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1a6a549857
Working on programming AVR chips exposes a glaring omission in my first design of the SPI Relay: not allowing multiple devices make this task hard. I constantly have to unplug my SD card before, plug the AVR chip holder, then play a bit, then unplug the AVR holder, then replug the SD card... My prototype for a SPI relay design is built, but I haven't tested it yet. I need to adapt the code first, which is what I do here. When the prototype is tested, I'll update the SDC recipe with a new schema.
17 lines
504 B
Plaintext
17 lines
504 B
Plaintext
: _sdc! ( srcaddr blkno -- )
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[ SDC_DEVID LITN ] (spie)
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0x58 ( CMD24 ) 0 ROT ( a cmd 0 blkno ) _cmd
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IF _err THEN
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_idle DROP 0xfe (spix) DROP 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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(spix) DROP ( a crc )
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SWAP ( crc a )
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LOOP
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DROP ( crc ) 256 /MOD ( lsb msb )
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(spix) DROP (spix) DROP
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_wait DROP 0 (spie) ;
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