contiki/platform/msb430/dev/sd-arch.h
nvt-se 9b4cd05e1f Patch from David Gustafsson: break out SPI functions and fix bug in capacity
calculation.

Removed expensive modulo operations from sd_read and sd_write because the block size is now a variable. (nvt)
2009-11-03 15:21:43 +00:00

81 lines
2.6 KiB
C
Executable File

/*
* Copyright (c) 2009, Swedish Institute of Computer Science
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the Contiki operating system.
*
*/
/**
* \file
* SD driver implementation using SPI.
* \author
* Nicolas Tsiftes <nvt@sics.se>
*/
#ifndef SD_ARCH_H
#define SD_ARCH_H
#include "msb430-uart1.h"
#ifndef U1IFG
#define U1IFG IFG2
#endif /* U1IFG */
#define MS_DELAY(x) clock_delay(354 * (x))
/* Machine-dependent macros. */
#define LOCK_SPI() do { \
if(!uart_lock(UART_MODE_SPI)) {\
return 0; \
} \
} while(0)
#define UNLOCK_SPI() do { \
uart_unlock(UART_MODE_SPI); \
} while(0)
#define SD_CONNECTED() !(P2IN & 0x40)
#define LOWER_CS() (P5OUT &= ~0x01)
#define RAISE_CS() do { \
UART_WAIT_TXDONE(); \
P5OUT |= 0x01; \
UART_TX = SPI_IDLE; \
UART_WAIT_TXDONE(); \
} while(0)
/* Configuration parameters. */
#define SD_TRANSACTION_ATTEMPTS 512
#define SD_READ_RESPONSE_ATTEMPTS 8
#define SD_READ_BLOCK_ATTEMPTS 2
int sd_arch_init(void);
void sd_arch_spi_write(int c);
void sd_arch_spi_write_block(uint8_t *bytes, int amount);
unsigned sd_arch_spi_read(void);
#endif /* !SD_ARCH_H */