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Patch from David Gustafsson: break out SPI functions and fix bug in capacity

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calculation.

Removed expensive modulo operations from sd_read and sd_write because the block size is now a variable. (nvt)
This commit is contained in:
nvt-se 2009-11-03 15:21:43 +00:00
parent 9b801b59c7
commit 9b4cd05e1f
4 changed files with 89 additions and 64 deletions
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32
platform/msb430/dev/sd-arch.c
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@ -38,9 +38,10 @@
*/
#include "contiki.h"
#include "msb430-uart1.h"
#include "sd-arch.h"
#include <string.h>
#define SPI_IDLE 0xff
int
sd_arch_init(void)
@ -58,3 +59,32 @@ sd_arch_init(void)
return 0;
}
void
sd_arch_spi_write(int c)
{
UART_TX = c;
UART_WAIT_TXDONE();
}
void
sd_arch_spi_write_block(uint8_t *bytes, int amount)
{
int i;
for(i = 0; i < amount; i++) {
UART_TX = bytes[i];
UART_WAIT_TXDONE();
UART_RX;
}
}
unsigned
sd_arch_spi_read(void)
{
UART_TX = SPI_IDLE;
UART_WAIT_RX();
return UART_RX;
}