; You should have received a copy of the GNU General Public License
; along with this program. If not, see <http://www.gnu.org/licenses/>.
-; =====================================================================
-; goal : accept 64 MB up to 64 GB SD_CARD
-; =====================================================================
-; thus FAT and RootClus logical sectors are word addressable.
-
-; FAT is a little endian structure.
-; CMD frame is sent as big endian.
-
-; we assume that SDSC Card (up to 2GB) is FAT16 with a byte addressing
-; and that SDHC Card (4GB up to 64GB) is FAT32 with a sector addressing (sector = 512 bytes)
-; for SDHC Card = 64 GB, cluster = 64 sectors ==> max clusters = 20 0000h ==> FAT size = 16384 sectors
-; ==> FAT1 and FAT2 can be addressed with a single word.
-
-; ref. https://en.wikipedia.org/wiki/Extended_boot_record
-; ref. https://en.wikipedia.org/wiki/Partition_type
-
-; Formatage FA16 d'une SDSC Card 2GB
-; First sector of physical drive (sector 0) content :
-; ---------------------------------------------------
-; dec@| HEX@
-; 446 |0x1BE : partition table first record ==> logical drive 0
-; 446 |0x1CE : partition table 2th record ==> logical drive 1
-; 446 |0x1DE : partition table 3th record ==> logical drive 2
-; 446 |0x1EE : partition table 4th record ==> logical drive 3
-
-; partition record content :
-; ---------------------------------------------------
-; dec@|HEX@ = HEX decimal
-; 0 |0x00 = 0x00 : not bootable
-; 1 |0x01 = 02 0C 00 : Org Cylinder/Head/Sector offset (CHS-addressing) = not used
-; 4 |0x04 = 0x0E : type FAT16 using LBA addressing = 14 ==> FAT16
-; 5 |0x05 = ED 3F EE : End Cylinder/Head/Sector offset (CHS-addressing) = not used
-; 8 |0x08 = 00 20 00 00 : sectors offset of logical drive = 8192
-; 12 |0x0C = 00 40 74 00 : sectors size of logical drive = 7618560 sectors
-
-; 450 |0x04 = 0x0E : type FAT16 using LBA addressing = 14 ==> set FATtype = FAT16 with byte CMD addressing
-; 454 |0x1C6 = 89 00 : FirstSector (of logical drive 0) BS_FirstSector = 137
-
-
-; ref. https://www.compuphase.com/mbr_fat.htm#BOOTSECTOR
-
-; FirstSector of logical drive (sector 0) content :
-; -------------------------------------------------
-; dec@| HEX@ = HEX decimal
-; 11 | 0x0B = 00 02 : 512 bytes/sector BPB_BytsPerSec = 512
-; 13 | 0x0D = 40 : 64 sectors/cluster BPB_SecPerClus = 64
-; 14 | 0x0E = 01 00 : 2 reserved sectors BPB_RsvdSecCnt = 1
-; 16 | 0x10 = 02 : 2 FATs BPB_NumFATs = 2 (always 2)
-; 17 | 0x11 = 00 02 : 512 entries/directory BPB_RootEntCnt = 512
-; 19 | 0x13 = 00 00 : BPB_TotSec16 (if < 65535) BPB_TotSec16 = 0
-; 22 | 0x16 = EB 00 : 235 sectors/FAT (FAT16) BPB_FATSize = 235
-; 32 | 0x20 = 77 9F 3A 00 : 3841911 total sectors BPB_TotSec32 = 3841911
-; 54 | 0x36 = "FAT16" BS_FilSysType (not used)
-
-; all values below are evaluated in logical sectors
-; FAT1 = BPB_RsvdSecCnt = 1
-; FAT2 = BPB_RsvdSecCnt + BPB_FATSz32 = 1 + 235 = 236
-; OrgRootDirL = BPB_RsvdSecCnt + (BPB_FATSize * BPB_NumFATs) = 471
-; RootDirSize = BPB_RootEntCnt * 32 / BPB_BytsPerSec = 32 sectors
-; OrgDatas = OrgRootDir + RootDirSize = 503
