Hi,
I am trying to connect microSD card (transcend 2GB) to MSP430F67791 controller via SPI interface (USCI_B1).
I am using petit Fatfs library (latest R0.03) for this. (elm-chan.org/.../00index_p.html)
In main(), I am calling the petit-FatFs functions in this order:
fileStatus = pf_mount(&fs); // FRESULT fileStatus;
fileStatus = pf_open(fileName); // const char fileName[15] = "test.txt";
// I even tried pf_open("test.txt")
// #define _USE_LCC 1 /* Allow lower case characters for path name */
fileStatus = pf_write("Hello world!\r\n", 14, &bytesWritten);
fileStatus = pf_write(0, 0, &bytesWritten);
pf_mount() returns FR_OK but pf_open() is returning FR_NO_FILE, and this is the problem I'm facing.
I made sure that the file exists and it exists in the root directory.
From my computer, I formatted the card as FAT32 and created test.txt on it. I even tried writing a character in it from my computer so that the file size is non-zero.
The FR_NO_FILE status is returned by dir_find():
pf_open() -> follow_path() -> dir_find()
I had to write only 4 low-level SPI functions for the petit FatFs library to work on my MSP430.
void init_spi (void)
{
P4DIR |= BIT5 | BIT6; // MOSI, CLK as o/p
P4DIR &= ~BIT4; // MISO as i/p
P4SEL0 |= BIT4 | BIT5 |BIT6; // SPI
UCB1CTLW0 |= UCSWRST; // reset state
UCB1CTLW0 |= UCMST | UCSYNC | UCCKPL | UCMSB; // 3-pin, 8-bit SPI master
// Clock polarity high, MSB
UCB1CTLW0 |= UCSSEL_2; // SMCLK
UCB1BRW = 84; // SMCLK/84 = 200kHz
UCB1CTLW0 &= ~UCSWRST; // SPI on
}
void xmit_spi (BYTE d)
{
while (!(UCB1IFG & UCTXIFG)) ; // USCI_B1 TX buffer ready?
UCB1TXBUF = d; // Transmit character
}
BYTE rcv_spi (void)
{
char recd_byte;
rcv_spi_count++;
xmit_spi(0xFF);
while (!(UCB1IFG & UCRXIFG)); //USCI_B1 RX buffer filled ?
recd_byte = UCB1RXBUF;
return recd_byte;
}
void dly_100us (void)
{
// MCLK= 16 MHz, 1 NOP = 0.06us, if microSec=1 then delay= (0.06*16) * 1 = 0.96us (approx 1 us)
unsigned int microSec= 100;
unsigned long int i;
for ( i= 16*microSec ; i > 0 ; i--)
{
_NOP();
}
}
#define SELECT() P4OUT &= ~BIT3 // CS = L. P4.3 is configured as o/p
#define DESELECT() P4OUT |= BIT3 // CS = H
Can anyone help to let me know if I'm missing something or if the microSD card & SPI specs that I'm working with are ok ?
Thanks
Attached files: (1) pff.c, (2) pff.h , (3) msp_mmcp.c (contains diskio and SPI functions), (4) msp_mmcp.h
/*----------------------------------------------------------------------------/ / Petit FatFs - FAT file system module R0.03 (C)ChaN, 2014 /-----------------------------------------------------------------------------/ / Petit FatFs module is a generic FAT file system module for small embedded / systems. This is a free software that opened for education, research and / commercial developments under license policy of following trems. / / Copyright (C) 2014, ChaN, all right reserved. / / * The Petit FatFs module is a free software and there is NO WARRANTY. / * No restriction on use. You can use, modify and redistribute it for / personal, non-profit or commercial products UNDER YOUR RESPONSIBILITY. / * Redistributions of source code must retain the above copyright notice. / /-----------------------------------------------------------------------------/ / Jun 15,'09 R0.01a First release. / / Dec 14,'09 R0.02 Added multiple code page support. / Added write funciton. / Changed stream read mode interface. / Dec 07,'10 R0.02a Added some configuration options. / Fixed fails to open objects with DBCS character. / Jun 10,'14 R0.03 Separated out configuration options to pffconf.h. / Added _USE_LCC option. / Added _FS_FAT16 option. /----------------------------------------------------------------------------*/ #include "pff.h" /* Petit FatFs configurations and declarations */ #include "diskio.h" /* Declarations of low level disk I/O functions */ /*-------------------------------------------------------------------------- Module Private Definitions ---------------------------------------------------------------------------*/ #if _PFATFS != 4004 /* Revision ID */ #error Wrong include file (pff.h). #endif #if _FS_FAT32 #if !_FS_FAT16 && !_FS_FAT12 #define _FS_32ONLY 1 #else #define _FS_32ONLY 0 #endif #else #if !_FS_FAT16 && !_FS_FAT12 #error Wrong _FS_FATxx setting. #endif #define _FS_32ONLY 0 #endif #define ABORT(err) {fs->flag = 0; return err;} /*--------------------------------------------------------*/ /* DBCS code ranges and SBCS extend char conversion table */ /*--------------------------------------------------------*/ #if _CODE_PAGE == 932 /* Japanese Shift-JIS */ #define _DF1S 0x81 /* DBC 1st byte range 1 start */ #define _DF1E 0x9F /* DBC 1st byte range 1 end */ #define _DF2S 0xE0 /* DBC 1st byte range 2 start */ #define _DF2E 0xFC /* DBC 1st byte range 2 end */ #define _DS1S 0x40 /* DBC 2nd byte range 1 start */ #define _DS1E 0x7E /* DBC 2nd byte range 1 end */ #define _DS2S 0x80 /* DBC 2nd byte range 2 start */ #define _DS2E 0xFC /* DBC 2nd byte range 2 end */ #elif _CODE_PAGE == 936 /* Simplified Chinese GBK */ #define _DF1S 0x81 #define _DF1E 0xFE #define _DS1S 0x40 #define _DS1E 0x7E #define _DS2S 0x80 #define _DS2E 0xFE #elif _CODE_PAGE == 949 /* Korean */ #define _DF1S 0x81 #define _DF1E 0xFE #define _DS1S 0x41 #define _DS1E 0x5A #define _DS2S 0x61 #define _DS2E 0x7A #define _DS3S 0x81 #define _DS3E 0xFE #elif _CODE_PAGE == 950 /* Traditional Chinese Big5 */ #define _DF1S 0x81 #define _DF1E 0xFE #define _DS1S 0x40 #define _DS1E 0x7E #define _DS2S 0xA1 #define _DS2E 0xFE #elif _CODE_PAGE == 437 /* U.S. (OEM) */ #define _EXCVT {0x80,0x9A,0x90,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F,0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0x21,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} #elif _CODE_PAGE == 720 /* Arabic (OEM) */ #define _EXCVT {0x80,0x81,0x45,0x41,0x84,0x41,0x86,0x43,0x45,0x45,0x45,0x49,0x49,0x8D,0x8E,0x8F,0x90,0x92,0x92,0x93,0x94,0x95,0x49,0x49,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} #elif _CODE_PAGE == 737 /* Greek (OEM) */ #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x92,0x92,0x93,0x94,0x95,0x96,0x97,0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87, \ 0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0xAA,0x92,0x93,0x94,0x95,0x96,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 0x97,0xEA,0xEB,0xEC,0xE4,0xED,0xEE,0xE7,0xE8,0xF1,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} #elif _CODE_PAGE == 775 /* Baltic (OEM) */ #define _EXCVT {0x80,0x9A,0x91,0xA0,0x8E,0x95,0x8F,0x80,0xAD,0xED,0x8A,0x8A,0xA1,0x8D,0x8E,0x8F,0x90,0x92,0x92,0xE2,0x99,0x95,0x96,0x97,0x97,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \ 0xA0,0xA1,0xE0,0xA3,0xA3,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xB5,0xB6,0xB7,0xB8,0xBD,0xBE,0xC6,0xC7,0xA5,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE3,0xE8,0xE8,0xEA,0xEA,0xEE,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} #elif _CODE_PAGE == 850 /* Multilingual Latin 1 (OEM) */ #define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xB7,0x8F,0x80,0xD2,0xD3,0xD4,0xD8,0xD7,0xDE,0x8E,0x8F,0x90,0x92,0x92,0xE2,0x99,0xE3,0xEA,0xEB,0x59,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \ 0xB5,0xD6,0xE0,0xE9,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0x21,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE7,0xE7,0xE9,0xEA,0xEB,0xED,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} #elif _CODE_PAGE == 852 /* Latin 2 (OEM) */ #define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xDE,0x8F,0x80,0x9D,0xD3,0x8A,0x8A,0xD7,0x8D,0x8E,0x8F,0x90,0x91,0x91,0xE2,0x99,0x95,0x95,0x97,0x97,0x99,0x9A,0x9B,0x9B,0x9D,0x9E,0x9F, \ 0xB5,0xD6,0xE0,0xE9,0xA4,0xA4,0xA6,0xA6,0xA8,0xA8,0xAA,0x8D,0xAC,0xB8,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBD,0xBF, \ 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC6,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD1,0xD1,0xD2,0xD3,0xD2,0xD5,0xD6,0xD7,0xB7,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 0xE0,0xE1,0xE2,0xE3,0xE3,0xD5,0xE6,0xE6,0xE8,0xE9,0xE8,0xEB,0xED,0xED,0xDD,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xEB,0xFC,0xFC,0xFE,0xFF} #elif _CODE_PAGE == 855 /* Cyrillic (OEM) */ #define _EXCVT {0x81,0x81,0x83,0x83,0x85,0x85,0x87,0x87,0x89,0x89,0x8B,0x8B,0x8D,0x8D,0x8F,0x8F,0x91,0x91,0x93,0x93,0x95,0x95,0x97,0x97,0x99,0x99,0x9B,0x9B,0x9D,0x9D,0x9F,0x9F, \ 0xA1,0xA1,0xA3,0xA3,0xA5,0xA5,0xA7,0xA7,0xA9,0xA9,0xAB,0xAB,0xAD,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB6,0xB6,0xB8,0xB8,0xB9,0xBA,0xBB,0xBC,0xBE,0xBE,0xBF, \ 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD1,0xD1,0xD3,0xD3,0xD5,0xD5,0xD7,0xD7,0xDD,0xD9,0xDA,0xDB,0xDC,0xDD,0xE0,0xDF, \ 0xE0,0xE2,0xE2,0xE4,0xE4,0xE6,0xE6,0xE8,0xE8,0xEA,0xEA,0xEC,0xEC,0xEE,0xEE,0xEF,0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF8,0xFA,0xFA,0xFC,0xFC,0xFD,0xFE,0xFF} #elif _CODE_PAGE == 857 /* Turkish (OEM) */ #define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xB7,0x8F,0x80,0xD2,0xD3,0xD4,0xD8,0xD7,0x98,0x8E,0x8F,0x90,0x92,0x92,0xE2,0x99,0xE3,0xEA,0xEB,0x98,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9E, \ 0xB5,0xD6,0xE0,0xE9,0xA5,0xA5,0xA6,0xA6,0xA8,0xA9,0xAA,0xAB,0xAC,0x21,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xDE,0x59,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} #elif _CODE_PAGE == 858 /* Multilingual Latin 1 + Euro (OEM) */ #define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xB7,0x8F,0x80,0xD2,0xD3,0xD4,0xD8,0xD7,0xDE,0x8E,0x8F,0x90,0x92,0x92,0xE2,0x99,0xE3,0xEA,0xEB,0x59,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \ 0xB5,0xD6,0xE0,0xE9,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0x21,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD1,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE7,0xE7,0xE9,0xEA,0xEB,0xED,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} #elif _CODE_PAGE == 862 /* Hebrew (OEM) */ #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0x21,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} #elif _CODE_PAGE == 866 /* Russian (OEM) */ #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 0x90,0x91,0x92,0x93,0x9d,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F,0xF0,0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} #elif _CODE_PAGE == 874 /* Thai (OEM, Windows) */ #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} #elif _CODE_PAGE == 1250 /* Central Europe (Windows) */ #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x8A,0x9B,0x8C,0x8D,0x8E,0x8F, \ 0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xA3,0xB4,0xB5,0xB6,0xB7,0xB8,0xA5,0xAA,0xBB,0xBC,0xBD,0xBC,0xAF, \ 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xF7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xFF} #elif _CODE_PAGE == 1251 /* Cyrillic (Windows) */ #define _EXCVT {0x80,0x81,0x82,0x82,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x80,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x8A,0x9B,0x8C,0x8D,0x8E,0x8F, \ 0xA0,0xA2,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB2,0xA5,0xB5,0xB6,0xB7,0xA8,0xB9,0xAA,0xBB,0xA3,0xBD,0xBD,0xAF, \ 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF} #elif _CODE_PAGE == 1252 /* Latin 1 (Windows) */ #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0xAd,0x9B,0x8C,0x9D,0xAE,0x9F, \ 0xA0,0x21,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xF7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0x9F} #elif _CODE_PAGE == 1253 /* Greek (Windows) */ #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xA2,0xB8,0xB9,0xBA, \ 0xE0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xF2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xFB,0xBC,0xFD,0xBF,0xFF} #elif _CODE_PAGE == 1254 /* Turkish (Windows) */ #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x8A,0x9B,0x8C,0x9D,0x9E,0x9F, \ 0xA0,0x21,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xF7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0x9F} #elif _CODE_PAGE == 1255 /* Hebrew (Windows) */ #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 0xA0,0x21,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} #elif _CODE_PAGE == 1256 /* Arabic (Windows) */ #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x8C,0x9D,0x9E,0x9F, \ 0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 0x41,0xE1,0x41,0xE3,0xE4,0xE5,0xE6,0x43,0x45,0x45,0x45,0x45,0xEC,0xED,0x49,0x49,0xF0,0xF1,0xF2,0xF3,0x4F,0xF5,0xF6,0xF7,0xF8,0x55,0xFA,0x55,0x55,0xFD,0xFE,0xFF} #elif _CODE_PAGE == 1257 /* Baltic (Windows) */ #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xA8,0xB9,0xAA,0xBB,0xBC,0xBD,0xBE,0xAF, \ 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xF7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xFF} #elif _CODE_PAGE == 1258 /* Vietnam (OEM, Windows) */ #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0xAC,0x9D,0x9E,0x9F, \ 0xA0,0x21,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xEC,0xCD,0xCE,0xCF,0xD0,0xD1,0xF2,0xD3,0xD4,0xD5,0xD6,0xF7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xFE,0x9F} #else #error Unknown code page. #endif /* Character code support macros */ #define IsUpper(c) (((c)>='A')&&((c)<='Z')) #define IsLower(c) (((c)>='a')&&((c)<='z')) #ifndef _EXCVT /* DBCS configuration */ #ifdef _DF2S /* Two 1st byte areas */ #define IsDBCS1(c) (((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E) || ((BYTE)(c) >= _DF2S && (BYTE)(c) <= _DF2E)) #else /* One 1st byte area */ #define IsDBCS1(c) ((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E) #endif #ifdef _DS3S /* Three 2nd byte areas */ #define IsDBCS2(c) (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E) || ((BYTE)(c) >= _DS3S && (BYTE)(c) <= _DS3E)) #else /* Two 2nd byte areas */ #define IsDBCS2(c) (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E)) #endif #else /* SBCS configuration */ #define IsDBCS1(c) 0 #define IsDBCS2(c) 0 #endif /* _EXCVT */ /* FatFs refers the members in the FAT structures with byte offset instead / of structure member because there are incompatibility of the packing option / between various compilers. */ #define BS_jmpBoot 0 #define BS_OEMName 3 #define BPB_BytsPerSec 11 #define BPB_SecPerClus 13 #define BPB_RsvdSecCnt 14 #define BPB_NumFATs 16 #define BPB_RootEntCnt 17 #define BPB_TotSec16 19 #define BPB_Media 21 #define BPB_FATSz16 22 #define BPB_SecPerTrk 24 #define BPB_NumHeads 26 #define BPB_HiddSec 28 #define BPB_TotSec32 32 #define BS_55AA 510 #define BS_DrvNum 36 #define BS_BootSig 38 #define BS_VolID 39 #define BS_VolLab 43 #define BS_FilSysType 54 #define BPB_FATSz32 36 #define BPB_ExtFlags 40 #define BPB_FSVer 42 #define BPB_RootClus 44 #define BPB_FSInfo 48 #define BPB_BkBootSec 50 #define BS_DrvNum32 64 #define BS_BootSig32 66 #define BS_VolID32 67 #define BS_VolLab32 71 #define BS_FilSysType32 82 #define MBR_Table 446 #define DIR_Name 0 #define DIR_Attr 11 #define DIR_NTres 12 #define DIR_CrtTime 14 #define DIR_CrtDate 16 #define DIR_FstClusHI 20 #define DIR_WrtTime 22 #define DIR_WrtDate 24 #define DIR_FstClusLO 26 #define DIR_FileSize 28 /*-------------------------------------------------------------------------- Private Functions ---------------------------------------------------------------------------*/ static FATFS *FatFs; /* Pointer to the file system object (logical drive) */ /* Fill memory */ static void mem_set (void* dst, int val, int cnt) { char *d = (char*)dst; while (cnt--) *d++ = (char)val; } /* Compare memory to memory */ static int mem_cmp (const void* dst, const void* src, int cnt) { const char *d = (const char *)dst, *s = (const char *)src; int r = 0; while (cnt-- && (r = *d++ - *s++) == 0) ; return r; } /*-----------------------------------------------------------------------*/ /* FAT access - Read value of a FAT entry */ /*-----------------------------------------------------------------------*/ static CLUST get_fat ( /* 1:IO error, Else:Cluster status */ CLUST clst /* Cluster# to get the link information */ ) { BYTE buf[4]; FATFS *fs = FatFs; if (clst < 2 || clst >= fs->n_fatent) /* Range check */ return 1; switch (fs->fs_type) { #if _FS_FAT12 case FS_FAT12 : { UINT wc, bc, ofs; bc = (UINT)clst; bc += bc / 2; ofs = bc % 512; bc /= 512; if (ofs != 511) { if (disk_readp(buf, fs->fatbase + bc, ofs, 2)) break; } else { if (disk_readp(buf, fs->fatbase + bc, 511, 1)) break; if (disk_readp(buf+1, fs->fatbase + bc + 1, 0, 1)) break; } wc = LD_WORD(buf); return (clst & 1) ? (wc >> 4) : (wc & 0xFFF); } #endif #if _FS_FAT16 case FS_FAT16 : if (disk_readp(buf, fs->fatbase + clst / 256, ((UINT)clst % 256) * 2, 2)) break; return LD_WORD(buf); #endif #if _FS_FAT32 case FS_FAT32 : if (disk_readp(buf, fs->fatbase + clst / 128, ((UINT)clst % 128) * 4, 4)) break; return LD_DWORD(buf) & 0x0FFFFFFF; #endif } return 1; /* An error occured at the disk I/O layer */ } /*-----------------------------------------------------------------------*/ /* Get sector# from cluster# / Get cluster field from directory entry */ /*-----------------------------------------------------------------------*/ static DWORD clust2sect ( /* !