BIC.B #007h,&P2REN ; disable pullup resistors for SIMO/SOMI/SCK pins
.ENDIF
-; .IFDEF MSP_EXP430FR4133
-;
-;; COLD default state : Px{DIR,SEL0,SEL1,SELC,IE,IFG,IV} = 0 ; PX{OUT,REN} = 1 ; Px{IN,IES} = ?
-;
-;; P8.0 <--- SD_CD (Card Detect)
-;SD_CD .equ 1
-;SD_CDIN .equ P8IN
-;; P8.1 ---> SD_CS (Card Select)
-;SD_CS .equ 2
-;SD_CSOUT .equ P8OUT
-; BIS.B #SD_CS,&P8DIR ; SD_CS output high
-;
-;; P5.1 UCB0 CLK ---> SD_CLK
-;; P5.2 UCB0 TX/SIMO ---> SD_SDI
-;; P5.3 UCB0 RX/SOMI <--- SD_SDO
-; BIS.B #00Eh,&P5SEL1 ; Configure UCB0 pins P5.1 as CLK, P5.2 as SIMO & P5.3 as SOMI
-; ; P2DIR.x is controlled by eUSCI_A0 module
-; BIC.B #00Eh,&P5REN ; disable pullup resistors for SIMO/SOMI/SCK pins
-;
-; .ENDIF
+ .IFDEF MSP_EXP430FR4133
+
+; COLD default state : Px{DIR,SEL0,SEL1,SELC,IE,IFG,IV} = 0 ; PX{OUT,REN} = 1 ; Px{IN,IES} = ?
+
+; P8.0 <--- SD_CD (Card Detect)
+SD_CD .equ 1
+SD_CDIN .equ P8IN
+; P8.1 ---> SD_CS (Card Select)
+SD_CS .equ 2
+SD_CSOUT .equ P8OUT
+ BIS.B #SD_CS,&P8DIR ; SD_CS output high
+
+; P5.1 UCB0 CLK ---> SD_CLK
+; P5.2 UCB0 TX/SIMO ---> SD_SDI
+; P5.3 UCB0 RX/SOMI <--- SD_SDO
+ BIS.B #00Eh,&P5SEL0 ; Configure UCB0 pins P5.1 as CLK, P5.2 as SIMO & P5.3 as SOMI
+ ; P2DIR.x is controlled by eUSCI_A0 module
+ BIC.B #00Eh,&P5REN ; disable pullup resistors for SIMO/SOMI/SCK pins
+
+ .ENDIF
.IFDEF CHIPSTICK_FR2433
; COLD default state : Px{DIR,SEL0,SEL1,SELC,IE,IFG,IV} = 0 ; PX{OUT,REN} = 1 ; Px{IN,IES} = ?
BIC.B #00Eh,&P1REN ; disable pullup resistors for SIMO/SOMI/SCK pins
.ENDIF
- .IFDEF MY_MSP430FR5738
-
-; COLD default state : Px{DIR,SEL0,SEL1,SELC,IE,IFG,IV} = 0 ; PX{OUT,REN} = 1 ; Px{IN,IES} = ?
-
-; P2.3 as SD_CD
-SD_CD .equ 08h
-SD_CDIN .equ P2IN
-; P2.4 as SD_CS
-SD_CS .equ 10h
-SD_CSOUT .equ P2OUT
- BIS.B #SD_CS,&P2DIR ; SD_CS output high
-
-; P2.2/UCB0CLK ---> SD_CardAdapter CLK (SCK) default value
-; P1.6/UCB0SIMO/UCB0SDA/TA0.0 ---> SD_CardAdapter SDI (MOSI) default value
-; P1.7/UCB0SOMI/UCB0SCL/TA1.0 <--- SD_CardAdapter SDO (MISO) default value
- BIS #04C0h,&PASEL1 ; Configure UCB0 pins P2.2 as UCB0CLK, P1.6 as UCB0SIMO & P1.7 as UCB0SOMI
- ; P2DIR.x is controlled by eUSCI_B0 module
- BIC #04C0h,&PAREN ; disable pullup resistors for SIMO/SOMI/CLK pins
-
- .ENDIF
- .IFDEF MY_MSP430FR5738_1
-
-; COLD default state : Px{DIR,SEL0,SEL1,SELC,IE,IFG,IV} = 0 ; PX{OUT,REN} = 1 ; Px{IN,IES} = ?
-
-; P2.3 as SD_CD
-SD_CD .equ 08h
-SD_CDIN .equ P2IN
-; P2.4 as SD_CS
-SD_CS .equ 10h
-SD_CSOUT .equ P2OUT
- BIS.B #SD_CS,&P2DIR ; SD_CS output high
-
-; P2.2/UCB0CLK ---> SD_CardAdapter CLK (SCK) default value
-; P1.6/UCB0SIMO/UCB0SDA/TA0.0 ---> SD_CardAdapter SDI (MOSI) default value
-; P1.7/UCB0SOMI/UCB0SCL/TA1.0 <--- SD_CardAdapter SDO (MISO) default value
- BIS #04C0h,&PASEL1 ; Configure UCB0 pins P2.2 as UCB0CLK, P1.6 as UCB0SIMO & P1.7 as UCB0SOMI
- ; P2DIR.x is controlled by eUSCI_B0 module
- BIC #04C0h,&PAREN ; disable pullup resistors for SIMO/SOMI/CLK pins
-
- .ENDIF
- .IFDEF MY_MSP430FR5948
-
-; COLD default state : Px{DIR,SEL0,SEL1,SELC,IE,IFG,IV} = 0 ; PX{OUT,REN} = 1 ; Px{IN,IES} = ?
