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Don't enable the pullup on the target /RESET line in the AVRISP project for PDI mode - clearing the XMEGA's reset control register twice is enough to release it from reset. Possible silicon bug, since the official Atmel programmers have the same issue.

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Dean Camera
2010-03-16 12:09:22 +00:00
parent 39d56aeffe
commit 2b74b517ea
2 changed files with 4 additions and 5 deletions
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7
Projects/AVRISP-MKII/Lib/XPROG/XPROGTarget.c
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@@ -237,19 +237,18 @@ void XPROGTarget_DisableTargetPDI(void)
UCSR1B = 0;
UCSR1C = 0;
/* Make Reset input with pullup to take target out of /RESET, tristate all other pins */
/* Tristate all pins */
DDRD &= ~((1 << 5) | (1 << 3));
PORTD &= ~((1 << 3) | (1 << 2));
PORTD |= (1 << 5);
#else
/* Turn off software USART management timer */
TCCR1B = 0;
/* Make Reset input with pullup to take target out of /RESET, tristate all other pins */
/* Tristate all pins */
BITBANG_PDIDATA_DDR &= ~BITBANG_PDIDATA_MASK;
BITBANG_PDICLOCK_DDR &= ~BITBANG_PDICLOCK_MASK;
BITBANG_PDICLOCK_PORT &= ~BITBANG_PDICLOCK_MASK;
BITBANG_PDIDATA_PORT |= BITBANG_PDIDATA_MASK;
BITBANG_PDIDATA_PORT &= ~BITBANG_PDIDATA_MASK;
#endif
}