PokittoLib is the library needed for programming the Pokitto DIY game console (www.pokitto.com)
Dependents: YATTT sd_map_test cPong SnowDemo ... more
PokittoLib
Library for programming Pokitto hardware
How to Use
- Import this library to online compiler (see button "import" on the right hand side
- DO NOT import mbed-src anymore, a better version is now included inside PokittoLib
- Change My_settings.h according to your project
- Start coding!
libpff/mmc.cpp@71:531419862202, 2019-12-25 (annotated)
- Committer:
- Pokitto
- Date:
- Wed Dec 25 23:59:52 2019 +0000
- Revision:
- 71:531419862202
- Parent:
- 52:c04087025cab
Changed Mode2 C++ refresh code (graphical errors)
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
Pokitto | 52:c04087025cab | 1 | /*-----------------------------------------------------------------------*/ |
Pokitto | 52:c04087025cab | 2 | /* PFF - Low level disk control module for ATtiny85 (C)ChaN, 2009 */ |
Pokitto | 52:c04087025cab | 3 | /*-----------------------------------------------------------------------*/ |
Pokitto | 52:c04087025cab | 4 | |
Pokitto | 52:c04087025cab | 5 | |
Pokitto | 52:c04087025cab | 6 | |
Pokitto | 52:c04087025cab | 7 | #include "diskio.h" |
Pokitto | 52:c04087025cab | 8 | #include "mbed.h" |
Pokitto | 52:c04087025cab | 9 | #include "connect.h" |
Pokitto | 52:c04087025cab | 10 | #include "PokittoDisk.h" |
Pokitto | 52:c04087025cab | 11 | |
Pokitto | 52:c04087025cab | 12 | namespace PFFS { |
Pokitto | 52:c04087025cab | 13 | |
Pokitto | 52:c04087025cab | 14 | #define _WRITE_FUNC 1 |
Pokitto | 52:c04087025cab | 15 | |
Pokitto | 52:c04087025cab | 16 | /* Definitions for MMC/SDC command */ |
Pokitto | 52:c04087025cab | 17 | #define CMD0 (0x40+0) /* GO_IDLE_STATE */ |
Pokitto | 52:c04087025cab | 18 | #define CMD1 (0x40+1) /* SEND_OP_COND (MMC) */ |
Pokitto | 52:c04087025cab | 19 | #define ACMD41 (0xC0+41) /* SEND_OP_COND (SDC) */ |
Pokitto | 52:c04087025cab | 20 | #define CMD8 (0x40+8) /* SEND_IF_COND */ |
Pokitto | 52:c04087025cab | 21 | #define CMD16 (0x40+16) /* SET_BLOCKLEN */ |
Pokitto | 52:c04087025cab | 22 | #define CMD17 (0x40+17) /* READ_SINGLE_BLOCK */ |
Pokitto | 52:c04087025cab | 23 | #define CMD24 (0x40+24) /* WRITE_BLOCK */ |
Pokitto | 52:c04087025cab | 24 | #define CMD55 (0x40+55) /* APP_CMD */ |
Pokitto | 52:c04087025cab | 25 | #define CMD58 (0x40+58) /* READ_OCR */ |
Pokitto | 52:c04087025cab | 26 | |
Pokitto | 52:c04087025cab | 27 | |
Pokitto | 52:c04087025cab | 28 | |
Pokitto | 52:c04087025cab | 29 | /* Port Controls (Platform dependent) */ |
Pokitto | 52:c04087025cab | 30 | #define SELECT() CLR_SD_CS //mmccs.write(0) /* MMC CS = L */ |
Pokitto | 52:c04087025cab | 31 | #define DESELECT() SET_SD_CS // mmccs.write(1) /* MMC CS = H */ |
Pokitto | 52:c04087025cab | 32 | #define MMC_SEL !GET_SD_CS // !mmccs.read() /* MMC CS status (true:selected) */ |
Pokitto | 52:c04087025cab | 33 | |
