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18 lines
402 B
C
18 lines
402 B
C
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#include "emul.h"
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/* Emulates a SPI relay designed for the RC2014, enabled by poking on the CTL
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port, then allowing a SPI exchange by writing to, then reading from, the
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data port.
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*/
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typedef struct {
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bool selected;
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byte resp;
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EXCH spixfn;
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} SPI;
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void spi_init(SPI *spi, EXCH spixfn);
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void spi_ctl_wr(SPI *spi, byte val);
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void spi_wr(SPI *spi, byte val);
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byte spi_rd(SPI *spi);
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