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29a6ee128d
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29a6ee128d | ||
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a70366aa43 | ||
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f3c92684a0 |
4
blk/038
4
blk/038
@ -2,8 +2,8 @@
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FORGET x -- Rewind the dictionary (both CURRENT and HERE)
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up to x's previous entry.
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PREV a -- a Return a wordref's previous entry.
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WHLEN a -- n Get word header length from wordref. That is,
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name length + 3. a is a wordref
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WORD( a -- a Get wordref's beginning addr.
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89
drv/sdc.fs
89
drv/sdc.fs
@ -1,12 +1,3 @@
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: SDC_CSHIGH 6 ;
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: SDC_CSLOW 5 ;
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: SDC_SPI 4 ;
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: _sdcSR SDC_SPI PC! SDC_SPI PC@ ;
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: _sel 0 SDC_CSLOW PC! ;
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: _desel 0 SDC_CSHIGH PC! ;
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( -- n )
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: _idle 0xff _sdcSR ;
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@ -93,30 +84,31 @@
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( cmd arg1 arg2 -- r )
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( Send a command that expects a R1 response, handling CS. )
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: SDCMDR1 _sel _cmd _desel ;
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: SDCMDR1 _sdcSel _cmd _sdcDesel ;
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( cmd arg1 arg2 -- r arg1 arg2 )
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( Send a command that expects a R7 response, handling CS. A R7
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is a R1 followed by 4 bytes. arg1 contains bytes 0:1, arg2
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has 2:3 )
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: SDCMDR7
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_sel
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_sdcSel
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_cmd ( r )
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_idle 256 * ( r h )
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_idle + ( r arg1 )
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_idle 256 * ( r arg1 h )
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_idle + ( r arg1 arg2 )
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_desel
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_sdcDesel
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;
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: _err _sdcDesel ABORT" SDerr" ;
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( Initialize a SD card. This should be called at least 1ms
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after the powering up of the card. r is result.
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Zero means success, non-zero means error. )
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after the powering up of the card. )
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: SDC$
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( Wake the SD card up. After power up, a SD card has to
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receive at least 74 dummy clocks with CS and DI high. We
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send 80. )
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10 0 DO 0xff SDC_SPI PC! LOOP
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10 0 DO _idle DROP LOOP
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( call cmd0 and expect a 0x01 response (card idle)
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this should be called multiple times. we're actually
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@ -128,16 +120,16 @@
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SDCMDR1
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DUP 0x01 = IF LEAVE THEN
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LOOP
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0x01 = NOT IF 1 EXIT THEN
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0x01 = NOT IF _err THEN
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( Then comes the CMD8. We send it with a 0x01aa argument
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and expect a 0x01aa argument back, along with a 0x01 R1
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response. )
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0b01001000 0 0x1aa ( CMD8 )
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SDCMDR7 ( r arg1 arg2 )
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0x1aa = NOT IF 2 EXIT THEN ( arg2 check )
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0 = NOT IF 3 EXIT THEN ( arg1 check )
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0x01 = NOT IF 4 EXIT THEN ( r check )
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0x1aa = NOT IF _err THEN ( arg2 check )
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0 = NOT IF _err THEN ( arg1 check )
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0x01 = NOT IF _err THEN ( r check )
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( Now we need to repeatedly run CMD55+CMD41 (0x40000000)
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until the card goes out of idle mode, that is, when
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@ -147,24 +139,23 @@
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BEGIN
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0b01110111 0 0 ( CMD55 )
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SDCMDR1
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0x01 = NOT IF 5 EXIT THEN
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0x01 = NOT IF _err THEN
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0b01101001 0x4000 0x0000 ( CMD41 )
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SDCMDR1
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DUP 0x01 > IF DROP 6 EXIT THEN
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DUP 0x01 > IF _err THEN
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NOT UNTIL
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( Out of idle mode! Success! )
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0
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;
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( dstaddr blkno -- f )
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: SDC@
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_sel
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( dstaddr blkno -- )
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: _sdc@
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_sdcSel
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0x51 ( CMD17 )
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0 ROT ( a cmd 0 blkno )
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_cmd
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IF _desel 0 EXIT THEN
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IF _err THEN
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_wait
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0xfe = NOT IF _desel 0 EXIT THEN
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0xfe = NOT IF _err THEN
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0 SWAP ( crc a )
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512 0 DO ( crc a )
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DUP ( crc a a )
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@ -179,6 +170,46 @@
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_idle 256 *
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_idle + ( crc2 )
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_wait DROP
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_desel
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= ( success if crc1 == crc2 )
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_sdcDesel
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= NOT IF _err THEN
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;
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: SDC@
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2 * DUP BLK( SWAP ( b a b )
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_sdc@
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1+ BLK( 512 + SWAP
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_sdc@
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;
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( srcaddr blkno -- )
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: _sdc!
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_sdcSel
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0x58 ( CMD24 )
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0 ROT ( a cmd 0 blkno )
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_cmd
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IF _err THEN
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_idle DROP
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0xfe _sdcSR DROP
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0 SWAP ( crc a )
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512 0 DO ( crc a )
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C@+ ( crc a+1 n )
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ROT OVER ( a n crc n )
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_crc16 ( a n crc )
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SWAP ( a crc n )
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_sdcSR DROP ( a crc )
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SWAP ( crc a )
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LOOP
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DROP ( crc )
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256 /MOD ( lsb msb )
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_sdcSR DROP ( lsb )
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_sdcSR DROP
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_wait DROP
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_sdcDesel
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;
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: SDC!