Pokitto | 52:c04087025cab | 34 | void xmit_spi (BYTE c) { |
Pokitto | 52:c04087025cab | 35 | device.write(c); /* Send a byte */ |
Pokitto | 52:c04087025cab | 36 | } |
Pokitto | 52:c04087025cab | 37 | |
Pokitto | 52:c04087025cab | 38 | BYTE rcv_spi (void) { |
Pokitto | 52:c04087025cab | 39 | return device.write(0xff); |
Pokitto | 52:c04087025cab | 40 | } |
Pokitto | 52:c04087025cab | 41 | |
Pokitto | 52:c04087025cab | 42 | /*-------------------------------------------------------------------------- |
Pokitto | 52:c04087025cab | 43 | |
Pokitto | 52:c04087025cab | 44 | Module Private Functions |
Pokitto | 52:c04087025cab | 45 | |
Pokitto | 52:c04087025cab | 46 | ---------------------------------------------------------------------------*/ |
Pokitto | 52:c04087025cab | 47 | |
Pokitto | 52:c04087025cab | 48 | static |
Pokitto | 52:c04087025cab | 49 | BYTE CardType; |
Pokitto | 52:c04087025cab | 50 | |
Pokitto | 52:c04087025cab | 51 | |
Pokitto | 52:c04087025cab | 52 | /*-----------------------------------------------------------------------*/ |
Pokitto | 52:c04087025cab | 53 | /* Deselect the card and release SPI bus */ |
Pokitto | 52:c04087025cab | 54 | /*-----------------------------------------------------------------------*/ |
Pokitto | 52:c04087025cab | 55 | |
Pokitto | 52:c04087025cab | 56 | static |
Pokitto | 52:c04087025cab | 57 | void release_spi (void) { |
Pokitto | 52:c04087025cab | 58 | DESELECT(); |
Pokitto | 52:c04087025cab | 59 | rcv_spi(); |
Pokitto | 52:c04087025cab | 60 | } |
Pokitto | 52:c04087025cab | 61 | |
Pokitto | 52:c04087025cab | 62 | |
Pokitto | 52:c04087025cab | 63 | /*-----------------------------------------------------------------------*/ |
Pokitto | 52:c04087025cab | 64 | /* Send a command packet to MMC */ |
Pokitto | 52:c04087025cab | 65 | /*-----------------------------------------------------------------------*/ |
Pokitto | 52:c04087025cab | 66 | |
Pokitto | 52:c04087025cab | 67 | static |
Pokitto | 52:c04087025cab | 68 | BYTE send_cmd ( |
Pokitto | 52:c04087025cab | 69 | BYTE cmd, /* Command byte */ |
Pokitto | 52:c04087025cab | 70 | DWORD arg /* Argument */ |
Pokitto | 52:c04087025cab | 71 | ) { |
Pokitto | 52:c04087025cab | 72 | BYTE n, res; |
Pokitto | 52:c04087025cab | 73 | |
Pokitto | 52:c04087025cab | 74 | |
Pokitto | 52:c04087025cab | 75 | if (cmd & 0x80) { /* ACMD<n> is the command sequense of CMD55-CMD<n> */ |
Pokitto | 52:c04087025cab | 76 | cmd &= 0x7F; |
Pokitto | 52:c04087025cab | 77 | res = send_cmd(CMD55, 0); |
Pokitto | 52:c04087025cab | 78 | if (res > 1) return res; |
Pokitto | 52:c04087025cab | 79 | } |
Pokitto | 52:c04087025cab | 80 | |
Pokitto | 52:c04087025cab | 81 | /* Select the card */ |
Pokitto | 52:c04087025cab | 82 | DESELECT(); |
Pokitto | 52:c04087025cab | 83 | rcv_spi(); |
Pokitto | 52:c04087025cab | 84 | SELECT(); |
Pokitto | 52:c04087025cab | 85 | rcv_spi(); |
Pokitto | 52:c04087025cab | 86 | |
Pokitto | 52:c04087025cab | 87 | /* Send a command packet */ |
