138 lines
4.8 KiB
C
138 lines
4.8 KiB
C
/*-----------------------------------------------------------------------*/
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/* Low level disk I/O module skeleton for FatFs (C)ChaN, 2014 */
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/*-----------------------------------------------------------------------*/
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/* If a working storage control module is available, it should be */
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/* attached to the FatFs via a glue function rather than modifying it. */
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/* This is an example of glue functions to attach various exsisting */
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/* storage control modules to the FatFs module with a defined API. */
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/*-----------------------------------------------------------------------*/
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#include "diskio.h" /* FatFs lower layer API */
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#include "sdmmc/sdmmc.h"
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#include "../crypto.h"
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#include "../i2c.h"
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/* Definitions of physical drive number for each media */
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#define SDCARD 0
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#define CTRNAND 1
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/*-----------------------------------------------------------------------*/
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/* Get Drive Status */
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/*-----------------------------------------------------------------------*/
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DSTATUS disk_status (
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__attribute__((unused))
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BYTE pdrv /* Physical drive nmuber to identify the drive */
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)
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{
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return RES_OK;
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}
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/*-----------------------------------------------------------------------*/
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/* Inidialize a Drive */
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/*-----------------------------------------------------------------------*/
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DSTATUS disk_initialize (
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BYTE pdrv /* Physical drive nmuber to identify the drive */
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)
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{
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static u32 sdmmcInitResult = 4;
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if(sdmmcInitResult == 4) sdmmcInitResult = sdmmc_sdcard_init();
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return ((pdrv == SDCARD && !(sdmmcInitResult & 2)) ||
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(pdrv == CTRNAND && !(sdmmcInitResult & 1) && !ctrNandInit())) ? 0 : STA_NOINIT;
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}
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/*-----------------------------------------------------------------------*/
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/* Read Sector(s) */
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/*-----------------------------------------------------------------------*/
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DRESULT disk_read (
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BYTE pdrv, /* Physical drive nmuber to identify the drive */
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BYTE *buff, /* Data buffer to store read data */
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DWORD sector, /* Sector address in LBA */
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UINT count /* Number of sectors to read */
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)
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{
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return ((pdrv == SDCARD && !sdmmc_sdcard_readsectors(sector, count, buff)) ||
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(pdrv == CTRNAND && !ctrNandRead(sector, count, buff))) ? RES_OK : RES_PARERR;
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}
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/*-----------------------------------------------------------------------*/
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/* Write Sector(s) */
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/*-----------------------------------------------------------------------*/
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#if _USE_WRITE
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DRESULT disk_write (
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BYTE pdrv, /* Physical drive nmuber to identify the drive */
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const BYTE *buff, /* Data to be written */
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DWORD sector, /* Sector address in LBA */
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UINT count /* Number of sectors to write */
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)
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{
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return ((pdrv == SDCARD && (*(vu16 *)(SDMMC_BASE + REG_SDSTATUS0) & TMIO_STAT0_WRPROTECT) != 0 && !sdmmc_sdcard_writesectors(sector, count, buff)) ||
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(pdrv == CTRNAND && !ctrNandWrite(sector, count, buff))) ? RES_OK : RES_PARERR;
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}
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#endif
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/*-----------------------------------------------------------------------*/
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/* Miscellaneous Functions */
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/*-----------------------------------------------------------------------*/
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#if _USE_IOCTL
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DRESULT disk_ioctl (
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__attribute__((unused))
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BYTE pdrv, /* Physical drive nmuber (0..) */
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BYTE cmd, /* Control code */
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__attribute__((unused))
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void *buff /* Buffer to send/receive control data */
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)
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{
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return cmd == CTRL_SYNC ? RES_OK : RES_PARERR;
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}
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#endif
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// From GodMode9
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#define BCDVALID(b) (((b)<=0x99)&&(((b)&0xF)<=0x9)&&((((b)>>4)&0xF)<=0x9))
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#define BCD2NUM(b) (BCDVALID(b) ? (((b)&0xF)+((((b)>>4)&0xF)*10)) : 0xFF)
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#define NUM2BCD(n) ((n<99) ? (((n/10)*0x10)|(n%10)) : 0x99)
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#define DSTIMEGET(bcd,n) (BCD2NUM((bcd)->n))
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// see: http://3dbrew.org/wiki/I2C_Registers#Device_3 (register 30)
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typedef struct DsTime {
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u8 bcd_s;
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u8 bcd_m;
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u8 bcd_h;
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u8 weekday;
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u8 bcd_D;
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u8 bcd_M;
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u8 bcd_Y;
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u8 leap_count;
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} DsTime;
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/*-----------------------------------------------------------------------*/
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/* Get current FAT time */
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/*-----------------------------------------------------------------------*/
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DWORD get_fattime( void ) {
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DsTime dstime;
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I2C_readRegBuf(I2C_DEV_MCU, 0x30, (u8 *)&dstime, sizeof(DsTime));
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DWORD fattime =
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((DSTIMEGET(&dstime, bcd_s)&0x3F) >> 1 ) |
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((DSTIMEGET(&dstime, bcd_m)&0x3F) << 5 ) |
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((DSTIMEGET(&dstime, bcd_h)&0x3F) << 11) |
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((DSTIMEGET(&dstime, bcd_D)&0x1F) << 16) |
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((DSTIMEGET(&dstime, bcd_M)&0x0F) << 21) |
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(((DSTIMEGET(&dstime, bcd_Y)+(2000-1980))&0x7F) << 25);
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return fattime;
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} |