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Rev | Author | Line No. | Line |
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1704 | - | 1 | #include <avr/io.h> |
2 | #include <util/delay.h> |
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3 | #include <string.h> |
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4 | #include "sdc.h" |
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5 | #include "ssc.h" |
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6 | #include "timer0.h" |
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7 | #include "printf_P.h" |
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8 | #include "crc16.h" |
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9 | |||
10 | //#define _SD_DEBUG |
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11 | |||
12 | #define CMD_GO_IDLE_STATE 0x00 /* CMD00: response R1 */ |
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13 | #define CMD_SEND_OP_COND 0x01 /* CMD01: response R1 */ |
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14 | #define CMD_SEND_IF_COND 0x08 /* CMD08: response R7 */ |
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15 | #define CMD_SEND_CSD 0x09 /* CMD09: response R1 */ |
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16 | #define CMD_SEND_CID 0x0A /* CMD10: response R1 */ |
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17 | #define CMD_SEND_STATUS 0x0D /* CMD13: response R2 */ |
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18 | #define CMD_SET_BLOCKLEN 0x10 /* CMD16: arg0[31:0]: block length, response R1*/ |
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19 | #define CMD_READ_SINGLE_BLOCK 0x11 /* CMD17: arg0[31:0]: data address, response R1 */ |
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20 | #define CMD_WRITE_SINGLE_BLOCK 0x18 /* CMD24: arg0[31:0]: data address, response R1 */ |
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21 | #define CMD_APP_CMD 0x37 /* CMD55: response R1 */ |
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22 | #define CMD_READ_OCR 0x3A /* CMD58: response R3 */ |
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23 | #define CMD_CRC_ON_OFF 0x3B /* CMD59: arg0[31:1]: stuff bits, arg0[0:0]: crc option, response R1 */ |
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24 | #define ACMD_SEND_OP_COND 0x29 /* ACMD41: arg0[31]: stuff bits, arg0[30]: HCS, arg0[29:0] stuff bits*, response R1 */ |
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25 | |||
26 | #define R1_NO_ERR 0x00 |
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27 | #define R1_IDLE_STATE 0x01 |
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28 | #define R1_ERASE_RESET 0x02 |
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29 | #define R1_ILLEGAL_CMD 0x04 |
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30 | #define R1_COM_CRC_ERR 0x08 |
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31 | #define R1_ERASE_SEQUENCE_ERR 0x10 |
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32 | #define R1_ADDRESS_ERR 0x20 |
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33 | #define R1_PARAMETER_ERR 0x40 |
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34 | #define R1_BAD_RESPONSE 0x80 |
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35 | |||
36 | #define R2_NO_ERR 0x00 |
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37 | #define R2_CARD_LOCKED 0x01 |
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38 | #define R2_ERASE_WRITE_PROT_ERR 0x02 |
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39 | #define R2_UNKOWN_ERR 0x04 |
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40 | #define R2_CARD_CTRL_ERR 0x08 |
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41 | #define R2_CARD_ECC_ERR 0x10 |
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42 | #define R2_WRITE_PROT_ERR 0x20 |
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43 | #define R2_ERASE_PARAM_ERR 0x40 |
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44 | #define R2_OUT_OF_RANGE_ERR 0x80 |
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45 | |||
46 | #define DATA_START_TOKEN 0xFE |
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47 | #define DATA_RESPONSE_MASK 0x1F |
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48 | #define DATA_RESPONSE_OK 0x05 |
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49 | #define DATA_RESPONSE_CRC_ERR 0x0B |
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50 | #define DATA_RESPONSE_WRITE_ERR 0x1D |
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51 | |||
52 | typedef enum |
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53 | { |
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54 | VER_UNKNOWN, |
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55 | VER_1X, |
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56 | VER_20 |
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57 | } SDVersion_t; |
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58 | |||
59 | typedef struct |
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60 | { |
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61 | uint8_t Valid; |
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62 | SDVersion_t Version; // HW-Version |
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63 | uint32_t Capacity; // Memory capacity in bytes |
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64 | uint8_t CID[16]; // CID register |
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65 | uint8_t CSD[16]; // CSD register |
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66 | } __attribute__((packed)) SDCardInfo_t; |
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67 | |||
68 | |||
69 | volatile SDCardInfo_t SDCardInfo; |
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70 | |||
71 | //________________________________________________________________________________________________________________________________________ |
