amiro-lld / drivers / PCAL6524 / v1 / alld_PCAL6524.h @ 4dba9195
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/*
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AMiRo-LLD is a compilation of low-level hardware drivers for the Autonomous Mini Robot (AMiRo) platform.
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Copyright (C) 2016..2019 Thomas Schöpping et al.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* @file alld_PCAL6524.h
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* @brief GPIO extender macros and structures.
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*
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* @addtogroup lld_gpioext
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* @{
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*/
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#ifndef AMIROLLD_PCAL6524_H
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#define AMIROLLD_PCAL6524_H
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#include <amiro-lld.h> |
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/******************************************************************************/
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/* CONSTANTS */
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/******************************************************************************/
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/**
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* @brief Maximum I2C frequency.
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*/
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#define PCAL6524_LLD_I2C_MAXFREQUENCY 1000000 |
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/**
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* @brief A falling edge indicats an interrupt.
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*/
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#define PCAL6524_LLD_INT_EDGE APAL_GPIO_EDGE_FALLING
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/******************************************************************************/
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/* SETTINGS */
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/******************************************************************************/
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/******************************************************************************/
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/* CHECKS */
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/******************************************************************************/
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/******************************************************************************/
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/* DATA STRUCTURES AND TYPES */
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/******************************************************************************/
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/**
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* @brief The PCAL6524Driver sruct.
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*/
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typedef struct { |
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apalI2CDriver_t* i2cd; |
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apalI2Caddr_t addr; |
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} PCAL6524Driver; |
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/**
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* @brief Possible I2C address configurations.
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*/
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enum {
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PCAL6524_LLD_I2C_ADDR_FIXED = 0x0020u, /**< Fixed part of the I2C address. */ |
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PCAL6524_LLD_I2C_ADDR_SCL = 0x0020u, /**< ADDR pin connected to SCL. */ |
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PCAL6524_LLD_I2C_ADDR_SDA = 0x0021u, /**< ADDR pin connected to SDA. */ |
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PCAL6524_LLD_I2C_ADDR_VSS = 0x0022u, /**< ADDR pin connected to VSS. */ |
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PCAL6524_LLD_I2C_ADDR_VDD = 0x0023u, /**< ADDR pin connected to VDD. */ |
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PCAL6524_LLD_I2C_ADDR_DEVICEID = 0x007Cu, /**< Special address to read device ID information. */ |
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}; |
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/**
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* @brief Command bit to enable auto-incrementation of command value.
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* @details Can be added (ORed) to any command value.
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*/
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#define PCAL6524_LLD_CMD_AUTOINCREMENT 0x80u |
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/**
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* @brief The total number of registers that can be accessed.
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* @note This is the maximum number of bytes that may be read or written continuously.
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*/
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#define PCAL6524_LLD_NUM_REGISTERS 52 |
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typedef union { |
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uint8_t raw[3];
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struct {
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uint16_t name : 12;
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uint16_t part : 9;
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uint8_t revision : 3;
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}; |
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} pcal6524_lld_deviceid_t; |
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/**
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* @brief Control commands for the PCAL6524.
