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124da6adec
Although the SPI Relay driver is RC2014-specific, the SD Card driver is generic enough to be a subsystem. That's the second subsystem we add and this warrants, I think, the formalization of a new concept: protocols.
16 lines
299 B
Plaintext
16 lines
299 B
Plaintext
( -- n )
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: _idle 0xff (spix) ;
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( -- n )
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( spix 0xff until the response is something else than 0xff
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for a maximum of 20 times. Returns 0xff if no response. )
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: _wait
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0 ( cnt )
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BEGIN
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_idle
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DUP 0xff = IF DROP ELSE NIP EXIT THEN
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1+
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DUP 20 = UNTIL
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DROP 0xff
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;
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