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LibRHSPIDriver.cpp
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LibRHSPIDriver.cpp
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// RHSPIDriver.cpp
//
// Copyright (C) 2014 Mike McCauley
// $Id: RHSPIDriver.cpp,v 1.9 2014/05/03 00:20:36 mikem Exp $
#include "LibRHSPIDriver.h"
RHSPIDriver::RHSPIDriver(uint8_t slaveSelectPin, RHGenericSPI& spi)
:
_spi(spi),
_slaveSelectPin(slaveSelectPin)
{
}
bool RHSPIDriver::init()
{
// start the SPI library with the default speeds etc:
// On Arduino Due this defaults to SPI1 on the central group of 6 SPI pins
_spi.begin();
// Initialise the slave select pin
// On Maple, this must be _after_ spi.begin
pinMode(_slaveSelectPin, OUTPUT);
digitalWrite(_slaveSelectPin, HIGH);
delay(100);
return true;
}
uint8_t RHSPIDriver::spiRead(uint8_t reg)
{
uint8_t val;
ATOMIC_BLOCK_START;
digitalWrite(_slaveSelectPin, LOW);
_spi.transfer(reg & ~RH_SPI_WRITE_MASK); // Send the address with the write mask off
val = _spi.transfer(0); // The written value is ignored, reg value is read
digitalWrite(_slaveSelectPin, HIGH);
ATOMIC_BLOCK_END;
return val;
}
uint8_t RHSPIDriver::spiWrite(uint8_t reg, uint8_t val)
{
uint8_t status = 0;
ATOMIC_BLOCK_START;
digitalWrite(_slaveSelectPin, LOW);
status = _spi.transfer(reg | RH_SPI_WRITE_MASK); // Send the address with the write mask on
_spi.transfer(val); // New value follows
digitalWrite(_slaveSelectPin, HIGH);
ATOMIC_BLOCK_END;
return status;
}
uint8_t RHSPIDriver::spiBurstRead(uint8_t reg, uint8_t* dest, uint8_t len)
{
uint8_t status = 0;
ATOMIC_BLOCK_START;
digitalWrite(_slaveSelectPin, LOW);
status = _spi.transfer(reg & ~RH_SPI_WRITE_MASK); // Send the start address with the write mask off
while (len--)
*dest++ = _spi.transfer(0);
digitalWrite(_slaveSelectPin, HIGH);
ATOMIC_BLOCK_END;
return status;
}
uint8_t RHSPIDriver::spiBurstWrite(uint8_t reg, const uint8_t* src, uint8_t len)
{
uint8_t status = 0;
ATOMIC_BLOCK_START;
digitalWrite(_slaveSelectPin, LOW);
status = _spi.transfer(reg | RH_SPI_WRITE_MASK); // Send the start address with the write mask on
while (len--)
_spi.transfer(*src++);
digitalWrite(_slaveSelectPin, HIGH);
ATOMIC_BLOCK_END;
return status;
}