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bug #37942: Latest SVN can't program in dragon_jtag mode

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* jtagmkII.c (jtagmkII_initialize): For Xmega devices, and
firmware >= 7.x, don't trigger a RESET, in order to work around a
firmware bug that appears to be present in at least firmware 7.24
for the Dragon.



git-svn-id: svn://svn.savannah.nongnu.org/avrdude/trunk/avrdude@1125 81a1dc3b-b13d-400b-aceb-764788c761c2
This commit is contained in:
Joerg Wunsch
2012-12-18 09:20:06 +00:00
parent 34a01cf0ac
commit 93d4697961
3 changed files with 25 additions and 2 deletions
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18
jtagmkII.c
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@@ -1435,8 +1435,22 @@ static int jtagmkII_initialize(PROGRAMMER * pgm, AVRPART * p)
}
PDATA(pgm)->flash_pageaddr = PDATA(pgm)->eeprom_pageaddr = (unsigned long)-1L;
if (jtagmkII_reset(pgm, 0x01) < 0)
return -1;
if (PDATA(pgm)->fwver >= 0x700 && (p->flags & AVRPART_HAS_PDI)) {
/*
* Work around for
* https://savannah.nongnu.org/bugs/index.php?37942
*
* Firmware version 7.24 (at least) on the Dragon behaves very
* strange when it gets a RESET request here. All subsequent
* responses are completely off, so the emulator becomes unusable.
* This appears to be a firmware bug (earlier versions, at least
* 7.14, didn't experience this), but by omitting the RESET for
* Xmega devices, we can work around it.
*/
} else {
if (jtagmkII_reset(pgm, 0x01) < 0)
return -1;
}
if ((pgm->flag & PGM_FL_IS_JTAG) && !(p->flags & AVRPART_HAS_PDI)) {
strcpy(hfuse.desc, "hfuse");