diff options
Diffstat (limited to 'src/ao_audio.c')
| -rw-r--r-- | src/ao_audio.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/src/ao_audio.c b/src/ao_audio.c index 0d521973..5d8fdfb5 100644 --- a/src/ao_audio.c +++ b/src/ao_audio.c @@ -584,6 +584,12 @@ ao_audio_send(__xdata uint8_t *samples, uint16_t nsamples) __reentrant { ao_mutex_get(&ao_audio_mutex); +#if AUDIO_STANDBY_ON_P2_4 + /* + * Turn on the audio amp + */ + P2_4 = 1; +#endif /* * Turn on timer 4. Free running from 0 to 0xff, with P2_0 * 'on' interval controlled by the value in T4CC0. Run this @@ -641,6 +647,12 @@ ao_audio_send(__xdata uint8_t *samples, uint16_t nsamples) __reentrant P2_0 = 0; P2SEL = (P2SEL & ~P2SEL_SELP2_0_MASK) | P2SEL_SELP2_0_GPIO; +#if AUDIO_STANDBY_ON_P2_4 + /* + * Turn off the audio amp + */ + P2_4 = 0; +#endif ao_mutex_put(&ao_audio_mutex); } @@ -665,6 +677,12 @@ ao_audio_init(void) P2SEL = (P2SEL & ~P2SEL_SELP2_0_MASK) | P2SEL_SELP2_0_GPIO; PERCFG = (PERCFG & ~PERCFG_T4CFG_ALT_MASK) | PERCFG_T4CFG_ALT_2; +#if AUDIO_STANDBY_ON_P2_4 + P2_4 = 0; + P2SEL &= ~P2SEL_SELP2_4_PERIPHERAL; + P2DIR |= (1 << 4); +#endif + /* Timer 3 is used to clock the DMA transfers from the audio data buffer * to the timer 4 */ |