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https://github.com/RobTillaart/Arduino.git
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915 lines
17 KiB
C++
915 lines
17 KiB
C++
//
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// FILE: MCP23S17.cpp
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// AUTHOR: Rob Tillaart
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// VERSION: 0.5.3
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// PURPOSE: Arduino library for SPI MCP23S17 16 channel port expander
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// DATE: 2021-12-30
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// URL: https://github.com/RobTillaart/MCP23S17
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#include "MCP23S17.h"
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// SOFTWARE SPI
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MCP23S17::MCP23S17(uint8_t select, uint8_t dataIn, uint8_t dataOut, uint8_t clock, uint8_t address)
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{
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_address = (address << 1);
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_select = select;
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_dataIn = dataIn;
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_dataOut = dataOut;
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_clock = clock;
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_error = MCP23S17_OK;
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_hwSPI = false;
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}
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// HARDWARE SPI
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MCP23S17::MCP23S17(int select, __SPI_CLASS__ * spi)
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{
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MCP23S17(select, 0x00, spi);
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}
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MCP23S17::MCP23S17(int select, int address, __SPI_CLASS__ * spi)
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{
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_address = (address << 1);
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_select = select;
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_error = MCP23S17_OK;
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_mySPI = spi;
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_hwSPI = true;
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}
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bool MCP23S17::begin(bool pullup)
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{
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::pinMode(_select, OUTPUT);
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::digitalWrite(_select, HIGH);
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// 8 MHz - datasheet page 8
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_spi_settings = SPISettings(_SPIspeed, MSBFIRST, SPI_MODE0);
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if (_hwSPI)
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{
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// _mySPI->end();
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// _mySPI->begin();
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}
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else
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{
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::pinMode(_dataIn, INPUT);
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::pinMode(_dataOut, OUTPUT);
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::pinMode(_clock, OUTPUT);
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::digitalWrite(_dataOut, LOW);
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::digitalWrite(_clock, LOW);
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}
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// check connected
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if (! isConnected()) return false;
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// disable address increment - datasheet P20
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// note that address increment must be enabled for readReg16() and writeReg16() to work.
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// SEQOP: Sequential Operation mode bit
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// 1 = Sequential operation disabled, address pointer does not increment.
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// 0 = Sequential operation enabled, address pointer increments.
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uint8_t reg = readReg(MCP23x17_IOCR);
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if (reg & MCP23x17_IOCR_SEQOP) // check if already zero
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{
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reg &= ~MCP23x17_IOCR_SEQOP; // clear SEQOP bit for sequential read/write
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if (! writeReg(MCP23x17_IOCR, reg)) return false;
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}
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if (pullup)
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{
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// Force INPUT_PULLUP
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if (! writeReg(MCP23x17_PUR_A, 0xFF)) return false; // 0xFF == all UP
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if (! writeReg(MCP23x17_PUR_B, 0xFF)) return false; // 0xFF == all UP
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}
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return true;
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}
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// just to keep interface in sync with I2C MCP23017 library.
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bool MCP23S17::isConnected()
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{
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_error = MCP23S17_OK;
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return true;
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}
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uint8_t MCP23S17::getAddress()
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{
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return (_address >> 1);
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}
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///////////////////////////////////////////////////////////////////
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//
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// single pin interface
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//
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// pin = 0..15
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// mode = INPUT, OUTPUT, INPUT_PULLUP (= same as INPUT)
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bool MCP23S17::pinMode1(uint8_t pin, uint8_t mode)
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{
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if (pin > 15)
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{
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_error = MCP23S17_PIN_ERROR;
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return false;
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}
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if ((mode != INPUT) && (mode != INPUT_PULLUP) && (mode != OUTPUT))
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{
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_error = MCP23S17_VALUE_ERROR;
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return false;
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}
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uint8_t dataDirectionRegister = MCP23x17_DDR_A;
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if (pin > 7)
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{
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dataDirectionRegister = MCP23x17_DDR_B;
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pin -= 8;
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}
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uint8_t val = readReg(dataDirectionRegister);
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if (_error != MCP23S17_OK)
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{
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return false;
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}
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uint8_t mask = 1 << pin;
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// only work with valid
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if ((mode == INPUT) || (mode == INPUT_PULLUP))
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{
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val |= mask;
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}
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else if (mode == OUTPUT)
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{
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val &= ~mask;
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}
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// other values won't change val ....