-; OrgCluster = OrgRootDir - 2*BPB_SecPerClus = 375 (virtual value)
-; FirstSectorOfCluster(n) = OrgCluster + n*BPB_SecPerClus ==> cluster(3) = 705
-
-; ====================================================================================
-
-; Formatage FA32 d'une SDSC Card 8GB
-; First sector of physical drive (sector 0) content :
-; ---------------------------------------------------
-; dec@| HEX@
-; 446 |0x1BE : partition table first record ==> logical block 0
-; 446 |0x1CE : partition table 2th record ==> logical block 1
-; 446 |0x1DE : partition table 3th record ==> logical block 2
-; 446 |0x1EE : partition table 4th record ==> logical block 3
-
-; partition record content :
-; ---------------------------------------------------
-; dec@|HEX@ = HEX decimal
-; 0 |0x00 = 0x00 : not bootable
-; 1 |0x01 = 82 03 00 : Org CHS offset (Cylinder/Head/Sector) = not used
-; 4 |0x04 = 0x0C : type FAT32 using LBA addressing = 12 ==> set FATtype = FAT32 with sector CMD addressing
-; 5 |0x05 = 82 03 00 : End offset (Cylinder/Head/Sector offset) = not used
-; 8 |0x08 = 00 20 00 00 : sectors offset of logical block = 8192
-; 12 |0x0C = 00 40 74 00 : sectors size of logical block = 7618560
-
-; 454 |0x1C6 = 00 20 00 00 : FirstSector (of logical drive 0) = BS_FirstSector = 8192
-
-;
-; FirstSector of logical block (sector 0) content :
-; -------------------------------------------------
-; dec@| HEX@ = HEX decimal
-; 11 | 0x0B = 00 02 : 512 bytes/sector BPB_BytsPerSec = 512
-; 13 | 0x0D = 08 : 8 sectors/cluster BPB_SecPerClus = 8
-; 14 | 0x0E = 20 00 : 32 reserved sectors BPB_RsvdSecCnt = 32
-; 16 | 0x10 = 02 : 2 FATs BPB_NumFATs = 2 (always 2)
-; 17 | 0x11 = 00 00 : 0 BPB_RootEntCnt = 0 (always 0 for FAT32)
-
-; 32 | 0x20 = 00 C0 EC 00 : BPB_TotSec32 BPB_TotSec32 = 15515648
-; 36 | 0x24 = 30 3B 00 00 : BPB_FATSz32 BPB_FATSz32 = 15152
-; 40 | 0x28 = 00 00 : BPB_ExtFlags BPB_ExtFlags
-; 44 | 0x2C = 02 00 00 00 : BPB_RootClus BPB_RootClus = 2
-; 48 | 0x30 = 01 00 : BPB_FSInfo BPB_FSInfo = 1
-; 50 | 0x33 = 06 00 : BPB_BkBootSec BPB_BkBootSec = 6
-; 82 | 0x52 = "FAT32" : BS_FilSysType BS_FilSysType (not used)
-
-;
-; all values below are evaluated in logical sectors
-; FAT1 = BPB_RsvdSecCnt = 32
-; FAT2 = BPB_RsvdSecCnt + BPB_FATSz32 = 32 + 15152 = 15184
-; OrgRootDirL = BPB_RsvdSecCnt + BPB_FATSz32 * BPB_NumFATs = 32 + 15152*2 = 30336
-; OrgCluster = OrgRootDir - 2*BPB_SecPerClus = 30320
-; RootDirSize = BPB_RootEntCnt * 32 / BPB_BytsPerSec = 0
-; OrgDatas = OrgRootDir + RootDirSize = 30336
-; FirstSectorOfCluster(n) = OrgCluster + n*BPB_SecPerClus ==> cluster(6) = 30368
-
BytsPerSec .equ 512
; all sectors are computed as logical, then physically translated at last time by RW_Sector_CMD
+sendCommandIdleRet ; <=== CMD0, CMD8, CMD55: W = 1 = R1 expected response = idle (forthMSP430FR_SD_INIT.asm)
+ MOV #1,W ; expected R1 response (first byte of SPI R7) = 01h : idle state
+ JMP sendCommand ;
+
; in SPI mode CRC is not required, but CMD frame must be ended with a stop bit
; ==================================;
RW_Sector_CMD ;WX <=== CMD17 or CMD24 (read or write Sector CMD)
CMP #2,&FATtype ;3 FAT32 ?
