root / arduino-1.0 / libraries / SD / utility / Sd2Card.cpp @ 58d82c77
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1 | 58d82c77 | Tom Mullins | /* Arduino Sd2Card Library
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2 | * Copyright (C) 2009 by William Greiman
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3 | *
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4 | * This file is part of the Arduino Sd2Card Library
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5 | *
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6 | * This Library is free software: you can redistribute it and/or modify
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7 | * it under the terms of the GNU General Public License as published by
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8 | * the Free Software Foundation, either version 3 of the License, or
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9 | * (at your option) any later version.
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10 | *
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11 | * This Library is distributed in the hope that it will be useful,
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12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 | * GNU General Public License for more details.
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15 | *
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16 | * You should have received a copy of the GNU General Public License
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17 | * along with the Arduino Sd2Card Library. If not, see
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18 | * <http://www.gnu.org/licenses/>.
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19 | */
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20 | #include <Arduino.h> |
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21 | #include "Sd2Card.h" |
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22 | //------------------------------------------------------------------------------
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23 | #ifndef SOFTWARE_SPI
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24 | // functions for hardware SPI
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25 | /** Send a byte to the card */
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26 | static void spiSend(uint8_t b) { |
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27 | SPDR = b; |
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28 | while (!(SPSR & (1 << SPIF))); |
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29 | } |
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30 | /** Receive a byte from the card */
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31 | static uint8_t spiRec(void) { |
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32 | spiSend(0XFF);
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33 | return SPDR;
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34 | } |
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35 | #else // SOFTWARE_SPI |
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36 | //------------------------------------------------------------------------------
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37 | /** nop to tune soft SPI timing */
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38 | #define nop asm volatile ("nop\n\t") |
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39 | //------------------------------------------------------------------------------
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40 | /** Soft SPI receive */
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41 | uint8_t spiRec(void) {
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42 | uint8_t data = 0;
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43 | // no interrupts during byte receive - about 8 us
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44 | cli(); |
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45 | // output pin high - like sending 0XFF
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46 | fastDigitalWrite(SPI_MOSI_PIN, HIGH); |
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47 | |||
48 | for (uint8_t i = 0; i < 8; i++) { |
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49 | fastDigitalWrite(SPI_SCK_PIN, HIGH); |
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50 | |||
51 | // adjust so SCK is nice
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52 | nop; |
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53 | nop; |
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54 | |||
55 | data <<= 1;
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56 | |||
57 | if (fastDigitalRead(SPI_MISO_PIN)) data |= 1; |
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58 | |||
59 | fastDigitalWrite(SPI_SCK_PIN, LOW); |
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60 | } |
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61 | // enable interrupts
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62 | sei(); |
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63 | return data;
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64 | } |
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65 | //------------------------------------------------------------------------------
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66 | /** Soft SPI send */
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67 | void spiSend(uint8_t data) {
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68 | // no interrupts during byte send - about 8 us
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69 | cli(); |
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70 | for (uint8_t i = 0; i < 8; i++) { |
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71 | fastDigitalWrite(SPI_SCK_PIN, LOW); |
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72 | |||
73 | fastDigitalWrite(SPI_MOSI_PIN, data & 0X80);
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74 | |||
75 | data <<= 1;
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76 | |||
77 | fastDigitalWrite(SPI_SCK_PIN, HIGH); |
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78 | } |
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79 | // hold SCK high for a few ns
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80 | nop; |
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81 | nop; |
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82 | nop; |
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83 | nop; |
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84 | |||
85 | fastDigitalWrite(SPI_SCK_PIN, LOW); |
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86 | // enable interrupts
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87 | sei(); |
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88 | } |
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89 | #endif // SOFTWARE_SPI |
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90 | //------------------------------------------------------------------------------
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91 | // send command and return error code. Return zero for OK
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92 | uint8_t Sd2Card::cardCommand(uint8_t cmd, uint32_t arg) { |
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93 | // end read if in partialBlockRead mode
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94 | readEnd(); |
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95 | |||
96 | // select card
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97 | chipSelectLow(); |
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98 | |||
99 | // wait up to 300 ms if busy
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100 | waitNotBusy(300);
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101 | |||
102 | // send command
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103 | spiSend(cmd | 0x40);
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104 | |||
105 | // send argument
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106 | for (int8_t s = 24; s >= 0; s -= 8) spiSend(arg >> s); |
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107 | |||
108 | // send CRC
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109 | uint8_t crc = 0XFF;
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110 | if (cmd == CMD0) crc = 0X95; // correct crc for CMD0 with arg 0 |
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111 | if (cmd == CMD8) crc = 0X87; // correct crc for CMD8 with arg 0X1AA |
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112 | spiSend(crc); |
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113 | |||
114 | // wait for response
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115 | for (uint8_t i = 0; ((status_ = spiRec()) & 0X80) && i != 0XFF; i++); |
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116 | return status_;
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117 | } |
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118 | //------------------------------------------------------------------------------
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119 | /**
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120 | * Determine the size of an SD flash memory card.
