mirror of
https://github.com/hsoft/collapseos.git
synced 2024-12-26 04:08:06 +11:00
17 lines
640 B
Plaintext
17 lines
640 B
Plaintext
|
: _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. )
|