LowLevel/Luma3DS-3GX
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Make Luma arm9 code properly write date when touching files

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This commit is contained in:
TuxSH 2019-06-03 23:15:30 +02:00
parent af10782500
commit 2cf04e8a83
3 changed files with 56 additions and 18 deletions
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37
arm9/source/fatfs/diskio.c
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@ -10,6 +10,7 @@
#include "diskio.h" /* FatFs lower layer API */
#include "sdmmc/sdmmc.h"
#include "../crypto.h"
#include "../i2c.h"
/* Definitions of physical drive number for each media */
#define SDCARD 0
@ -99,3 +100,39 @@ DRESULT disk_ioctl (
return cmd == CTRL_SYNC ? RES_OK : RES_PARERR;
}
#endif
// From GodMode9
#define BCDVALID(b) (((b)<=0x99)&&(((b)&0xF)<=0x9)&&((((b)>>4)&0xF)<=0x9))
#define BCD2NUM(b) (BCDVALID(b) ? (((b)&0xF)+((((b)>>4)&0xF)*10)) : 0xFF)
#define NUM2BCD(n) ((n<99) ? (((n/10)*0x10)|(n%10)) : 0x99)
#define DSTIMEGET(bcd,n) (BCD2NUM((bcd)->n))
// see: http://3dbrew.org/wiki/I2C_Registers#Device_3 (register 30)
typedef struct DsTime {
u8 bcd_s;
u8 bcd_m;
u8 bcd_h;
u8 weekday;
u8 bcd_D;
u8 bcd_M;
u8 bcd_Y;
u8 leap_count;
} DsTime;
/*-----------------------------------------------------------------------*/
/* Get current FAT time */
/*-----------------------------------------------------------------------*/
DWORD get_fattime( void ) {
DsTime dstime;
I2C_readRegBuf(I2C_DEV_MCU, 0x30, (u8 *)&dstime, sizeof(DsTime));
DWORD fattime =
((DSTIMEGET(&dstime, bcd_s)&0x3F) >> 1 ) |
((DSTIMEGET(&dstime, bcd_m)&0x3F) << 5 ) |
((DSTIMEGET(&dstime, bcd_h)&0x3F) << 11) |
((DSTIMEGET(&dstime, bcd_D)&0x1F) << 16) |
((DSTIMEGET(&dstime, bcd_M)&0x0F) << 21) |
(((DSTIMEGET(&dstime, bcd_Y)+(2000-1980))&0x7F) << 25);
return fattime;
}

1
arm9/source/fatfs/diskio.h
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@ -38,6 +38,7 @@ DRESULT disk_read (BYTE pdrv, BYTE* buff, DWORD sector, UINT count);
DRESULT disk_write (BYTE pdrv, const BYTE* buff, DWORD sector, UINT count);
DRESULT disk_ioctl (BYTE pdrv, BYTE cmd, void* buff);
DWORD get_fattime( void ); // not a disk control function, but fits here
/* Disk Status Bits (DSTATUS) */

2
arm9/source/fatfs/ffconf.h
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@ -236,7 +236,7 @@
/ Note that enabling exFAT discards ANSI C (C89) compatibility. */
#define FF_FS_NORTC 1
#define FF_FS_NORTC 0
#define FF_NORTC_MON 1
#define FF_NORTC_MDAY 1
#define FF_NORTC_YEAR 2019