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package com.diozero.devices.mcp23xxx;
/*
* #%L
* Organisation: diozero
* Project: diozero - Core
* Filename: MCP23x17.java
*
* This file is part of the diozero project. More information about this project
* can be found at https://www.diozero.com/.
* %%
* Copyright (C) 2016 - 2021 diozero
* %%
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
* #L%
*/
import com.diozero.api.PinInfo;
import com.diozero.sbc.BoardPinInfo;
/**
* https://www.instructables.com/Arduino-NANO-Tests-2-MCP23S17-IO-Xpanders
*
*
*/
public abstract class MCP23x17 extends MCP23xxx {
private static final int NUM_PORTS = 2;
// Bank=0 Registers (the default)
private static final int BANK0_IODIRA = 0x00;
private static final int BANK0_IODIRB = 0x01;
private static final int[] BANK0_IODIR_REG = { BANK0_IODIRA, BANK0_IODIRB };
private static final int BANK0_IPOLA = 0x02;
private static final int BANK0_IPOLB = 0x03;
private static final int[] BANK0_IPOL_REG = { BANK0_IPOLA, BANK0_IPOLB };
private static final int BANK0_GPINTENA = 0x04;
private static final int BANK0_GPINTENB = 0x05;
private static final int[] BANK0_GPINTEN_REG = { BANK0_GPINTENA, BANK0_GPINTENB };
private static final int BANK0_DEFVALA = 0x06;
private static final int BANK0_DEFVALB = 0x07;
private static final int[] BANK0_DEFVAL_REG = { BANK0_DEFVALA, BANK0_DEFVALB };
private static final int BANK0_INTCONA = 0x08;
private static final int BANK0_INTCONB = 0x09;
private static final int[] BANK0_INTCON_REG = { BANK0_INTCONA, BANK0_INTCONB };
private static final int BANK0_IOCONA = 0x0a;
private static final int BANK0_IOCONB = 0x0b;
private static final int[] BANK0_IOCON_REG = { BANK0_IOCONA, BANK0_IOCONB };
private static final int BANK0_GPPUA = 0x0c;
private static final int BANK0_GPPUB = 0x0d;
private static final int[] BANK0_GPPU_REG = { BANK0_GPPUA, BANK0_GPPUB };
private static final int BANK0_INTFA = 0x0e;
private static final int BANK0_INTFB = 0x0f;
private static final int[] BANK0_INTF_REG = { BANK0_INTFA, BANK0_INTFB };
private static final int BANK0_INTCAPA = 0x10;
private static final int BANK0_INTCAPB = 0x11;
private static final int[] BANK0_INTCAP_REG = { BANK0_INTCAPA, BANK0_INTCAPB };
private static final int BANK0_GPIOA = 0x12;
private static final int BANK0_GPIOB = 0x13;
private static final int[] BANK0_GPIO_REG = { BANK0_GPIOA, BANK0_GPIOB };
private static final int BANK0_OLATA = 0x14;
private static final int BANK0_OLATB = 0x15;
private static final int[] BANK0_OLAT_REG = { BANK0_OLATA, BANK0_OLATB };
// Bank=1 Registers
/*
private static final int BANK1_IODIRA = 0x00;
private static final int BANK1_IODIRB = 0x10;
private static final int[] BANK1_IODIR_REG = { BANK1_IODIRA, BANK1_IODIRB };
private static final int BANK1_IPOLA = 0x01;
private static final int BANK1_IPOLB = 0x11;
private static final int[] BANK1_IPOL_REG = { BANK1_IPOLA, BANK1_IPOLB };
private static final int BANK1_GPINTENA = 0x02;
private static final int BANK1_GPINTENB = 0x12;
private static final int[] BANK1_GPINTEN_REG = { BANK1_GPINTENA, BANK1_GPINTENB };
private static final int BANK1_DEFVALA = 0x03;
private static final int BANK1_DEFVALB = 0x13;
private static final int[] BANK1_DEFVAL_REG = { BANK1_DEFVALA, BANK1_DEFVALB };
private static final int BANK1_INTCONA = 0x04;
private static final int BANK1_INTCONB = 0x14;
private static final int[] BANK1_INTCON_REG = { BANK1_INTCONA, BANK1_INTCONB };
private static final int BANK1_IOCONA = 0x05;
private static final int BANK1_IOCONB = 0x15;
private static final int[] BANK1_IOCON_REG = { BANK1_IOCONA, BANK1_IOCONB };
private static final int BANK1_GPPUA = 0x06;
private static final int BANK1_GPPUB = 0x16;
private static final int[] BANK1_GPPU_REG = { BANK1_GPPUA, BANK1_GPPUB };
private static final int BANK1_INTFA = 0x07;
private static final int BANK1_INTFB = 0x17;
private static final int[] BANK1_INTF_REG = { BANK1_INTFA, BANK1_INTFB };
private static final int BANK1_INTCAPA = 0x08;
private static final int BANK1_INTCAPB = 0x18;
private static final int[] BANK1_INTCAP_REG = { BANK1_INTCAPA, BANK1_INTCAPB };
private static final int BANK1_GPIOA = 0x09;
private static final int BANK1_GPIOB = 0x19;
private static final int[] BANK1_GPIO_REG = { BANK1_GPIOA, BANK1_GPIOB };
private static final int BANK1_OLATA = 0x0a;
private static final int BANK1_OLATB = 0x1a;
private static final int[] BANK1_OLAT_REG = { BANK1_OLATA, BANK1_OLATB };
*/
/** Controls the direction of the data I/O. When a bit is set, the corresponding pin becomes an
* input. When a bit is clear, the corresponding pin becomes an output */
private static final int[] IODIR_REG = BANK0_IODIR_REG;
/** This register allows the user to configure the polarity on the corresponding GPIO port bits.
