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Sansa Connect: Use sleep() instead udelay() in AVR spi_txrx.

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This should prevent buffer underruns that can occur during heavy use of buttons or scrollwheel.



git-svn-id: svn://svn.rockbox.org/rockbox/trunk@31267 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Tomasz Moń 2011-12-15 15:33:53 +00:00
parent 89aec97f3d
commit ddd594b03e
6 changed files with 18 additions and 8 deletions
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8
firmware/target/arm/tms320dm320/sansa-connect/avr-sansaconnect.c
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@ -228,7 +228,9 @@ static void spi_txrx(unsigned char *buf_tx, unsigned char *buf_rx, int n)
for (i = 0; i<n; i++)
{
IO_SERIAL1_TX_DATA = buf_tx[i];
udelay(100);
/* a short wait for AVR to process data */
sleep(HZ/1000);
do
{
@ -248,7 +250,7 @@ static void spi_txrx(unsigned char *buf_tx, unsigned char *buf_rx, int n)
mutex_unlock(&avr_mtx);
}
static void avr_hid_sync(void)
void avr_hid_sync(void)
{
int i;
unsigned char prg[4] = {CMD_SYNC, CMD_VER, CMD_FILL, CMD_CLOSE};
@ -279,8 +281,6 @@ void avr_hid_init(void)
IO_SERIAL1_MODE = 0x6DB;
mutex_init(&avr_mtx);
avr_hid_sync();
}
/* defined in powermgmt-sansaconnect.c */