mirror of
https://github.com/RobTillaart/Arduino.git
synced 2024-09-20 00:55:58 -04:00
456 lines
8.1 KiB
C++
456 lines
8.1 KiB
C++
//
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// FILE: MAX14661.cpp
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// AUTHOR: Rob Tillaart
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// DATE: 2021-01-29
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// VERSION: 0.2.0
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// PURPOSE: Arduino library for MAX14661 16 channel I2C multiplexer
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// URL: https://github.com/RobTillaart/MAX14661
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#include "MAX14661.h"
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//
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// REGISTERS
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//
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#define MAX14661_DIR0 0x00
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#define MAX14661_DIR1 0x01
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#define MAX14661_DIR2 0x02
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#define MAX14661_DIR3 0x03
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#define MAX14661_SHDW0 0x10
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#define MAX14661_SHDW1 0x11
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#define MAX14661_SHDW2 0x12
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#define MAX14661_SHDW3 0x13
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#define MAX14661_CMD_A 0x14
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#define MAX14661_CMD_B 0x15
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MAX14661::MAX14661(const uint8_t deviceAddress, TwoWire *wire)
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{
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_address = deviceAddress;
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_wire = wire;
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_error = MAX14661_OK;
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}
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bool MAX14661::begin()
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{
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_error = MAX14661_OK;
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return isConnected();
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}
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bool MAX14661::isConnected()
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{
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_wire->beginTransmission(_address);
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_error = _wire->endTransmission();
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// set MAX14661_ERR_I2C
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return ( _error == 0);
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}
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uint8_t MAX14661::getAddress()
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{
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return _address;
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}
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/////////////////////////////////////////////////////////
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//
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// PAIR INTERFACE
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//
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bool MAX14661::openChannel(uint8_t channel)
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{
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if (channel > 15) return false;
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uint8_t ch = channel;
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uint8_t reg = MAX14661_DIR0;
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if (ch > 7)
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{
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reg = MAX14661_DIR1;
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ch -= 8;
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}
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uint8_t mask = readRegister(reg);
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mask |= (1 << ch);
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writeRegister(reg, mask);
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reg += 2;
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mask = readRegister(reg);
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mask |= (1 << ch);
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writeRegister(reg, mask);
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return true;
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}
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bool MAX14661::closeChannel(uint8_t channel)
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{
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if (channel > 15) return false;
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uint8_t ch = channel;
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uint8_t reg = MAX14661_DIR0;
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if (ch > 7)
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{
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reg = MAX14661_DIR1;
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ch -= 8;
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}
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uint8_t mask = readRegister(reg);
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mask &= ~(1 << ch);
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writeRegister(reg, mask);
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reg += 2;
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mask = readRegister(reg);
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mask &= ~(1 << ch);
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writeRegister(reg, mask);
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return true;
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}
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// assumption both A and B are in same state
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bool MAX14661::isOpenChannel(uint8_t channel)
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{
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if (channel > 15) return false;
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uint8_t ch = channel;
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uint8_t reg = MAX14661_DIR0;
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if (ch > 7)
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{
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reg = MAX14661_DIR1;
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ch -= 8;
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}
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uint8_t mask = readRegister(reg);
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return (mask & (1 << ch)) > 0;
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}
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void MAX14661::openAllChannels()
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{
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setChannels(0xFFFF);
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}
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void MAX14661::closeAllChannels()
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{
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setChannels(0);
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}
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void MAX14661::setChannels(uint16_t mask)
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{
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writeRegister(MAX14661_DIR0, mask & 0x00FF);
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writeRegister(MAX14661_DIR1, (mask & 0xFF00) >> 8);
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writeRegister(MAX14661_DIR2, mask & 0x00FF);
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writeRegister(MAX14661_DIR3, (mask & 0xFF00) >> 8);
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}
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// assumption both A and B are in same state
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uint16_t MAX14661::getChannels()
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{
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uint16_t channels = readRegister(MAX14661_DIR1) << 8;
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channels |= readRegister(MAX14661_DIR0);
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return channels;
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}
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/////////////////////////////////////////////////////////
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//