Pokitto | 52:c04087025cab | 88 | xmit_spi(cmd); /* Start + Command index */ |
Pokitto | 52:c04087025cab | 89 | xmit_spi((BYTE)(arg >> 24)); /* Argument[31..24] */ |
Pokitto | 52:c04087025cab | 90 | xmit_spi((BYTE)(arg >> 16)); /* Argument[23..16] */ |
Pokitto | 52:c04087025cab | 91 | xmit_spi((BYTE)(arg >> 8)); /* Argument[15..8] */ |
Pokitto | 52:c04087025cab | 92 | xmit_spi((BYTE)arg); /* Argument[7..0] */ |
Pokitto | 52:c04087025cab | 93 | n = 0x01; /* Dummy CRC + Stop */ |
Pokitto | 52:c04087025cab | 94 | if (cmd == CMD0) n = 0x95; /* Valid CRC for CMD0(0) */ |
Pokitto | 52:c04087025cab | 95 | if (cmd == CMD8) n = 0x87; /* Valid CRC for CMD8(0x1AA) */ |
Pokitto | 52:c04087025cab | 96 | xmit_spi(n); |
Pokitto | 52:c04087025cab | 97 | |
Pokitto | 52:c04087025cab | 98 | /* Receive a command response */ |
Pokitto | 52:c04087025cab | 99 | n = 10; /* Wait for a valid response in timeout of 10 attempts */ |
Pokitto | 52:c04087025cab | 100 | do { |
Pokitto | 52:c04087025cab | 101 | res = rcv_spi(); |
Pokitto | 52:c04087025cab | 102 | } while ((res & 0x80) && --n); |
Pokitto | 52:c04087025cab | 103 | |
Pokitto | 52:c04087025cab | 104 | return res; /* Return with the response value */ |
Pokitto | 52:c04087025cab | 105 | } |
Pokitto | 52:c04087025cab | 106 | |
Pokitto | 52:c04087025cab | 107 | |
Pokitto | 52:c04087025cab | 108 | |
Pokitto | 52:c04087025cab | 109 | /*-------------------------------------------------------------------------- |
Pokitto | 52:c04087025cab | 110 | |
Pokitto | 52:c04087025cab | 111 | Public Functions |
Pokitto | 52:c04087025cab | 112 | |
Pokitto | 52:c04087025cab | 113 | ---------------------------------------------------------------------------*/ |
Pokitto | 52:c04087025cab | 114 | |
Pokitto | 52:c04087025cab | 115 | |
Pokitto | 52:c04087025cab | 116 | /*-----------------------------------------------------------------------*/ |
Pokitto | 52:c04087025cab | 117 | /* Initialize Disk Drive */ |
Pokitto | 52:c04087025cab | 118 | /*-----------------------------------------------------------------------*/ |
Pokitto | 52:c04087025cab | 119 | |
Pokitto | 52:c04087025cab | 120 | //__attribute__((section(".SD_Code"))) |
Pokitto | 52:c04087025cab | 121 | DSTATUS disk_initialize (void) { |
Pokitto | 52:c04087025cab | 122 | BYTE n, cmd, ty, ocr[4]; |
Pokitto | 52:c04087025cab | 123 | WORD tmr; |
Pokitto | 52:c04087025cab | 124 | |
Pokitto | 52:c04087025cab | 125 | DESELECT(); |
Pokitto | 52:c04087025cab | 126 | device.frequency(SPI_FREQ); |
Pokitto | 52:c04087025cab | 127 | device.format(8); |
Pokitto | 52:c04087025cab | 128 | // device.frequency(SPI_FREQ); // hangs if this is after format |
Pokitto | 52:c04087025cab | 129 | |
Pokitto | 52:c04087025cab | 130 | #if _WRITE_FUNC |
Pokitto | 52:c04087025cab | 131 | if (MMC_SEL) disk_writep(0, 0); /* Finalize write process if it is in progress */ |
Pokitto | 52:c04087025cab | 132 | #endif |