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*/
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typedef enum { |
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PCAL6524_LLD_CMD_INPUT_P0 = 0x00u, /**< read only */ |
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PCAL6524_LLD_CMD_INPUT_P1 = 0x01u, /**< read only */ |
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PCAL6524_LLD_CMD_INPUT_P2 = 0x02u, /**< read only */ |
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PCAL6524_LLD_CMD_OUTPUT_P0 = 0x04u, /**< read/write */ |
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PCAL6524_LLD_CMD_OUTPUT_P1 = 0x05u, /**< read/write */ |
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PCAL6524_LLD_CMD_OUTPUT_P2 = 0x06u, /**< read/write */ |
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PCAL6524_LLD_CMD_POLARITYINVERSION_P0 = 0x08u, /**< read/write */ |
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PCAL6524_LLD_CMD_POLARITYINVERSION_P1 = 0x09u, /**< read/write */ |
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PCAL6524_LLD_CMD_POLARITYINVERSION_P2 = 0x0Au, /**< read/write */ |
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PCAL6524_LLD_CMD_CONFIGURATION_P0 = 0x0Cu, /**< read/write */ |
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PCAL6524_LLD_CMD_CONFIGURATION_P1 = 0x0Du, /**< read/write */ |
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PCAL6524_LLD_CMD_CONFIGURATION_P2 = 0x0Eu, /**< read/write */ |
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PCAL6524_LLD_CMD_OUTPUTDRIVESTRENGTH_P0A = 0x40u, /**< read/write */ |
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PCAL6524_LLD_CMD_OUTPUTDRIVESTRENGTH_P0B = 0x41u, /**< read/write */ |
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PCAL6524_LLD_CMD_OUTPUTDRIVESTRENGTH_P1A = 0x42u, /**< read/write */ |
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PCAL6524_LLD_CMD_OUTPUTDRIVESTRENGTH_P1B = 0x43u, /**< read/write */ |
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PCAL6524_LLD_CMD_OUTPUTDRIVESTRENGTH_P2A = 0x44u, /**< read/write */ |
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PCAL6524_LLD_CMD_OUTPUTDRIVESTRENGTH_P2B = 0x45u, /**< read/write */ |
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PCAL6524_LLD_CMD_INPUTLATCH_P0 = 0x48u, /**< read/write */ |
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PCAL6524_LLD_CMD_INPUTLATCH_P1 = 0x49u, /**< read/write */ |
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PCAL6524_LLD_CMD_INPUTLATCH_P2 = 0x4Au, /**< read/write */ |
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PCAL6524_LLD_CMD_PUPDENABLE_P0 = 0x4Cu, /**< read/write */ |
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PCAL6524_LLD_CMD_PUPDENABLE_P1 = 0x4Du, /**< read/write */ |
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PCAL6524_LLD_CMD_PUPDENABLE_P2 = 0x4Eu, /**< read/write */ |
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PCAL6524_LLD_CMD_PUPDSELECTION_P0 = 0x50u, /**< read/write */ |
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PCAL6524_LLD_CMD_PUPDSELECTION_P1 = 0x51u, /**< read/write */ |
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PCAL6524_LLD_CMD_PUPDSELECTION_P2 = 0x52u, /**< read/write */ |
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PCAL6524_LLD_CMD_INTERRUPTMASK_P0 = 0x54u, /**< read/write */ |
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PCAL6524_LLD_CMD_INTERRUPTMASK_P1 = 0x55u, /**< read/write */ |
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PCAL6524_LLD_CMD_INTERRUPTMASK_P2 = 0x56u, /**< read/write */ |
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PCAL6524_LLD_CMD_INTERRUPTSTATUS_P0 = 0x58u, /**< read only */ |
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PCAL6524_LLD_CMD_INTERRUPTSTATUS_P1 = 0x59u, /**< read only */ |
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PCAL6524_LLD_CMD_INTERRUPTSTATUS_P2 = 0x5Au, /**< read only */ |
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PCAL6524_LLD_CMD_OUTPUTCONFIGURATION = 0x5Cu, /**< read/write */ |
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PCAL6524_LLD_CMD_INTERRUPTEDGE_P0A = 0x60u, /**< read/write */ |
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PCAL6524_LLD_CMD_INTERRUPTEDGE_P0B = 0x61u, /**< read/write */ |
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PCAL6524_LLD_CMD_INTERRUPTEDGE_P1A = 0x62u, /**< read/write */ |
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PCAL6524_LLD_CMD_INTERRUPTEDGE_P1B = 0x63u, /**< read/write */ |
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PCAL6524_LLD_CMD_INTERRUPTEDGE_P2A = 0x64u, /**< read/write */ |
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PCAL6524_LLD_CMD_INTERRUPTEDGE_P2B = 0x65u, /**< read/write */ |
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PCAL6524_LLD_CMD_INTERRUPTCLEAR_P0 = 0x68u, /**< write only */ |
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PCAL6524_LLD_CMD_INTERRUPTCLEAR_P1 = 0x69u, /**< write only */ |
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PCAL6524_LLD_CMD_INTERRUPTCLEAR_P2 = 0x6Au, /**< write only */ |
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PCAL6524_LLD_CMD_INPUTSTATUS_P0 = 0x6Cu, /**< read only */ |
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PCAL6524_LLD_CMD_INPUTSTATUS_P1 = 0x6Du, /**< read only */ |
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PCAL6524_LLD_CMD_INPUTSTATUS_P2 = 0x6Eu, /**< read only */ |
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PCAL6524_LLD_CMD_INDIVIDUALPINOUTPUTCONFIGURATION_P0 = 0x70u, /**< read/write */ |
