mirror of
https://github.com/oliverschmidt/contiki.git
synced 2024-12-23 01:29:33 +00:00
9b4cd05e1f
calculation. Removed expensive modulo operations from sd_read and sd_write because the block size is now a variable. (nvt)
81 lines
2.6 KiB
C
Executable File
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 */
|