; First sector of physical drive (sector 0) content :
; ---------------------------------------------------
; dec@| HEX@
-; 446 |0x1BE : partition table first record ==> logical drive 0
+; 446 |0x1BE : partition table first record ==> logical drive 0
; 462 |0x1CE : partition table 2th record ==> logical drive 1
; 478 |0x1DE : partition table 3th record ==> logical drive 2
; 494 |0x1EE : partition table 4th record ==> logical drive 3
; First sector of physical drive (sector 0) content :
; ---------------------------------------------------
; dec@| HEX@
-; 446 |0x1BE : partition table first record ==> logical drive 0
+; 446 |0x1BE : partition table first record ==> logical drive 0
; 462 |0x1CE : partition table 2th record ==> logical drive 1
; 478 |0x1DE : partition table 3th record ==> logical drive 2
; 494 |0x1EE : partition table 4th record ==> logical drive 3
; 450 |0x1C2 = 0x0C : type FAT32 using LBA addressing
; 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
; 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
+; 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
.restore
; ===========================================================
-; Init hardware SD_Card, called by WARM
+; WARNING! SD_INIT DRAW BIG CURRENT; IF THE SUPPLY IS TOO WEAK
+; THE SD_CARD LOW VOLTAGE THRESHOLD MAY BE REACHED ==> SD_ERROR 4FF !
; ===========================================================
+
+; ===========================================================
+; Init SD_Card software, called by INIT_FORTH(INIT_SOFT_APP)
+; ===========================================================
+;-----------------------------------;
+INIT_SOFT_SD ; called by INI_FORTH common part of ?ABORT|RST
+;-----------------------------------;
+; CMP #0,TOS ; USERSYS = 0 ?
+; JZ INIT_HSD_END ; no hardware init if USERSYS = 0 SYS
+; MOV #HandlesLen,X ; clear all handles
+;ClearHandle SUB #2,X ; 1
+; MOV #0,FirstHandle(X) ; 3
+; JNZ ClearHandle ; 2
+ MOV #0,&CurrentHdl ;
+ MOV #INIT_SOFT_TERM,PC ; link to previous INI_SOFT_APP then RET
;-----------------------------------;
-INIT_SD CALL @PC+ ; link to previous INI_APP
-INIT_SD_PFA .word INIT_TERM ; which activates all previous I/O settings and set TOS = RSTIV_MEM.
+
+; ===========================================================
+; Init hardware SD_Card, called by WARM(INIT_HARD_APP)
+; ===========================================================
+
+; web search: "SDA simplified specifications"
+
;-----------------------------------;
- CMP #0,TOS ; RSTIV_MEM = WARM ?
- JZ INI_SD_END ; no init if RSTIV_MEM = WARM
+INIT_HARD_SD CALL @PC+ ; link to previous INI_HARD_APP
+ .word INIT_TERM ; which activates all previous I/O settings and set TOS = RSTIV_MEM.
;-----------------------------------;
BIT.B #CD_SD,&SD_CDIN ; SD_memory in SD_Card module ?
- JNZ INI_SD_END ; no
+ JNZ INIT_HSD_END ; no
;-----------------------------------;
MOV #0A981h,&SD_CTLW0 ; UCxxCTL1 = CKPH, MSB, MST, SPI_3, SMCLK + UCSWRST
- MOV #FREQUENCY*3,&SD_BRW; UCxxBRW init SPI CLK = 333 kHz ( < 400 kHz) for SD_Card initialisation
+ MOV #FREQUENCY*3,&SD_BRW; UCxxBRW init SPI CLK = 333 kHz ( <= 400 kHz) for SD_Card initialisation
BIS.B #CS_SD,&SD_CSDIR ; SD Chip Select as output high
BIS #BUS_SD,&SD_SEL ; Configure pins as SIMO, SOMI & SCK (PxDIR.y are controlled by eUSCI module)
BIC #1,&SD_CTLW0 ; release eUSCI from reset
;-----------------------------------;
- .IF RAM_LEN < 2048 ; case of MSP430FR57xx : SD datas are in FRAM not initialized by RESET.
