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	<title>Objective Development Forums</title>
	
	<link href="https://forums.obdev.at/index.php" />
	<updated>2007-04-13T20:02:57+02:00</updated>

	<author><name><![CDATA[Objective Development Forums]]></name></author>
	<id>https://forums.obdev.at/app.php/feed/topic/368</id>

		<entry>
		<author><name><![CDATA[christian]]></name></author>
		<updated>2007-04-13T20:02:57+02:00</updated>

		<published>2007-04-13T20:02:57+02:00</published>
		<id>https://forums.obdev.at/viewtopic.php?t=368&amp;p=1214#p1214</id>
		<link href="https://forums.obdev.at/viewtopic.php?t=368&amp;p=1214#p1214"/>
		<title type="html"><![CDATA[avrdude: initialization failed, rc=-1]]></title>

		
		<content type="html" xml:base="https://forums.obdev.at/viewtopic.php?t=368&amp;p=1214#p1214"><![CDATA[
Yes, you need a CMOS buffer chip. The HCT126 is preferred.<br /><br />The buffer allows for differences in supply voltage between programmer and target. If you don't need this feature, a version without buffer chip is (in principle) possible.<br /><br />Any volunteers who design a version and firmware patch to work without the buffer? The firmware patch should be quite simple, see the file isp.c for details.<p>Statistics: Posted by <a href="https://forums.obdev.at/memberlist.php?mode=viewprofile&amp;u=8">christian</a> — Fri Apr 13, 2007 8:02 pm</p><hr />
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	</entry>
		<entry>
		<author><name><![CDATA[Anonymous]]></name></author>
		<updated>2007-04-10T05:19:11+02:00</updated>

		<published>2007-04-10T05:19:11+02:00</published>
		<id>https://forums.obdev.at/viewtopic.php?t=368&amp;p=1179#p1179</id>
		<link href="https://forums.obdev.at/viewtopic.php?t=368&amp;p=1179#p1179"/>
		<title type="html"><![CDATA[Inverter]]></title>

		
		<content type="html" xml:base="https://forums.obdev.at/viewtopic.php?t=368&amp;p=1179#p1179"><![CDATA[
Yes. The problem is with the inverters. Don't ask me why (it might be because of a slightly higher swing voltage required) but any other 74* series chip will not work. I ran through the same problem, until I found a lcoal supplier which had _five_ units left. Needless to say, I grabbed them all up <img class="smilies" src="./../../../images/smilies/icon_wink.gif" alt=";)" title="Wink" /><br /><br />Best of luck finding a supplier!<br /><br />Take care<p>Statistics: Posted by Guest — Tue Apr 10, 2007 5:19 am</p><hr />
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	</entry>
		<entry>
		<author><name><![CDATA[Anonymous]]></name></author>
		<updated>2007-04-08T10:43:55+02:00</updated>

		<published>2007-04-08T10:43:55+02:00</published>
		<id>https://forums.obdev.at/viewtopic.php?t=368&amp;p=1151#p1151</id>
		<link href="https://forums.obdev.at/viewtopic.php?t=368&amp;p=1151#p1151"/>
		<title type="html"><![CDATA[avrdude: initialization failed, rc=-1]]></title>

		
		<content type="html" xml:base="https://forums.obdev.at/viewtopic.php?t=368&amp;p=1151#p1151"><![CDATA[
Hi, I'am asking for help with this project <!-- m --><a class="postlink" href="http://www.rototron.info/?Page=USBAVR/USBAVR.ASPX">http://www.rototron.info/?Page=USBAVR/USBAVR.ASPX</a><!-- m -->. I can't make it to work. I've done everything excatly as the scheme with one exception I replace this part 74HC126 by this 74LS126 (problem with buy). I'am trying to program Atmega with any kind of hex, and i've got always the same error:<br /><br /><br />avrdude: stk500v2_command(): command failed<br />avrdude: initialization failed, rc=-1<br />Double check connections and try again, or use -F to override<br />this check.<br /><br />Maybe this wil help:<br /><div class="codebox"><p>Code: </p><pre><code><br />C:\WinAVR\bin&gt;avrdude -c stk500v2 -p m8 -P avrdoper -v -u -U flash:w:test.hex<br /><br />avrdude: Version 5.3.1, compiled on Feb  8 2007 at 14:26:28<br />         Copyright &#40;c&#41; 2000-2005 Brian Dean, http://www.bdmicro.com/<br /><br />         System wide configuration file is &quot;C:\WinAVR\bin\avrdude.conf&quot;<br /><br />         Using Port            : avrdoper<br />         Using Programmer      : stk500v2<br />         AVR Part              : ATMEGA8<br />         Chip Erase delay      : 10000 us<br />         PAGEL                 : PD7<br />         BS2                   : PC2<br />         RESET disposition     : dedicated<br />         RETRY pulse           : SCK<br />         serial program mode   : yes<br />         parallel program mode : yes<br />         Timeout               : 200<br />         StabDelay             : 100<br />         CmdexeDelay           : 25<br />         SyncLoops             : 32<br />         ByteDelay             : 0<br />         PollIndex             : 3<br />         PollValue             : 0x53<br />         Memory Detail         :<br /><br />                                  Block Poll               Page<br />      Polled<br />           Memory Type Mode Delay Size  Indx Paged  Size   Size #Pages MinW  Max<br />W   ReadBack<br />           ----------- ---- ----- ----- ---- ------ ------ ---- ------ ----- ---<br />-- ---------<br />           eeprom         4    10   128    0 no        512    0      0  9000  90<br />00 0xff 0xff<br />           flash         33     6    64    0 yes      8192   64    128  4500  45<br />00 0xff 0x00<br />           lfuse          0     0     0    0 no          1    0      0  2000  20<br />00 0x00 0x00<br />           hfuse          0     0     0    0 no          1    0      0  2000  20<br />00 0x00 0x00<br />           lock           0     0     0    0 no          1    0      0  2000  20<br />00 0x00 0x00<br />           calibration    0     0     0    0 no          4    0      0     0<br /> 0 0x00 0x00<br />           signature      0     0     0    0 no          3    0      0     0<br /> 0 0x00 0x00<br /><br />         Programmer Type : STK500V2<br />         Description     : Atmel STK500 Version 2.x firmware<br />         Programmer Model: STK500<br />         Hardware Version: 1<br />         Firmware Version: 2.04<br />         Topcard         : STK501<br />         Vtarget         : 4.8 V<br />         Varef           : 0.0 V<br />         Oscillator      : 1.229 MHz<br />         SCK period      : 2.2 us<br /><br />avrdude: stk500v2_command&#40;&#41;: command failed<br />avrdude: initialization failed, rc=-1<br />         Double check connections and try again, or use -F to override<br />         this check.<br /><br /><br />avrdude done.  Thank you.<br /></code></pre></div><br /><br />Atmega is connected to programmer in this way:<br />MOSI &gt; 17<br />MISO &gt; 18<br />SCK &gt; 19<br />RESET &gt; 1<br />GROUND &gt; 8 <br /><br />and the 4.5V power from battery.<br /><br />Is it possible that problem is in that part replacement ?<p>Statistics: Posted by Guest — Sun Apr 08, 2007 10:43 am</p><hr />
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