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collapseos/blk/380

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2020-04-24 03:55:00 +10:00
: _err _sdcDesel ABORT" SDerr" ;
( Initialize a SD card. This should be called at least 1ms
after the powering up of the card. )
: SDC$
( Wake the SD card up. After power up, a SD card has to receive
at least 74 dummy clocks with CS and DI high. We send 80. )
10 0 DO _idle DROP LOOP
( call cmd0 and expect a 0x01 response (card idle)
this should be called multiple times. we're actually
expected to. let's call this for a maximum of 10 times. )
0 ( dummy )
10 0 DO ( r )
DROP 0x40 0 0 SDCMDR1 ( CMD0 )
DUP 0x01 = IF LEAVE THEN
LOOP 0x01 = NOT IF _err THEN ( cont. )