- MOV #SD_LEN,X ; clear all SD datas
+ MOV #SD_LEN,X ; clear all SD datas
ClearSDdata SUB #2,X ; 1
- MOV #0,SD_ORG(X) ; 3
+ MOV #0,SD_ORG(X) ; 3
JNZ ClearSDdata ; 2
- .ENDIF ;
;-----------------------------------;
SD_POWER_ON
; ----------------------------------;
- MOV #8,X ; send 64 clk on SD_clk
+ MOV #8,X ; send 8*8 = 64 clk on SPI
CALL #SPI_X_GET ;
BIC.B #CS_SD,&SD_CSOUT ; preset Chip Select output low to switch in SPI mode
; ----------------------------------;
-INIT_CMD0 ; all SD area is 0 filled
+INIT_CMD0 ; SD_CMD_FRM+2 is already cleared...
; ----------------------------------;
MOV #4,S ; preset error 4R1 for CMD0
- MOV #95h,&SD_CMD_FRM ; $(95 00 00 00 00 00)
- MOV #4000h,&SD_CMD_FRM+4 ; $(95 00 00 00 00 40); send CMD0
+ MOV #0095h,&SD_CMD_FRM ; $(95 00 00 00 00 00)
+ MOV #4000h,&SD_CMD_FRM+4 ; $(95 00 00 00 00 40) = CMD0
; ----------------------------------;
-SEND_CMD0 ; CMD0 : GO_IDLE_STATE expected SPI_R1 response = 1 = idle state
+SEND_CMD0 ; GO_IDLE_STATE, expected SPI_R1 response = 1 = idle state
; ----------------------------------;
- CALL #sendCommandIdleRet ;X
+ CALL #sendCommandIdleRet ;X send command (does little to big endian conversion), see forthMSP430FR_SD_lowLvl.asm
JZ INIT_CMD8 ; if idle state
SD_INIT_ERROR ;
MOV #SD_CARD_ERROR,PC ; ReturnError = $04R1, case of defectuous card (or insufficient SD_POWER_ON clk)
MOV #1,&SD_CMD_FRM+2 ; $(87 AA 01 00 ...) (CRC:CHECK PATTERN:VHS set as 2.7to3.6V:0)
MOV #4800h,&SD_CMD_FRM+4 ; $(87 AA 01 00 00 48)
; ----------------------------------;
-SEND_CMD8 ; CMD8 = SEND_IF_COND; expected R1 response (first byte of SPI R7) = 01h : idle state
+SEND_CMD8 ; SEND_IF_COND; expected R1 response (first byte of SPI R7) = 01h : idle state
; ----------------------------------;
- CALL #sendCommandIdleRet ;X time out occurs with SD_Card V1.x (and all MMC_card)
+ CALL #sendCommandIdleRet ;X time out occurs with SD_Card V1.x (and all MMC_card)
; ----------------------------------;
MOV #4,X ; skip end of SD_Card V2.x type R7 response (4 bytes), because useless
CALL #SPI_X_GET ;WX
; ----------------------------------;
MOV #1,&SD_CMD_FRM ; $(01 00 ... set stop bit
MOV #0,&SD_CMD_FRM+2 ; $(01 00 00 00 ...
-; MOV.B #16,Y ; init 16 * ACMD41 repeats (power on fails with SanDisk ultra 8GB "HC I" and Transcend 2GB)
+; MOV.B #16,Y ; init 16 * ACMD41 repeats (fails with SanDisk ultra 8GB "HC I" and Transcend 2GB)
; MOV.B #32,Y ; init 32 * ACMD41 repeats ==> ~400ms time out
MOV.B #-1,Y ; init 255 * ACMD41 repeats ==> ~3 s time out
MOV #8,S ; preset error 8R1 for ACMD41
ADD S,S ; preset error $10 for CMD16
SEND_CMD16 ; CMD16 = SET_BLOCKLEN
MOV #02h,&SD_CMD_FRM+2 ; $(01 00 02 00 ...)