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72 | // Function: CRC7(uint8_t* cmd, uint32_t len); |
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73 | // |
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74 | // Description: This function calculated the CRC7 checksum used in the last byte of a spi command frame. |
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75 | // |
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76 | // |
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77 | // Returnvalue: the function returns the crc7 including bit 0 set to 1 |
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78 | //________________________________________________________________________________________________________________________________________ |
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79 | |||
80 | uint8_t CRC7(uint8_t *cmd, uint32_t len) |
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81 | { |
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82 | uint8_t i, a; |
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83 | uint8_t crc, Data; |
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84 | |||
85 | crc = 0; // init CRC buffer |
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86 | for (a = 0; a < len ;a++) // for every byte in the msg |
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87 | { |
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88 | Data = cmd[a]; |
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89 | for (i=0;i<8;i++) // for every bit in the byte |
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90 | { |
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91 | crc <<= 1; // shift crc |
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92 | if ((Data & 0x80)^(crc & 0x80)) crc ^=0x09; //xor |
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93 | Data <<= 1; // shift data for next bit |
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94 | } |
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95 | } |
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96 | crc = (crc<<1)|1; // set terminating bit to 1 |
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97 | return(crc); |
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98 | } |
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99 | |||
100 | |||
101 | uint8_t SDC_WaitForBusy(uint16_t timeout) |
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102 | { |
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103 | uint8_t rsp = 0; |
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104 | uint16_t timestamp = 0; |
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105 | |||
106 | SSC_Enable(); // enable chipselect. |
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107 | timestamp = SetDelay(timeout); |
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108 | do |
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109 | { |
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110 | rsp = SSC_GetChar(); |
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111 | if(CheckDelay(timestamp)) break; |
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112 | }while(rsp != 0xFF); // wait while card is busy (data out low) |
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113 | return(rsp); |
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114 | } |
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115 | |||
116 | //________________________________________________________________________________________________________________________________________ |
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117 | // Function: SDC_SendCMDR1(uint8_t CmdNo, uint32_t arg); |
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118 | // |
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119 | // Description: This function send a command frame to the SD-Card in spi-mode. |
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120 | // |
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121 | // |
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122 | // Returnvalue: The function returns the first response byte like for R1 commands |
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123 | //________________________________________________________________________________________________________________________________________ |
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124 | uint8_t SDC_SendCMDR1(uint8_t CmdNo, uint32_t arg) |
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125 | { |
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126 | uint8_t r1; |
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127 | uint16_t timeout = 0; |
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128 | uint16_t a; |
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129 | uint8_t cmd[6]; |
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130 | |||
131 | cmd[0] = 0x40|CmdNo; // set command index |
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132 | cmd[1] = (arg & 0xFF000000)>>24; |
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133 | cmd[2] = (arg & 0x00FF0000)>>16; |
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134 | cmd[3] = (arg & 0x0000FF00)>>8; |
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135 | cmd[4] = (arg & 0x000000FF); |
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136 | cmd[5] = CRC7(cmd, 5); // update checksum |
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137 | #ifdef _SD_DEBUG |
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138 | printf("\r\nCmd=%02X, arg=%04X%04X", CmdNo, (uint16_t)(arg>>16), (uint16_t)(0xFFFF & arg)); |
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139 | #endif |
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140 | SSC_Disable(); // disable chipselect. |
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141 | SSC_PutChar(0xFF); // dummy to sync |