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121 | *
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122 | * \return The number of 512 byte data blocks in the card
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123 | * or zero if an error occurs.
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124 | */
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125 | uint32_t Sd2Card::cardSize(void) {
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126 | csd_t csd; |
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127 | if (!readCSD(&csd)) return 0; |
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128 | if (csd.v1.csd_ver == 0) { |
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129 | uint8_t read_bl_len = csd.v1.read_bl_len; |
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130 | uint16_t c_size = (csd.v1.c_size_high << 10)
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131 | | (csd.v1.c_size_mid << 2) | csd.v1.c_size_low;
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132 | uint8_t c_size_mult = (csd.v1.c_size_mult_high << 1)
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133 | | csd.v1.c_size_mult_low; |
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134 | return (uint32_t)(c_size + 1) << (c_size_mult + read_bl_len - 7); |
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135 | } else if (csd.v2.csd_ver == 1) { |
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136 | uint32_t c_size = ((uint32_t)csd.v2.c_size_high << 16)
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137 | | (csd.v2.c_size_mid << 8) | csd.v2.c_size_low;
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138 | return (c_size + 1) << 10; |
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139 | } else {
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140 | error(SD_CARD_ERROR_BAD_CSD); |
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141 | return 0; |
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142 | } |
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143 | } |
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144 | //------------------------------------------------------------------------------
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145 | void Sd2Card::chipSelectHigh(void) { |
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146 | digitalWrite(chipSelectPin_, HIGH); |
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147 | } |
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148 | //------------------------------------------------------------------------------
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149 | void Sd2Card::chipSelectLow(void) { |
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150 | digitalWrite(chipSelectPin_, LOW); |
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151 | } |
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152 | //------------------------------------------------------------------------------
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153 | /** Erase a range of blocks.
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154 | *
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155 | * \param[in] firstBlock The address of the first block in the range.
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156 | * \param[in] lastBlock The address of the last block in the range.
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157 | *
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158 | * \note This function requests the SD card to do a flash erase for a
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159 | * range of blocks. The data on the card after an erase operation is
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160 | * either 0 or 1, depends on the card vendor. The card must support
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161 | * single block erase.
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162 | *
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163 | * \return The value one, true, is returned for success and
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164 | * the value zero, false, is returned for failure.
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165 | */
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166 | uint8_t Sd2Card::erase(uint32_t firstBlock, uint32_t lastBlock) { |
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167 | if (!eraseSingleBlockEnable()) {
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168 | error(SD_CARD_ERROR_ERASE_SINGLE_BLOCK); |
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169 | goto fail;
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170 | } |
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171 | if (type_ != SD_CARD_TYPE_SDHC) {
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172 | firstBlock <<= 9;
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173 | lastBlock <<= 9;
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174 | } |
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175 | if (cardCommand(CMD32, firstBlock)
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176 | || cardCommand(CMD33, lastBlock) |
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177 | || cardCommand(CMD38, 0)) {
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178 | error(SD_CARD_ERROR_ERASE); |
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179 | goto fail;
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180 | } |
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181 | if (!waitNotBusy(SD_ERASE_TIMEOUT)) {
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182 | error(SD_CARD_ERROR_ERASE_TIMEOUT); |
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183 | goto fail;
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184 | } |
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185 | chipSelectHigh(); |
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186 | return true; |
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187 | |||
188 | fail:
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189 | chipSelectHigh(); |
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190 | return false; |
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191 | } |
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192 | //------------------------------------------------------------------------------
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193 | /** Determine if card supports single block erase.