- MOV #5000h,&SD_CMD_FRM+4 ; $(01 00 02 00 00 50)
+ MOV #5000h,&SD_CMD_FRM+4 ; $(01 00 02 00 00 50)
CALL #WaitIdleBeforeSendCMD ; wait until idle then send CMD16
JNZ SD_INIT_ERROR ; if W = R1 <> 0, ReturnError = $20R1 ; send command ko
; ----------------------------------; W = R1 = 0
SwitchSPIhighSpeed ; end of SD init ==> SD_CLK = SMCLK
; ----------------------------------;
- BIS #1,&SD_CTLW0 ; Software reset
+ BIS #1,&SD_CTLW0 ; UC Software reset
MOV #0,&SD_BRW ; UCxxBRW = 0 ==> SPI_CLK = MCLK
BIC #1,&SD_CTLW0 ; release from reset
; ----------------------------------;
-Read_EBP_FirstSector ; W=0, BS_FirstSectorHL=0
+Read_EBP_FirstSector ; BS_FirstSectorHL=0
; ----------------------------------;
+ MOV #0,W ;
MOV #0,X ;
- CALL #readSectorWX ; read physical first sector
+ CALL #readSectorWX ; read physical first sector, W=0
MOV #SD_BUF,Y ;
- MOV 454(Y),&BS_FirstSectorL ; so, sectors become logical
- MOV 456(Y),&BS_FirstSectorH ;
- MOV.B 450(Y),W ; W = partition ID
+ MOV 454(Y),&BS_FirstSectorL ; so, from here, sectors become logical
+ MOV 456(Y),&BS_FirstSectorH ;
+ MOV.B 450(Y),S ; S = partition ID
; ----------------------------------;
TestPartitionID ;
; ----------------------------------;
- MOV #1,&FATtype ; preset FAT16
-FAT16_CHS_LBA_Test ;
- SUB.B #6,W ; ID=06h Partition FAT16 > 32MB using CHS & LBA ?
- JZ Read_MBR_FirstSector ; W = 0
-FAT16_LBA_Test ;
- SUB.B #8,W ; ID=0Eh Partition FAT16 using LBA ?
- JZ Read_MBR_FirstSector ; W = 0
+ SUB.B #0Ch,S ; ID=0Ch Partition FAT32 using LBA ?
+ JZ Read_MBR_FirstSector ;
+ ADD.B #1,S ; ID=0Bh Partition FAT32 using CHS & LBA ?
+ JZ Read_MBR_FirstSector ;
+ ADD.B #4,S ; ID=07h assigned to FAT 32 by MiniTools Partition Wizard....
+ JZ Read_MBR_FirstSector ;
+ ADD #02007h,S ; set ReturnError = $20 & restore ID value
+ MOV #SD_CARD_ID_ERROR,PC ; see: https://en.wikipedia.org/wiki/Partition_type
; ----------------------------------;
- MOV #2,&FATtype ; set FAT32
-FAT32_LBA_Test ;
- ADD.B #2,W ; ID=0Ch Partition FAT32 using LBA ?
- JZ Read_MBR_FirstSector ; W = 0
-FAT32_CHS_LBA_Test ;
- ADD.B #1,W ; ID=0Bh Partition FAT32 using CHS & LBA ?
- JZ Read_MBR_FirstSector ; W = 0
- ADD.B #4,W ; ID=07h assigned to FAT 32 by MiniTools Partition Wizard....
