29 lines
517 B
C
29 lines
517 B
C
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#include "rc2014_spi.h"
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void spi_init(SPI *spi, EXCH spixfn)
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{
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spi->selected = false;
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spi->resp = 0xff;
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spi->spixfn = spixfn;
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}
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// TODO: for now, any nonzero value enables the SPI. To allow
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// emulation of systems with multi-devices SPI relay, change
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// this.
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void spi_ctl_wr(SPI *spi, byte val)
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{
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spi->selected = val;
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}
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void spi_wr(SPI *spi, byte val)
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{
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if (spi->selected) {
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spi->resp = spi->spixfn(val);
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}
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}
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byte spi_rd(SPI *spi)
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{
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return spi->selected ? spi->resp : 0xff;
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}
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