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2 * DUP BLK( SWAP ( b a b )
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_sdc!
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1+ BLK( 512 + SWAP
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_sdc!
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;
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21
drv/sdc.z80
Normal file
21
drv/sdc.z80
Normal file
@ -0,0 +1,21 @@
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( n -- n )
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( Initiate SPI exchange with the SD card. n is the data to
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send. )
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CODE _sdcSR
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HL POPqq,
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chkPS,
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A L LDrr,
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SDC_SPI OUTnA,
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NOP, NOP,
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SDC_SPI INAn,
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L A LDrr,
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HL PUSHqq,
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;CODE
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CODE _sdcSel
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SDC_CSLOW OUTnA,
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;CODE
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CODE _sdcDesel
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SDC_CSHIGH OUTnA,
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;CODE
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@ -183,7 +183,6 @@ void sdc_spi_wr(SDC *sdc, uint8_t val)
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return;
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}
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if (cmd == 24) {
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fprintf(stderr, "cmd24\n");
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if (sdc->fp) {
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fseek(sdc->fp, arg2*512, SEEK_SET);
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}
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@ -58,9 +58,9 @@
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( During a CASE, the stack grows by 1 at each ENDOF so that
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we can fill all those ENDOF branching addrs. So that we
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know when to stop, we put a 0 on PSP. That's our stopgap. )
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: CASE 0 ; IMMEDIATE
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: CASE 0 COMPILE >R ; IMMEDIATE
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: OF
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COMPILE OVER COMPILE =
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COMPILE I COMPILE =
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[COMPILE] IF
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; IMMEDIATE
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: ENDOF [COMPILE] ELSE ; IMMEDIATE
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@ -70,10 +70,11 @@
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hit 0. )
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: ENDCASE
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BEGIN
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DUP NOT IF DROP EXIT THEN
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DUP NOT IF
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DROP COMPILE R> COMPILE DROP EXIT
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THEN
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[COMPILE] THEN
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AGAIN
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COMPILE DROP
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; IMMEDIATE
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: CREATE
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@ -154,17 +155,18 @@
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- ( a-o )
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;
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: WHLEN
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1- C@ ( name len field )
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: WORD(
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DUP 1- C@ ( name len field )
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127 AND ( 0x7f. remove IMMEDIATE flag )
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3 + ( fixed header len )
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-
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;
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: FORGET
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' DUP ( w w )
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( HERE must be at the end of prev's word, that is, at the
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beginning of w. )
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DUP WHLEN - HERE ! ( w )
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WORD( HERE ! ( w )
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PREV CURRENT !
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;
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@ -39,9 +39,6 @@
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1+
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;
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( Get word addr, starting at name's address )
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: '< ' DUP WHLEN - ;
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( Relink atom at a, applying offset o with limit ol.
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Returns a, appropriately skipped.
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)
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@ -127,6 +124,10 @@
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The output of this word is 3 numbers: top copied address,
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top copied CURRENT, and then the beginning of the copied dict
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at the end to indicate that we're finished processing.
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Note that the last word is always skipped because it's not
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possible to reliably detect its end. If you need that last
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word, define a dummy word before calling RLDICT.
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)
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( target -- )
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: RLDICT
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@ -142,7 +143,7 @@
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( H@+2 == offset )
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H@ 2+ ! ( )
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( We have our offset, now let's copy our memory chunk )
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H@ @ DUP WHLEN - ( src )
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H@ @ WORD( ( src )
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DUP H@ -^ ( src u )
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DUP ROT SWAP ( u src u )
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H@ 4 + ( u src u dst )
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@ -154,9 +155,9 @@
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offset by u+4. +4 before, remember, we're using 4 bytes
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as variable space. )
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4 + ( u+4 )
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DUP H@ + ( u we )
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DUP CURRENT @ WORD( + ( u we )
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DUP .X CRLF
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SWAP CURRENT @ + ( we wr )
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SWAP CURRENT @ PREV + ( we wr )
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DUP .X CRLF
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BEGIN ( we wr )
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DUP ROT ( wr wr we )
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@ -169,7 +170,7 @@
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DUP ( wr wr )
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PREV ( oldwr newwr )
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SWAP ( wr oldwr )
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DUP WHLEN - ( wr we )
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WORD( ( wr we )
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SWAP ( we wr )
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( Are we finished? We're finished if wr-4 <= H@ )
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DUP 4 - H@ <=
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@ -10,6 +10,7 @@ BOOTSRCS = conf.fs \
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$(FDIR)/boot.fs \
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$(FDIR)/z80c.fs \
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$(BASEDIR)/drv/acia.z80 \
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$(BASEDIR)/drv/sdc.z80 \
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$(FDIR)/icore.fs \
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$(EDIR)/xstop.fs
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@ -2,5 +2,8 @@
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0xf000 CONSTANT RS_ADDR
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0x80 CONSTANT ACIA_CTL
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0x81 CONSTANT ACIA_IO
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4 CONSTANT SDC_SPI
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5 CONSTANT SDC_CSLOW
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6 CONSTANT SDC_CSHIGH
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RAMSTART 0x70 + CONSTANT ACIA_MEM
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