ilkay KOZAK / RadioHead-148

V148

Fork of RadioHead-148 by David Rimer

RHSPIDriver.cpp@1:b7641da2b203, 2017-10-25 (annotated)

Committer:
ilkaykozak
Date:
Wed Oct 25 05:14:09 2017 +0000
Revision:
1:b7641da2b203
Parent:
0:ab4e012489ef 
V148

Who changed what in which revision?

UserRevisionLine numberNew contents of line
davidr99 0:ab4e012489ef 1 // RHSPIDriver.cpp
davidr99 0:ab4e012489ef 2 //
davidr99 0:ab4e012489ef 3 // Copyright (C) 2014 Mike McCauley
davidr99 0:ab4e012489ef 4 // $Id: RHSPIDriver.cpp,v 1.9 2014/05/03 00:20:36 mikem Exp $
davidr99 0:ab4e012489ef 5
davidr99 0:ab4e012489ef 6 #include <RHSPIDriver.h>
davidr99 0:ab4e012489ef 7
davidr99 0:ab4e012489ef 8 RHSPIDriver::RHSPIDriver(PINS slaveSelectPin, RHGenericSPI& spi)
davidr99 0:ab4e012489ef 9 :
davidr99 0:ab4e012489ef 10 _spi(spi),
davidr99 0:ab4e012489ef 11 _slaveSelectPin(slaveSelectPin)
davidr99 0:ab4e012489ef 12 {
davidr99 0:ab4e012489ef 13 }
davidr99 0:ab4e012489ef 14
davidr99 0:ab4e012489ef 15 bool RHSPIDriver::init()
davidr99 0:ab4e012489ef 16 {
davidr99 0:ab4e012489ef 17 // start the SPI library with the default speeds etc:
davidr99 0:ab4e012489ef 18 // On Arduino Due this defaults to SPI1 on the central group of 6 SPI pins
davidr99 0:ab4e012489ef 19 _spi.begin();
davidr99 0:ab4e012489ef 20
davidr99 0:ab4e012489ef 21 // Initialise the slave select pin
davidr99 0:ab4e012489ef 22 // On Maple, this must be _after_ spi.begin
davidr99 0:ab4e012489ef 23 #if (RH_PLATFORM != RH_PLATFORM_MBED)
davidr99 0:ab4e012489ef 24 pinMode(_slaveSelectPin, OUTPUT);
davidr99 0:ab4e012489ef 25 #endif
davidr99 0:ab4e012489ef 26 digitalWrite(_slaveSelectPin, HIGH);
davidr99 0:ab4e012489ef 27
davidr99 0:ab4e012489ef 28 delay(100);
davidr99 0:ab4e012489ef 29 return true;
davidr99 0:ab4e012489ef 30 }
davidr99 0:ab4e012489ef 31
davidr99 0:ab4e012489ef 32 uint8_t RHSPIDriver::spiRead(uint8_t reg)
davidr99 0:ab4e012489ef 33 {
davidr99 0:ab4e012489ef 34 uint8_t val;
davidr99 0:ab4e012489ef 35 ATOMIC_BLOCK_START;
davidr99 0:ab4e012489ef 36 digitalWrite(_slaveSelectPin, LOW);
davidr99 0:ab4e012489ef 37 _spi.transfer(reg & ~RH_SPI_WRITE_MASK); // Send the address with the write mask off
davidr99 0:ab4e012489ef 38 val = _spi.transfer(0); // The written value is ignored, reg value is read
davidr99 0:ab4e012489ef 39 digitalWrite(_slaveSelectPin, HIGH);
davidr99 0:ab4e012489ef 40 ATOMIC_BLOCK_END;
davidr99 0:ab4e012489ef 41 return val;
davidr99 0:ab4e012489ef 42 }
davidr99 0:ab4e012489ef 43
davidr99 0:ab4e012489ef 44 uint8_t RHSPIDriver::spiWrite(uint8_t reg, uint8_t val)
davidr99 0:ab4e012489ef 45 {
davidr99 0:ab4e012489ef 46 uint8_t status = 0;
davidr99 0:ab4e012489ef 47 ATOMIC_BLOCK_START;
davidr99 0:ab4e012489ef 48 digitalWrite(_slaveSelectPin, LOW);
davidr99 0:ab4e012489ef 49 status = _spi.transfer(reg | RH_SPI_WRITE_MASK); // Send the address with the write mask on
davidr99 0:ab4e012489ef 50 _spi.transfer(val); // New value follows
davidr99 0:ab4e012489ef 51 digitalWrite(_slaveSelectPin, HIGH);
davidr99 0:ab4e012489ef 52 ATOMIC_BLOCK_END;
davidr99 0:ab4e012489ef 53 return status;
davidr99 0:ab4e012489ef 54 }
davidr99 0:ab4e012489ef 55
davidr99 0:ab4e012489ef 56 uint8_t RHSPIDriver::spiBurstRead(uint8_t reg, uint8_t* dest, uint8_t len)
davidr99 0:ab4e012489ef 57 {
davidr99 0:ab4e012489ef 58 uint8_t status = 0;
davidr99 0:ab4e012489ef 59 ATOMIC_BLOCK_START;
davidr99 0:ab4e012489ef 60 digitalWrite(_slaveSelectPin, LOW);
davidr99 0:ab4e012489ef 61 status = _spi.transfer(reg & ~RH_SPI_WRITE_MASK); // Send the start address with the write mask off
davidr99 0:ab4e012489ef 62 while (len--)
davidr99 0:ab4e012489ef 63 *dest++ = _spi.transfer(0);
davidr99 0:ab4e012489ef 64 digitalWrite(_slaveSelectPin, HIGH);
davidr99 0:ab4e012489ef 65 ATOMIC_BLOCK_END;
davidr99 0:ab4e012489ef 66 return status;
davidr99 0:ab4e012489ef 67 }
davidr99 0:ab4e012489ef 68
davidr99 0:ab4e012489ef 69 uint8_t RHSPIDriver::spiBurstWrite(uint8_t reg, const uint8_t* src, uint8_t len)
davidr99 0:ab4e012489ef 70 {
davidr99 0:ab4e012489ef 71 uint8_t status = 0;
davidr99 0:ab4e012489ef 72 ATOMIC_BLOCK_START;
davidr99 0:ab4e012489ef 73 digitalWrite(_slaveSelectPin, LOW);
davidr99 0:ab4e012489ef 74 status = _spi.transfer(reg | RH_SPI_WRITE_MASK); // Send the start address with the write mask on
davidr99 0:ab4e012489ef 75 while (len--)
davidr99 0:ab4e012489ef 76 _spi.transfer(*src++);
davidr99 0:ab4e012489ef 77 digitalWrite(_slaveSelectPin, HIGH);
davidr99 0:ab4e012489ef 78 ATOMIC_BLOCK_END;
davidr99 0:ab4e012489ef 79 return status;
davidr99 0:ab4e012489ef 80 }
davidr99 0:ab4e012489ef 81
davidr99 0:ab4e012489ef 82
davidr99 0:ab4e012489ef 83