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142 | SSC_Enable(); // enable chipselect. |
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143 | |||
144 | SDC_WaitForBusy(500); // wait 500ms until card is busy |
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145 | |||
146 | for (a = 0;a < 6; a++) // send the command sequence to the sdcard (6 bytes) |
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147 | { |
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148 | SSC_PutChar(cmd[a]); |
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149 | _delay_loop_2(10); |
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150 | } |
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151 | // get response byte |
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152 | do |
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153 | { |
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154 | r1 = SSC_GetChar(); // get byte from sd-card |
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155 | if (timeout++ > 500) break; |
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156 | }while(r1 == 0xFF); // wait for the response byte from sd-card. |
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157 | #ifdef _SD_DEBUG |
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158 | printf("-->R1=%02X", r1); |
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159 | #endif |
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160 | return(r1); |
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161 | } |
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162 | |||
163 | //________________________________________________________________________________________________________________________________________ |
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164 | // Function: SDC_SendACMDR1(uint8_t CmdNo, uint32_t arg); |
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165 | // |
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166 | // Description: This function send a application command frame to the SD-Card in spi-mode. |
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167 | // |
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168 | // |
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169 | // Returnvalue: The function returns the first response byte like for R1 commands |
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170 | //________________________________________________________________________________________________________________________________________ |
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171 | uint8_t SDC_SendACMDR1(uint8_t CmdNo, uint32_t arg) |
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172 | { |
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173 | uint8_t r1 = 0xFF; |
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174 | r1 = SDC_SendCMDR1(CMD_APP_CMD, 0UL); |
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175 | if(r1 & R1_BAD_RESPONSE) return(r1); |
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176 | r1 = SDC_SendCMDR1(CmdNo, arg); |
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177 | return(r1); |
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178 | } |
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179 | |||
180 | //________________________________________________________________________________________________________________________________________ |
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181 | // Function: SDC_GetData(uint8_t * cmd ,u8 *Buffer, u32 len); |
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182 | // |
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183 | // Description: This function sneds cmd an reads a datablock of len from the sd-card |
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184 | // |
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185 | // |
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186 | // Returnvalue: SD_Result_t |
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187 | //________________________________________________________________________________________________________________________________________ |
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188 | |||
189 | SD_Result_t SDC_GetData(uint8_t CmdNo, uint32_t addr, uint8_t *Buffer, uint32_t len) |
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190 | { |
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191 | uint8_t rsp; |
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192 | uint16_t a, crc16; |
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193 | SD_Result_t result = SD_ERROR_UNKNOWN; |
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194 | |||
195 | // send the command |
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196 | rsp = SDC_SendCMDR1(CmdNo, addr); |
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197 | if (rsp != R1_NO_ERR) |
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198 | { |
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199 | result = SD_ERROR_BAD_RESPONSE; |
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200 | goto end; |
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201 | } |
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202 | |||
203 | do |
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204 | { |
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205 | rsp = SSC_GetChar(); |
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206 | if((rsp & 0xF0) == 0x00) // data error token |
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207 | { |
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208 | result = SD_ERROR_READ_DATA; |
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209 | goto end; |
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210 | } |
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211 | }while(rsp != DATA_START_TOKEN); |
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212 | // data start token received |