=0: Sector number, 0: Failed - invalid cluster# */ CLUST clst /* Cluster# to be converted */ ) { FATFS *fs = FatFs; clst -= 2; if (clst >= (fs->n_fatent - 2)) return 0; /* Invalid cluster# */ return (DWORD)clst * fs->csize + fs->database; } static CLUST get_clust ( BYTE* dir /* Pointer to directory entry */ ) { FATFS *fs = FatFs; CLUST clst = 0; if (_FS_32ONLY || (_FS_FAT32 && fs->fs_type == FS_FAT32)) { clst = LD_WORD(dir+DIR_FstClusHI); clst <<= 16; } clst |= LD_WORD(dir+DIR_FstClusLO); return clst; } /*-----------------------------------------------------------------------*/ /* Directory handling - Rewind directory index */ /*-----------------------------------------------------------------------*/ static FRESULT dir_rewind ( DIR *dj /* Pointer to directory object */ ) { CLUST clst; FATFS *fs = FatFs; dj->index = 0; clst = dj->sclust; if (clst == 1 || clst >= fs->n_fatent) /* Check start cluster range */ return FR_DISK_ERR; if (_FS_FAT32 && !clst && (_FS_32ONLY || fs->fs_type == FS_FAT32)) /* Replace cluster# 0 with root cluster# if in FAT32 */ clst = (CLUST)fs->dirbase; dj->clust = clst; /* Current cluster */ dj->sect = (_FS_32ONLY || clst) ? clust2sect(clst) : fs->dirbase; /* Current sector */ return FR_OK; /* Seek succeeded */ } /*-----------------------------------------------------------------------*/ /* Directory handling - Move directory index next */ /*-----------------------------------------------------------------------*/ static FRESULT dir_next ( /* FR_OK:Succeeded, FR_NO_FILE:End of table */ DIR *dj /* Pointer to directory object */ ) { CLUST clst; WORD i; FATFS *fs = FatFs; i = dj->index + 1; if (!i || !dj->sect) /* Report EOT when index has reached 65535 */ return FR_NO_FILE; if (!(i % 16)) { /* Sector changed? */ dj->sect++; /* Next sector */ if (dj->clust == 0) { /* Static table */ if (i >= fs->n_rootdir) /* Report EOT when end of table */ return FR_NO_FILE; } else { /* Dynamic table */ if (((i / 16) & (fs->csize - 1)) == 0) { /* Cluster changed? */ clst = get_fat(dj->clust); /* Get next cluster */ if (clst <= 1) return FR_DISK_ERR; if (clst >= fs->n_fatent) /* When it reached end of dynamic table */ return FR_NO_FILE; /* Report EOT */ dj->clust = clst; /* Initialize data for new cluster */ dj->sect = clust2sect(clst); } } } dj->index = i; return FR_OK; } /*-----------------------------------------------------------------------*/ /* Directory handling - Find an object in the directory */ /*-----------------------------------------------------------------------*/ static FRESULT dir_find ( DIR *dj, /* Pointer to the directory object linked to the file name */ BYTE *dir /* 32-byte working buffer */ ) { FRESULT res, res1, res2,res3; BYTE c; unsigned int do_count = 0; res = dir_rewind(dj); /* Rewind directory object */ if (res != FR_OK) return res; do { res = disk_readp(dir, dj->sect, (dj->index % 16) * 32, 32) /* Read an entry */ ? FR_DISK_ERR : FR_OK; if (res != FR_OK) { res1 = res; ////// debugging break; } c = dir[DIR_Name]; /* First character */ if (c == 0) { res = FR_NO_FILE; res2=res; ////// debugging break; } /* Reached to end of table */ if (!(dir[DIR_Attr] & AM_VOL) && !mem_cmp(dir, dj->fn, 11)) /* Is it a valid entry? */ break; res = dir_next(dj); /* Next entry */ res3 = res; ////// debugging do_count++; ///// debugging } while (res == FR_OK); return res; /// commented for debugging ///return FR_OK; } /*-----------------------------------------------------------------------*/ /* Read an object from the directory */ /*-----------------------------------------------------------------------*/ #if _USE_DIR static FRESULT dir_read ( DIR *dj, /* Pointer to the directory object to store read object name */ BYTE *dir /* 32-byte working buffer */ ) { FRESULT res; BYTE a, c; res = FR_NO_FILE; while (dj->sect) { res = disk_readp(dir, dj->sect, (dj->index % 16) * 32, 32) /* Read an entry */ ? FR_DISK_ERR : FR_OK; if (res != FR_OK) break; c = dir[DIR_Name]; if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */ a = dir[DIR_Attr] & AM_MASK; if (c != 0xE5 && c != '.' && !(a & AM_VOL)) /* Is it a valid entry? */ break; res = dir_next(dj); /* Next entry */ if (res != FR_OK) break; } if (res != FR_OK) dj->sect = 0; return res; } #endif /*-----------------------------------------------------------------------*/ /* Pick a segment and create the object name in directory form */ /*-----------------------------------------------------------------------*/ static FRESULT create_name ( DIR *dj, /* Pointer to the directory object */ const char **path /* Pointer to pointer to the segment in the path string */ ) { BYTE c, ni, si, i, *sfn; const char *p; #if _USE_LCC #ifdef _EXCVT static const BYTE cvt[] = _EXCVT; #endif #endif /* Create file name in directory form */ sfn = dj->fn; mem_set(sfn, ' ', 11); si = i = 0; ni = 8; p = *path; for (;;) { c = p[si++]; if (c <= ' ' || c == '/') break; /* Break on end of segment */ if (c == '.' || i >= ni) { if (ni != 8 || c != '.') break; i = 8; ni = 11; continue; } #if _USE_LCC #ifdef _EXCVT if (c >= 0x80) /* To upper extended char (SBCS) */ c = cvt[c - 0x80]; #endif if (IsDBCS1(c) && i < ni - 1) { /* DBC 1st byte? */ BYTE d = p[si++]; /* Get 2nd byte */ sfn[i++] = c; sfn[i++] = d; } else #endif { /* Single byte code */ if (_USE_LCC && IsLower(c)) c -= 0x20; /* toupper */ sfn[i++] = c; } } *path = &p[si]; /* Rerurn pointer to the next segment */ sfn[11] = (c <= ' ') ? 