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writeReg(dataDirectionRegister, val);
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if (_error != MCP23S17_OK)
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{
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return false;
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}
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return true;
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}
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// pin = 0..15
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// value = LOW, HIGH
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bool MCP23S17::write1(uint8_t pin, uint8_t value)
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{
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if (pin > 15)
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{
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_error = MCP23S17_PIN_ERROR;
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return false;
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}
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uint8_t IOR = MCP23x17_GPIO_A;
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if (pin > 7)
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{
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IOR = MCP23x17_GPIO_B;
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pin -= 8;
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}
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uint8_t val = readReg(IOR);
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uint8_t pre = val;
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if (_error != MCP23S17_OK)
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{
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return false;
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}
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uint8_t mask = 1 << pin;
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if (value)
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{
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val |= mask;
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}
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else
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{
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val &= ~mask;
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}
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// only write when changed.
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if (pre != val)
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{
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writeReg(IOR, val);
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if (_error != MCP23S17_OK)
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{
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return false;
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}
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}
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return true;
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}
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uint8_t MCP23S17::read1(uint8_t pin)
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{
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if (pin > 15)
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{
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_error = MCP23S17_PIN_ERROR;
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return MCP23S17_INVALID_READ;
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}
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uint8_t IOR = MCP23x17_GPIO_A;
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if (pin > 7)
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{
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IOR = MCP23x17_GPIO_B;
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pin -= 8;
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}
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uint8_t val = readReg(IOR);
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if (_error != MCP23S17_OK)
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{
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return MCP23S17_INVALID_READ;
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}
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uint8_t mask = 1 << pin;
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if (val & mask) return HIGH;
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return LOW;
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}
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// pin = 0..15
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// reversed = true or false
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bool MCP23S17::setPolarity(uint8_t pin, bool reversed)
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{
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if (pin > 15)
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{
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_error = MCP23S17_PIN_ERROR;
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return false;
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}
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uint8_t inputPolarityRegister = MCP23x17_POL_A;
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if (pin > 7)
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{
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inputPolarityRegister = MCP23x17_POL_B;
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pin -= 8;
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}
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uint8_t val = readReg(inputPolarityRegister);
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if (_error != MCP23S17_OK)
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{
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return false;
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}
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uint8_t mask = 1 << pin;
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if (reversed)
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{
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val |= mask;
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}
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else
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{
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val &= ~mask;
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}
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writeReg(inputPolarityRegister, val);
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if (_error != MCP23S17_OK)
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{
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return false;
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}
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return true;
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}
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bool MCP23S17::getPolarity(uint8_t pin, bool &reversed)
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{
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if (pin > 15)
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{
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_error = MCP23S17_PIN_ERROR;
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return false;
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}
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uint8_t inputPolarityRegister = MCP23x17_POL_A;
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if (pin > 7)
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{
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inputPolarityRegister = MCP23x17_POL_B;
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pin -= 8;
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}
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uint8_t val = readReg(inputPolarityRegister);
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if (_error != MCP23S17_OK)
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{
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return false;
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}
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uint8_t mask = 1 << pin;
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reversed = (val & mask) > 0;
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return true;
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}
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// pin = 0..15
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// pullup = true or false
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bool MCP23S17::setPullup(uint8_t pin, bool pullup)
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{
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if (pin > 15)
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{
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_error = MCP23S17_PIN_ERROR;
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return false;
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}
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uint8_t inputPullupRegister = MCP23x17_PUR_A;
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if (pin > 7)
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{
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inputPullupRegister = MCP23x17_PUR_B;
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pin -= 8;
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}
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uint8_t val = readReg(inputPullupRegister);
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if (_error != MCP23S17_OK)
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{
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return false;
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}
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uint8_t mask = 1 << pin;
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if (pullup)
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{
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val |= mask;
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}
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else
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{
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val &= ~mask;
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}
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writeReg(inputPullupRegister, val);
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if (_error != MCP23S17_OK)
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{
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return false;
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}
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return true;
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}
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bool MCP23S17::getPullup(uint8_t pin, bool &pullup)
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{
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if (pin > 15)
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{
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_error = MCP23S17_PIN_ERROR;
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return false;
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}
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uint8_t inputPullupRegister = MCP23x17_PUR_A;
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if (pin > 7)
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{
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inputPullupRegister = MCP23x17_PUR_B;
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pin -= 8;
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}
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uint8_t val = readReg(inputPullupRegister);
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if (_error != MCP23S17_OK)
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{
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return false;
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}
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uint8_t mask = 1 << pin;
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pullup = (val & mask) > 0;
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return true;
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}
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void MCP23S17::setSPIspeed(uint32_t speed)
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{
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_SPIspeed = speed;
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_spi_settings = SPISettings(_SPIspeed, MSBFIRST, SPI_MODE0);
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};