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213 | for (a = 0; a < len; a++) // read the block from the SSC |
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214 | { |
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215 | Buffer[a] = SSC_GetChar(); |
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216 | } |
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217 | // Read two bytes CRC16-Data checksum |
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218 | crc16 = SSC_GetChar(); // highbyte first |
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219 | crc16 = (crc16<<8)|SSC_GetChar(); // lowbyte last |
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220 | /* if(crc16 != CRC16(Buffer, len)) result = SD_ERROR_CRC_DATA; |
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221 | else */result = SD_SUCCESS; |
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222 | |||
223 | end: |
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224 | if(result != SD_SUCCESS) |
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225 | { |
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226 | printf("Error %02X reading data from sd card (R1=%02X).\r\n", result, rsp); |
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227 | } |
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228 | return(result); |
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229 | } |
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230 | |||
231 | |||
232 | //________________________________________________________________________________________________________________________________________ |
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233 | // Function: SDC_PrintCID(u8 * pCID); |
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234 | // |
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235 | // Description: This function prints the CIS register in a human readable format. |
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236 | // |
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237 | // |
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238 | // Returnvalue: the function returns nothing |
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239 | //________________________________________________________________________________________________________________________________________ |
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240 | |||
241 | void SDC_PrintCID(uint8_t * pCID) |
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242 | { |
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243 | uint8_t pn[6]; |
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244 | uint16_t temp1, temp2; |
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245 | |||
246 | printf("\r\n Manufacturer ID: %i\r\n", pCID[0]); |
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247 | memcpy(pn, &pCID[1], 2); |
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248 | pn[2] = '\0'; // terminate string |
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249 | printf(" Application ID: %s\r\n",pn); |
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250 | memcpy(pn, &pCID[3], 5); |
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251 | pn[5] = '\0'; // terminate string |
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252 | printf(" Product Name: %s\r\n",pn); |
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253 | printf(" Product Rev.: %i.%i\r\n",pCID[8]>>4, pCID[8]&0xF); |
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254 | printf(" Serial No.: "); |
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255 | for(temp1 = 0; temp1<4; temp1++) |
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256 | { |
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257 | printf("%02X", pCID[9+temp1]); |
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258 | } |
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259 | printf("\r\n"); |
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260 | temp1 = pCID[14] & 0x0F; // month |
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261 | temp2 = ((pCID[14]>>4)|(pCID[13]<<4)) + 2000; // year |
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262 | printf(" Manufac. Date: %i/%i\r\n\r\n",temp1, temp2); |
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263 | } |
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264 | |||
265 | //________________________________________________________________________________________________________________________________________ |
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266 | // Function: SDC_GetCID(uint8_t * pCID); |
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267 | // |
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268 | // Description: This function reads the CIS register form the sd card in spi mode. |
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269 | // |
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270 | // |
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271 | // Returnvalue: the function returns error state |
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272 | //________________________________________________________________________________________________________________________________________ |
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273 | |||
274 | SD_Result_t SDC_GetCID(uint8_t * pCID) |
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275 | { |
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276 | return SDC_GetData(CMD_SEND_CID, 0UL, pCID, 16); |
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277 | } |
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278 | |||
279 | //________________________________________________________________________________________________________________________________________ |
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280 | // Function: SDC_GetCSD(uint8_t * pCSD); |