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PCAL6524_LLD_CMD_INDIVIDUALPINOUTPUTCONFIGURATION_P1 = 0x71u, /**< read/write */ |
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PCAL6524_LLD_CMD_INDIVIDUALPINOUTPUTCONFIGURATION_P2 = 0x72u, /**< read/write */ |
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PCAL6524_LLD_CMD_SWITCHDEBOUNCEENABLE_P0 = 0x74u, /**< read/write */ |
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PCAL6524_LLD_CMD_SWITCHDEBOUNCEENABLE_P1 = 0x75u, /**< read/write */ |
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PCAL6524_LLD_CMD_SWITCHDEBOUNCECOUNT = 0x76u, /**< read/write */ |
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} pcal6524_lld_cmd_t; |
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/**
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* @brief Input register bit values.
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* @details The bits in the input register reflect the incoming logic levels per pin.
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* If a pin is configured as ouput, the bit reflects th set value or is forced to 0 in case the outpus is configured as open-drain.
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* If a pin is configured as input with latched interrupts, reading the according port will reset the input value and clear the interrupt.
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*/
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typedef enum { |
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PCAL6524_LLD_INPUT_LOW = 0b0,
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PCAL6524_LLD_INPUT_HIGH = 0b1,
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} pcal6524_lld_input_t; |
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/**
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* @brief Output register bit values.
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* @details Defines the logic level to be driven by output pins.
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* The default value (after reset) is 0b1 (high),
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*/
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typedef enum { |
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PCAL6524_LLD_OUTPUT_LOW = 0b0,
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PCAL6524_LLD_OUTPUT_HIGH = 0b1,
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} pcal6524_lld_output_t; |
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/**
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* @brief Polarity inversion register values.
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* @details Allows to inverse the logic values written to the input register.
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* The default value (after reset) is 0b0 (disabled).
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*/
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typedef enum { |
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PCAL6524_LLD_POLARITYINVERSION_DISABLED = 0b0,
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PCAL6524_LLD_POLARITYINVERSION_ENABLED = 0b1,
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} pcal6524_lld_polarityinversion_t; |
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/**
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* @brief Configuration regsiter bit values.
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* @details Configures the direction of the I/O pins to either high-impedance input or output.
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* The default value (after reset) is 0b1 (input).
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*/
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typedef enum { |
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PCAL6524_LLD_CONFIGURATION_INPUT = 0b1,
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PCAL6524_LLD_CONFIGURATION_OUTPUT = 0b0,
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} pcal6524_lld_configuration_t; |
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/**
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* @brief Output drive strength register mask values.
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* @details Configures maximum current of output pins can be defined via a 2 bit mask per pin.
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* Toggling multiple output pins simultaneously a peak current may induce noise to supply voltage and ground.
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* By lowering the maximum current per pin. this effect can be minimized.
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* The default value (after reset) is 0b11 (factor 1x)
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*/
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typedef enum { |
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PCAL6524_LL_OUTPUTDRIVESTRENGTH_0_25 = 0b00,
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PCAL6524_LL_OUTPUTDRIVESTRENGTH_0_5 = 0b01,
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PCAL6524_LL_OUTPUTDRIVESTRENGTH_0_75 = 0b10,
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PCAL6524_LL_OUTPUTDRIVESTRENGTH_1 = 0b11,
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} pcal6524_lld_outputdrivestrength_t; |
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/**
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* @brief Input latch register bit values.
