65 lines
1.3 KiB
C++
65 lines
1.3 KiB
C++
#include "softspim.h"
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#include "writepin.h"
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#include <util/delay.h>
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SpiMaster::SpiMaster()
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{
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}
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uint8_t SpiMaster::readWrite(uint8_t in)
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{
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_delay_us(DELAY_TIME_US);
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uint8_t recByte = 0;
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for(uint8_t i = 0; i < 8; ++i)
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{
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if constexpr (BIT_ORDER == 0)
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writePin(_port, _pinOut, in & (1 << i));
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else
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writePin(_port, _pinOut, in & (1 << (7-i)));
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if constexpr (CLOCK_PHASE == 0)
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_delay_us(DELAY_TIME_US);
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writePin(_port, _pinClock, !CLOCK_POLARITY);
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if constexpr (CLOCK_PHASE == 1)
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_delay_us(DELAY_TIME_US);
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if constexpr (BIT_ORDER == 0)
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recByte |= readPin(_pinReg, _pinIn) << i;
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else
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recByte |= readPin(_pinReg, _pinIn) << (7-i);
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if constexpr (CLOCK_PHASE == 0)
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_delay_us(DELAY_TIME_US);
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writePin(_port, _pinClock, CLOCK_POLARITY);
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if constexpr (CLOCK_PHASE == 1)
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_delay_us(DELAY_TIME_US);
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}
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return recByte;
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}
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void SpiMaster::readWrite(uint8_t length, uint8_t* bufferIn, uint8_t* bufferOut)
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{
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for(uint8_t i = 0; i < length; ++i)
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{
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uint8_t outByte = 0;
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if(bufferOut) outByte = bufferOut[i];
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uint8_t inByte = readWrite(outByte);
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if(bufferIn) bufferIn[i] = inByte;
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}
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}
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void SpiMaster::prepare()
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{
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writePin(_port, _pinClock, CLOCK_POLARITY);
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}
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void SpiMaster::write(uint8_t in)
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{
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readWrite(in);
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}
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uint8_t SpiMaster::read()
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{
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return readWrite();
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}
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