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281 | // |
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282 | // Description: This function reads the CSD register form the sd card in spi mode. |
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283 | // |
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284 | // |
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285 | // Returnvalue: the function returns error state |
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286 | //________________________________________________________________________________________________________________________________________ |
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287 | |||
288 | SD_Result_t SDC_GetCSD(uint8_t * pCSD) |
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289 | { |
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290 | return SDC_GetData(CMD_SEND_CSD, 0UL, pCSD, 16); |
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291 | } |
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292 | |||
293 | |||
294 | //________________________________________________________________________________________________________________________________________ |
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295 | // Function: SDC_Init(void); |
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296 | // |
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297 | // Description: This function initialises the SDCard to spi-mode. |
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298 | // |
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299 | // |
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300 | // Returnvalue: the function returns 0 if the initialisation was successfull otherwise the function returns an errorcode. |
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301 | //________________________________________________________________________________________________________________________________________ |
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302 | |||
303 | SD_Result_t SDC_Init(void) |
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304 | { |
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305 | uint16_t timeout = 0; |
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306 | uint8_t rsp[6]; // SD-SPI response buffer |
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307 | SD_Result_t result = SD_ERROR_UNKNOWN; |
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308 | |||
309 | if(SD_SWITCH) // init only if the SD-Switch is indicating a card in the slot |
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310 | { |
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311 | printf("\r\n SSC init..."); |
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312 | SSC_Init(); |
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313 | printf("ok"); |
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314 | |||
315 | //_delay_loop_2(1050); |
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316 | |||
317 | printf("\r\n SDC init..."); |
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318 | SDCardInfo.Valid = 0; |
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319 | /* The host shall supply power to the card so that the voltage is reached to Vdd_min within 250ms and |
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320 | start to supply at least 74 SD clocks to the SD card with keeping cmd line to high. In case of SPI |
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321 | mode, CS shall be held to high during 74 clock cycles. */ |
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322 | SSC_Disable(); // set SD_CS high |
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323 | for (timeout = 0; timeout < 15; timeout++) // 15*8 = 120 cycles |
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324 | { |
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325 | SSC_PutChar(0xFF); |
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326 | } |
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327 | |||
328 | // switch to idle state |
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329 | #ifdef _SD_DEBUG |
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330 | printf("\r\nGoing idle state.."); |
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331 | #endif |
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332 | timeout = 0; |
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333 | do |
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334 | { |
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335 | rsp[0] = SDC_SendCMDR1(CMD_GO_IDLE_STATE, 0UL); |
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336 | if (timeout++ > 500) |
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337 | { |
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338 | printf("reset timeout"); |
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339 | result = SD_ERROR_RESET; |
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340 | goto end; |
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341 | } |
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342 | }while(rsp[0] != R1_IDLE_STATE); |
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343 | // enable crc feature |
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344 | /* if(SDC_SendCMDR1(CMD_CRC_ON_OFF, 1UL) != R1_IDLE_STATE) |
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345 | { |
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346 | printf("Bad cmd59 R1=%02X.", rsp[0]); |
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347 | result = SD_ERROR_BAD_RESPONSE; |
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348 | goto end; |
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349 | }*/ |
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350 | // check for card hw version |
