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| author | Keith Packard <keithp@keithp.com> | 2011-06-04 17:58:51 -0700 |
|---|---|---|
| committer | Keith Packard <keithp@keithp.com> | 2011-06-04 17:58:51 -0700 |
| commit | e0ebdb4468db84a8e7f83043103e4b3bac928b74 (patch) | |
| tree | 2d354ae1797caa7fa00c4cafc2866529a8da8511 | |
| parent | 219c43463f67a942a3c842216a1f13cd3df78145 (diff) | |
src-avr: Run CPU at 8MHz, even with a 16MHz xtal
This allows the Teensy to run at 3.3V.
Signed-off-by: Keith Packard <keithp@keithp.com>
| -rw-r--r-- | src-avr/ao_timer.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src-avr/ao_timer.c b/src-avr/ao_timer.c index f0918a7d..aec40475 100644 --- a/src-avr/ao_timer.c +++ b/src-avr/ao_timer.c @@ -140,7 +140,13 @@ ao_clock_init(void) /* Disable the clock prescaler */ cli(); CLKPR = (1 << CLKPCE); + + /* Always run the system clock at 8MHz */ +#if AVR_CLOCK > 12000000UL + CLKPR = 1; +#else CLKPR = 0; +#endif sei(); /* Set up the PLL to use the crystal */ |