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replaced timer interrupt by SLT

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This commit is contained in:
Markus Fröschle
2012-12-10 14:31:30 +00:00
parent f3e23f4923
commit a17ac948f4
1 changed files with 9 additions and 23 deletions
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32
SD_CARD/BaS_gcc/sources/mmcbb.c
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@@ -102,12 +102,7 @@
static volatile DSTATUS Stat = STA_NOINIT; /* Physical drive status */
static volatile
uint32_t Timer1, Timer2; /* 1kHz decrement timer stopped at zero (disk_timerproc()) */
static
uint8_t CardType; /* Card type flags */
static uint8_t CardType; /* Card type flags */
@@ -243,11 +238,9 @@ void power_off (void) /* Disable SPI function */
}
/*-----------------------------------------------------------------------*/
/* Receive a data packet from the MMC */
/*-----------------------------------------------------------------------*/
static
int rcvr_datablock ( /* 1:OK, 0:Error */
uint8_t *buff, /* Data buffer */
@@ -255,13 +248,12 @@ int rcvr_datablock ( /* 1:OK, 0:Error */
)
{
uint8_t token;
uint32_t target = MCF_SLT_SCNT(0) - (200 * 1000L * 132);
Timer1 = 200;
do { /* Wait for DataStart token in timeout of 200ms */
token = xchg_spi(0xFF);
/* This loop will take a time. Insert rot_rdq() here for multitask envilonment. */
} while ((token == 0xFF) && Timer1);
} while ((token == 0xFF) && MCF_SLT_SCNT(0) > target);
if(token != 0xFE) return 0; /* Function fails if invalid DataStart token or timeout */
rcvr_spi_multi(buff, btr); /* Store trailing data to the buffer */
@@ -374,12 +366,13 @@ DSTATUS disk_initialize(uint8_t drv)
ty = 0;
if (send_cmd(CMD0, 0) == 1) { /* Put the card SPI/Idle state */
Timer1 = 1000; /* Initialization timeout = 1 sec */
uint32_t target = MCF_SLT_SCNT(0) - (1000L * 1000L * 132); /* 1 sec */
if (send_cmd(CMD8, 0x1AA) == 1) { /* SDv2? */
for (n = 0; n < 4; n++) ocr[n] = xchg_spi(0xFF); /* Get 32 bit return value of R7 resp */
if (ocr[2] == 0x01 && ocr[3] == 0xAA) { /* Is the card supports vcc of 2.7-3.6V? */
while (Timer1 && send_cmd(ACMD41, 1UL << 30)) ; /* Wait for end of initialization with ACMD41(HCS) */
if (Timer1 && send_cmd(CMD58, 0) == 0) { /* Check CCS bit in the OCR */
while (MCF_SLT_SCNT(0) > target && send_cmd(ACMD41, 1UL << 30)) ; /* Wait for end of initialization with ACMD41(HCS) */
if (MCF_SLT_SCNT(0) > target && send_cmd(CMD58, 0) == 0) { /* Check CCS bit in the OCR */
for (n = 0; n < 4; n++) ocr[n] = xchg_spi(0xFF);
ty = (ocr[0] & 0x40) ? CT_SD2 | CT_BLOCK : CT_SD2; /* Card id SDv2 */
}
@@ -390,8 +383,8 @@ DSTATUS disk_initialize(uint8_t drv)
} else {
ty = CT_MMC; cmd = CMD1; /* MMCv3 (CMD1(0)) */
}
while (Timer1 && send_cmd(cmd, 0)) ; /* Wait for end of initialization */
if (!Timer1 || send_cmd(CMD16, 512) != 0) /* Set block length: 512 */
while (MCF_SLT_SCNT(0) > target && send_cmd(cmd, 0)) ; /* Wait for end of initialization */
if (!MCF_SLT_SCNT(0) > target || send_cmd(CMD16, 512) != 0) /* Set block length: 512 */
ty = 0;
}
}
@@ -641,15 +634,8 @@ DRESULT disk_ioctl (
void disk_timerproc (void)
{
uint16_t n;
uint8_t s;
n = Timer1; /* 1kHz decrement timer stopped at 0 */
if (n) Timer1 = --n;
n = Timer2;
if (n) Timer2 = --n;
s = Stat;
if (WP) /* Write protected */
s |= STA_PROTECT;