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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.
16 lines
481 B
Plaintext
16 lines
481 B
Plaintext
: _sdc@ ( dstaddr blkno -- )
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(spie) 0x51 ( CMD17 ) 0 ROT ( a cmd 0 blkno ) _cmd
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IF _err THEN
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_wait 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 _idle ( crc a a n )
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DUP ROT C! ( crc a n )
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ROT SWAP _crc16 ( a crc )
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SWAP 1+ ( crc a+1 )
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LOOP
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DROP ( crc1 )
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_idle 8 LSHIFT _idle + ( crc2 )
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_wait DROP (spid)
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= NOT IF _err THEN ;
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