mirror of
https://github.com/hsoft/collapseos.git
synced 2024-09-06 23:48:44 +10:00
124da6adec
Although the SPI Relay driver is RC2014-specific, the SD Card driver is generic enough to be a subsystem. That's the second subsystem we add and this warrants, I think, the formalization of a new concept: protocols.
17 lines
493 B
Plaintext
17 lines
493 B
Plaintext
: _sdc! ( srcaddr blkno -- )
|
|
(spie) 0x58 ( CMD24 ) 0 ROT ( a cmd 0 blkno ) _cmd
|
|
IF _err THEN
|
|
_idle DROP 0xfe (spix) DROP
|
|
0 SWAP ( crc a )
|
|
512 0 DO ( crc a )
|
|
C@+ ( crc a+1 n )
|
|
ROT OVER ( a n crc n )
|
|
_crc16 ( a n crc )
|
|
SWAP ( a crc n )
|
|
(spix) DROP ( a crc )
|
|
SWAP ( crc a )
|
|
LOOP
|
|
DROP ( crc ) 256 /MOD ( lsb msb )
|
|
(spix) DROP (spix) DROP
|
|
_wait DROP (spid) ;
|