diff options
Diffstat (limited to 'platforms/avr/platform.c')
| -rw-r--r-- | platforms/avr/platform.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/platforms/avr/platform.c b/platforms/avr/platform.c index 3e35b4fe4c..37decb6ec8 100644 --- a/platforms/avr/platform.c +++ b/platforms/avr/platform.c @@ -16,6 +16,17 @@ #include "platform_deps.h" +static void disable_jtag(void) { +// To use PF4-7 (PC2-5 on ATmega32A), disable JTAG by writing JTD bit twice within four cycles. +#if (defined(__AVR_AT90USB646__) || defined(__AVR_AT90USB647__) || defined(__AVR_AT90USB1286__) || defined(__AVR_AT90USB1287__) || defined(__AVR_ATmega16U4__) || defined(__AVR_ATmega32U4__)) + MCUCR |= _BV(JTD); + MCUCR |= _BV(JTD); +#elif defined(__AVR_ATmega32A__) + MCUCSR |= _BV(JTD); + MCUCSR |= _BV(JTD); +#endif +} + void platform_setup(void) { - // do nothing + disable_jtag(); } |