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351 | // 2.7-3.6V Range = 0x01, check pattern 0xAA |
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352 | rsp[0] = SDC_SendCMDR1(CMD_SEND_IF_COND, 0x000001AA); |
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353 | // answer to cmd58 is an R7 response (R1+ 4Byte IFCond) |
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354 | if(rsp[0] & R1_BAD_RESPONSE) |
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355 | { |
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356 | printf("Bad cmd8 R1=%02X.", rsp[0]); |
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357 | result = SD_ERROR_BAD_RESPONSE; |
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358 | goto end; |
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359 | } |
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360 | if(rsp[0] & R1_ILLEGAL_CMD) |
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361 | { |
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362 | //Ver1.X SD Memory Card or not a SD Memory Card |
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363 | SDCardInfo.Version = VER_1X; |
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364 | } |
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365 | else |
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366 | { |
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367 | // Ver2.00 or later SD Memory Card |
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368 | // reading the remaining bytes of the R7 response |
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369 | SDCardInfo.Version = VER_20; |
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370 | for(timeout = 1; timeout < 5; timeout++) |
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371 | { |
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372 | rsp[timeout] = SSC_GetChar(); |
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373 | } |
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374 | //check pattern |
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375 | if(rsp[4]!= 0xAA) |
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376 | { |
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377 | printf("Bad cmd8 R7 check pattern.\r\n"); |
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378 | result = SD_ERROR_BAD_RESPONSE; |
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379 | goto end; |
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380 | } |
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381 | if ( (rsp[3] & 0x0F)!= 0x01 ) // voltage range is not 2.7-3.6V |
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382 | { |
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383 | |||
384 | printf("Card is incompatible to 3.3V.\r\n"); |
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385 | result = SD_ERROR_BAD_VOLTAGE_RANGE; |
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386 | goto end; |
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387 | } |
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388 | } |
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389 | |||
390 | rsp[0] = SDC_SendCMDR1(CMD_READ_OCR, 0UL); |
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391 | // answer to cmd58 is an R3 response (R1 + 4Byte OCR) |
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392 | if(rsp[0] & R1_BAD_RESPONSE) |
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393 | { |
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394 | printf("Bad cmd58 R1 %02x.", rsp[0]); |
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395 | result = SD_ERROR_BAD_RESPONSE; |
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396 | goto end; |
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397 | } |
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398 | if(rsp[0] & R1_ILLEGAL_CMD) |
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399 | { |
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400 | printf("Not an SD-CARD."); |
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401 | result = SD_ERROR_NO_SDCARD; |
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402 | goto end; |
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403 | } |
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404 | // read 4 bytes of OCR register |
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405 | for(timeout = 1; timeout < 5; timeout++) |
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406 | { |
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407 | rsp[timeout] = SSC_GetChar(); |
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408 | } |
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409 | // FollowMe & SD-Logger uses 3.3 V, therefore check for bit 20 & 21 |
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410 | if((rsp[2] & 0x30) != 0x30) |
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411 | { |
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412 | // supply voltage is not supported by sd-card |
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413 | printf("Card is incompatible to 3.3V."); |
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414 | result = SD_ERROR_BAD_VOLTAGE_RANGE; |
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415 | goto end; |
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416 | } |
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417 | |||
418 | // Initialize the sd-card sending continously ACMD_SEND_OP_COND (only supported by SD cards) |
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419 | timeout = SetDelay(2000); // set timeout to 2000 ms (large cards tend to longer) |
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420 | do |
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421 | { |
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422 | rsp[0] = SDC_SendACMDR1(ACMD_SEND_OP_COND, 0UL); |
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423 | if(rsp[0] & R1_BAD_RESPONSE) |