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194 | *
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195 | * \return The value one, true, is returned if single block erase is supported.
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196 | * The value zero, false, is returned if single block erase is not supported.
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197 | */
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198 | uint8_t Sd2Card::eraseSingleBlockEnable(void) {
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199 | csd_t csd; |
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200 | return readCSD(&csd) ? csd.v1.erase_blk_en : 0; |
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201 | } |
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202 | //------------------------------------------------------------------------------
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203 | /**
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204 | * Initialize an SD flash memory card.
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205 | *
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206 | * \param[in] sckRateID SPI clock rate selector. See setSckRate().
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207 | * \param[in] chipSelectPin SD chip select pin number.
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208 | *
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209 | * \return The value one, true, is returned for success and
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210 | * the value zero, false, is returned for failure. The reason for failure
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211 | * can be determined by calling errorCode() and errorData().
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212 | */
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213 | uint8_t Sd2Card::init(uint8_t sckRateID, uint8_t chipSelectPin) { |
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214 | errorCode_ = inBlock_ = partialBlockRead_ = type_ = 0;
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215 | chipSelectPin_ = chipSelectPin; |
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216 | // 16-bit init start time allows over a minute
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217 | uint16_t t0 = (uint16_t)millis(); |
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218 | uint32_t arg; |
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219 | |||
220 | // set pin modes
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221 | pinMode(chipSelectPin_, OUTPUT); |
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222 | chipSelectHigh(); |
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223 | pinMode(SPI_MISO_PIN, INPUT); |
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224 | pinMode(SPI_MOSI_PIN, OUTPUT); |
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225 | pinMode(SPI_SCK_PIN, OUTPUT); |
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226 | |||
227 | #ifndef SOFTWARE_SPI
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228 | // SS must be in output mode even it is not chip select
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229 | pinMode(SS_PIN, OUTPUT); |
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230 | digitalWrite(SS_PIN, HIGH); // disable any SPI device using hardware SS pin
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231 | // Enable SPI, Master, clock rate f_osc/128
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232 | SPCR = (1 << SPE) | (1 << MSTR) | (1 << SPR1) | (1 << SPR0); |
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233 | // clear double speed
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234 | SPSR &= ~(1 << SPI2X);
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235 | #endif // SOFTWARE_SPI |
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236 | |||
237 | // must supply min of 74 clock cycles with CS high.
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238 | for (uint8_t i = 0; i < 10; i++) spiSend(0XFF); |
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239 | |||
240 | chipSelectLow(); |
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241 | |||
242 | // command to go idle in SPI mode
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243 | while ((status_ = cardCommand(CMD0, 0)) != R1_IDLE_STATE) { |
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244 | if (((uint16_t)millis() - t0) > SD_INIT_TIMEOUT) {
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245 | error(SD_CARD_ERROR_CMD0); |
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246 | goto fail;
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247 | } |
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248 | } |
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249 | // check SD version
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250 | if ((cardCommand(CMD8, 0x1AA) & R1_ILLEGAL_COMMAND)) { |
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251 | type(SD_CARD_TYPE_SD1); |
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252 | } else {
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253 | // only need last byte of r7 response
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254 | for (uint8_t i = 0; i < 4; i++) status_ = spiRec(); |
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255 | if (status_ != 0XAA) { |
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256 | error(SD_CARD_ERROR_CMD8); |
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257 | goto fail;
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258 | } |
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259 | type(SD_CARD_TYPE_SD2); |
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260 | } |
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261 | // initialize card and send host supports SDHC if SD2
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262 | arg = type() == SD_CARD_TYPE_SD2 ? 0X40000000 : 0; |
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263 | |||
264 | while ((status_ = cardAcmd(ACMD41, arg)) != R1_READY_STATE) {
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265 | // check for timeout
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266 | if (((uint16_t)millis() - t0) > SD_INIT_TIMEOUT) {
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267 | error(SD_CARD_ERROR_ACMD41); |
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268 | goto fail;
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269 | } |
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270 | } |
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271 | // if SD2 read OCR register to check for SDHC card
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272 | if (type() == SD_CARD_TYPE_SD2) {
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273 | if (cardCommand(CMD58, 0)) { |
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274 | error(SD_CARD_ERROR_CMD58); |
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275 | goto fail;
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276 | } |
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277 | if ((spiRec() & 0XC0) == 0XC0) type(SD_CARD_TYPE_SDHC); |
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278 | // discard rest of ocr - contains allowed voltage range
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279 | for (uint8_t i = 0; i < 3; i++) spiRec(); |
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280 | } |
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281 | chipSelectHigh(); |
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282 | |||
283 | #ifndef SOFTWARE_SPI
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284 | return setSckRate(sckRateID);
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285 | #else // SOFTWARE_SPI |
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286 | return true; |
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287 | #endif // SOFTWARE_SPI |
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288 | |||
289 | fail:
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290 | chipSelectHigh(); |
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291 | return false; |
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292 | } |
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293 | //------------------------------------------------------------------------------
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294 | /**
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295 | * Enable or disable partial block reads.