Pokitto | 52:c04087025cab | 133 | for (n = 100; n; n--) rcv_spi(); /* Dummy clocks */ |
Pokitto | 52:c04087025cab | 134 | |
Pokitto | 52:c04087025cab | 135 | ty = 0; |
Pokitto | 52:c04087025cab | 136 | if (send_cmd(CMD0, 0) == 1) { /* Enter Idle state */ |
Pokitto | 52:c04087025cab | 137 | if (send_cmd(CMD8, 0x1AA) == 1) { /* SDv2 */ |
Pokitto | 52:c04087025cab | 138 | for (n = 0; n < 4; n++) ocr[n] = rcv_spi(); /* Get trailing return value of R7 resp */ |
Pokitto | 52:c04087025cab | 139 | if (ocr[2] == 0x01 && ocr[3] == 0xAA) { /* The card can work at vdd range of 2.7-3.6V */ |
Pokitto | 52:c04087025cab | 140 | for (tmr = 12000; tmr && send_cmd(ACMD41, 1UL << 30); tmr--) ; /* Wait for leaving idle state (ACMD41 with HCS bit) */ |
Pokitto | 52:c04087025cab | 141 | if (tmr && send_cmd(CMD58, 0) == 0) { /* Check CCS bit in the OCR */ |
Pokitto | 52:c04087025cab | 142 | for (n = 0; n < 4; n++) ocr[n] = rcv_spi(); |
Pokitto | 52:c04087025cab | 143 | ty = (ocr[0] & 0x40) ? CT_SD2 | CT_BLOCK : CT_SD2; /* SDv2 (HC or SC) */ |
Pokitto | 52:c04087025cab | 144 | } |
Pokitto | 52:c04087025cab | 145 | } |
Pokitto | 52:c04087025cab | 146 | } else { /* SDv1 or MMCv3 */ |
Pokitto | 52:c04087025cab | 147 | if (send_cmd(ACMD41, 0) <= 1) { |
Pokitto | 52:c04087025cab | 148 | ty = CT_SD1; |
Pokitto | 52:c04087025cab | 149 | cmd = ACMD41; /* SDv1 */ |
Pokitto | 52:c04087025cab | 150 | } else { |
Pokitto | 52:c04087025cab | 151 | ty = CT_MMC; |
Pokitto | 52:c04087025cab | 152 | cmd = CMD1; /* MMCv3 */ |
Pokitto | 52:c04087025cab | 153 | } |
Pokitto | 52:c04087025cab | 154 | for (tmr = 25000; tmr && send_cmd(cmd, 0); tmr--) ; /* Wait for leaving idle state */ |
Pokitto | 52:c04087025cab | 155 | if (!tmr || send_cmd(CMD16, 512) != 0) /* Set R/W block length to 512 */ |
Pokitto | 52:c04087025cab | 156 | ty = 0; |
Pokitto | 52:c04087025cab | 157 | } |
Pokitto | 52:c04087025cab | 158 | } |
Pokitto | 52:c04087025cab | 159 | CardType = ty; |
Pokitto | 52:c04087025cab | 160 | release_spi(); |
Pokitto | 52:c04087025cab | 161 | |
Pokitto | 52:c04087025cab | 162 | return ty ? 0 : STA_NOINIT; |
Pokitto | 52:c04087025cab | 163 | } |
Pokitto | 52:c04087025cab | 164 | |
Pokitto | 52:c04087025cab | 165 | |
Pokitto | 52:c04087025cab | 166 | |
Pokitto | 52:c04087025cab | 167 | /*-----------------------------------------------------------------------*/ |
Pokitto | 52:c04087025cab | 168 | /* Read partial sector */ |
Pokitto | 52:c04087025cab | 169 | /*-----------------------------------------------------------------------*/ |
Pokitto | 52:c04087025cab | 170 | |
Pokitto | 52:c04087025cab | 171 | DRESULT disk_readp ( |
Pokitto | 52:c04087025cab | 172 | BYTE *buff, /* Pointer to the read buffer (NULL:Read bytes are forwarded to the stream) */ |
Pokitto | 52:c04087025cab | 173 | DWORD lba, /* Sector number (LBA) */ |
Pokitto | 52:c04087025cab | 174 | WORD ofs, /* Byte offset to read from (0..511) */ |
