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Writing to mmc does work now, but not always correct yet. It caused a corrupt file system once, so beware

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@5132 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Jens Arnold 2004-09-29 22:44:02 +00:00
parent 4e4231069a
commit 7d8598f30e
1 changed files with 11 additions and 5 deletions
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12
firmware/drivers/ata_mmc.c
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@ -242,17 +242,23 @@ static unsigned char poll_byte(int timeout)
static unsigned char poll_busy(int timeout) static unsigned char poll_busy(int timeout)
{ {
int i; int i;
unsigned char data; unsigned char data, dummy;
while (!(SSR1 &SCI_TEND)); /* wait for end of transfer */ while (!(SSR1 &SCI_TEND)); /* wait for end of transfer */
TDR1 = 0xFF; /* send do-nothing data in parallel */ TDR1 = 0xFF; /* send do-nothing data in parallel */
/* get data response */
SSR1 = 0; /* start receiving */
while (!(SSR1 & SCI_RDRF)); /* wait for data */
data = RDR1; /* read byte */
/* wait until the card is ready again */
i = 0; i = 0;
do { do {
SSR1 = 0; /* start receiving */ SSR1 = 0; /* start receiving */
while (!(SSR1 & SCI_RDRF)); /* wait for data */ while (!(SSR1 & SCI_RDRF)); /* wait for data */
data = RDR1; /* read byte */ dummy = RDR1; /* read byte */
} while ((data == 0x00) && (++i < timeout)); } while ((dummy != 0xFF) && (++i < timeout));
return fliptable[(signed char)data]; return fliptable[(signed char)data];
} }