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// SHADOW INTERFACE
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//
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void MAX14661::shadowClear()
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{
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setShadowChannelMaskA(0x0000);
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setShadowChannelMaskB(0x0000);
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}
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void MAX14661::activateShadow()
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{
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writeRegister(MAX14661_CMD_A, 0x11);
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writeRegister(MAX14661_CMD_B, 0x11);
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}
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////////////////////////////////////////////////////////////
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void MAX14661::setShadowChannelMaskA(uint16_t mask)
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{
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writeRegister(MAX14661_SHDW0, mask & 0xFF);
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writeRegister(MAX14661_SHDW1, mask >> 8);
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}
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uint16_t MAX14661::getShadowChannelMaskA()
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{
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uint16_t mask = readRegister(MAX14661_SHDW1) << 8;
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mask |= readRegister(MAX14661_SHDW0);
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return mask;
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}
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void MAX14661::setShadowChannelMaskB(uint16_t mask)
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{
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writeRegister(MAX14661_SHDW2, mask & 0xFF);
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writeRegister(MAX14661_SHDW3, mask >> 8);
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}
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uint16_t MAX14661::getShadowChannelMaskB()
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{
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uint16_t mask = readRegister(MAX14661_SHDW3) << 8;
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mask |= readRegister(MAX14661_SHDW2);
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return mask;
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}
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////////////////////////////////////////////////////////////
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bool MAX14661::openShadowChannelA(uint8_t channel)
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{
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if (channel > 15) return false;
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uint8_t ch = channel;
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uint8_t reg = MAX14661_SHDW0;
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if (ch > 7)
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{
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reg = MAX14661_SHDW1;
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ch -= 8;
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}
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uint8_t mask = readRegister(reg);
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mask |= (1 << ch);
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writeRegister(reg, mask);
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return true;
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}
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bool MAX14661::closeShadowChannelA(uint8_t channel)
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{
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if (channel > 15) return false;
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uint8_t ch = channel;
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uint8_t reg = MAX14661_SHDW0;
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if (ch > 7)
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{
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reg = MAX14661_SHDW1;
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ch -= 8;
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}
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uint8_t mask = readRegister(reg);
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mask &= ~(1 << ch);
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writeRegister(reg, mask);
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return true;
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}
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bool MAX14661::isOpenShadowChannelA(uint8_t channel)
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{
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if (channel > 15) return false;
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uint8_t ch = channel;
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uint8_t reg = MAX14661_SHDW0;
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if (ch > 7)
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{
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reg = MAX14661_SHDW1;
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ch -= 8;
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}
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uint8_t mask = readRegister(reg);
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return (mask & (1 << ch)) > 0;
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}
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bool MAX14661::openShadowChannelB(uint8_t channel)
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{
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if (channel > 15) return false;
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uint8_t ch = channel;
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uint8_t reg = MAX14661_SHDW0;
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if (ch > 7)
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{
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reg = MAX14661_SHDW1;
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ch -= 8;
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}
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uint8_t mask = readRegister(reg);
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mask |= (1 << ch);
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writeRegister(reg, mask);
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return true;
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}
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bool MAX14661::closeShadowChannelB(uint8_t channel)
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{
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if (channel > 15) return false;
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uint8_t ch = channel;
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uint8_t reg = MAX14661_SHDW2;
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if (ch > 7)
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{
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reg = MAX14661_SHDW3;
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ch -= 8;
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}
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uint8_t mask = readRegister(reg);
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mask &= ~(1 << ch);
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writeRegister(reg, mask);
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return true;
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}
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bool MAX14661::isOpenShadowChannelB(uint8_t channel)
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{
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if (channel > 15) return false;
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uint8_t ch = channel;
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uint8_t reg = MAX14661_SHDW2;
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if (ch > 7)
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{
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reg = MAX14661_SHDW3;
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ch -= 8;
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}
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uint8_t mask = readRegister(reg);
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return (mask & (1 << ch)) > 0;
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}
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/////////////////////////////////////////////////////////