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296 | *
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297 | * Enabling partial block reads improves performance by allowing a block
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298 | * to be read over the SPI bus as several sub-blocks. Errors may occur
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299 | * if the time between reads is too long since the SD card may timeout.
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300 | * The SPI SS line will be held low until the entire block is read or
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301 | * readEnd() is called.
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302 | *
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303 | * Use this for applications like the Adafruit Wave Shield.
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304 | *
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305 | * \param[in] value The value TRUE (non-zero) or FALSE (zero).)
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306 | */
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307 | void Sd2Card::partialBlockRead(uint8_t value) {
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308 | readEnd(); |
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309 | partialBlockRead_ = value; |
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310 | } |
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311 | //------------------------------------------------------------------------------
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312 | /**
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313 | * Read a 512 byte block from an SD card device.
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314 | *
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315 | * \param[in] block Logical block to be read.
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316 | * \param[out] dst Pointer to the location that will receive the data.
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317 | |||
318 | * \return The value one, true, is returned for success and
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319 | * the value zero, false, is returned for failure.
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320 | */
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321 | uint8_t Sd2Card::readBlock(uint32_t block, uint8_t* dst) { |
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322 | return readData(block, 0, 512, dst); |
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323 | } |
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324 | //------------------------------------------------------------------------------
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325 | /**
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326 | * Read part of a 512 byte block from an SD card.
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327 | *
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328 | * \param[in] block Logical block to be read.
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329 | * \param[in] offset Number of bytes to skip at start of block
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330 | * \param[out] dst Pointer to the location that will receive the data.
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331 | * \param[in] count Number of bytes to read
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332 | * \return The value one, true, is returned for success and
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333 | * the value zero, false, is returned for failure.
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334 | */
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335 | uint8_t Sd2Card::readData(uint32_t block, |
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336 | uint16_t offset, uint16_t count, uint8_t* dst) { |
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337 | uint16_t n; |
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338 | if (count == 0) return true; |
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339 | if ((count + offset) > 512) { |
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340 | goto fail;
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341 | } |
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342 | if (!inBlock_ || block != block_ || offset < offset_) {
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343 | block_ = block; |
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344 | // use address if not SDHC card
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345 | if (type()!= SD_CARD_TYPE_SDHC) block <<= 9; |
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346 | if (cardCommand(CMD17, block)) {
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347 | error(SD_CARD_ERROR_CMD17); |
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348 | goto fail;
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349 | } |
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350 | if (!waitStartBlock()) {
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351 | goto fail;
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352 | } |
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353 | offset_ = 0;
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354 | inBlock_ = 1;
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355 | } |
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356 | |||
357 | #ifdef OPTIMIZE_HARDWARE_SPI
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358 | // start first spi transfer
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359 | SPDR = 0XFF;
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360 | |||
361 | // skip data before offset
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362 | for (;offset_ < offset; offset_++) {
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363 | while (!(SPSR & (1 << SPIF))); |
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364 | SPDR = 0XFF;
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365 | } |
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366 | // transfer data
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367 | n = count - 1;
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368 | for (uint16_t i = 0; i < n; i++) { |
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369 | while (!(SPSR & (1 << SPIF))); |
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370 | dst[i] = SPDR; |
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371 | SPDR = 0XFF;
