mirror of https://github.com/hsoft/collapseos.git
17 lines
640 B
Plaintext
17 lines
640 B
Plaintext
: _err _sdcDesel ABORT" SDerr" ;
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( Initialize a SD card. This should be called at least 1ms
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after the powering up of the card. )
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: SDC$
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( Wake the SD card up. After power up, a SD card has to receive
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at least 74 dummy clocks with CS and DI high. We send 80. )
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10 0 DO _idle DROP LOOP
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( call cmd0 and expect a 0x01 response (card idle)
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this should be called multiple times. we're actually
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expected to. let's call this for a maximum of 10 times. )
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0 ( dummy )
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10 0 DO ( r )
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DROP 0x40 0 0 SDCMDR1 ( CMD0 )
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DUP 0x01 = IF LEAVE THEN
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LOOP 0x01 = NOT IF _err THEN ( cont. )
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