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* @details Allows to latch interrupt and input states per pin, if an interrupt occurred.
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* The default value (after reset) is 0b0 (disabled).
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*/
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typedef enum { |
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PCAL6524_LLD_INPUTLATCH_ENABLED = 0b1,
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PCAL6524_LLD_INPUTLATCH_DISABLED = 0b0,
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} pcal6524_lld_inputlatch_t; |
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/**
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* @brief Pull-up/Pull-down enable register bis values.
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* @details Configures per pin whether the pull-up/pull-down resistors shall be enabled.
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* If a pin is configured as open-drain output, the setting in this register are overridden and the resistors are disconnected.
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* The default value (after reset) is 0b0 (disabled).
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*/
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typedef enum { |
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PCAL6524_LLD_PUPD_ENABLED = 0b1,
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PCAL6524_LLD_PUPD_DISABLED = 0b0,
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} pcal6524_lld_pupdenable_t; |
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/**
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* @brief Pull-up/Pull-dpwn selection register bit values.
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* @details Selects between pull-up and pull-down resistor (100 kΩ) per pin.
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* Has no effect if the according bit is the pull-up/pull-down enable register is disabled.
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* The default value (after reset) is 0b1 (pull-up).
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*/
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typedef enum { |
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PCAL6524_LLD_PUPDSELECTION_PULLUP = 0b1,
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PCAL6524_LLD_PUPDSELECTION_PULLDOWN = 0b0,
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} pcal6524_lld_pupdselection_t; |
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/**
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* @brief Interrupt mask register bit values.
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* @details Allows to enable (value 0) or disable (value 1) interrupts per pin.
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* The default value (after reset) is 0b1 (interrupt disabled).
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*/
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typedef enum { |
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PCAL6524_LLD_INTERRUPTMASK_ENABLED = 0b0,
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PCAL6524_LLD_INTERRUPTMASK_DSIABLED = 0b1,
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} pcal6524_lld_interruptmask_t; |
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/**
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* @brief Interrupt status register bit value.
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* @details Indicates whether an interrupt occurred per pin.
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* After reset the register is initialized with 0b0 (no interrupt occurred yet).
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*/
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typedef enum { |
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PCAL6524_LLD_INTERRUPTSTATUS_ACTIVE = 0b1,
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PCAL6524_LLD_INTERRUPTSTATUS_INACTIVE = 0b0,
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} pcal6542_lld_interruptstatus_t; |
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/**
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* @brief Output port configuration register mask of valid bits.
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*/
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#define PCAL6524_LLD_OUTPUTCONFIGURATION_MASK 0x07u |
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/**
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* @brief Output port configuration register mask for I/O port 0.
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*/
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#define PCAL6524_LLD_OUTPUTCONFIGURATION_MASK_PORT0 0x01u |
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/**
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* @brief Output port configuration register mask for I/O port 1.
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*/
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#define PCAL6524_LLD_OUTPUTCONFIGURATION_MASK_PORT1 0x02u |
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/**
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* @brief Output port configuration register mask for I/O port 2.
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*/
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#define PCAL6524_LLD_OUTPUTCONFIGURATION_MASK_PORT2 0x04u |
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/**
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* @brief Output port configuration register bit values.
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* @details Configures all ouput pins per port to be push-pull or open-drain.
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* The default value (after reset) is 0b0 (push-pull).
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*/
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typedef enum { |
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PCAL6524_LLD_OUTPUTCONFIGURATION_PUSHPULL = 0b0,
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PCAL6524_LLD_OUTPUTCONFIGURATION_OPENDRAIN = 0b1,
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} pcal6524_lld_outputconfiguration_t; |
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/**
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* @brief Interrupt edge register mask values.
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* @details Configures the type of event that would cause an interrupt per pin.
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* The default value (after reset) is 0b00 (level triggered).