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372 | } |
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373 | // wait for last byte
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374 | while (!(SPSR & (1 << SPIF))); |
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375 | dst[n] = SPDR; |
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376 | |||
377 | #else // OPTIMIZE_HARDWARE_SPI |
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378 | |||
379 | // skip data before offset
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380 | for (;offset_ < offset; offset_++) {
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381 | spiRec(); |
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382 | } |
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383 | // transfer data
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384 | for (uint16_t i = 0; i < count; i++) { |
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385 | dst[i] = spiRec(); |
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386 | } |
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387 | #endif // OPTIMIZE_HARDWARE_SPI |
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388 | |||
389 | offset_ += count; |
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390 | if (!partialBlockRead_ || offset_ >= 512) { |
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391 | // read rest of data, checksum and set chip select high
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392 | readEnd(); |
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393 | } |
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394 | return true; |
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395 | |||
396 | fail:
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397 | chipSelectHigh(); |
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398 | return false; |
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399 | } |
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400 | //------------------------------------------------------------------------------
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401 | /** Skip remaining data in a block when in partial block read mode. */
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402 | void Sd2Card::readEnd(void) { |
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403 | if (inBlock_) {
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404 | // skip data and crc
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405 | #ifdef OPTIMIZE_HARDWARE_SPI
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406 | // optimize skip for hardware
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407 | SPDR = 0XFF;
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408 | while (offset_++ < 513) { |
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409 | while (!(SPSR & (1 << SPIF))); |
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410 | SPDR = 0XFF;
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411 | } |
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412 | // wait for last crc byte
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413 | while (!(SPSR & (1 << SPIF))); |
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414 | #else // OPTIMIZE_HARDWARE_SPI |
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415 | while (offset_++ < 514) spiRec(); |
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416 | #endif // OPTIMIZE_HARDWARE_SPI |
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417 | chipSelectHigh(); |
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418 | inBlock_ = 0;
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419 | } |
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420 | } |
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421 | //------------------------------------------------------------------------------
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422 | /** read CID or CSR register */
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423 | uint8_t Sd2Card::readRegister(uint8_t cmd, void* buf) {
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424 | uint8_t* dst = reinterpret_cast<uint8_t*>(buf);
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425 | if (cardCommand(cmd, 0)) { |
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426 | error(SD_CARD_ERROR_READ_REG); |
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427 | goto fail;
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428 | } |
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429 | if (!waitStartBlock()) goto fail; |
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430 | // transfer data
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431 | for (uint16_t i = 0; i < 16; i++) dst[i] = spiRec(); |
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432 | spiRec(); // get first crc byte
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433 | spiRec(); // get second crc byte
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434 | chipSelectHigh(); |
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435 | return true; |
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436 | |||
437 | fail:
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438 | chipSelectHigh(); |
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439 | return false; |
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440 | } |
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441 | //------------------------------------------------------------------------------
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442 | /**
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443 | * Set the SPI clock rate.
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444 | *
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445 | * \param[in] sckRateID A value in the range [0, 6].
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446 | *
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447 | * The SPI clock will be set to F_CPU/pow(2, 1 + sckRateID). The maximum
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448 | * SPI rate is F_CPU/2 for \a sckRateID = 0 and the minimum rate is F_CPU/128
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449 | * for \a scsRateID = 6.
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450 | *
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451 | * \return The value one, true, is returned for success and the value zero,
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452 | * false, is returned for an invalid value of \a sckRateID.
