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42 lines
546 B
C
42 lines
546 B
C
#include "spi.h"
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#include "cpu.h"
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void spiInit(void)
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{
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uint8_t bcp;
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//clock it up
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CLKEN |= 0x08;
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//enable the unit
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bcp = CFGPAGE;
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CFGPAGE = 4;
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SPIENA = 0x81;
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CFGPAGE = bcp;
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}
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uint8_t spiByte(uint8_t val)
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{
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uint8_t bcp = CFGPAGE;
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CFGPAGE = 4;
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SPITX = val;
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SPICFG = 0xa0; //spi at 4mhz, mode 0
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while(SPICFG & 0x20);
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val = SPIRX;
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CFGPAGE = bcp;
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return val;
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}
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void spiTXByte(uint8_t val)
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{
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uint8_t bcp = CFGPAGE;
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CFGPAGE = 4;
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SPITX = val;
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SPICFG = 0xa0; //spi at 4mhz, mode 0
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while(SPICFG & 0x20);
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CFGPAGE = bcp;
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} |