114 lines
3.1 KiB
C++
114 lines
3.1 KiB
C++
|
// RHNRFSPIDriver.cpp
|
||
|
|
//
|
||
|
|
// Copyright (C) 2014 Mike McCauley
|
||
|
|
// $Id: RHNRFSPIDriver.cpp,v 1.3 2015/12/16 04:55:33 mikem Exp $
|
||
|
|
|
||
|
|
#include <RHNRFSPIDriver.h>
|
||
|
|
|
||
|
|
RHNRFSPIDriver::RHNRFSPIDriver(uint8_t slaveSelectPin, RHGenericSPI& spi)
|
||
|
|
:
|
||
|
|
_spi(spi),
|
||
|
|
_slaveSelectPin(slaveSelectPin)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
bool RHNRFSPIDriver::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;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Low level commands for interfacing with the device
|
||
|
|
uint8_t RHNRFSPIDriver::spiCommand(uint8_t command)
|
||
|
|
{
|
||
|
|
uint8_t status;
|
||
|
|
ATOMIC_BLOCK_START;
|
||
|
|
_spi.beginTransaction();
|
||
|
|
digitalWrite(_slaveSelectPin, LOW);
|
||
|
|
status = _spi.transfer(command);
|
||
|
|
digitalWrite(_slaveSelectPin, HIGH);
|
||
|
|
_spi.endTransaction();
|
||
|
|
ATOMIC_BLOCK_END;
|
||
|
|
return status;
|
||
|
|
}
|
||
|
|
|
||
|
|
uint8_t RHNRFSPIDriver::spiRead(uint8_t reg)
|
||
|
|
{
|
||
|
|
uint8_t val;
|
||
|
|
ATOMIC_BLOCK_START;
|
||
|
|
_spi.beginTransaction();
|
||
|
|
digitalWrite(_slaveSelectPin, LOW);
|
||
|
|
_spi.transfer(reg); // Send the address, discard the status
|
||
|
|
val = _spi.transfer(0); // The written value is ignored, reg value is read
|
||
|
|
digitalWrite(_slaveSelectPin, HIGH);
|
||
|
|
_spi.endTransaction();
|
||
|
|
ATOMIC_BLOCK_END;
|
||
|
|
return val;
|
||
|
|
}
|
||
|
|
|
||
|
|
uint8_t RHNRFSPIDriver::spiWrite(uint8_t reg, uint8_t val)
|
||
|
|
{
|
||
|
|
uint8_t status = 0;
|
||
|
|
ATOMIC_BLOCK_START;
|
||
|
|
_spi.beginTransaction();
|
||
|
|
digitalWrite(_slaveSelectPin, LOW);
|
||
|
|
status = _spi.transfer(reg); // Send the address
|
||
|
|
_spi.transfer(val); // New value follows
|
||
|
|
#if (RH_PLATFORM == RH_PLATFORM_ARDUINO) && defined(__arm__) && defined(CORE_TEENSY)
|
||
|
|
// Sigh: some devices, such as MRF89XA dont work properly on Teensy 3.1:
|
||
|
|
// At 1MHz, the clock returns low _after_ slave select goes high, which prevents SPI
|
||
|
|
// write working. This delay gixes time for the clock to return low.
|
||
|
|
delayMicroseconds(5);
|
||
|
|
#endif
|
||
|
|
digitalWrite(_slaveSelectPin, HIGH);
|
||
|
|
_spi.endTransaction();
|
||
|
|
ATOMIC_BLOCK_END;
|
||
|
|
return status;
|
||
|
|
}
|
||
|
|
|
||
|
|
uint8_t RHNRFSPIDriver::spiBurstRead(uint8_t reg, uint8_t* dest, uint8_t len)
|
||
|
|
{
|
||
|
|
uint8_t status = 0;
|
||
|
|
ATOMIC_BLOCK_START;
|
||
|
|
_spi.beginTransaction();
|
||
|
|
digitalWrite(_slaveSelectPin, LOW);
|
||
|
|
status = _spi.transfer(reg); // Send the start address
|
||
|
|
while (len--)
|
||
|
|
*dest++ = _spi.transfer(0);
|
||
|
|
digitalWrite(_slaveSelectPin, HIGH);
|
||
|
|
_spi.endTransaction();
|
||
|
|
ATOMIC_BLOCK_END;
|
||
|
|
return status;
|
||
|
|
}
|
||
|
|
|
||
|
|
uint8_t RHNRFSPIDriver::spiBurstWrite(uint8_t reg, const uint8_t* src, uint8_t len)
|
||
|
|
{
|
||
|
|
uint8_t status = 0;
|
||
|
|
ATOMIC_BLOCK_START;
|
||
|
|
_spi.beginTransaction();
|
||
|
|
digitalWrite(_slaveSelectPin, LOW);
|
||
|
|
status = _spi.transfer(reg); // Send the start address
|
||
|
|
while (len--)
|
||
|
|
_spi.transfer(*src++);
|
||
|
|
digitalWrite(_slaveSelectPin, HIGH);
|
||
|
|
_spi.endTransaction();
|
||
|
|
ATOMIC_BLOCK_END;
|
||
|
|
return status;
|
||
|
|
}
|
||
|
|
|
||
|
|
void RHNRFSPIDriver::setSlaveSelectPin(uint8_t slaveSelectPin)
|
||
|
|
{
|
||
|
|
_slaveSelectPin = slaveSelectPin;
|
||
|
|
}
|
||
|
|
|
||
|
|
|