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///////////////////////////////////////////////////////////////////
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//
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// 8 pins interface
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//
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// whole register at once
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// port = 0..1
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// value = 0..0xFF bit pattern
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bool MCP23S17::pinMode8(uint8_t port, uint8_t value)
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{
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if (port > 1)
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{
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_error = MCP23S17_PORT_ERROR;
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return false;
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}
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if (port == 0) writeReg(MCP23x17_DDR_A, value);
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if (port == 1) writeReg(MCP23x17_DDR_B, value);
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_error = MCP23S17_OK;
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return true;
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}
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// port = 0..1
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bool MCP23S17::write8(uint8_t port, uint8_t value)
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{
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if (port > 1)
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{
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_error = MCP23S17_PORT_ERROR;
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return false;
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}
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if (port == 0) writeReg(MCP23x17_GPIO_A, value);
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if (port == 1) writeReg(MCP23x17_GPIO_B, value);
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_error = MCP23S17_OK;
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return true;
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}
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int MCP23S17::read8(uint8_t port)
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{
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if (port > 1)
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{
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_error = MCP23S17_PORT_ERROR;
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return MCP23S17_INVALID_READ;
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}
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_error = MCP23S17_OK;
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if (port == 0) return readReg(MCP23x17_GPIO_A);
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return readReg(MCP23x17_GPIO_B); // port == 1
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}
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// port = 0..1
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// mask = 0..0xFF bit pattern
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bool MCP23S17::setPolarity8(uint8_t port, uint8_t mask)
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{
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if (port > 1)
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{
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_error = MCP23S17_PORT_ERROR;
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return false;
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}
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if (port == 0) writeReg(MCP23x17_POL_A, mask);
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if (port == 1) writeReg(MCP23x17_POL_B, mask);
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if (_error != MCP23S17_OK)
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{
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return false;
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}
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return true;
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}
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bool MCP23S17::getPolarity8(uint8_t port, uint8_t &mask)
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{
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if (port > 1)
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{
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_error = MCP23S17_PORT_ERROR;
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return false;
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}
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if (port == 0) mask = readReg(MCP23x17_POL_A);
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if (port == 1) mask = readReg(MCP23x17_POL_B);
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if (_error != MCP23S17_OK)
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{
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return false;
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}
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return true;
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}
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// port = 0..1
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// mask = 0..0xFF bit pattern
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bool MCP23S17::setPullup8(uint8_t port, uint8_t mask)
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{
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if (port > 1)
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{
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_error = MCP23S17_PORT_ERROR;
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return false;
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}
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if (port == 0) writeReg(MCP23x17_PUR_A, mask);
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if (port == 1) writeReg(MCP23x17_PUR_B, mask);
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if (_error != MCP23S17_OK)
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{
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return false;
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}
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return true;
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}
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bool MCP23S17::getPullup8(uint8_t port, uint8_t &mask)
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{
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if (port > 1)
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{
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_error = MCP23S17_PORT_ERROR;
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return false;
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}
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if (port == 0) mask = readReg(MCP23x17_PUR_A);
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if (port == 1) mask = readReg(MCP23x17_PUR_B);
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if (_error != MCP23S17_OK)
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{
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return false;
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}
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return true;
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}
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///////////////////////////////////////////////////////////////////
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//
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// 16 pins interface
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//
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// two register at once
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// value = 0x0000..0xFFFF bit pattern
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bool MCP23S17::pinMode16(uint16_t value)
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{
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writeReg16(MCP23x17_DDR_A, value);
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_error = MCP23S17_OK;
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return true;
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}
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// value = 0x0000..0xFFFF bit pattern
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bool MCP23S17::write16(uint16_t value)
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{
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writeReg16(MCP23x17_GPIO_A, value);
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_error = MCP23S17_OK;
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return true;
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}
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// return = 0x0000..0xFFFF bit pattern
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uint16_t MCP23S17::read16()
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{
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_error = MCP23S17_OK;
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uint16_t value = readReg16(MCP23x17_GPIO_A);
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return value;
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}
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// mask = 0x0000..0xFFFF bit pattern
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bool MCP23S17::setPolarity16(uint16_t mask)
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{
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writeReg16(MCP23x17_POL_A, mask);
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if (_error != MCP23S17_OK)
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{
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return false;
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}
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return true;
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}
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// mask = 0x0000..0xFFFF bit pattern
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bool MCP23S17::getPolarity16(uint16_t &mask)
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{
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mask = readReg16(MCP23x17_POL_A);
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if (_error != MCP23S17_OK)
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{
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return false;
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}
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return true;
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}
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// mask = 0x0000..0xFFFF bit pattern
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bool MCP23S17::setPullup16(uint16_t mask)
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{
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writeReg16(MCP23x17_PUR_A, mask);
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if (_error != MCP23S17_OK)
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{
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return false;
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}
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return true;
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}
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// mask = 0x0000..0xFFFF bit pattern
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bool MCP23S17::getPullup16(uint16_t &mask)
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{
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mask = readReg16(MCP23x17_PUR_A);
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if (_error != MCP23S17_OK)
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{
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return false;
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}
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return true;
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}
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///////////////////////////////////////////////////
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//
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// INTERRUPTS (experimental, see MCP23S17 - #40)
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//
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// TODO, catch writeReg errors
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// TODO, MCP23x17_INT_MODE_ERROR?