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424 | { |
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425 | printf("Bad Acmd41 R1=%02X.", rsp[0]); |
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426 | result = SD_ERROR_BAD_RESPONSE; |
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427 | goto end; |
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428 | } |
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429 | if(CheckDelay(timeout)) |
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430 | { |
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431 | printf("Init timeout."); |
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432 | result = SD_ERROR_INITIALIZE; |
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433 | goto end; |
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434 | } |
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435 | } while(rsp[0] & R1_IDLE_STATE); // loop until idle state |
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436 | |||
437 | if(rsp[0] != R1_NO_ERR) |
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438 | { |
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439 | printf("Init error."); |
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440 | result = SD_ERROR_INITIALIZE; |
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441 | goto end; |
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442 | } |
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443 | /* set block size to 512 bytes */ |
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444 | if(SDC_SendCMDR1(CMD_SET_BLOCKLEN, 512UL) != R1_NO_ERR) |
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445 | { |
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446 | printf("Error setting block length to 512."); |
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447 | result = SD_ERROR_SET_BLOCKLEN; |
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448 | goto end; |
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449 | } |
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450 | |||
451 | //SSC_Disable(); // set SD_CS high |
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452 | // here is the right place to inrease the SPI baud rate to maximum |
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453 | //SSC_Enable(); // set SD_CS high |
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454 | |||
455 | // read CID register |
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456 | result = SDC_GetCID((uint8_t *)&SDCardInfo.CID); |
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457 | if(result != SD_SUCCESS) |
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458 | { |
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459 | printf("Error reading CID.\r\n"); |
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460 | goto end; |
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461 | } |
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462 | |||
463 | // read CSD register |
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464 | result = SDC_GetCSD((uint8_t *)&SDCardInfo.CSD); |
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465 | if(result != SD_SUCCESS) |
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466 | { |
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467 | printf("Error reading CSD."); |
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468 | goto end; |
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469 | } |
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470 | |||
471 | printf("ok\r\n"); |
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472 | |||
473 | uint8_t c_size_mult, read_bl_len; |
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474 | uint32_t c_size; |
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475 | |||
476 | switch(SDCardInfo.CSD[0]>>6) // check CSD Version |
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477 | { |
||
478 | case 0x00: // if CSD is V1.0 structure (2GB limit) |
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479 | |||
480 | /* |
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481 | memory capacity = BLOCKNR * BLOCK_LEN |
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482 | BLOCKNR = (C_SIZE+1) * MULT |
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483 | MULT = 2^(C_SIZE_MULT+2) |
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484 | BLOCK_LEN = 2^READ_BL_LEN |
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485 | |||
486 | C_SIZE is 12 bits [73:62] in CSD register |
||
487 | C_SIZE_MULT is 3 bits [49:47] in CSD register |
||
488 | READ_BL_LEN is 4 bits [83:80] in CSD register |
||
489 | */ |
||
490 | |||
491 | read_bl_len = (SDCardInfo.CSD[5] & 0x0F); //CSD[05] -> [87:80] |
||
492 | c_size = ((uint32_t)(SDCardInfo.CSD[6] & 0x03))<<10; //CSD[06] -> [79:72] |
||
493 | c_size |= ((uint32_t)SDCardInfo.CSD[7])<<2; //CSD[07] -> [71:64] |
||
494 | c_size |= (uint32_t)(SDCardInfo.CSD[8]>>6); //CSD[08] -> [63:56] |
||
495 | c_size_mult = (SDCardInfo.CSD[9] & 0x03)<<1; //CSD[09] -> [55:48] |
||
496 | c_size_mult |=(SDCardInfo.CSD[10] & 0x80)>>7; //CSD[10] -> [47:40] |
||
497 | SDCardInfo.Capacity = (uint32_t)(c_size+1)*(1L<<(c_size_mult+2))*(1L<<read_bl_len); |
||
498 | break; |
||
499 | |||
500 | case 0x01: // if CSD is V2.0 structure (HC SD-Card > 2GB) |
||
501 | |||
502 | /* |
||
503 | memory capacity = (C_SIZE+1) * 512K byte |
||
504 | C_SIZE is 22 bits [69:48] in CSR register |
||
505 | */ |
||
506 | |||
507 | c_size = ((uint32_t)(SDCardInfo.CSD[7] & 0x3F))<<16; //CSD[07] -> [71:64] |
||
508 | c_size |= ((uint32_t)SDCardInfo.CSD[8])<<8; //CSD[08] -> [63:56] |
||
509 | c_size |= (uint32_t)SDCardInfo.CSD[9]; //CSD[09] -> [55:48]; |
||
510 | SDCardInfo.Capacity = (c_size + 1)* 512L * 1024L; |
||
511 | break; |
||
512 | |||
513 | default: //unknown CSD Version |
||
514 | SDCardInfo.Capacity = 0; |
||
515 | break; |
||
516 | } |
||