1 : 0; /* Set last segment flag if end of path */ return FR_OK; } /*-----------------------------------------------------------------------*/ /* Get file information from directory entry */ /*-----------------------------------------------------------------------*/ #if _USE_DIR static void get_fileinfo ( /* No return code */ DIR *dj, /* Pointer to the directory object */ BYTE *dir, /* 32-byte working buffer */ FILINFO *fno /* Pointer to store the file information */ ) { BYTE i, c; char *p; p = fno->fname; if (dj->sect) { for (i = 0; i < 8; i++) { /* Copy file name body */ c = dir[i]; if (c == ' ') break; if (c == 0x05) c = 0xE5; *p++ = c; } if (dir[8] != ' ') { /* Copy file name extension */ *p++ = '.'; for (i = 8; i < 11; i++) { c = dir[i]; if (c == ' ') break; *p++ = c; } } fno->fattrib = dir[DIR_Attr]; /* Attribute */ fno->fsize = LD_DWORD(dir+DIR_FileSize); /* Size */ fno->fdate = LD_WORD(dir+DIR_WrtDate); /* Date */ fno->ftime = LD_WORD(dir+DIR_WrtTime); /* Time */ } *p = 0; } #endif /* _USE_DIR */ /*-----------------------------------------------------------------------*/ /* Follow a file path */ /*-----------------------------------------------------------------------*/ static FRESULT follow_path ( /* FR_OK(0): successful, !=0: error code */ DIR *dj, /* Directory object to return last directory and found object */ BYTE *dir, /* 32-byte working buffer */ const char *path /* Full-path string to find a file or directory */ ) { FRESULT res; while (*path == ' ') path++; /* Strip leading spaces */ if (*path == '/') path++; /* Strip heading separator if exist */ dj->sclust = 0; /* Set start directory (always root dir) */ if ((BYTE)*path < ' ') { /* Null path means the root directory */ res = dir_rewind(dj); dir[0] = 0; } else { /* Follow path */ for (;;) { res = create_name(dj, &path); /* Get a segment */ if (res != FR_OK) break; res = dir_find(dj, dir); /* Find it */ if (res != FR_OK) break; /* Could not find the object */ if (dj->fn[11]) break; /* Last segment match. Function completed. */ if (!(dir[DIR_Attr] & AM_DIR)) { /* Cannot follow path because it is a file */ res = FR_NO_FILE; break; } dj->sclust = get_clust(dir); /* Follow next */ } } return res; } /*-----------------------------------------------------------------------*/ /* Check a sector if it is an FAT boot record */ /*-----------------------------------------------------------------------*/ static BYTE check_fs ( /* 0:The FAT boot record, 1:Valid boot record but not an FAT, 2:Not a boot record, 3:Error */ BYTE *buf, /* Working buffer */ DWORD sect /* Sector# (lba) to check if it is an FAT boot record or not */ ) { if (disk_readp(buf, sect, 510, 2)) /* Read the boot record */ return 3; if (LD_WORD(buf) != 0xAA55) /* Check record signature */ return 2; if (!_FS_32ONLY && !disk_readp(buf, sect, BS_FilSysType, 2) && LD_WORD(buf) == 0x4146) /* Check FAT12/16 */ return 0; if (_FS_FAT32 && !disk_readp(buf, sect, BS_FilSysType32, 2) && LD_WORD(buf) == 0x4146) /* Check FAT32 */ return 0; return 1; } /*-------------------------------------------------------------------------- Public Functions --------------------------------------------------------------------------*/ /*-----------------------------------------------------------------------*/ /* Mount/Unmount a Locical Drive */ /*-----------------------------------------------------------------------*/ FRESULT pf_mount ( FATFS *fs /* Pointer to new file system object */ ) { BYTE fmt, buf[36]; DWORD bsect, fsize, tsect, mclst; FatFs = 0; if (disk_initialize() & STA_NOINIT) /* Check if the drive is ready or not */ return FR_NOT_READY; /* Search FAT partition on the drive */ bsect = 0; fmt = check_fs(buf, bsect); /* Check sector 0 as an SFD format */ if (fmt == 1) { /* Not an FAT boot record, it may be FDISK format */ /* Check a partition listed in top of the partition table */ if (disk_readp(buf, bsect, MBR_Table, 16)) { /* 1st partition entry */ fmt = 3; } else { if (buf[4]) { /* Is the partition existing? */ bsect = LD_DWORD(&buf[8]); /* Partition offset in LBA */ fmt = check_fs(buf, bsect); /* Check the partition */ } } } if (fmt == 3) return FR_DISK_ERR; if (fmt) return FR_NO_FILESYSTEM; /* No valid FAT patition is found */ /* Initialize the file system object */ if (disk_readp(buf, bsect, 13, sizeof (buf))) return FR_DISK_ERR; fsize = LD_WORD(buf+BPB_FATSz16-13); /* Number of sectors per FAT */ if (!fsize) fsize = LD_DWORD(buf+BPB_FATSz32-13); fsize *= buf[BPB_NumFATs-13]; /* Number of sectors in FAT area */ fs->fatbase = bsect + LD_WORD(buf+BPB_RsvdSecCnt-13); /* FAT start sector (lba) */ fs->csize = buf[BPB_SecPerClus-13]; /* Number of sectors per cluster */ fs->n_rootdir = LD_WORD(buf+BPB_RootEntCnt-13); /* Nmuber of root directory entries */ tsect = LD_WORD(buf+BPB_TotSec16-13); /* Number of sectors on the file system */ if (!tsect) tsect = LD_DWORD(buf+BPB_TotSec32-13); mclst = (tsect /* Last cluster# + 1 */ - LD_WORD(buf+BPB_RsvdSecCnt-13) - fsize - fs->n_rootdir / 16 ) / fs->csize + 2; fs->n_fatent = (CLUST)mclst; fmt = 0; /* Determine the FAT sub type */ if (_FS_FAT12 && mclst < 0xFF7) fmt = FS_FAT12; if (_FS_FAT16 && mclst >= 0xFF8 && mclst < 0xFFF7) fmt = FS_FAT16; if (_FS_FAT32 && mclst >= 0xFFF7) fmt = FS_FAT32; if (!fmt) return FR_NO_FILESYSTEM; fs->fs_type = fmt; if (_FS_32ONLY || (_FS_FAT32 && fmt == FS_FAT32)) fs->dirbase = LD_DWORD(buf+(BPB_RootClus-13)); /* Root directory start cluster */ else fs->dirbase = fs->fatbase + fsize; /* Root directory start sector (lba) */ fs->database = fs->fatbase + fsize + fs->n_rootdir / 16; /* Data start sector (lba) */ fs->flag = 0; FatFs = fs; return FR_OK; } /*-----------------------------------------------------------------------*/ /* Open or Create a File */ /*-----------------------------------------------------------------------*/ FRESULT pf_open ( const char *path /* Pointer to the file name */ ) { FRESULT res; DIR dj; BYTE sp[12], dir[32]; FATFS *fs = FatFs; if (!fs) return FR_NOT_ENABLED; /* Check file system */ fs->flag = 0; dj.fn = sp; res = follow_path(&dj, dir, path); /* Follow the file path */ if (res != FR_OK) return res; /* Follow failed */ if (!dir[0] || (dir[DIR_Attr] & AM_DIR)) /* It is a directory */ { return FR_NO_FILE; ////// commented for debugging } fs->org_clust = get_clust(dir); /* File start cluster */ fs->fsize = LD_DWORD(dir+DIR_FileSize); /* File size */ fs->fptr = 0; /* File pointer */ fs->flag = FA_OPENED; return FR_OK; } /*-----------------------------------------------------------------------*/ /* Read File */ /*-----------------------------------------------------------------------*/ #if _USE_READ FRESULT pf_read ( void* buff, /* Pointer to the read buffer (NULL:Forward data to the stream)*/ UINT btr, /* Number of bytes to read */ UINT* br /* Pointer to number of bytes read */ ) { DRESULT dr; CLUST clst; DWORD sect, remain; UINT rcnt; BYTE cs, *rbuff = buff; FATFS *fs = FatFs; *br = 0; if (!fs) return FR_NOT_ENABLED; /* Check file system */ if (!(fs->flag & FA_OPENED)) /* Check if opened */ return FR_NOT_OPENED; remain = fs->fsize - fs->fptr; if (btr > remain) btr = (UINT)remain; /* Truncate btr by remaining bytes */ while (btr) { /* Repeat until all data transferred */ if ((fs->fptr % 512) == 0) { /* On the sector boundary? */ cs = (BYTE)(fs->fptr / 512 & (fs->csize - 1)); /* Sector offset in the cluster */ if (!cs) { /* On the cluster boundary? */ if (fs->fptr == 0) /* On the top of the file? */ clst = fs->org_clust; else clst = get_fat(fs->curr_clust); if (clst <= 1) ABORT(FR_DISK_ERR); fs->curr_clust = clst; /* Update current cluster */ } sect = clust2sect(fs->curr_clust); /* Get current sector */ if (!sect) ABORT(FR_DISK_ERR); fs->dsect = sect + cs; } rcnt = 512 - (UINT)fs->fptr % 512; /* Get partial sector data from sector buffer */ if (rcnt > btr) rcnt = btr; dr = disk_readp(!buff ? 0 : rbuff, fs->dsect, (UINT)fs->fptr % 512, rcnt); if (dr) ABORT(FR_DISK_ERR); fs->fptr += rcnt; rbuff += rcnt; /* Update pointers and counters */ btr -= rcnt; *br += rcnt; } return FR_OK; } #endif /*-----------------------------------------------------------------------*/ /* Write File */ /*-----------------------------------------------------------------------*/ #if _USE_WRITE FRESULT pf_write ( const void* buff, /* Pointer to the data to be written */ UINT btw, /* Number of bytes to write (0:Finalize the current write operation) */ UINT* bw /* Pointer to number of bytes written */ ) { CLUST clst; DWORD sect, remain; const BYTE *p = buff; BYTE cs; UINT wcnt; FATFS *fs = FatFs; *bw = 0; if (!fs) return FR_NOT_ENABLED; /* Check file system */ if (!(fs->flag & FA_OPENED)) /* Check if opened */ return FR_NOT_OPENED; if (!btw) { /* Finalize request */ if ((fs->flag & FA__WIP) && disk_writep(0, 0)) ABORT(FR_DISK_ERR); fs->flag &= ~FA__WIP; return FR_OK; } else { /* Write data request */ if (!(fs->flag & FA__WIP)) /* Round-down fptr to the sector boundary */ fs->fptr &= 0xFFFFFE00; } remain = fs->fsize - fs->fptr; if (btw > remain) btw = (UINT)remain; /* Truncate btw by remaining bytes */ while (btw) { /* Repeat until all data transferred */ if ((UINT)fs->fptr % 512 == 0) { /* On the sector boundary? */ cs = (BYTE)(fs->fptr / 512 & (fs->csize - 1)); /* Sector offset in the cluster */ if (!cs) { /* On the cluster boundary? */ if (fs->fptr == 0) /* On the top of the file? */ clst = fs->org_clust; else clst = get_fat(fs->curr_clust); if (clst <= 1) ABORT(FR_DISK_ERR); fs->curr_clust = clst; /* Update current cluster */ } sect = clust2sect(fs->curr_clust); /* Get current sector */ if (!sect) ABORT(FR_DISK_ERR); fs->dsect = sect + cs; if (disk_writep(0, fs->dsect)) ABORT(FR_DISK_ERR); /* Initiate a sector write operation */ fs->flag |= FA__WIP; } wcnt = 512 - (UINT)fs->fptr % 512; /* Number of bytes to write to the sector */ if (wcnt > btw) wcnt = btw; if (disk_writep(p, wcnt)) ABORT(FR_DISK_ERR); /* Send data to the sector */ fs->fptr += wcnt; p += wcnt; /* Update pointers and counters */ btw -= wcnt; *bw += wcnt; if ((UINT)fs->fptr % 512 == 0) { if (disk_writep(0, 0)) ABORT(FR_DISK_ERR); /* Finalize the currtent secter write operation */ fs->flag &= ~FA__WIP; } } return FR_OK; } #endif /*-----------------------------------------------------------------------*/ /* Seek File R/W Pointer */ /*-----------------------------------------------------------------------*/ #if _USE_LSEEK FRESULT pf_lseek ( DWORD ofs /* File pointer from top of file */ ) { CLUST clst; DWORD bcs, sect, ifptr; FATFS *fs = FatFs; if (!fs) return FR_NOT_ENABLED; /* Check file system */ if (!