-
-; P2.3 <--- SD_CD (Card Detect)
-SD_CD .equ 08h
-SD_CDIN .equ P2IN
-; P2.7 ---> SD_CS (Card Select)
-SD_CS .equ 80h
-SD_CSOUT .equ P2OUT
- BIS.B #SD_CS,&P2DIR ; SD_CS output high
-
-; P2.4 UCA1 CLK ---> SD_CLK
-; P2.5 UCA1 TX/SIMO ---> SD_SDI
-; P2.6 UCA1 RX/SOMI <--- SD_SDO
- BIS.B #070h,&P2SEL1 ; Configure UCA1 pins P2.4 as UCA1CLK, P2.5 as UCA1SIMO & P2.6 as UCA1SOMI
- ; P2DIR.x is controlled by eUSCI_A0 module
- BIC.B #070h,&P2REN ; disable pullup resistors for SIMO/SOMI/SCK pins
-
- .ENDIF
- .IFDEF MY_MSP430FR5948_1 ; = new version of MY_MSP430FR5948
-
-; COLD default state : Px{DIR,SEL0,SEL1,SELC,IE,IFG,IV} = 0 ; PX{OUT,REN} = 1 ; Px{IN,IES} = ?
-
-; P2.7 ---> SD_CD (Card Detect)
-SD_CD .equ 80h
-SD_CDIN .equ P2IN
-; P2.3 <--- SD_CS (Card Select)
-SD_CS .equ 08h
-SD_CSOUT .equ P2OUT
- BIS.B #SD_CS,&P2DIR ; SD_CS output high
-
-; P2.4 UCA1 CLK ---> SD_CLK
-; P2.5 UCA1 TX/SIMO ---> SD_SDI
-; P2.6 UCA1 RX/SOMI <--- SD_SDO
- BIS.B #070h,&P2SEL1 ; Configure UCA1 pins P2.4 as UCA1CLK, P2.5 as UCA1SIMO & P2.6 as UCA1SOMI
- ; P2DIR.x is controlled by eUSCI_A0 module
- BIC.B #070h,&P2REN ; disable pullup resistors for SIMO/SOMI/SCK pins
-
- .ENDIF
BIC #1,&SD_CTLW0 ; release eUSCI from reset
; ===========================================================
-; 2- Init all SD_Card variables, handles and SDIB buffer to 0
+; 2- Init to 0 all SD_Card variables, handles and SDIB buffer
; ===========================================================
InitSDdata
SD_POWER_ON
MOV #8,X ; send 64 clk on SD_clk
CALL #SPI_X_GET ;
- BIC.B #SD_CS,&SD_CSOUT ; set SD_CS output low to switch in SPI mode
+ BIC.B #SD_CS,&SD_CSOUT ; preset SD_CS output low to switch in SPI mode
MOV #4,S ; preset error 4R1
-SEND_CMD0 ; CMD0 : GO_IDLE_STATE
+; ----------------------------------;
+INIT_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
+; ----------------------------------;
+SEND_CMD0 ; CMD0 : GO_IDLE_STATE
+; ----------------------------------;
MOV #1,W ; expected SPI_R1 response = 1 = idle state
CALL #sendCommand ;X
JZ INIT_CMD8 ; if idle state
CALL #SPI_GET ; (needed to pass SanDisk ultra 8GB "HC I")
CMP.B #-1,W ; FFh expected value <==> MISO = high level
JNE INIT_CMD8 ; loop back while yet busy
-; ----------------------------------;
- MOV #8,S ; preset error 8R1 for CMD1
MOV #0AA87h,&SD_CMD_FRM ; $(87 AA ...) (CRC:CHECK PATTERN)
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
+; ----------------------------------;
MOV #1,W ; expected R1 response (first byte of SPI R7) = 01h : idle state
- CALL #sendCommand ;
+ CALL #sendCommand ; time out occurs with SD_Card V1.x (and all MMC_card)
; ----------------------------------;
-CMD8_NEXT ; time out occured with SD_Card V1.x and all MMC_card
- MOV #4,X ;
- CALL #SPI_X_GET ;WX skip end of SD_Card V2.x type R7 response (4 bytes)
+ MOV #4,X ; skip end of SD_Card V2.x type R7 response (4 bytes), because useless
+ CALL #SPI_X_GET ;WX
+; ----------------------------------;
+INIT_ACMD41 ;
; ----------------------------------;
MOV #1,&SD_CMD_FRM ; $(01 00 ... set stop bit
MOV #0,&SD_CMD_FRM+2 ; $(01 00 00 00 ...
