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SD-Driver works again (with the same problems than before)

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This commit is contained in:
Markus Fröschle
2013-08-08 19:46:02 +00:00
parent 7adab9f89b
commit eec7a8fe43
2 changed files with 6 additions and 7 deletions
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11
BaS_gcc/sources/mmc.c
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@@ -22,8 +22,8 @@
/* Copyright (C) 2012, mfro, all rights reserved. */
#define CS_LOW() { dspi_fifo_val &= ~MCF_DSPI_DTFR_CS5; }
#define CS_HIGH() { dspi_fifo_val |= MCF_DSPI_DTFR_CS5; }
#define CS_LOW() { dspi_fifo_val |= MCF_DSPI_DTFR_CS5; }
#define CS_HIGH() { dspi_fifo_val &= ~MCF_DSPI_DTFR_CS5; }
/*
* DCTAR_PBR (baud rate prescaler) and DCTAR_BR (baud rate scaler) together determine the SPI baud rate. The forumula is
@@ -93,7 +93,7 @@ static volatile DSTATUS Stat = 0 /* STA_NOINIT */; /* Physical drive status */
static uint8_t CardType; /* Card type flags */
static uint32_t dspi_fifo_val = MCF_DSPI_DTFR_CONT | /* enable continous chip select */
static uint32_t dspi_fifo_val = // MCF_DSPI_DTFR_CONT | /* enable continous chip select */
/* CTAS use DCTAR0 for clock and attributes */
MCF_DSPI_DTFR_CTCNT;
@@ -110,9 +110,8 @@ static uint8_t xchg_spi(uint8_t byte, int last)
uint32_t fifo;
uint8_t res;
fifo = byte & 0xff; /* transfer bytes only */
fifo |= (last ? 0 : MCF_DSPI_DTFR_CONT); /* leave chip selects asserted during multiple transfers */
fifo |= (last ? MCF_DSPI_DTFR_EOQ : 0); /* mark last transfer */
fifo = dspi_fifo_val | (byte & 0xff); /* transfer bytes only */
//fifo |= (last ? MCF_DSPI_DTFR_EOQ : 0); /* mark last transfer */
MCF_DSPI_DTFR = fifo;
while (! (MCF_DSPI_DSR & MCF_DSPI_DSR_TCF)); /* wait until DSPI transfer complete */
fifo = MCF_DSPI_DRFR; /* read transferred word */