(fs->flag & FA_OPENED)) /* Check if opened */ return FR_NOT_OPENED; if (ofs > fs->fsize) ofs = fs->fsize; /* Clip offset with the file size */ ifptr = fs->fptr; fs->fptr = 0; if (ofs > 0) { bcs = (DWORD)fs->csize * 512; /* Cluster size (byte) */ if (ifptr > 0 && (ofs - 1) / bcs >= (ifptr - 1) / bcs) { /* When seek to same or following cluster, */ fs->fptr = (ifptr - 1) & ~(bcs - 1); /* start from the current cluster */ ofs -= fs->fptr; clst = fs->curr_clust; } else { /* When seek to back cluster, */ clst = fs->org_clust; /* start from the first cluster */ fs->curr_clust = clst; } while (ofs > bcs) { /* Cluster following loop */ clst = get_fat(clst); /* Follow cluster chain */ if (clst <= 1 || clst >= fs->n_fatent) ABORT(FR_DISK_ERR); fs->curr_clust = clst; fs->fptr += bcs; ofs -= bcs; } fs->fptr += ofs; sect = clust2sect(clst); /* Current sector */ if (!sect) ABORT(FR_DISK_ERR); fs->dsect = sect + (fs->fptr / 512 & (fs->csize - 1)); } return FR_OK; } #endif /*-----------------------------------------------------------------------*/ /* Create a Directroy Object */ /*-----------------------------------------------------------------------*/ #if _USE_DIR FRESULT pf_opendir ( DIR *dj, /* Pointer to directory object to create */ const char *path /* Pointer to the directory path */ ) { FRESULT res; BYTE sp[12], dir[32]; FATFS *fs = FatFs; if (!fs) { /* Check file system */ res = FR_NOT_ENABLED; } else { dj->fn = sp; res = follow_path(dj, dir, path); /* Follow the path to the directory */ if (res == FR_OK) { /* Follow completed */ if (dir[0]) { /* It is not the root dir */ if (dir[DIR_Attr] & AM_DIR) /* The object is a directory */ dj->sclust = get_clust(dir); else /* The object is not a directory */ res = FR_NO_FILE; } if (res == FR_OK) res = dir_rewind(dj); /* Rewind dir */ } } return res; } /*-----------------------------------------------------------------------*/ /* Read Directory Entry in Sequense */ /*-----------------------------------------------------------------------*/ FRESULT pf_readdir ( DIR *dj, /* Pointer to the open directory object */ FILINFO *fno /* Pointer to file information to return */ ) { FRESULT res; BYTE sp[12], dir[32]; FATFS *fs = FatFs; if (!fs) { /* Check file system */ res = FR_NOT_ENABLED; } else { dj->fn = sp; if (!fno) { res = dir_rewind(dj); } else { res = dir_read(dj, dir); /* Get current directory item */ if (res == FR_NO_FILE) res = FR_OK; if (res == FR_OK) { /* A valid entry is found */ get_fileinfo(dj, dir, fno); /* Get the object information */ res = dir_next(dj); /* Increment read index for next */ if (res == FR_NO_FILE) res = FR_OK; } } } return res; } #endif /* _USE_DIR */
/*-------------------------------------------------------------------------*/ /* PFF - Low level disk control module for AVR (C)ChaN, 2014 */ /*-------------------------------------------------------------------------*/ #include "msp_mmcp.h" /////////////// to do : delete declarations here which are already declared in msp_mmcp.h //#include "pff.h" //#include "diskio.h" // ///*-------------------------------------------------------------------------*/ ///* Platform dependent macros and functions needed to be modified */ ///*-------------------------------------------------------------------------*/ // /////#include <avr/io.h> /* Device specific include files */ //#include <msp430f67791.h> // //#define SELECT() P4OUT &= ~BIT3 /* CS = L */ //#define DESELECT() P4OUT |= BIT3 /* CS = H */ /////#define SELECTING !(PORTB & _BV(3)) /* CS status (true:CS low) */ //#define FORWARD(d) xmit(d) /* Data forwarding function (console out) */ // //void xmit (char); /* Send a byte via software UART */ //void dly_100us (void); /* Delay 100 microseconds */ //void init_spi (void); /* Initialize MMC control ports */ //void xmit_spi (BYTE d); /* Send a byte to the MMC */ //BYTE rcv_spi (void); /* Send a 0xFF to the MMC and get the received byte */ // // ///*-------------------------------------------------------------------------- // // Module Private Functions // //---------------------------------------------------------------------------*/ // ///* Definitions for MMC/SDC command */ //#define CMD0 (0x40+0) /* GO_IDLE_STATE */ //#define CMD1 (0x40+1) /* SEND_OP_COND (MMC) */ //#define ACMD41 (0xC0+41) /* SEND_OP_COND (SDC) */ //#define CMD8 (0x40+8) /* SEND_IF_COND */ //#define CMD16 (0x40+16) /* SET_BLOCKLEN */ //#define CMD17 (0x40+17) /* READ_SINGLE_BLOCK */ //#define CMD24 (0x40+24) /* WRITE_BLOCK */ //#define CMD55 (0x40+55) /* APP_CMD */ //#define CMD58 (0x40+58) /* READ_OCR */ // // ///* Card type flags (CardType) */ //#define CT_MMC 0x01 /* MMC ver 3 */ //#define CT_SD1 0x02 /* SD ver 1 */ //#define CT_SD2 0x04 /* SD ver 2 */ //#define CT_BLOCK 0x08 /* Block addressing */ static BYTE CardType; volatile unsigned int rcv_spi_count = 0; volatile BYTE ty_copy; //void xmit (char) //{ //} void dly_100us (void) { // MCLK= 16 MHz, 1 NOP = 0.06us, if microSec=1 then delay= (0.06*16) * 1 = 0.96us (approx 1 us) unsigned int microSec= 100; unsigned long int i; for ( i= 16*microSec ; i > 0 ; i--) { _NOP(); } } void init_spi (void) { P4DIR |= BIT5 | BIT6; // MOSI, CLK as o/p P4DIR &= ~BIT4; // MISO as i/p P4SEL0 |= BIT4 | BIT5 |BIT6; // SPI UCB1CTLW0 |= UCSWRST; // **Put state machine in reset** UCB1CTLW0 |= UCMST | UCSYNC | UCCKPL | UCMSB; // 3-pin, 8-bit SPI master // Clock polarity high, MSB UCB1CTLW0 |= UCSSEL_2; // SMCLK UCB1BRW = 84; // SMCLK/34 = 500kHz, SMCLK/84 = 200kHz UCB1CTLW0 &= ~UCSWRST; // **Initialize USCI state machine** /// UCB1IE = UCRXIE; // Enable USCI_A0 RX,TX interrupt } void xmit_spi (BYTE d) { while (!(UCB1IFG & UCTXIFG)) ; // USCI_B1 TX buffer ready? UCB1TXBUF = d; // Transmit character } BYTE rcv_spi (void) { char recd_byte; rcv_spi_count++; xmit_spi(0xFF); while (!