Pokitto | 52:c04087025cab | 175 | WORD cnt /* Number of bytes to read (ofs + cnt mus be <= 512) */ |
Pokitto | 52:c04087025cab | 176 | ) { |
Pokitto | 52:c04087025cab | 177 | DRESULT res; |
Pokitto | 52:c04087025cab | 178 | BYTE rc; |
Pokitto | 52:c04087025cab | 179 | WORD bc; |
Pokitto | 52:c04087025cab | 180 | |
Pokitto | 52:c04087025cab | 181 | |
Pokitto | 52:c04087025cab | 182 | if (!(CardType & CT_BLOCK)) lba *= 512; /* Convert to byte address if needed */ |
Pokitto | 52:c04087025cab | 183 | |
Pokitto | 52:c04087025cab | 184 | res = RES_ERROR; |
Pokitto | 52:c04087025cab | 185 | if (send_cmd(CMD17, lba) == 0) { /* READ_SINGLE_BLOCK */ |
Pokitto | 52:c04087025cab | 186 | |
Pokitto | 52:c04087025cab | 187 | bc = 30000; |
Pokitto | 52:c04087025cab | 188 | do { /* Wait for data packet in timeout of 100ms */ |
Pokitto | 52:c04087025cab | 189 | rc = rcv_spi(); |
Pokitto | 52:c04087025cab | 190 | } while (rc == 0xFF && --bc); |
Pokitto | 52:c04087025cab | 191 | |
Pokitto | 52:c04087025cab | 192 | if (rc == 0xFE) { /* A data packet arrived */ |
Pokitto | 52:c04087025cab | 193 | bc = 514 - ofs - cnt; |
Pokitto | 52:c04087025cab | 194 | |
Pokitto | 52:c04087025cab | 195 | /* Skip leading bytes */ |
Pokitto | 52:c04087025cab | 196 | if (ofs) { |
Pokitto | 52:c04087025cab | 197 | do { |
Pokitto | 52:c04087025cab | 198 | rcv_spi(); |
Pokitto | 52:c04087025cab | 199 | } while (--ofs); |
Pokitto | 52:c04087025cab | 200 | } |
Pokitto | 52:c04087025cab | 201 | |
Pokitto | 52:c04087025cab | 202 | /* Receive a part of the sector */ |
Pokitto | 52:c04087025cab | 203 | if (buff) { /* Store data to the memory */ |
Pokitto | 52:c04087025cab | 204 | do { |
Pokitto | 52:c04087025cab | 205 | *buff++ = rcv_spi(); |
Pokitto | 52:c04087025cab | 206 | } while (--cnt); |
Pokitto | 52:c04087025cab | 207 | } else { /* Forward data to the outgoing stream (depends on the project) */ |
Pokitto | 52:c04087025cab | 208 | do { |
Pokitto | 52:c04087025cab | 209 | rcv_spi(); |
Pokitto | 52:c04087025cab | 210 | } while (--cnt); |
Pokitto | 52:c04087025cab | 211 | } |
Pokitto | 52:c04087025cab | 212 | |
Pokitto | 52:c04087025cab | 213 | /* Skip trailing bytes and CRC */ |
Pokitto | 52:c04087025cab | 214 | do rcv_spi(); |
Pokitto | 52:c04087025cab | 215 | while (--bc); |
Pokitto | 52:c04087025cab | 216 | |
Pokitto | 52:c04087025cab | 217 | res = RES_OK; |
Pokitto | 52:c04087025cab | 218 | } |
Pokitto | 52:c04087025cab | 219 | } |
Pokitto | 52:c04087025cab | 220 | |
Pokitto | 52:c04087025cab | 221 | release_spi(); |
Pokitto | 52:c04087025cab | 222 | |
Pokitto | 52:c04087025cab | 223 | return res; |
Pokitto | 52:c04087025cab | 224 | } |
Pokitto | 52:c04087025cab | 225 | |
Pokitto | 52:c04087025cab | 226 | |
Pokitto | 52:c04087025cab | 227 | |
Pokitto | 52:c04087025cab | 228 | /*-----------------------------------------------------------------------*/ |
Pokitto | 52:c04087025cab | 229 | /* Write partial sector */ |
