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annotate sd_raw_config.h @ 37:858d5959929f

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add diagram
author Matt Johnston <matt@ucc.asn.au>
date Thu, 27 Jun 2013 18:24:24 +0800
parents 5f9a40d6991b
children 9e888708f33d
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1
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2 /*
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3 * Copyright (c) 2006-2012 by Roland Riegel <[email protected]>
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4 *
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5 * This file is free software; you can redistribute it and/or modify
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6 * it under the terms of either the GNU General Public License version 2
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7 * or the GNU Lesser General Public License version 2.1, both as
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8 * published by the Free Software Foundation.
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9 */
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10
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11 #ifndef SD_RAW_CONFIG_H
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12 #define SD_RAW_CONFIG_H
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13
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14 #include <stdint.h>
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15
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16 #ifdef __cplusplus
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17 extern "C"
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18 {
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19 #endif
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20
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21 /**
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22 * \addtogroup sd_raw
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23 *
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24 * @{
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25 */
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26 /**
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27 * \file
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28 * MMC/SD support configuration (license: GPLv2 or LGPLv2.1)
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29 */
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30
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31 /**
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32 * \ingroup sd_raw_config
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33 * Controls MMC/SD write support.
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34 *
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35 * Set to 1 to enable MMC/SD write support, set to 0 to disable it.
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36 */
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37 #define SD_RAW_WRITE_SUPPORT 1
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38
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39 /**
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40 * \ingroup sd_raw_config
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41 * Controls MMC/SD write buffering.
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42 *
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43 * Set to 1 to buffer write accesses, set to 0 to disable it.
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44 *
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45 * \note This option has no effect when SD_RAW_WRITE_SUPPORT is 0.
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46 */
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47 #define SD_RAW_WRITE_BUFFERING 1
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48
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49 /**
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50 * \ingroup sd_raw_config
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51 * Controls MMC/SD access buffering.
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52 *
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53 * Set to 1 to save static RAM, but be aware that you will
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54 * lose performance.
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55 *
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56 * \note When SD_RAW_WRITE_SUPPORT is 1, SD_RAW_SAVE_RAM will
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57 * be reset to 0.
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58 */
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59 #define SD_RAW_SAVE_RAM 0
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60
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61 /**
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62 * \ingroup sd_raw_config
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63 * Controls support for SDHC cards.
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64 *
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65 * Set to 1 to support so-called SDHC memory cards, i.e. SD
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66 * cards with more than 2 gigabytes of memory.
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67 */
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68 #define SD_RAW_SDHC 1
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69
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70 /**
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71 * @}
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72 */
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73
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74 /* defines for customisation of sd/mmc port access */
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75 #if defined(__AVR_ATmega8__) || \
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76 defined(__AVR_ATmega48__) || \
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77 defined(__AVR_ATmega48P__) || \
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78 defined(__AVR_ATmega88__) || \
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79 defined(__AVR_ATmega88P__) || \
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80 defined(__AVR_ATmega168__) || \
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81 defined(__AVR_ATmega168P__) || \
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82 defined(__AVR_ATmega328P__)
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83 #define configure_pin_mosi() DDRB |= (1 << DDB3)
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84 #define configure_pin_sck() DDRB |= (1 << DDB5)
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85 #define configure_pin_ss() DDRB |= (1 << DDB2)
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86 #define configure_pin_miso() DDRB &= ~(1 << DDB4)
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87
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88 #define select_card() PORTB &= ~(1 << PORTB2)
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89 #define unselect_card() PORTB |= (1 << PORTB2)
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90 #elif defined(__AVR_ATmega16__) || \
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91 defined(__AVR_ATmega32__)
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92 #define configure_pin_mosi() DDRB |= (1 << DDB5)
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93 #define configure_pin_sck() DDRB |= (1 << DDB7)
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94 #define configure_pin_ss() DDRB |= (1 << DDB4)
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95 #define configure_pin_miso() DDRB &= ~(1 << DDB6)
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96
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97 #define select_card() PORTB &= ~(1 << PORTB4)
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98 #define unselect_card() PORTB |= (1 << PORTB4)
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99 #elif defined(__AVR_ATmega64__) || \
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100 defined(__AVR_ATmega128__) || \
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101 defined(__AVR_ATmega169__)
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102 #define configure_pin_mosi() DDRB |= (1 << DDB2)
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103 #define configure_pin_sck() DDRB |= (1 << DDB1)
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104 #define configure_pin_ss() DDRB |= (1 << DDB0)
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105 #define configure_pin_miso() DDRB &= ~(1 << DDB3)
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106
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107 #define select_card() PORTB &= ~(1 << PORTB0)
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108 #define unselect_card() PORTB |= (1 << PORTB0)
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109 #else
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110 #error "no sd/mmc pin mapping available!"
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111 #endif
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112
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113 #define configure_pin_available() DDRC &= ~(1 << DDC4)
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114 #define configure_pin_locked() DDRC &= ~(1 << DDC5)
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115
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116 #define get_pin_available() (PINC & (1 << PINC4))
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117 #define get_pin_locked() (PINC & (1 << PINC5))
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118
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119 #if SD_RAW_SDHC
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120 typedef uint64_t offset_t;
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121 #else
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122 typedef uint32_t offset_t;
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123 #endif
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124
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125 /* configuration checks */
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126 #if SD_RAW_WRITE_SUPPORT
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127 #undef SD_RAW_SAVE_RAM
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128 #define SD_RAW_SAVE_RAM 0
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129 #else
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130 #undef SD_RAW_WRITE_BUFFERING
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131 #define SD_RAW_WRITE_BUFFERING 0
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132 #endif
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133
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134 #ifdef __cplusplus
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135 }
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136 #endif
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137
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138 #endif
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139