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  1. : _err _sdcDesel ABORT" SDerr" ;

  2. 

  3. ( Tight definition ahead, pre-comment.

  4. 

  5.   Initialize a SD card. This should be called at least 1ms

  6.   after the powering up of the card. We begin by waking up the

  7.   SD card. After power up, a SD card has to receive at least

  8.   74 dummy clocks with CS and DI high. We send 80.

  9.   Then send cmd0 for a maximum of 10 times, success is when

  10.   we get 0x01. Then comes the CMD8. We send it with a 0x01aa

  11.   argument and expect a 0x01aa argument back, along with a

  12.   0x01 R1 response. After that, we need to repeatedly run

  13.   CMD55+CMD41 (0x40000000) until the card goes out of idle

  14.   mode, that is, when it stops sending us 0x01 response and

  15.   send us 0x00 instead. Any other response means that

  16.   initialization failed. )