JZ FAT32_CMD ;2 yes
FAT16_CMD ; FAT16 : CMD17/24 byte address = Sector * BPB_BytsPerSec
- ADD W,W ; shift left one Sector
- ADDC.B X,X ;
- MOV W,&SD_CMD_FRM+2 ; $(01 00 ll LL xx CMD)
- MOV.B X,&SD_CMD_FRM+4 ; $(01 00 ll LL hh CMD)
+ ADD W,W ;1 shift left one Sector
+ ADDC.B X,X ;1
+ MOV W,&SD_CMD_FRM+2 ;3 $(01 00 ll LL xx CMD)
+ MOV.B X,&SD_CMD_FRM+4 ;3 $(01 00 ll LL hh CMD)
JMP WaitIdleBeforeSendCMD ;
FAT32_CMD ; FAT32 : CMD17/24 sector address
MOV.B W,&SD_CMD_FRM+1 ;3 $(01 ll xx xx xx CMD)
WaitIdleBeforeSendCMD ; <=== CMD41, CMD1, CMD16 (forthMSP430FR_SD_INIT.asm)
; ==================================;
CALL #SPI_GET ;
- CMP.B #-1,W ; FFh = expected value <==> MISO = 1 = not busy = idle state
- JNE WaitIdleBeforeSendCMD ; loop back until idle state
- MOV #0,W ; W = expected R1 response = ready, for CMD41,CMD16, CMD17, CMD24
-; ==================================;
-sendCommand ;X <=== CMD0, CMD8, CMD55: W = R1 expected response = idle (forthMSP430FR_SD_INIT.asm)
+ ADD.B #1,W ; expected value = FFh <==> MISO = 1 = not busy = idle state
+ JNE WaitIdleBeforeSendCMD ; loop back if <> FFh
+; ==================================; W = 0 = expected R1 response = ready, for CMD41,CMD16, CMD17, CMD24
+sendCommand ;X
; ==================================;
; input : SD_CMD_FRM : {CRC,byte_l,byte_L,byte_h,byte_H,CMD}
; W = expected return value
; PUT value must be a word or byte:byte because little endian to big endian conversion
; ==================================;
-SPI_GET ; PUT(FFh)
-; ==================================; output : W = received byte, X = 0 always
+SPI_GET ; PUT(FFh), output : W = received byte, X = 0
+; ==================================;
MOV #1,X ;1
; ==================================;
-SPI_X_GET ; PUT(FFh) X times
-; ==================================; output : W = last received byte, X = 0
- MOV #-1,W ;1
+SPI_X_GET ; PUT(FFh) X times, output : W = last received byte, X = 0
+; ==================================;
+ MOV #-1,W ;1 W = FFFFh
+; ==================================;
+SPI_PUT ; PUT(W) X time, output : W = last received byte, X = 0
; ==================================;
-SPI_PUT ; PUT(W) X time
-; ==================================; output : W = last received byte, X = 0
SWPB W ;1
MOV.B W,&SD_TXBUF ;3 put W high byte then W low byte and so forth, that performs little to big endian conversion
CMP #0,&SD_BRW ;3 full speed ?