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// TODO, if register not changed no need to update?
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// TODO, 8 bits optimize? more code vs speed?
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//
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// pin = 0..15, mode = { RISING, FALLING, CHANGE }
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bool MCP23S17::enableInterrupt(uint8_t pin, uint8_t mode)
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{
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if (pin > 15)
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{
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_error = MCP23S17_PIN_ERROR;
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return false;
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}
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// right mode
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uint16_t intcon = readReg16(MCP23x17_INTCON_A);
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if (mode == CHANGE)
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{
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// compare to previous value.
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intcon &= ~(1 << pin);
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}
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else
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{
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uint16_t defval = readReg16(MCP23x17_DEFVAL_A);
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if (mode == RISING)
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{
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intcon |= (1 << pin);
|
|
defval &= ~(1 << pin); // RISING == compare to 0
|
|
}
|
|
else if (mode == FALLING)
|
|
{
|
|
intcon |= (1 << pin);
|
|
defval |= ~(1 << pin); // FALLING == compare to 1
|
|
}
|
|
writeReg16(MCP23x17_DEFVAL_A, defval);
|
|
}
|
|
writeReg16(MCP23x17_INTCON_A, intcon);
|
|
|
|
// enable interrupt
|
|
uint16_t value = readReg16(MCP23x17_GPINTEN_A);
|
|
value |= (1 << pin);
|
|
return writeReg16(MCP23x17_GPINTEN_A, value);
|
|
}
|
|
|
|
|
|
bool MCP23S17::disableInterrupt(uint8_t pin)
|
|
{
|
|
if (pin > 15)
|
|
{
|
|
_error = MCP23S17_PIN_ERROR;
|
|
return false;
|
|
}
|
|
// disable interrupt
|
|
uint16_t value = readReg16(MCP23x17_GPINTEN_A);
|
|
value &= ~(1 << pin);
|
|
return writeReg16(MCP23x17_GPINTEN_A, value);
|
|
}
|
|
|
|
|
|
bool MCP23S17::enableInterrupt16(uint16_t mask, uint8_t mode)
|
|
{
|
|
uint16_t intcon = 0, defval = 0;
|
|
// right mode
|
|
if (mode == CHANGE)
|
|
{
|
|
// compare to previous value.
|
|
intcon = ~mask;
|
|
}
|
|
else
|
|
{
|
|
if (mode == RISING)
|
|
{
|
|
intcon = mask;
|
|
defval = ~mask; // RISING == compare to 0
|
|
}
|
|
else if (mode == FALLING)
|
|
{
|
|
intcon = mask;
|
|
defval = mask; // FALLING == compare to 1
|
|
}
|
|
writeReg16(MCP23x17_DEFVAL_A, defval);
|
|
}
|
|
writeReg16(MCP23x17_INTCON_A, intcon);
|
|
|
|
// enable the mask
|
|
writeReg16(MCP23x17_GPINTEN_A, mask);
|
|
return true;
|
|
}
|
|
|
|
|
|
bool MCP23S17::disableInterrupt16(uint16_t mask)
|
|
{
|
|
return writeReg16(MCP23x17_GPINTEN_A, ~mask);
|
|
}
|
|
|
|
|
|
// which pins caused the INT?
