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drv/sdc: Implement "SDC@" as a BLK@ word

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"0 LIST" in the RC2014 emulator w/ SD card works!
This commit is contained in:
Virgil Dupras 2020-04-18 17:06:57 -04:00
parent f3c92684a0
commit 47a7133b8b
1 changed files with 21 additions and 9 deletions
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30
drv/sdc.fs
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@ -87,7 +87,7 @@
( send CRC )
0x01 OR ( ensure stop bit )
_sdcSR DROP
( And now we just have to wait for a valid response... )
( And now we just have to wait for a valid response... )
_wait
;
@ -118,7 +118,7 @@
send 80. )
10 0 DO 0xff SDC_SPI PC! LOOP
( call cmd0 and expect a 0x01 response (card idle)
( call cmd0 and expect a 0x01 response (card idle)
this should be called multiple times. we're actually
expected to. let's call this for a maximum of 10 times. )
0 ( dummy )
@ -130,7 +130,7 @@
LOOP
0x01 = NOT IF 1 EXIT THEN
( Then comes the CMD8. We send it with a 0x01aa argument
( Then comes the CMD8. We send it with a 0x01aa argument
and expect a 0x01aa argument back, along with a 0x01 R1
response. )
0b01001000 0 0x1aa ( CMD8 )
@ -139,7 +139,7 @@
0 = NOT IF 3 EXIT THEN ( arg1 check )
0x01 = NOT IF 4 EXIT THEN ( r check )
( Now we need to repeatedly run CMD55+CMD41 (0x40000000)
( Now we need to repeatedly run CMD55+CMD41 (0x40000000)
until the card goes out of idle mode, that is, when
it stops sending us 0x01 response and send us 0x00
instead. Any other response means that initialization
@ -156,15 +156,20 @@
0
;
( dstaddr blkno -- f )
: SDC@
: _err
_desel
ABORT" SDC error"
;
( dstaddr blkno -- )
: _sdc@
_sel
0x51 ( CMD17 )
0 ROT ( a cmd 0 blkno )
_cmd
IF _desel 0 EXIT THEN
IF _err THEN
_wait
0xfe = NOT IF _desel 0 EXIT THEN
0xfe = NOT IF _err THEN
0 SWAP ( crc a )
512 0 DO ( crc a )
DUP ( crc a a )
@ -180,5 +185,12 @@
_idle + ( crc2 )
_wait DROP
_desel
= ( success if crc1 == crc2 )
= NOT IF _err THEN
;
: SDC@
2 * DUP BLK( SWAP ( b a b )
_sdc@
1+ BLK( 512 + SWAP
_sdc@
;