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Player: Slightly shorter MAS poll interval fixes playback of 384 kbps 48 kHz layer 2 files. Others: Correct serial bitrate allows increasing the postpone_dma_tick delay a bit without disturbing playback of same files.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@5387 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Jens Arnold 2004-11-07 08:09:08 +00:00
parent 1c9ab1ba69
commit 6fde243d52
1 changed files with 4 additions and 11 deletions
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15
firmware/mp3_playback.c
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@ -335,19 +335,12 @@ static const unsigned int prescale_table[] =
bool dma_on; /* The DMA is active */
#if CONFIG_HWCODEC == MAS3507D
static void mas_poll_start(int interval_in_ms)
static void mas_poll_start(void)
{
unsigned int count;
count = (FREQ * interval_in_ms) / 1000 / 8;
count = 9 * FREQ / 10000 / 8; /* 0.9 ms */
if(count > 0xffff)
{
panicf("Error! The MAS poll interval is too long (%d ms)\n",
interval_in_ms);
return;
}
/* We are using timer 1 */
TSTR &= ~0x02; /* Stop the timer */
@ -371,7 +364,7 @@ static void postpone_dma_tick(void)
{
unsigned int count;
count = FREQ / 2000 / 8;
count = 8 * FREQ / 10000 / 8; /* 0.8 ms */
/* We are using timer 1 */
@ -1014,7 +1007,7 @@ void mp3_init(int volume, int bass, int treble, int balance, int loudness,
#endif
#if CONFIG_HWCODEC == MAS3507D
mas_poll_start(1);
mas_poll_start();
mas_writereg(MAS_REG_KPRESCALE, 0xe9400);
dac_enable(true);