Pokitto | 52:c04087025cab | 230 | /*-----------------------------------------------------------------------*/ |
Pokitto | 52:c04087025cab | 231 | #if _WRITE_FUNC |
Pokitto | 52:c04087025cab | 232 | |
Pokitto | 52:c04087025cab | 233 | DRESULT disk_writep ( |
Pokitto | 52:c04087025cab | 234 | const BYTE *buff, /* Pointer to the bytes to be written (NULL:Initiate/Finalize sector write) */ |
Pokitto | 52:c04087025cab | 235 | DWORD sa /* Number of bytes to send, Sector number (LBA) or zero */ |
Pokitto | 52:c04087025cab | 236 | ) { |
Pokitto | 52:c04087025cab | 237 | DRESULT res; |
Pokitto | 52:c04087025cab | 238 | WORD bc; |
Pokitto | 52:c04087025cab | 239 | static WORD wc; |
Pokitto | 52:c04087025cab | 240 | |
Pokitto | 52:c04087025cab | 241 | |
Pokitto | 52:c04087025cab | 242 | res = RES_ERROR; |
Pokitto | 52:c04087025cab | 243 | |
Pokitto | 52:c04087025cab | 244 | if (buff) { /* Send data bytes */ |
Pokitto | 52:c04087025cab | 245 | bc = (WORD)sa; |
Pokitto | 52:c04087025cab | 246 | while (bc && wc) { /* Send data bytes to the card */ |
Pokitto | 52:c04087025cab | 247 | xmit_spi(*buff++); |
Pokitto | 52:c04087025cab | 248 | wc--; |
Pokitto | 52:c04087025cab | 249 | bc--; |
Pokitto | 52:c04087025cab | 250 | } |
Pokitto | 52:c04087025cab | 251 | res = RES_OK; |
Pokitto | 52:c04087025cab | 252 | } else { |
Pokitto | 52:c04087025cab | 253 | if (sa) { /* Initiate sector write process */ |
Pokitto | 52:c04087025cab | 254 | if (!(CardType & CT_BLOCK)) sa *= 512; /* Convert to byte address if needed */ |
Pokitto | 52:c04087025cab | 255 | if (send_cmd(CMD24, sa) == 0) { /* WRITE_SINGLE_BLOCK */ |
Pokitto | 52:c04087025cab | 256 | xmit_spi(0xFF); |
Pokitto | 52:c04087025cab | 257 | xmit_spi(0xFE); /* Data block header */ |
Pokitto | 52:c04087025cab | 258 | wc = 512; /* Set byte counter */ |
Pokitto | 52:c04087025cab | 259 | res = RES_OK; |
Pokitto | 52:c04087025cab | 260 | } |
Pokitto | 52:c04087025cab | 261 | } else { /* Finalize sector write process */ |
Pokitto | 52:c04087025cab | 262 | bc = wc + 2; |
Pokitto | 52:c04087025cab | 263 | while (bc--) xmit_spi(0); /* Fill left bytes and CRC with zeros */ |
Pokitto | 52:c04087025cab | 264 | if ((rcv_spi() & 0x1F) == 0x05) { /* Receive data resp and wait for end of write process in timeout of 300ms */ |
Pokitto | 52:c04087025cab | 265 | for (bc = 65000; rcv_spi() != 0xFF && bc; bc--) ; /* Wait ready */ |
Pokitto | 52:c04087025cab | 266 | if (bc) res = RES_OK; |
Pokitto | 52:c04087025cab | 267 | } |
Pokitto | 52:c04087025cab | 268 | release_spi(); |
Pokitto | 52:c04087025cab | 269 | } |
Pokitto | 52:c04087025cab | 270 | } |
Pokitto | 52:c04087025cab | 271 | |
Pokitto | 52:c04087025cab | 272 | return res; |
Pokitto | 52:c04087025cab | 273 | } |
Pokitto | 52:c04087025cab | 274 | #endif |
Pokitto | 52:c04087025cab | 275 | |
Pokitto | 52:c04087025cab | 276 | } // namespace PFFS |
Pokitto | 52:c04087025cab | 277 | |
Pokitto | 52:c04087025cab | 278 |