517 | |||
518 | switch(SDCardInfo.Version) |
||
519 | { |
||
520 | case VER_1X: |
||
521 | printf("\r\n SD-CARD V1.x"); |
||
522 | break; |
||
523 | case VER_20: |
||
524 | printf("\r\n SD-CARD V2.0 or later"); |
||
525 | default: |
||
526 | break; |
||
527 | } |
||
528 | uint16_t mb_size = (uint16_t)(SDCardInfo.Capacity/(1024L*1024L)); |
||
529 | printf("\r\n Capacity = %i MB", mb_size); |
||
530 | |||
531 | SDC_PrintCID((uint8_t *)&SDCardInfo.CID); |
||
532 | SDCardInfo.Valid = 1; |
||
533 | // jump point for error condition before |
||
534 | end: |
||
535 | SSC_Disable(); |
||
536 | } |
||
537 | else |
||
538 | { |
||
539 | SSC_Deinit(); |
||
540 | SDCardInfo.Valid = 0; |
||
541 | result = SD_ERROR_NOCARD; |
||
542 | printf("No Card in Slot."); |
||
543 | } |
||
544 | return(result); |
||
545 | } |
||
546 | |||
547 | |||
548 | //________________________________________________________________________________________________________________________________________ |
||
549 | // Function: SDC_Deinit(void); |
||
550 | // |
||
551 | // Description: This function deinitialises the SDCard interface. |
||
552 | // |
||
553 | // |
||
554 | // Returnvalue: the function returns 0 if the initialisation was successfull otherwise the function returns an errorcode. |
||
555 | //________________________________________________________________________________________________________________________________________ |
||
556 | |||
557 | SD_Result_t SDC_Deinit(void) |
||
558 | { |
||
559 | printf("\r\n SDC deinit..."); |
||
560 | SSC_Deinit(); |
||
561 | |||
562 | SDCardInfo.Valid = 0; |
||
563 | SDCardInfo.Capacity = 0; |
||
564 | SDCardInfo.Version = VER_UNKNOWN; |
||
565 | |||
566 | printf("ok"); |
||
567 | return(SD_SUCCESS); |
||
568 | } |
||
569 | |||
570 | //________________________________________________________________________________________________________________________________________ |
||
571 | // Function: SDC_PutSector(uint32_t addr, const uint8_t *Buffer) |
||
572 | // |
||
573 | // Description: This function writes one sector of data to the SSC |
||
574 | // |
||
575 | // |
||
576 | // Returnvalue: SD_Result_t |
||
577 | //________________________________________________________________________________________________________________________________________ |
||
578 | |||
579 | SD_Result_t SDC_PutSector(uint32_t addr, const uint8_t *Buffer) |
||
580 | { |
||
581 | uint8_t rsp; |
||
582 | uint16_t a, crc16; |
||
583 | uint16_t timeout = 0; |
||
584 | SD_Result_t result = SD_ERROR_UNKNOWN; |
||
585 | |||
586 | addr = addr << 9; // convert sectoradress to byteadress |
||
587 | rsp = SDC_SendCMDR1(CMD_WRITE_SINGLE_BLOCK, addr); |
||
588 | if (rsp != R1_NO_ERR) |
||
589 | { |
||
590 | result = SD_ERROR_BAD_RESPONSE; |
||
591 | goto end; |
||
592 | } |
||
593 | |||
594 | for (a=0;a<20;a++) // at least one byte |
||
595 | { |
||
596 | SSC_GetChar(); |
||
597 | } |
||
598 | crc16 = CRC16(Buffer, 512); // calc checksum for data block |
||
599 | SSC_PutChar(DATA_START_TOKEN); // send data start of header to the SSC |
||
600 | |||
601 | for (a=0;a<512;a++) // transmit one sector (normaly 512bytes) of data to the sdcard. |
||
602 | { |
||
603 | SSC_PutChar(Buffer[a]); |
||
604 | } |
||
605 | // write two bytes of crc16 to the sdcard |
||
606 | SSC_PutChar((uint8_t)(crc16>>8)); // write high byte first |
||
607 | SSC_PutChar((uint8_t)(0x00FF&crc16)); // lowbyte last |
||
608 | |||
609 | do // wait for data response token |
||
610 | { |
||
611 | rsp = SSC_GetChar(); |
||
612 | if(timeout++ > 500) |
||
613 | { |
||
614 | result = SD_ERROR_TIMEOUT; |
||
615 | goto end; |
||
616 | } |
||
617 | }while((rsp & 0x11) != 0x01 ); |
||
618 | // analyse data response token |
||
619 | switch(rsp & DATA_RESPONSE_MASK) |
||
620 | { |
||
621 | case DATA_RESPONSE_OK: |
||
622 | result = SD_SUCCESS; |
||
623 | break; |
||
624 | case DATA_RESPONSE_CRC_ERR: |
||
625 | result = SD_ERROR_CRC_DATA; |
||
626 | goto end; |
||
627 | break; |
||
628 | case DATA_RESPONSE_WRITE_ERR: |
||
629 | result = SD_ERROR_WRITE_DATA; |
||
630 | goto end; |
||
631 | break; |
||
632 | default: |
||
633 | result = SD_ERROR_UNKNOWN; |
||
634 | goto end; |
||
635 | break; |
||
636 | |||
637 | } |
||
638 | // wait 2 seconds until the sdcard is busy. |
||
639 | rsp = SDC_WaitForBusy(2000); |
||
640 | if(rsp != 0xFF) |
||
641 | { |
||
642 | result = SD_ERROR_TIMEOUT; |
||
643 | goto end; |
||
644 | } |
||
645 | |||
646 | // check card status |
||
647 | rsp = SDC_SendCMDR1(CMD_SEND_STATUS, 0); |
||
648 | // first byte of R2 response is like R1 response |
||
649 | if(rsp != R1_NO_ERR) |
||
650 | { |
||
651 | result = SD_ERROR_BAD_RESPONSE; |
||
652 | SSC_GetChar(); // read out 2nd byte |
||
653 | goto end; |
||
654 | } |
||
655 | // 2nd byte of r2 response |
||
656 | rsp = SSC_GetChar(); |
||
657 | if(rsp != R2_NO_ERR) |
||
658 | { |
||
659 | result = SD_ERROR_WRITE_DATA; |
||
660 | SSC_GetChar(); |
||
661 | goto end; |
||
662 | } |
||
663 | end: |
||
664 | if(result != SD_SUCCESS) |
||
665 | { |
||
666 | printf("Error %02X writing data to sd card (R=%02X).\r\n", result, rsp); |
||
667 | } |
||
668 | return(result); |
||
669 | } |
||
670 | |||
671 | |||
672 | |||
673 | |||
674 | //________________________________________________________________________________________________________________________________________ |
||
675 | // Function: SDC_GetSector(uint32_t addr,uint8_t *Buffer); |
||
676 | // |
||
677 | // Description: This function reads one sector of data from the SSC |
||
678 | // |
||
679 | // |
||
680 | // Returnvalue: SD_Result_t |
||
681 | //________________________________________________________________________________________________________________________________________ |
||
682 | |||
683 | SD_Result_t SDC_GetSector(uint32_t addr,uint8_t *Buffer) |
||
684 | { |
||
685 | addr = addr << 9; // convert sectoradress to byteadress |
||
686 | return SDC_GetData(CMD_READ_SINGLE_BLOCK, addr, Buffer, 512); |
||
687 | } |
||
688 |