; MOV.B #32,Y ; init 32 * ACMD41 repeats ==> ~400ms
MOV.B #-1,Y ; init 255 * ACMD41 repeats ==> 3 s
; ----------------------------------;
-SEND_ACMD41 ; (CMD55+CMD41)
+SEND_ACMD41 ; send CMD55+CMD41
; ----------------------------------;
- ADD S,S ; preset error 10R1 for ACMD41
-SEND_CMD55 ; CMD55 = APP_CMD
+ MOV #8,S ; preset error 8R1 for ACMD41
+INIT_CMD55 ;
MOV #7700h,&SD_CMD_FRM+4 ; $(01 00 00 00 00 77)
+SEND_CMD55 ; CMD55 = APP_CMD
MOV #1,W ; expected R1 response = 1 : idle
CALL #sendCommand ;
SEND_CMD41 ; CMD41 = APP OPERATING CONDITION
MOV #6940h,&SD_CMD_FRM+4 ; $(01 00 00 00 40 69) (30th bit = HCS = High Capacity Support request)
- CALL #SDbusyLoop ; wait until busy (needed to pass SanDisk ultra 8GB "HC I") then send Command CMD41
+ CALL #WaitIdleBeforeSendCMD ; wait until idle (needed to pass SanDisk ultra 8GB "HC I") then send Command CMD41
JZ SetBLockLength ; if SD_Card ready (R1=0)
SUB.B #1,Y ; else decr time out delay
- JNZ SEND_CMD55 ; then loop back while count of repeat not reached
+ JNZ INIT_CMD55 ; then loop back while count of repeat not reached
JMP SD_INIT_ERROR ; ReturnError on time out : unusable card
; ----------------------------------;
-setBLockLength ; set block = 512 bytes (buffer size), usefull for FAT16 SD Cards
+setBLockLength ; set block = 512 bytes (buffer size), usefull only for FAT16 SD Cards
; ----------------------------------;
- ADD S,S ; preset error $20 for CMD16
+ 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)
- CALL #SDbusyLoop ; wait until busy then send CMD16
+ CALL #WaitIdleBeforeSendCMD ; wait until idle then send CMD16
JNZ SD_INIT_ERROR ; if W = R1 <> 0, ReturnError = $20R1 ; send command ko
; ----------------------------------;
SetHighSpeed ; end of SD init ==> SD_CLK = SMCLK
; ----------------------------------;
Read_EBP_FirstSector ; W=0, BS_FirstSectorHL=0
; ----------------------------------;
- ADD S,S ; preset error $40 ; SD card not FAT16/FAT32
CALL #readSectorW ; read physical first sector
MOV #BUFFER,Y ;
- MOV 454(Y),&BS_FirstSectorL ;
- MOV 456(Y),&BS_FirstSectorH ;
+ MOV 454(Y),&BS_FirstSectorL ; so, sectors become logical
+ MOV 456(Y),&BS_FirstSectorH ;
MOV.B 450(Y),W ; W = partition ID
; ----------------------------------;
TestPartitionID ;
MOV #1,&FATtype ; preset FAT16
FAT16_CHS_LBA_Test ;
SUB.B #6,W ; ID=06h Partition FAT16 using CHS & LBA ?
- JZ Read_MBR_FirstSector ;
+ JZ Read_MBR_FirstSector ; with W = 0
FAT16_LBA_Test ;
SUB.B #8,W ; ID=0Eh Partition FAT16 using LBA ?
- JZ Read_MBR_FirstSector ;
+ JZ Read_MBR_FirstSector ; with W = 0
; ----------------------------------;
MOV #2,&FATtype ; set FAT32
FAT32_LBA_Test ;
ADD.B #2,W ; ID=0Ch Partition FAT32 using LBA ?
- JZ Read_MBR_FirstSector ;
+ JZ Read_MBR_FirstSector ; with W = 0
FAT32_CHS_LBA_Test ;
ADD.B #1,W ; ID=0Bh Partition FAT32 using CHS & LBA ?
- JZ Read_MBR_FirstSector ;
- ADD.B #0Bh,W
- JNZ SD_INIT_ERROR ; ReturnError = $40xx with xx = partition ID
-; ----------------------------------;
-Read_MBR_FirstSector ; W=0
+ JZ Read_MBR_FirstSector ; with 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
; ----------------------------------;
- CALL #readSectorW ; ...with the good bytes/sectors (FAT16/FAT32) CMD17 frame !
+ CALL #readSectorW ; ...with the good CMD17 bytes/sectors (FAT16/FAT32) frame !
; ----------------------------------;
FATxx_SetFileSystem ;
; ----------------------------------;
MOV 14(Y),X ;3 X = BPB_RsvdSecCnt
MOV X,&OrgFAT1 ;3 set OrgFAT1
MOV 22(Y),W ; W = BPB_FATsize
- CMP #0,W ; BPB_FATsize = 0 ?
- JNZ Set_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....
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