* If a bit is set, the corresponding GPIO register bit will reflect the inverted value on the pin */
private static final int[] IPOL_REG = BANK0_IPOL_REG;
/** The GPINTEN register controls the interrupt-on-change feature for each pin. If a bit is set,
* the corresponding pin is enabled for interrupt-on-change. The DEFVAL and INTCON registers
* must also be configured if any pins are enabled for interrupt-on-change */
private static final int[] GPINTEN_REG = BANK0_GPINTEN_REG;
/** The default comparison value is configured in the DEFVAL register. If enabled
* (via GPINTEN and INTCON) to compare against the DEFVAL register, an opposite
* value on the associated pin will cause an interrupt to occur */
private static final int[] DEFVAL_REG = BANK0_DEFVAL_REG;
/** The INTCON register controls how the associated pin value is compared for the
* interrupt-on-change feature. If a bit is set, the corresponding I/O pin is compared
* against the associated bit in the DEFVAL register. If a bit value is clear, the
* corresponding I/O pin is compared against the previous value */
private static final int[] INTCON_REG = BANK0_INTCON_REG;
/** I/O configuration register */
private static final int[] IOCON_REG = BANK0_IOCON_REG;
/** The GPPU register controls the pull-up resistors for the port pins. If a bit is
* set and the corresponding pin is configured as an input, the corresponding port pin is
* internally pulled up with a 100 kOhm resistor */
private static final int[] GPPU_REG = BANK0_GPPU_REG;
/** The INTF register reflects the interrupt condition on the port pins of any pin that is
* enabled for interrupts via the GPINTEN register. A 'set' bit indicates that the
* associated pin caused the interrupt. This register is 'read-only'. Writes to this
* register will be ignored */
private static final int[] INTF_REG = BANK0_INTF_REG;
/** The INTCAP register captures the GPIO port value at the time the interrupt occurred.
* The register is 'read-only' and is updated only when an interrupt occurs. The register
* will remain unchanged until the interrupt is cleared via a read of INTCAP or GPIO. */
private static final int[] INTCAP_REG = BANK0_INTCAP_REG;
/** The GPIO register reflects the value on the port. Reading from this register reads
* the port. Writing to this register modifies the Output Latch (OLAT) register */
private static final int[] GPIO_REG = BANK0_GPIO_REG;
/** The OLAT register provides access to the output latches. A read from this register
* results in a read of the OLAT and not the port itself. A write to this register
* modifies the output latches that modifies the pins configured as outputs */
private static final int[] OLAT_REG = BANK0_OLAT_REG;
private BoardPinInfo boardPinInfo;
public MCP23x17(String deviceName) {
this(deviceName, INTERRUPT_GPIO_NOT_SET, INTERRUPT_GPIO_NOT_SET);
}
public MCP23x17(String deviceName, int interruptGpio) {
this(deviceName, interruptGpio, interruptGpio);
}
public MCP23x17(String deviceName, int interruptGpioA, int interruptGpioB) {
super(NUM_PORTS, deviceName, interruptGpioA, interruptGpioB);
boardPinInfo = new MCP23x17BoardPinInfo();
}
@Override
protected int getIODirReg(int port) {
return IODIR_REG[port];
}
@Override
protected int getIPolReg(int port) {
return IPOL_REG[port];
}
@Override
protected int getGPIntEnReg(int port) {
return GPINTEN_REG[port];
}
@Override
protected int getDefValReg(int port) {
return DEFVAL_REG[port];
}
@Override
protected int getIntConReg(int port) {
return INTCON_REG[port];
}
@Override
protected int getIOConReg(int port) {
return IOCON_REG[port];
}
@Override
protected int getGPPullUpReg(int port) {
return GPPU_REG[port];
}
@Override
protected int getIntFReg(int port) {
return INTF_REG[port];
}
@Override
protected int getIntCapReg(int port) {
return INTCAP_REG[port];
}
@Override
protected int getGPIOReg(int port) {
return GPIO_REG[port];
}
@Override
protected int getOLatReg(int port) {
return OLAT_REG[port];
}
@Override
public BoardPinInfo getBoardPinInfo() {
return boardPinInfo;
}
public static class MCP23x17BoardPinInfo extends BoardPinInfo {
public static final String BANK_A = "BANK-A";
public static final String BANK_B = "BANK-B";
public MCP23x17BoardPinInfo() {
for (int i=0; i<8; i++) {
addGpioPinInfo(BANK_A, i, 21+i, PinInfo.DIGITAL_IN_OUT);
}
for (int i=0; i<8; i++) {
addGpioPinInfo(BANK_B, 8+i, 1+i, PinInfo.DIGITAL_IN_OUT);
}
}
}
}