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453 | */
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454 | uint8_t Sd2Card::setSckRate(uint8_t sckRateID) { |
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455 | if (sckRateID > 6) { |
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456 | error(SD_CARD_ERROR_SCK_RATE); |
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457 | return false; |
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458 | } |
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459 | // see avr processor datasheet for SPI register bit definitions
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460 | if ((sckRateID & 1) || sckRateID == 6) { |
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461 | SPSR &= ~(1 << SPI2X);
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462 | } else {
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463 | SPSR |= (1 << SPI2X);
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464 | } |
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465 | SPCR &= ~((1 <<SPR1) | (1 << SPR0)); |
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466 | SPCR |= (sckRateID & 4 ? (1 << SPR1) : 0) |
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467 | | (sckRateID & 2 ? (1 << SPR0) : 0); |
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468 | return true; |
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469 | } |
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470 | //------------------------------------------------------------------------------
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471 | // wait for card to go not busy
|
||
472 | uint8_t Sd2Card::waitNotBusy(uint16_t timeoutMillis) { |
||
473 | uint16_t t0 = millis(); |
||
474 | do {
|
||
475 | if (spiRec() == 0XFF) return true; |
||
476 | } |
||
477 | while (((uint16_t)millis() - t0) < timeoutMillis);
|
||
478 | return false; |
||
479 | } |
||
480 | //------------------------------------------------------------------------------
|
||
481 | /** Wait for start block token */
|
||
482 | uint8_t Sd2Card::waitStartBlock(void) {
|
||
483 | uint16_t t0 = millis(); |
||
484 | while ((status_ = spiRec()) == 0XFF) { |
||
485 | if (((uint16_t)millis() - t0) > SD_READ_TIMEOUT) {
|
||
486 | error(SD_CARD_ERROR_READ_TIMEOUT); |
||
487 | goto fail;
|
||
488 | } |
||
489 | } |
||
490 | if (status_ != DATA_START_BLOCK) {
|
||
491 | error(SD_CARD_ERROR_READ); |
||
492 | goto fail;
|
||
493 | } |
||
494 | return true; |
||
495 | |||
496 | fail:
|
||
497 | chipSelectHigh(); |
||
498 | return false; |
||
499 | } |
||
500 | //------------------------------------------------------------------------------
|
||
501 | /**
|
||
502 | * Writes a 512 byte block to an SD card.
|
||
503 | *
|
||
504 | * \param[in] blockNumber Logical block to be written.
|
||
505 | * \param[in] src Pointer to the location of the data to be written.
|
||
506 | * \return The value one, true, is returned for success and
|
||
507 | * the value zero, false, is returned for failure.
|
||
508 | */
|
||
509 | uint8_t Sd2Card::writeBlock(uint32_t blockNumber, const uint8_t* src) {
|
||
510 | #if SD_PROTECT_BLOCK_ZERO
|
||
511 | // don't allow write to first block
|
||
512 | if (blockNumber == 0) { |
||
513 | error(SD_CARD_ERROR_WRITE_BLOCK_ZERO); |
||
514 | goto fail;
|
||
515 | } |
||
516 | #endif // SD_PROTECT_BLOCK_ZERO |
||
517 | |||
518 | // use address if not SDHC card
|
||
519 | if (type() != SD_CARD_TYPE_SDHC) blockNumber <<= 9; |
||
520 | if (cardCommand(CMD24, blockNumber)) {
|
||
521 | error(SD_CARD_ERROR_CMD24); |
||
522 | goto fail;
|
||
523 | } |
||
524 | if (!writeData(DATA_START_BLOCK, src)) goto fail; |
||
525 | |||
526 | // wait for flash programming to complete
|
||
527 | if (!waitNotBusy(SD_WRITE_TIMEOUT)) {
|
||
528 | error(SD_CARD_ERROR_WRITE_TIMEOUT); |
||
529 | goto fail;
|
||
530 | } |
||
531 | // response is r2 so get and check two bytes for nonzero
|
||
532 | if (cardCommand(CMD13, 0) || spiRec()) { |
||
533 | error(SD_CARD_ERROR_WRITE_PROGRAMMING); |
