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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
506 B
Plaintext
17 lines
506 B
Plaintext
: _sdc@ ( dstaddr blkno -- )
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[ SDC_DEVID LITN ] (spie)
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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 0 (spie)
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= NOT IF _err THEN ;
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