; ==================================;
ADD &OrgFAT1,W ;
; ==================================;
-readSectorW ; read a logical sector up to 65535 (case of FAT1,FAT2)
+readSectorW ; read a logical sector < 65536
; ==================================;
MOV #0,X ;
; ==================================;
-readSectorWX ; read a logical sector
+readSectorWX ; SWX read a logical sector
; ==================================;
BIS #1,S ; preset sd_read error
MOV.B #51h,&SD_CMD_FRM+5 ; CMD17 = READ_SINGLE_BLOCK
WaitFEhResponse ; wait SD_Card response FEh
; ----------------------------------;
CALL #SPI_GET ;
- CMP.B #-2,W ; FEh expected value
- JZ ReadSectorfirst ; 2
- JNZ WaitFEhResponse ;
+ ADD.B #2,W ;1 FEh expected value
+ JZ ReadSectorFirstByte ; 2
+ JNZ WaitFEhResponse ;2
; ----------------------------------;
-ReadSectorLoop ; get 512+1 bytes, write 512 bytes
+ReadSectorLoop ; get 512+1 bytes, write 512 bytes in SD_BUF
; ----------------------------------;
- MOV.B &SD_RXBUF,BUFFER-1(X) ; 5
-ReadSectorfirst ;
+ MOV.B &SD_RXBUF,SD_BUF-1(X) ; 5
+ReadSectorFirstByte ;
MOV.B #-1,&SD_TXBUF ; 3 put FF
NOP ; 1 NOPx adjusted to avoid read SD_error
ADD #1,X ; 1
; ----------------------------------;
WriteSectorLoop ; 11 cycles loop write, starts with X = 0
; ----------------------------------;
- MOV.B BUFFER(X),&SD_TXBUF ; 5
+ MOV.B SD_BUF(X),&SD_TXBUF ; 5
NOP ; 1 NOPx adjusted to avoid write SD_error
ADD #1,X ; 1
CMP #BytsPerSec,X ; 2
; 6th bit = address error
; 7th bit = parameter error
+; Data Response Token
+; Every data block written to the card will be acknowledged by a data response token.
+; It is one byte long and has the following format:
+; 7 6 5 4 3 2 1 0
+; x x x 0 Status 1
+;The meaning of the status bits is defined as follows:
+;'010' - Data accepted.
+;'101' - Data rejected due to a CRC error.
+;'110' - Data Rejected due to a Write Error
+
; ----------------------------------;
SD_CARD_ERROR ; <=== SD_INIT errors 4,8,$10
; ----------------------------------;
SWPB S ; High Level error in High byte
- ADD &SD_RXBUF,S ; add SPI(GET) return value to high level error
-SD_CARD_ID_ERROR ; <=== SD_INIT error $20
+ ADD &SD_RXBUF,S ; add SPI(GET) return value as low byte error
+SD_CARD_ID_ERROR ; <=== SD_INIT error $20 from forthMSP430FR_SD_LowLvl.asm
BIS.B #SD_CS,&SD_CSOUT ; SD_CS = high
mDOCOL ;
+ .word ECHO
.word XSQUOTE ;
.byte 11,"< SD Error!" ;
; ----------------------------------;
-SD_QABORTYES ; <=== OPEN/READ and WRITE errors
+SD_QABORTYES ; <=== OPEN file errors from forthMSP430FR_SD_LOAD.asm
; ----------------------------------;
FORTHtoASM ;
- SUB #4,PSP ;
- MOV TOS,2(PSP) ;
- MOV &BASE,0(PSP) ;
+ SUB #2,PSP ; to avoid stack underflow crash
MOV #10h,&BASE ; select hex
MOV S,TOS ;
ASMtoFORTH ;
.word UDOT ;
- .word FBASE,STORE ; restore base
- .word QABORTYES ;
+ .word QABORTYES ; no return...
; ----------------------------------;
OSDN Git Service
