| 1 |
4 |
atypic |
/************************************************************************
|
| 2 |
|
|
**
|
| 3 |
|
|
** Copyright (C) 2006 Jesper Hansen <jesper@redegg.net>
|
| 4 |
|
|
** Modified for use with the IGOR Lisp machine
|
| 5 |
|
|
**
|
| 6 |
|
|
** Interface functions for MMC/SD cards
|
| 7 |
|
|
**
|
| 8 |
|
|
** File mmc_if.h
|
| 9 |
|
|
**
|
| 10 |
|
|
*************************************************************************
|
| 11 |
|
|
**
|
| 12 |
|
|
** This program is free software; you can redistribute it and/or
|
| 13 |
|
|
** modify it under the terms of the GNU General Public License
|
| 14 |
|
|
** as published by the Free Software Foundation; either version 2
|
| 15 |
|
|
** of the License, or (at your option) any later version.
|
| 16 |
|
|
**
|
| 17 |
|
|
** This program is distributed in the hope that it will be useful,
|
| 18 |
|
|
** but WITHOUT ANY WARRANTY; without even the implied warranty of
|
| 19 |
|
|
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
| 20 |
|
|
** GNU General Public License for more details.
|
| 21 |
|
|
**
|
| 22 |
|
|
** You should have received a copy of the GNU General Public License
|
| 23 |
|
|
** along with this program; if not, write to the Free Software Foundation,
|
| 24 |
|
|
** Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
| 25 |
|
|
**
|
| 26 |
|
|
*************************************************************************/
|
| 27 |
|
|
|
| 28 |
|
|
/** \file mmc_if.h
|
| 29 |
|
|
Simple MMC/SD-card functionality
|
| 30 |
|
|
*/
|
| 31 |
|
|
|
| 32 |
|
|
#ifndef __MMC_H__
|
| 33 |
|
|
#define __MMC_H__
|
| 34 |
|
|
#include "spi.h"
|
| 35 |
|
|
|
| 36 |
|
|
//The size of sectors read from SD/MMC
|
| 37 |
|
|
#define SECTOR_SIZE 512
|
| 38 |
|
|
|
| 39 |
|
|
/** @name MMC/SD Card I/O lines in SPI mode
|
| 40 |
|
|
*/
|
| 41 |
|
|
//@{
|
| 42 |
|
|
#define MMC_SCK SPI_SCK
|
| 43 |
|
|
#define MMC_MOSI SPI_MOSI
|
| 44 |
|
|
#define MMC_MISO SPI_MISO
|
| 45 |
|
|
#define MMC_CS SPI_SS_MMC
|
| 46 |
|
|
//@}
|
| 47 |
|
|
|
| 48 |
|
|
|
| 49 |
|
|
|
| 50 |
|
|
/** Helper structure.
|
| 51 |
|
|
This simplify conversion between bytes and words.
|
| 52 |
|
|
*/
|
| 53 |
|
|
struct u16bytes
|
| 54 |
|
|
{
|
| 55 |
|
|
uint8_t low; //!< byte member
|
| 56 |
|
|
uint8_t high; //!< byte member
|
| 57 |
|
|
};
|
| 58 |
|
|
|
| 59 |
|
|
/** Helper union.
|
| 60 |
|
|
This simplify conversion between bytes and words.
|
| 61 |
|
|
*/
|
| 62 |
|
|
union u16convert
|
| 63 |
|
|
{
|
| 64 |
|
|
uint16_t value; //!< for word access
|
| 65 |
|
|
struct u16bytes bytes; //!< for byte access
|
| 66 |
|
|
};
|
| 67 |
|
|
|
| 68 |
|
|
/** Helper structure.
|
| 69 |
|
|
This simplify conversion between bytes and longs.
|
| 70 |
|
|
*/
|
| 71 |
|
|
struct u32bytes
|
| 72 |
|
|
{
|
| 73 |
|
|
uint8_t byte1; //!< byte member
|
| 74 |
|
|
uint8_t byte2; //!< byte member
|
| 75 |
|
|
uint8_t byte3; //!< byte member
|
| 76 |
|
|
uint8_t byte4; //!< byte member
|
| 77 |
|
|
};
|
| 78 |
|
|
|
| 79 |
|
|
/** Helper structure.
|
| 80 |
|
|
This simplify conversion between words and longs.
|
| 81 |
|
|
*/
|
| 82 |
|
|
struct u32words
|
| 83 |
|
|
{
|
| 84 |
|
|
uint16_t low; //!< word member
|
| 85 |
|
|
uint16_t high; //!< word member
|
| 86 |
|
|
};
|
| 87 |
|
|
|
| 88 |
|
|
/** Helper union.
|
| 89 |
|
|
This simplify conversion between bytes, words and longs.
|
| 90 |
|
|
*/
|
| 91 |
|
|
union u32convert
|
| 92 |
|
|
{
|
| 93 |
|
|
uint32_t value; //!< for long access
|
| 94 |
|
|
struct u32words words; //!< for word access
|
| 95 |
|
|
struct u32bytes bytes; //!< for byte access
|
| 96 |
|
|
};
|
| 97 |
|
|
|
| 98 |
|
|
//Read a sector into the sector buffer
|
| 99 |
|
|
uint8_t read_sector_to_buffer(uint32_t lba);
|
| 100 |
|
|
|
| 101 |
|
|
//Write the sector buffer into a sector
|
| 102 |
|
|
uint8_t write_buffer_to_sector(uint32_t lba);
|
| 103 |
|
|
|
| 104 |
|
|
|
| 105 |
|
|
/** Read MMC/SD sector.
|
| 106 |
|
|
Read a single 512 byte sector from the MMC/SD card
|
| 107 |
|
|
\param lba Logical sectornumber to read
|
| 108 |
|
|
\param buffer Pointer to buffer for received data
|
| 109 |
|
|
\return 0 on success, -1 on error
|
| 110 |
|
|
*/
|
| 111 |
|
|
int mmc_readsector(uint32_t lba, uint8_t *buffer);
|
| 112 |
|
|
|
| 113 |
|
|
//Write MMC/SD sector
|
| 114 |
|
|
int mmc_writesector(uint32_t lba, uint8_t *buffer);
|
| 115 |
|
|
|
| 116 |
|
|
/** Init MMC/SD card.
|
| 117 |
|
|
Initialize I/O ports for the MMC/SD interface and
|
| 118 |
|
|
send init commands to the MMC/SD card
|
| 119 |
|
|
\return 0 on success, other values on error
|
| 120 |
|
|
*/
|
| 121 |
|
|
uint8_t mmc_init(void);
|
| 122 |
|
|
|
| 123 |
|
|
#endif
|
| 124 |
|
|
|