||
534 | goto fail;
|
||
535 | } |
||
536 | chipSelectHigh(); |
||
537 | return true; |
||
538 | |||
539 | fail:
|
||
540 | chipSelectHigh(); |
||
541 | return false; |
||
542 | } |
||
543 | //------------------------------------------------------------------------------
|
||
544 | /** Write one data block in a multiple block write sequence */
|
||
545 | uint8_t Sd2Card::writeData(const uint8_t* src) {
|
||
546 | // wait for previous write to finish
|
||
547 | if (!waitNotBusy(SD_WRITE_TIMEOUT)) {
|
||
548 | error(SD_CARD_ERROR_WRITE_MULTIPLE); |
||
549 | chipSelectHigh(); |
||
550 | return false; |
||
551 | } |
||
552 | return writeData(WRITE_MULTIPLE_TOKEN, src);
|
||
553 | } |
||
554 | //------------------------------------------------------------------------------
|
||
555 | // send one block of data for write block or write multiple blocks
|
||
556 | uint8_t Sd2Card::writeData(uint8_t token, const uint8_t* src) {
|
||
557 | #ifdef OPTIMIZE_HARDWARE_SPI
|
||
558 | |||
559 | // send data - optimized loop
|
||
560 | SPDR = token; |
||
561 | |||
562 | // send two byte per iteration
|
||
563 | for (uint16_t i = 0; i < 512; i += 2) { |
||
564 | while (!(SPSR & (1 << SPIF))); |
||
565 | SPDR = src[i]; |
||
566 | while (!(SPSR & (1 << SPIF))); |
||
567 | SPDR = src[i+1];
|
||
568 | } |
||
569 | |||
570 | // wait for last data byte
|
||
571 | while (!(SPSR & (1 << SPIF))); |
||
572 | |||
573 | #else // OPTIMIZE_HARDWARE_SPI |
||
574 | spiSend(token); |
||
575 | for (uint16_t i = 0; i < 512; i++) { |
||
576 | spiSend(src[i]); |
||
577 | } |
||
578 | #endif // OPTIMIZE_HARDWARE_SPI |
||
579 | spiSend(0xff); // dummy crc |
||
580 | spiSend(0xff); // dummy crc |
||
581 | |||
582 | status_ = spiRec(); |
||
583 | if ((status_ & DATA_RES_MASK) != DATA_RES_ACCEPTED) {
|
||
584 | error(SD_CARD_ERROR_WRITE); |
||
585 | chipSelectHigh(); |
||
586 | return false; |
||
587 | } |
||
588 | return true; |
||
589 | } |
||
590 | //------------------------------------------------------------------------------
|
||
591 | /** Start a write multiple blocks sequence.
|
||
592 | *
|
||
593 | * \param[in] blockNumber Address of first block in sequence.
|
||
594 | * \param[in] eraseCount The number of blocks to be pre-erased.
|
||
595 | *
|
||
596 | * \note This function is used with writeData() and writeStop()
|
||
597 | * for optimized multiple block writes.
|
||
598 | *
|
||
599 | * \return The value one, true, is returned for success and
|
||
600 | * the value zero, false, is returned for failure.
|
||
601 | */
|
||
602 | uint8_t Sd2Card::writeStart(uint32_t blockNumber, uint32_t eraseCount) { |
||
603 | #if SD_PROTECT_BLOCK_ZERO
|
||
604 | // don't allow write to first block
|
||
605 | if (blockNumber == 0) { |
||
606 | error(SD_CARD_ERROR_WRITE_BLOCK_ZERO); |
||
607 | goto fail;
|
||
608 | } |
||
609 | #endif // SD_PROTECT_BLOCK_ZERO |
||
610 | // send pre-erase count
|
||
611 | if (cardAcmd(ACMD23, eraseCount)) {
|
||
612 | error(SD_CARD_ERROR_ACMD23); |
||
613 | goto fail;
|
||
614 | } |
||
615 | // use address if not SDHC card
|
||
616 | if (type() != SD_CARD_TYPE_SDHC) blockNumber <<= 9; |
||
617 | if (cardCommand(CMD25, blockNumber)) {
|
||
618 | error(SD_CARD_ERROR_CMD25); |
||
619 | goto fail;
|
||
620 | } |
||
621 | return true; |
||
622 | |||
623 | fail:
|
||
624 | chipSelectHigh(); |
||
625 | return false; |
||
626 | } |
||
627 | //------------------------------------------------------------------------------
|
||
628 | /** End a write multiple blocks sequence.
|
||
629 | *
|
||
630 | * \return The value one, true, is returned for success and
|
||
631 | * the value zero, false, is returned for failure.
|
||
632 | */
|
||
633 | uint8_t Sd2Card::writeStop(void) {
|
||
634 | if (!waitNotBusy(SD_WRITE_TIMEOUT)) goto fail; |
||
635 | spiSend(STOP_TRAN_TOKEN); |
||
636 | if (!waitNotBusy(SD_WRITE_TIMEOUT)) goto fail; |
||
637 | chipSelectHigh(); |
||
638 | return true; |
||
639 | |||
640 | fail:
|
||
641 | error(SD_CARD_ERROR_STOP_TRAN); |
||
642 | chipSelectHigh(); |
||
643 | return false; |
||
644 | } |