(UCB1IFG & UCRXIFG)); //USCI_B1 RX buffer filled ? recd_byte = UCB1RXBUF; return recd_byte; } /*-----------------------------------------------------------------------*/ /* Send a command packet to MMC */ /*-----------------------------------------------------------------------*/ static BYTE send_cmd ( BYTE cmd, /* 1st byte (Start + Index) */ DWORD arg /* Argument (32 bits) */ ) { BYTE n, res; if (cmd & 0x80) { /* ACMD<n> is the command sequense of CMD55-CMD<n> */ cmd &= 0x7F; res = send_cmd(CMD55, 0); if (res > 1) return res; } /* Select the card */ DESELECT(); rcv_spi(); SELECT(); rcv_spi(); /* Send a command packet */ xmit_spi(cmd); /* Start + Command index */ xmit_spi((BYTE)(arg >> 24)); /* Argument[31..24] */ xmit_spi((BYTE)(arg >> 16)); /* Argument[23..16] */ xmit_spi((BYTE)(arg >> 8)); /* Argument[15..8] */ xmit_spi((BYTE)arg); /* Argument[7..0] */ n = 0x01; /* Dummy CRC + Stop */ if (cmd == CMD0) n = 0x95; /* Valid CRC for CMD0(0) */ if (cmd == CMD8) n = 0x87; /* Valid CRC for CMD8(0x1AA) */ xmit_spi(n); /* Receive a command response */ n = 10; /* Wait for a valid response in timeout of 10 attempts */ do { res = rcv_spi(); } while ((res & 0x80) && --n); return res; /* Return with the response value */ } /*-------------------------------------------------------------------------- Public Functions ---------------------------------------------------------------------------*/ /*-----------------------------------------------------------------------*/ /* Initialize Disk Drive */ /*-----------------------------------------------------------------------*/ DSTATUS disk_initialize (void) { BYTE n, cmd, ty, ocr[4]; UINT tmr; volatile unsigned int CSstatus; #if _USE_WRITE //if (CardType && SELECTING) disk_writep(0, 0); /* Finalize write process if it is in progress */ if (CardType) { CSstatus= P4OUT & BIT3; if(CSstatus == 0) // if CS is low { disk_writep(0, 0); /* Finalize write process if it is in progress */ } } #endif init_spi(); /* Initialize ports to control MMC */ DESELECT(); for (n = 10; n; n--) { rcv_spi(); /* 80 dummy clocks with CS=H */ } ty = 0; if (send_cmd(CMD0, 0) == 1) { /* GO_IDLE_STATE */ if (send_cmd(CMD8, 0x1AA) == 1) { /* SDv2 */ for (n = 0; n < 4; n++) ocr[n] = rcv_spi(); /* Get trailing return value of R7 resp */ if (ocr[2] == 0x01 && ocr[3] == 0xAA) { /* The card can work at vdd range of 2.7-3.6V */ for (tmr = 10000; tmr && send_cmd(ACMD41, 1UL << 30); tmr--) { dly_100us(); /* Wait for leaving idle state (ACMD41 with HCS bit) */ } if (tmr && send_cmd(CMD58, 0) == 0) /* Check CCS bit in the OCR */ { for (n = 0; n < 4; n++) { ocr[n] = rcv_spi(); } ty = (ocr[0] & 0x40) ? CT_SD2 | CT_BLOCK : CT_SD2; /* SDv2 (HC or SC) */ } } } else { /* SDv1 or MMCv3 */ if (send_cmd(ACMD41, 0) <= 1) { ty = CT_SD1; cmd = ACMD41; /* SDv1 */ } else { ty = CT_MMC; cmd = CMD1; /* MMCv3 */ } for (tmr = 10000; tmr && send_cmd(cmd, 0); tmr--) { dly_100us(); /* Wait for leaving idle state */ } if (!tmr || send_cmd(CMD16, 512) != 0) /* Set R/W block length to 512 */ { ty = 0; } } } CardType = ty; DESELECT(); rcv_spi(); ty_copy = ty; // debugging return ty ? 0 : STA_NOINIT; } /*-----------------------------------------------------------------------*/ /* Read partial sector */ /*-----------------------------------------------------------------------*/ DRESULT disk_readp ( BYTE *buff, /* Pointer to the read buffer (NULL:Forward to the stream) */ DWORD sector, /* Sector number (LBA) */ UINT offset, /* Byte offset to read from (0..511) */ UINT count /* Number of bytes to read (ofs + cnt mus be <= 512) */ ) { DRESULT res; BYTE rc; UINT bc; if (!(CardType & CT_BLOCK)) sector *= 512; /* Convert to byte address if needed */ res = RES_ERROR; if (send_cmd(CMD17, sector) == 0) { /* READ_SINGLE_BLOCK */ bc = 40000; /* Time counter */ do { /* Wait for data packet */ rc = rcv_spi(); } while (rc == 0xFF && --bc); if (rc == 0xFE) { /* A data packet arrived */ bc = 512 + 2 - offset - count; /* Number of trailing bytes to skip */ /* Skip leading bytes */ while (offset--) rcv_spi(); /* Receive a part of the sector */ if (buff) { /* Store data to the memory */ do { *buff++ = rcv_spi(); } while (--count); } else { /* Forward data to the outgoing stream */ do { /// FORWARD(rcv_spi()); } while (--count); } /* Skip trailing bytes and CRC */ do rcv_spi(); while (--bc); res = RES_OK; } } DESELECT(); rcv_spi(); return res; } /*-----------------------------------------------------------------------*/ /* Write partial sector */ /*-----------------------------------------------------------------------*/ #if _USE_WRITE DRESULT disk_writep ( const BYTE *buff, /* Pointer to the bytes to be written (NULL:Initiate/Finalize sector write) */ DWORD sc /* Number of bytes to send, Sector number (LBA) or zero */ ) { DRESULT res; UINT bc; static UINT wc; /* Sector write counter */ res = RES_ERROR; if (buff) { /* Send data bytes */ bc = sc; while (bc && wc) { /* Send data bytes to the card */ xmit_spi(*buff++); wc--; bc--; } res = RES_OK; } else { if (sc) { /* Initiate sector write process */ if (!(CardType & CT_BLOCK)) sc *= 512; /* Convert to byte address if needed */ if (send_cmd(CMD24, sc) == 0) { /* WRITE_SINGLE_BLOCK */ xmit_spi(0xFF); xmit_spi(0xFE); /* Data block header */ wc = 512; /* Set byte counter */ res = RES_OK; } } else { /* Finalize sector write process */ bc = wc + 2; while (bc--) xmit_spi(0); /* Fill left bytes and CRC with zeros */ if ((rcv_spi() & 0x1F) == 0x05) { /* Receive data resp and wait for end of write process in timeout of 500ms */ for (bc = 5000; rcv_spi() != 0xFF && bc; bc--) /* Wait for ready */ dly_100us(); if (bc) res = RES_OK; } DESELECT(); rcv_spi(); } } return res; } #endif