|
|
uint16_t MCP23S17::getInterruptFlagRegister()
|
|
{
|
|
return readReg16(MCP23x17_INTF_A);
|
|
}
|
|
|
|
|
|
uint16_t MCP23S17::getInterruptCaptureRegister()
|
|
{
|
|
return readReg16(MCP23x17_INTCAP_A);
|
|
}
|
|
|
|
// polarity: 0 = LOW, 1 = HIGH, 2 = NONE/ODR
|
|
bool MCP23S17::setInterruptPolarity(uint8_t polarity)
|
|
{
|
|
if (polarity > 2) return false;
|
|
uint8_t reg = readReg(MCP23x17_IOCR);
|
|
reg &= ~(MCP23x17_IOCR_ODR | MCP23x17_IOCR_INTPOL);
|
|
// LOW is default set.
|
|
if (polarity == 2) reg |= MCP23x17_IOCR_ODR;
|
|
if (polarity == 1) reg |= MCP23x17_IOCR_INTPOL;
|
|
return writeReg(MCP23x17_IOCR, reg);
|
|
}
|
|
|
|
|
|
uint8_t MCP23S17::getInterruptPolarity()
|
|
{
|
|
uint8_t reg = readReg(MCP23x17_IOCR);
|
|
if (reg & MCP23x17_IOCR_ODR) return 2;
|
|
if (reg & MCP23x17_IOCR_INTPOL) return 1;
|
|
return 0;
|
|
}
|
|
|
|
|
|
bool MCP23S17::mirrorInterrupts(bool on)
|
|
{
|
|
if (on) return enableControlRegister(MCP23x17_IOCR_MIRROR);
|
|
return disableControlRegister(MCP23x17_IOCR_MIRROR);
|
|
}
|
|
|
|
|
|
bool MCP23S17::isMirroredInterrupts()
|
|
{
|
|
return (readReg(MCP23x17_IOCR) & MCP23x17_IOCR_MIRROR) > 0;
|
|
}
|
|
|
|
|
|
/////////////////////////////////////////////
|
|
//
|
|
// MISC
|
|
//
|
|
int MCP23S17::lastError()
|
|
{
|
|
int e = _error;
|
|
_error = MCP23S17_OK; // reset error after read.
|
|
return e;
|
|
}
|
|
|
|
|
|
bool MCP23S17::enableControlRegister(uint8_t mask)
|
|
{
|
|
uint8_t reg = readReg(MCP23x17_IOCR);
|
|
reg |= mask;
|
|
return writeReg(MCP23x17_IOCR, reg);
|
|
}
|
|
|
|
|
|
bool MCP23S17::disableControlRegister(uint8_t mask)
|
|
{
|
|
uint8_t reg = readReg(MCP23x17_IOCR);
|
|
reg &= ~mask;
|
|
return writeReg(MCP23x17_IOCR, reg);
|
|
}
|
|
|
|
|
|
bool MCP23S17::enableHardwareAddress()
|
|
{
|
|
return enableControlRegister(MCP23x17_IOCR_HAEN);
|
|
}
|
|
|
|
|
|
bool MCP23S17::disableHardwareAddress()
|
|
{
|
|
return disableControlRegister(MCP23x17_IOCR_HAEN);
|
|
}
|
|
|
|
|
|
////////////////////////////////////////////////////
|
|
//
|
|
// PROTECTED
|
|
//
|
|
|
|
|
|
// low level read / write masks
|
|
#define MCP23S17_WRITE_REG 0x40
|
|
#define MCP23S17_READ_REG 0x41
|
|
|
|
|
|
bool MCP23S17::writeReg(uint8_t reg, uint8_t value)
|
|
{
|
|
_error = MCP23S17_OK;
|
|
|
|
if (reg > MCP23x17_OLAT_B)
|
|
{
|
|
_error = MCP23S17_REGISTER_ERROR;
|
|
return false;
|
|
}
|
|
|
|
// start write
|
|
::digitalWrite(_select, LOW);
|
|
if (_hwSPI)
|
|
{
|
|
_mySPI->beginTransaction(_spi_settings);
|
|
// _address already shifted
|
|
_mySPI->transfer(MCP23S17_WRITE_REG | _address );
|
|
_mySPI->transfer(reg);
|
|
_mySPI->transfer(value);
|
|
_mySPI->endTransaction();
|
|
}
|
|
else
|
|
{
|
|
// _address already shifted
|
|
swSPI_transfer(MCP23S17_WRITE_REG | _address );
|
|
swSPI_transfer(reg);
|
|
swSPI_transfer(value);
|
|
}
|
|
::digitalWrite(_select, HIGH);
|
