; forthMSP430FR_SD_INIT.asm
.save
.listing off
-; http://patorjk.com/software/taag/#p=display&f=Banner&t=Fast Forth
-
-; Fast Forth For Texas Instrument MSP430FRxxxx FRAM devices
-; Copyright (C) <2017> <J.M. THOORENS>
-;
-; This program is free software: you can redistribute it and/or modify
-; it under the terms of the GNU General Public License as published by
-; the Free Software Foundation, either version 3 of the License, or
-; (at your option) any later version.
-;
-; This program is distributed in the hope that it will be useful,
-; but WITHOUT ANY WARRANTY; without even the implied warranty of
-; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-; GNU General Public License for more details.
-;
-; You should have received a copy of the GNU General Public License
-; along with this program. If not, see <http://www.gnu.org/licenses/>.
-
; ===========================================================
; ABOUT INIT SD_CARD AND HOW TO SELECT FAT16/FAT32 FORMAT
; ===========================================================
; OrgDatas = OrgRootDir + RootDirSize = 30336
; FirstSectorOfCluster(n) = OrgCluster + n*BPB_SecPerClus ==> cluster(6) = 30368
+ .restore
+
; ===========================================================
-; Init SD_Card
+; Init hardware SD_Card, called by WARM
; ===========================================================
- .restore
+;-----------------------------------;
+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.
+;-----------------------------------;
+ CMP #0,TOS ; RSTIV_MEM = WARM ?
+ JZ INI_SD_END ; no init if RSTIV_MEM = WARM
+;-----------------------------------;
+ BIT.B #CD_SD,&SD_CDIN ; SD_memory in SD_Card module ?
+ JNZ INI_SD_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
+ 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
+ClearSDdata SUB #2,X ; 1
+ MOV #0,SD_ORG(X) ; 3
+ JNZ ClearSDdata ; 2
+ .ENDIF ;
+;-----------------------------------;
SD_POWER_ON
+; ----------------------------------;
MOV #8,X ; send 64 clk on SD_clk
CALL #SPI_X_GET ;
BIC.B #CS_SD,&SD_CSOUT ; preset Chip Select output low to switch in SPI mode
- MOV #4,S ; preset error 4R1
; ----------------------------------;
INIT_CMD0 ; all SD area is 0 filled
; ----------------------------------;
+ 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.B #16,Y ; init 16 * ACMD41 repeats (power on 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
; ----------------------------------;
SEND_ACMD41 ; send CMD55+CMD41
; ----------------------------------;
- 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; expected SPI_R1 response = 1 : idle
JZ SetBLockLength ; if SD_Card ready (R1=0)
SUB.B #1,Y ; else decr time out delay
JNZ INIT_CMD55 ; then loop back while count of repeat not reached
- JMP SD_INIT_ERROR ; ReturnError on time out : unusable card
+ JMP SD_INIT_ERROR ; ReturnError on time out : unusable card (or insufficient Vdd SD)
; ----------------------------------;
setBLockLength ; set block = 512 bytes (buffer size), usefull only for FAT16 SD Cards
; ----------------------------------;
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
-; ----------------------------------;
-SetHighSpeed ; end of SD init ==> SD_CLK = SMCLK
+; ----------------------------------; W = R1 = 0
+SwitchSPIhighSpeed ; end of SD init ==> SD_CLK = SMCLK
; ----------------------------------;
BIS #1,&SD_CTLW0 ; Software reset
MOV #0,&SD_BRW ; UCxxBRW = 0 ==> SPI_CLK = MCLK
; ----------------------------------;
Read_EBP_FirstSector ; W=0, BS_FirstSectorHL=0
; ----------------------------------;
- CALL #readSectorW ; read physical first sector
+ MOV #0,X ;
+ CALL #readSectorWX ; read physical first sector
MOV #SD_BUF,Y ;
MOV 454(Y),&BS_FirstSectorL ; so, sectors become logical
MOV 456(Y),&BS_FirstSectorH ;
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 CMD17 bytes/sectors frame ! (good switch FAT16/FAT32)
+; ----------------------------------; W = 0
+ MOV #0,X ;
+ CALL #readSectorWX ; ...with the good CMD17 bytes/sectors frame ! (good switch FAT16/FAT32)
; ----------------------------------;
FATxx_SetFileSystem ;
; ----------------------------------;
SUB &SecPerClus,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 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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