- JZ Read_MBR_FirstSector ; W = 0
- ADD #0200Bh,W ;
- MOV W,S ;
- MOV #SD_CARD_ID_ERROR,PC ; S = ReturnError = $20xx with xx = partition ID
-; ----------------------------------; see: https://en.wikipedia.org/wiki/Partition_type
Read_MBR_FirstSector ; read first logical sector
-; ----------------------------------; W = 0
- MOV #0,X ;
+; ----------------------------------;
+ MOV #0,X ; W = 0
CALL #readSectorWX ; ...with the good CMD17 bytes/sectors frame ! (good switch FAT16/FAT32)
; ----------------------------------;
FATxx_SetFileSystem ;
; ----------------------------------;
- MOV.B 13(Y),&SecPerClus ;
- MOV 14(Y),X ;3 X = BPB_RsvdSecCnt
+; MOV 44(Y),&DIRClusterL ; init DIRcluster as FAT32 RootDIR
+ MOV #2,&DIRClusterL ; init DIRcluster as FAT32 RootDIR
+; ----------------------------------;
+ MOV 14(Y),X ;3 X = BPB_RsvdSecCnt (05FEh=1534)
MOV X,&OrgFAT1 ;3 set OrgFAT1
- MOV 22(Y),W ; W = BPB_FATsize
- CMP #0,W ; BPB_FATsize <> 0 ?
- JNZ Set_FATsize ; yes
- MOV 36(Y),W ; W = BPB_FATSz32
-Set_FATsize ;
- MOV W,&FATSize ; limited to 16384 sectors....
+; ----------------------------------;
+ MOV 36(Y),W ; no set W = BPB_FATSz32 (1D01h=7425)
+ MOV W,&FATSize ; limited to 32767 sectors....
+; ----------------------------------;
ADD W,X ;
- MOV X,&OrgFAT2 ; X = OrgFAT1 + FATsize = OrgFAT2
- ADD W,X ; X = OrgFAT2 + FATsize = FAT16 OrgRootDir | FAT32 OrgDatas
- CMP #2,&FATtype ; FAT32?
- JZ FATxx_SetFileSystemNext ; yes
-FAT16_SetRootCluster ;
- MOV X,&OrgRootDIR ; only FAT16 use, is a sector used by ComputeClusFrstSect
- ADD #32,X ; OrgRootDir + RootDirSize = OrgDatas
+ MOV X,&OrgFAT2 ; X = OrgFAT1 + FATsize = OrgFAT2 (8959)
+; ----------------------------------;
+ ADD W,X ; X = OrgFAT2 + FATsize = FAT32 OrgDatas (16384)
FATxx_SetFileSystemNext ;
- SUB &SecPerClus,X ; OrgDatas - SecPerClus*2 = OrgClusters
- SUB &SecPerClus,X ; no borrow expected
+ MOV.B 13(Y),Y ; Logical sectors per cluster (8)
+ MOV Y,&SecPerClus ;
+ SUB Y,X ; OrgDatas - SecPerClus*2 = OrgClusters
+ SUB Y,X ; no borrow expected
MOV X,&OrgClusters ; X = virtual cluster 0 address (clusters 0 and 1 don't exist)
- MOV &FATtype,&DIRClusterL ; init DIRcluster as RootDIR
-INI_SD_END ;
- MOV @RSP+,PC ; RET
+INIT_HSD_END ;
+ MOV @RSP+,PC ; RET
;-----------------------------------;
-; ===========================================================
-; Init FORTH SD_Card, called by ?ABORT|RST
-; ===========================================================
-;-----------------------------------;
-INI_FORTH_SD ; common part of ?ABORT|RST
-;-----------------------------------;
- CALL @PC+ ; link to previous INI_FORTH_APP
-RSAB_SD_PFA .word RET_ADR ; which does nothing
-;-----------------------------------;
- MOV #HandlesLen,X ; clear all handles
-ClearHandle SUB #2,X ; 1
- MOV #0,FirstHandle(X) ; 3
- JNZ ClearHandle ; 2
- MOV #0,&CurrentHdl ;
- MOV @RSP+,PC ; RET
-;-----------------------------------;
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