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*/
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typedef enum { |
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PCAL6524_LLD_INTERRUPTEDGE_LEVELTRIGGERED = 0b00,
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PCAL6524_LLD_INTERRUPTEDGE_RISINGEDGE = 0b01,
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PCAL6524_LLD_INTERRUPTEDGE_FALLINGEDGE = 0b10,
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PCAL6524_LLD_INTERRUPTEDGE_ANYEDGE = 0b11,
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} pcal6524_lld_interruptedge_t; |
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/**
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* @brief Input status register bit values.
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* @details Reflects the current logic level per pin similar to the input register.
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* However, values are not latched and reading the register will not reset interrupts.
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*/
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typedef enum { |
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PCAL6524_LLD_INPUTSTATUS_LOW = 0b0,
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PCAL6524_LLD_INPUTSTATUS_HIGH = 0b1,
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} pcal6524_lld_inputstatus_t; |
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/**
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* @brief Individual pin output configuration register bit values.
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* @details Can be used to invert the port-wide push-pull/open-drain configuration via the ouput port configuration register per pin.
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* the default value (after reset) is 0b0 (not inverted).
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*/
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typedef enum { |
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PCAL6524_LLD_INDIVIDUALPINOUTPUTCONFIGURATION_PORT = 0b0,
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PCAL6524_LLD_INDIVIDUALPINOUTPUTCONFIGURATION_INVERTED = 0b1,
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} pcal6524_lld_individualpinoutputconfiguration_t; |
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/**
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* @brief Switch debounce enable register bit values.
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* @details Allows to enable debounce functionality for I/O ports 0 and 1.
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* In order to use the debounce feature, an oscillator signal must be applied to pin 0 of port 0.
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* The default value (after reset) is 0b0 (disabled).
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*/
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typedef enum { |
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PCAL6524_LLD_SWITCHDEBOUNCE_ENABLED = 0b1,
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PCAL6524_LLD_SWITCHDEBOUNCE_DISABLED = 0b0,
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} pcal6524_lld_switchdebounceenable_t; |
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/******************************************************************************/
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/* MACROS */
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/******************************************************************************/
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/******************************************************************************/
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/* EXTERN DECLARATIONS */
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/******************************************************************************/
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#ifdef __cplusplus
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extern "C" { |
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#endif
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uint8_t pcal6524_lld_cmd_groupsize(const pcal6524_lld_cmd_t cmd);
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// apalExitStatus_t pcal6524_lld_read_id(const PCAL6524Driver* const pcal6524d, uint8_t* const data, const apalTime_t timeout);
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apalExitStatus_t pcal6524_lld_read_reg(const PCAL6524Driver* const pcal6524d, const pcal6524_lld_cmd_t reg, uint8_t* const data, const apalTime_t timeout); |
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apalExitStatus_t pcal6524_lld_write_reg(const PCAL6524Driver* const pcal6524d, const pcal6524_lld_cmd_t reg, const uint8_t data, const apalTime_t timeout); |
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apalExitStatus_t pcal6524_lld_read_group(const PCAL6524Driver* const pcal6524d, const pcal6524_lld_cmd_t reg, uint8_t* const data, const apalTime_t timeout); |
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apalExitStatus_t pcal6524_lld_write_group(const PCAL6524Driver* const pcal6524d, const pcal6524_lld_cmd_t reg, const uint8_t* const data, const apalTime_t timeout); |
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apalExitStatus_t pcal6524_lld_read_continuous(const PCAL6524Driver* const pcal6524d, const pcal6524_lld_cmd_t reg, uint8_t* const data, const uint8_t length, const apalTime_t timeout); |
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apalExitStatus_t pcal6524_lld_write_continuous(const PCAL6524Driver* const pcal6524d, const pcal6524_lld_cmd_t reg, const uint8_t* const data, const uint8_t length, const apalTime_t timeout); |
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#ifdef __cplusplus
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} |
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#endif
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/******************************************************************************/
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/* INLINE FUNCTIONS */
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/******************************************************************************/
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#endif /* AMIROLLD_PCAL6524_H */ |
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| 367 |
/** @} */
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| 368 |
|