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//
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// MUX INTERFACE
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//
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void MAX14661::MUXA(uint8_t channel)
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{
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uint8_t ch = channel;
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if (channel > 15) ch = 0x10;
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writeRegister(MAX14661_CMD_A, ch);
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}
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uint8_t MAX14661::getMUXA()
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{
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uint8_t ch = readRegister(MAX14661_CMD_A);
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if ((ch & 0x10) == 0) return (ch & 0x0F);
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return 255;
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}
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void MAX14661::MUXB(uint8_t channel)
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{
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uint8_t ch = channel;
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if (channel > 15) ch = 0x10;
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writeRegister(MAX14661_CMD_B, ch);
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}
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uint8_t MAX14661::getMUXB()
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{
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uint8_t ch = readRegister(MAX14661_CMD_B);
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if ((ch & 0x10) == 0) return (ch & 0x0F);
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return 255;
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}
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/////////////////////////////////////////////////////////
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//
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// FULL CONTROL
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//
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bool MAX14661::openA(uint8_t channel)
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{
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if (channel > 15) return false;
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uint8_t ch = channel;
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uint8_t reg = MAX14661_DIR0;
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if (ch > 7)
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{
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reg = MAX14661_DIR1;
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ch -= 8;
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}
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uint8_t mask = readRegister(reg);
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mask |= (1 << ch);
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writeRegister(reg, mask);
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return true;
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}
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bool MAX14661::openB(uint8_t channel)
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{
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if (channel > 15) return false;
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uint8_t ch = channel;
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uint8_t reg = MAX14661_DIR2;
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if (ch > 7)
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{
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reg = MAX14661_DIR3;
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ch -= 8;
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}
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uint8_t mask = readRegister(reg);
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mask |= (1 << ch);
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writeRegister(reg, mask);
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return true;
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}
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bool MAX14661::closeA(uint8_t channel)
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{
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if (channel > 15) return false;
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uint8_t ch = channel;
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uint8_t reg = MAX14661_DIR0;
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if (ch > 7)
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{
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reg = MAX14661_DIR1;
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ch -= 8;
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}
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uint8_t mask = readRegister(reg);
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mask &= ~(1 << ch);
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writeRegister(reg, mask);
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return true;
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}
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bool MAX14661::closeB(uint8_t channel)
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{
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if (channel > 15) return false;
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uint8_t ch = channel;
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uint8_t reg = MAX14661_DIR2;
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if (ch > 7)
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{
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reg = MAX14661_DIR3;
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ch -= 8;
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}
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uint8_t mask = readRegister(reg);
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mask &= ~(1 << ch);
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writeRegister(reg, mask);
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return true;
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}
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/////////////////////////////////////////////////////////
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//
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// LOW LEVEL CONTROL
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//
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uint8_t MAX14661::readRegister(uint8_t reg)
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{
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_wire->beginTransmission(_address);
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_wire->write(reg);
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_error = _wire->endTransmission();
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if (_error != 0)
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{
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// set MAX14661_ERR_I2C
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return 0;
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}
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if (_wire->requestFrom(_address, (uint8_t)1) != 1)
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{
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_error = -1;
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return 0;
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}
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return _wire->read();
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}
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int MAX14661::writeRegister(uint8_t reg, uint8_t value)
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{
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_wire->beginTransmission(_address);
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_wire->write(reg);
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_wire->write(value);
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_error = _wire->endTransmission();
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// set MAX14661_ERR_I2C
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return _error;
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}
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int MAX14661::lastError()
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{
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int e = _error;
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_error = MAX14661_OK;
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return e;
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}
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// -- END OF FILE --
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