mirror of
https://github.com/hsoft/collapseos.git
synced 2024-11-21 02:28:05 +11:00
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 -- )
|
|
[ SDC_DEVID LITN ] (spie)
|
|
0x51 ( CMD17 ) 0 ROT ( a cmd 0 blkno ) _cmd
|
|
IF _err THEN
|
|
_wait 0xfe = NOT IF _err THEN
|
|
0 SWAP ( crc a )
|
|
512 0 DO ( crc a )
|
|
DUP _idle ( crc a a n )
|
|
DUP ROT C! ( crc a n )
|
|
ROT SWAP _crc16 ( a crc )
|
|
SWAP 1+ ( crc a+1 )
|
|
LOOP
|
|
DROP ( crc1 )
|
|
_idle 8 LSHIFT _idle + ( crc2 )
|
|
_wait DROP 0 (spie)
|
|
= NOT IF _err THEN ;
|