amiro-lld / drivers / PCAL6524 / v1 / alld_PCAL6524.c @ ed9a1bf5
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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..2020 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.c
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* @brief GPIO extender function implementations.
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*
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* @addtogroup lld_gpioext
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* @{
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*/
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#include <alld_PCAL6524.h> |
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#include <string.h> |
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/******************************************************************************/
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/* LOCAL DEFINITIONS */
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/******************************************************************************/
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#define MAXIMUM_GROUP_SIZE 6 |
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/******************************************************************************/
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/* EXPORTED VARIABLES */
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/******************************************************************************/
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/******************************************************************************/
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/* LOCAL TYPES */
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/******************************************************************************/
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/******************************************************************************/
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/* LOCAL VARIABLES */
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/******************************************************************************/
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/******************************************************************************/
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/* LOCAL FUNCTIONS */
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/******************************************************************************/
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/******************************************************************************/
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/* EXPORTED FUNCTIONS */
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/******************************************************************************/
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/**
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* @brief Returns the size of the group for a specified command.
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*
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* @param[in] cmd Command to retrieve the group size for.
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*
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* @return The size of the group in bytes.
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*/
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uint8_t pcal6524_lld_cmd_groupsize(const pcal6524_lld_cmd_t cmd)
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{
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switch (cmd) {
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case PCAL6524_LLD_CMD_OUTPUTCONFIGURATION:
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case PCAL6524_LLD_CMD_SWITCHDEBOUNCECOUNT:
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return 1; |
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case PCAL6524_LLD_CMD_SWITCHDEBOUNCEENABLE_P0:
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case PCAL6524_LLD_CMD_SWITCHDEBOUNCEENABLE_P1:
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return 2; |
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case PCAL6524_LLD_CMD_INPUT_P0:
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case PCAL6524_LLD_CMD_INPUT_P1:
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case PCAL6524_LLD_CMD_INPUT_P2:
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case PCAL6524_LLD_CMD_OUTPUT_P0:
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case PCAL6524_LLD_CMD_OUTPUT_P1:
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case PCAL6524_LLD_CMD_OUTPUT_P2:
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case PCAL6524_LLD_CMD_POLARITYINVERSION_P0:
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case PCAL6524_LLD_CMD_POLARITYINVERSION_P1:
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case PCAL6524_LLD_CMD_POLARITYINVERSION_P2:
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case PCAL6524_LLD_CMD_CONFIGURATION_P0:
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case PCAL6524_LLD_CMD_CONFIGURATION_P1:
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case PCAL6524_LLD_CMD_CONFIGURATION_P2:
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case PCAL6524_LLD_CMD_INPUTLATCH_P0:
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case PCAL6524_LLD_CMD_INPUTLATCH_P1:
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case PCAL6524_LLD_CMD_INPUTLATCH_P2:
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case PCAL6524_LLD_CMD_PUPDENABLE_P0:
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case PCAL6524_LLD_CMD_PUPDENABLE_P1:
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case PCAL6524_LLD_CMD_PUPDENABLE_P2:
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case PCAL6524_LLD_CMD_PUPDSELECTION_P0:
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case PCAL6524_LLD_CMD_PUPDSELECTION_P1:
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case PCAL6524_LLD_CMD_PUPDSELECTION_P2:
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case PCAL6524_LLD_CMD_INTERRUPTMASK_P0:
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case PCAL6524_LLD_CMD_INTERRUPTMASK_P1:
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case PCAL6524_LLD_CMD_INTERRUPTMASK_P2:
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case PCAL6524_LLD_CMD_INTERRUPTSTATUS_P0:
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case PCAL6524_LLD_CMD_INTERRUPTSTATUS_P1:
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case PCAL6524_LLD_CMD_INTERRUPTSTATUS_P2:
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case PCAL6524_LLD_CMD_INTERRUPTCLEAR_P0:
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case PCAL6524_LLD_CMD_INTERRUPTCLEAR_P1:
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case PCAL6524_LLD_CMD_INTERRUPTCLEAR_P2:
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case PCAL6524_LLD_CMD_INPUTSTATUS_P0:
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case PCAL6524_LLD_CMD_INPUTSTATUS_P1:
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case PCAL6524_LLD_CMD_INPUTSTATUS_P2:
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case PCAL6524_LLD_CMD_INDIVIDUALPINOUTPUTCONFIGURATION_P0:
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case PCAL6524_LLD_CMD_INDIVIDUALPINOUTPUTCONFIGURATION_P1:
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case PCAL6524_LLD_CMD_INDIVIDUALPINOUTPUTCONFIGURATION_P2:
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return 3; |
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case PCAL6524_LLD_CMD_OUTPUTDRIVESTRENGTH_P0A:
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case PCAL6524_LLD_CMD_OUTPUTDRIVESTRENGTH_P0B:
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case PCAL6524_LLD_CMD_OUTPUTDRIVESTRENGTH_P1A:
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case PCAL6524_LLD_CMD_OUTPUTDRIVESTRENGTH_P1B:
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case PCAL6524_LLD_CMD_OUTPUTDRIVESTRENGTH_P2A:
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case PCAL6524_LLD_CMD_OUTPUTDRIVESTRENGTH_P2B:
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case PCAL6524_LLD_CMD_INTERRUPTEDGE_P0A:
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case PCAL6524_LLD_CMD_INTERRUPTEDGE_P0B:
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case PCAL6524_LLD_CMD_INTERRUPTEDGE_P1A:
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case PCAL6524_LLD_CMD_INTERRUPTEDGE_P1B:
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case PCAL6524_LLD_CMD_INTERRUPTEDGE_P2A:
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case PCAL6524_LLD_CMD_INTERRUPTEDGE_P2B:
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return 6; |
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} |
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// must never occur
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apalDbgAssert(false);
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return 0; |
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} |
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/*============================================================================*/
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/* general register access */
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/*============================================================================*/
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// Reading the ID is currently not supported, since the required I²C sequence can not trivially executed via periphAL and ChibiOS/HAL.
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///**
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// * @brief Read device ID and manufacturer information.
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// *
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// * @param[in] pcal6524d The PCAL6524 driver to use.
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// * @param[out] info Pointer where to store the information data.
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// * @param[in] timeout Timeout for the function to return.
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// *
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// * @return Indicator whether the function call was successful or a timeout occurred.
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// */
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//apalExitStatus_t pcal6524_lld_read_id(const PCAL6524Driver* const pcal6524d, pcal6524_lld_deviceid_t* const info, const apalTime_t timeout)
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//{
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// apalDbgAssert(pcal6524d != NULL && pcal6524d->i2cd != NULL);
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// apalDbgAssert(info != NULL);
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//
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// const uint8_t txbuf = (uint8_t)pcal6524d->addr;
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// return apalI2CMasterTransmit(pcal6524d->i2cd, PCAL6524_LLD_I2C_ADDR_DEVICEID, &txbuf, 1, info->raw, sizeof(info->raw), timeout);
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//}
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/**
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* @brief Read 8bit data from any register.
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*
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* @param[in] pcal6524d The PCAL6524 driver to use.
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* @param[in] reg Command register to read.
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* @param[out] data Pointer to store the register data to.
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* @param[in] timeout Timeout for the function to return (in microseconds).
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*
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* @return Indicator whether the function call was successful or a timeout occurred.
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*/
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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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{
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apalDbgAssert(pcal6524d != NULL && pcal6524d->i2cd != NULL); |
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apalDbgAssert(data != NULL);
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const uint8_t txbuf = (uint8_t)reg;
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return apalI2CMasterTransmit(pcal6524d->i2cd, pcal6524d->addr, &txbuf, 1, data, 1, timeout); |
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} |
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/**
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* @brief Write 8bit data to any (writable) register.
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*
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* @param[in] pcal6524d The PCAL6524 driver to use.
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* @param[in] reg Command register to write to.
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* @param[in] data Data to transmit.
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* @param[in] timeout Timout for the function to return (in microseconds).
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*
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* @return Indicator whether the function call was successful or a timeout occurred.