|
return true;
|
|
}
|
|
|
|
|
|
uint8_t MCP23S17::readReg(uint8_t reg)
|
|
{
|
|
uint8_t rv = 0;
|
|
|
|
_error = MCP23S17_OK;
|
|
|
|
if (reg > MCP23x17_OLAT_B)
|
|
{
|
|
_error = MCP23S17_REGISTER_ERROR;
|
|
return 0;
|
|
}
|
|
|
|
// start read
|
|
::digitalWrite(_select, LOW);
|
|
if (_hwSPI)
|
|
{
|
|
_mySPI->beginTransaction(_spi_settings);
|
|
// _address already shifted
|
|
_mySPI->transfer(MCP23S17_READ_REG | _address );
|
|
_mySPI->transfer(reg);
|
|
rv = _mySPI->transfer(0xFF);
|
|
_mySPI->endTransaction();
|
|
}
|
|
else
|
|
{
|
|
// _address already shifted
|
|
swSPI_transfer(MCP23S17_READ_REG | _address );
|
|
swSPI_transfer(reg);
|
|
rv = swSPI_transfer(0xFF);
|
|
}
|
|
::digitalWrite(_select, HIGH);
|
|
return rv;
|
|
}
|
|
|
|
|
|
// writes HIGH byte first, LOW byte last
|
|
bool MCP23S17::writeReg16(uint8_t reg, uint16_t value)
|
|
{
|
|
_error = MCP23S17_OK;
|
|
|
|
if (reg > MCP23x17_OLAT_B)
|
|
{
|
|
_error = MCP23S17_REGISTER_ERROR;
|
|
return false;
|
|
}
|
|
|
|
// start write
|
|
::digitalWrite(_select, LOW);
|
|
if (_hwSPI)
|
|
{
|
|
_mySPI->beginTransaction(_spi_settings);
|
|
// _address already shifted
|
|
_mySPI->transfer(MCP23S17_WRITE_REG | _address );
|
|
_mySPI->transfer(reg);
|
|
_mySPI->transfer(value >> 8);
|
|
_mySPI->transfer(value & 0xFF);
|
|
_mySPI->endTransaction();
|
|
}
|
|
else
|
|
{
|
|
// _address already shifted
|
|
swSPI_transfer(MCP23S17_WRITE_REG | _address );
|
|
swSPI_transfer(reg);
|
|
swSPI_transfer(value >> 8);
|
|
swSPI_transfer(value & 0xFF);
|
|
}
|
|
::digitalWrite(_select, HIGH);
|
|
return true;
|
|
}
|
|
|
|
|
|
uint16_t MCP23S17::readReg16(uint8_t reg)
|
|
{
|
|
uint16_t rv = 0;
|
|
|
|
_error = MCP23S17_OK;
|
|
|
|
if (reg > MCP23x17_OLAT_B)
|
|
{
|
|
_error = MCP23S17_REGISTER_ERROR;
|
|
return 0;
|
|
}
|
|
|
|
// start read
|
|
::digitalWrite(_select, LOW);
|
|
if (_hwSPI)
|
|
{
|
|
_mySPI->beginTransaction(_spi_settings);
|
|
// _address already shifted
|
|
_mySPI->transfer(MCP23S17_READ_REG | _address );
|
|
_mySPI->transfer(reg);
|
|
rv = _mySPI->transfer(0xFF) << 8;
|
|
rv += _mySPI->transfer(0xFF);
|
|
_mySPI->endTransaction();
|
|
}
|
|
else
|
|
{
|
|
// _address already shifted
|
|
swSPI_transfer(MCP23S17_READ_REG | _address );
|
|
swSPI_transfer(reg);
|
|
rv = swSPI_transfer(0xFF) << 8;
|
|
rv += swSPI_transfer(0xFF);
|
|
}
|
|
::digitalWrite(_select, HIGH);
|
|
return rv;
|
|
}
|
|
|
|
|
|
uint8_t MCP23S17::swSPI_transfer(uint8_t val)
|
|
{
|
|
uint8_t clk = _clock;
|
|
uint8_t dao = _dataOut;
|
|
uint8_t dai = _dataIn;
|
|
|
|
uint8_t rv = 0;
|
|
for (uint8_t mask = 0x80; mask > 0; mask >>= 1)
|
|
{
|
|
::digitalWrite(dao, (val & mask) ? HIGH : LOW);
|
|
::digitalWrite(clk, HIGH);
|
|
if (::digitalRead(dai) == HIGH) rv |= mask;
|
|
::digitalWrite(clk, LOW);
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
|
|
// -- END OF FILE --
|
|
|