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1a6a549857
Working on programming AVR chips exposes a glaring omission in my first design of the SPI Relay: not allowing multiple devices make this task hard. I constantly have to unplug my SD card before, plug the AVR chip holder, then play a bit, then unplug the AVR holder, then replug the SD card... My prototype for a SPI relay design is built, but I haven't tested it yet. I need to adapt the code first, which is what I do here. When the prototype is tested, I'll update the SDC recipe with a new schema.
14 lines
276 B
Plaintext
14 lines
276 B
Plaintext
CODE (spix) ( n -- n )
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HL POP, chkPS, A L LDrr,
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SPI_DATA OUTiA,
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( wait until xchg is done )
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BEGIN, SPI_CTL INAi, A ORr, JRNZ, AGAIN,
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SPI_DATA INAi,
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L A LDrr,
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HL PUSH,
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;CODE
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CODE (spie) ( n -- )
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HL POP, chkPS, A L LDrr,
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SPI_CTL OUTiA,
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;CODE
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