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*/
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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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{
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apalDbgAssert(pcal6524d != NULL && pcal6524d->i2cd != NULL); |
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uint8_t txbuf[2] = { (uint8_t)reg, data };
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return apalI2CMasterTransmit(pcal6524d->i2cd, pcal6524d->addr, txbuf, 2, NULL, 0, timeout); |
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} |
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/**
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* @brief Read register group starting with an arbitrary register.
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*
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* @param[in] pcal6524d The PCAL6524 driver to use.
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* @param[in] reg Command register to start at.
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* @param[out] data Pointer to store rhe group data to.
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* The reqired number of bytes depends on the group.
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* @param[in] timeout Timeout for the function to return (in microseconds).
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*
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* @return Indicator whether the function call was successful or a timeout occurred.
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*/
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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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{
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apalDbgAssert(pcal6524d != NULL && pcal6524d->i2cd != NULL); |
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apalDbgAssert(data != NULL);
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const uint8_t txbuf = (uint8_t)reg;
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return apalI2CMasterTransmit(pcal6524d->i2cd, pcal6524d->addr, &txbuf, 1, data, pcal6524_lld_cmd_groupsize(reg), timeout); |
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} |
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/**
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* @brief Write register group data to any (writable) register.
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*
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* @param[in] pcal6524d The PCAL6524 driver to use.
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* @param[in] reg Command register to start at.
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* @param[in] data Data to transmit.
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* The reqired number of bytes depends on the group.
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* @param[in] timeout Timout for the function to return (in microseconds).
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*
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* @return Indicator whether the function call was successful or a timeout occurred.
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*/
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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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{
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apalDbgAssert(pcal6524d != NULL && pcal6524d->i2cd != NULL); |
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apalDbgAssert(data != NULL);
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uint8_t txbuf[MAXIMUM_GROUP_SIZE + 1] = {(uint8_t)reg};
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memcpy(&txbuf[1], data, pcal6524_lld_cmd_groupsize(reg));
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return apalI2CMasterTransmit(pcal6524d->i2cd, pcal6524d->addr, txbuf, pcal6524_lld_cmd_groupsize(reg) + 1, NULL, 0, timeout); |
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} |
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/**
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* @brief Read multiple registers continously, starting at an arbitrary one.
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*
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* @param[in] pcal6524d The PCAL6524 driver to use.
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* @param[in] reg Command register to start at.
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* @param[out] data Pointer to store the group data to.
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* @param[in] length Number of registers/bytes to read.
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* @param[in] timeout Timeout for the function to return (in microseconds).
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*
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* @return Indicator whether the function call was successful or a timeout occurred.
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*/
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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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{
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apalDbgAssert(pcal6524d != NULL && pcal6524d->i2cd != NULL); |
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apalDbgAssert(data != NULL);
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apalDbgAssert(length <= PCAL6524_LLD_NUM_REGISTERS); |
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uint8_t txbuf = (uint8_t)reg | PCAL6524_LLD_CMD_AUTOINCREMENT; |
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return apalI2CMasterTransmit(pcal6524d->i2cd, pcal6524d->addr, &txbuf, 1, data, length, timeout); |
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} |
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/**
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* @brief Write multiple registers continously, starting at an arbitrary one.
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*
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* @param[in] pcal6524d The PCAL6524 driver to use.
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* @param[in] reg Command register to start at.
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* @param[in] data Pointer to the data to write.
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* @param[in] length Number of registers/bytes to write.
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* @param[in] timeout Timeout for the function to return (in microseconds).
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*
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* @return Indicator whether the function call was successful or a timeout occurred.
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*/
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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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{
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apalDbgAssert(pcal6524d != NULL && pcal6524d->i2cd != NULL); |
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apalDbgAssert(data != NULL);
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apalDbgAssert(length <= PCAL6524_LLD_NUM_REGISTERS); |
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uint8_t txbuf[PCAL6524_LLD_NUM_REGISTERS + 1] = {(uint8_t)reg | PCAL6524_LLD_CMD_AUTOINCREMENT};
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memcpy(&txbuf[1], data, length);
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return apalI2CMasterTransmit(pcal6524d->i2cd, pcal6524d->addr, txbuf, length + 1, NULL, 0, timeout); |
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} |
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/** @} */
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