_DEVICE% -U flash:w:%PROJECT%.hex -U lfuse:w:0xe1:m -U hfuse:w:0x5d:m -U efuse:w:0xfe:m<br />
</pre><br />
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* Final result<br />
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<br />
* usage instructions<br />
<br />
Before I created my own programmer I was using the (also very simple) programmer from Pololu. In order to program avr's with this programmer I used the following avrdude command line:<br />
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Pololu programmer avrdude command to program an ATtiny85<br />
<pre><br />
set PORT=\\.\USBSER000<br />
set PGM_PROTO=avrispv2<br />
avrdude -F -c %PGM_PROTO% -P %PORT% -p t85 -U flash:w:myproject.hex -D<br />
</pre><br />
<br />
With the new programmer I have to change things slightly, just tell avrdude we're using a different programmer:<br />
<pre><br />
set PORT=\\.\USBSER000<br />
set PGM_PROTO=usbtiny<br />
avrdude -F -c %PGM_PROTO% -P %PORT% -p t85 -U flash:w:myproject.hex -D<br />
</pre><br />
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* drivers for windows<br />
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[[File:LittleWire driver.zip]]<br />
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NOTE: the drivers for Linux are already supported in recent Linux kernels.<br />
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<br />
* source design from LittleWire<br />
<br />
http://littlewire.cc/</div>Admin