amiro-lld / drivers / AT42QT1050 / v1 / alld_AT42QT1050.h @ f0dd1ac4
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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_AT42QT1050.h
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* @brief Touch sensor macros and structures.
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*
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* @addtogroup lld_touch
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* @{
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*/
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#ifndef AMIROLLD_AT42QT1050_H
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#define AMIROLLD_AT42QT1050_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 AT42QT1050_LLD_I2C_MAXFREQUENCY 400000 |
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/**
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* @brief A falling edge indicats an interrupt.
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*/
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#define AT42QT1050_LLD_INT_EDGE APAL_GPIO_EDGE_FALLING
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/**
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* @brief Number of touch keys supported by AT42QT1050.
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*/
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#define AT42QT1050_LLD_NUM_KEYS 5 |
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/**
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* @brief Maximum time (in microseconds) to acquire all key signals before the overflow bit of the detection status register is set.
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*/
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#define AT42QT1050_LLD_MAX_KEY_ACQUIRATION_TIME 8000 |
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/**
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* @brief The chip ID as can be read from the according register (constant).
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*/
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#define AT42QT1050_LLD_CHIPID 0x46 |
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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 AT42QT1050Driver 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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} AT42QT1050Driver; |
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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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AT42QT1050_LLD_I2C_ADDRSEL_LOW = 0x0041u, /**< ADDR_SEL pin is pulled low. */ |
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AT42QT1050_LLD_I2C_ADDRSEL_HIGH = 0x0046u, /**< ADDR_SEL pin is pulled high. */ |
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}; |
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/**
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* @brief Available register addresses of the AT42QT1050.
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*/
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typedef enum { |
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AT42QT1050_LLD_REG_CHIPID = 0x00u, /**< read only */ |
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AT42QT1050_LLD_REG_FIRMWAREVERSION = 0x01u, /**< read only */ |
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AT42QT1050_LLD_REG_DETECTIONSTATUS = 0x02u, /**< read only */ |
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AT42QT1050_LLD_REG_KEYSTATUS = 0x03u, /**< read only */ |
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AT42QT1050_LLD_REG_KEYSIGNAL_0 = 0x06u, /**< read only */ |
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AT42QT1050_LLD_REG_KEYSIGNAL_1 = 0x08u, /**< read only */ |
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AT42QT1050_LLD_REG_KEYSIGNAL_2 = 0x0Du, /**< read only */ |
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AT42QT1050_LLD_REG_KEYSIGNAL_3 = 0x0Fu, /**< read only */ |
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AT42QT1050_LLD_REG_KEYSIGNAL_4 = 0x11u, /**< read only */ |
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AT42QT1050_LLD_REG_REFERENCEDATA_0 = 0x14u, /**< read only */ |
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AT42QT1050_LLD_REG_REFERENCEDATA_1 = 0x16u, /**< read only */ |
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AT42QT1050_LLD_REG_REFERENCEDATA_2 = 0x1Au, /**< read only */ |
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AT42QT1050_LLD_REG_REFERENCEDATA_3 = 0x1Cu, /**< read only */ |
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AT42QT1050_LLD_REG_REFERENCEDATA_4 = 0x1Eu, /**< read only */ |
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AT42QT1050_LLD_REG_NEGATIVETHRESHOLD_0 = 0x21u, /**< read/write */ |
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AT42QT1050_LLD_REG_NEGATIVETHRESHOLD_1 = 0x22u, /**< read/write */ |
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AT42QT1050_LLD_REG_NEGATIVETHRESHOLD_2 = 0x24u, /**< read/write */ |
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AT42QT1050_LLD_REG_NEGATIVETHRESHOLD_3 = 0x25u, /**< read/write */ |
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AT42QT1050_LLD_REG_NEGATIVETHRESHOLD_4 = 0x26u, /**< read/write */ |
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AT42QT1050_LLD_REG_PULSE_SCALE_0 = 0x28u, /**< read/write */ |
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AT42QT1050_LLD_REG_PULSE_SCALE_1 = 0x29u, /**< read/write */ |
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AT42QT1050_LLD_REG_PULSE_SCALE_2 = 0x2Bu, /**< read/write */ |
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AT42QT1050_LLD_REG_PULSE_SCALE_3 = 0x2Cu, /**< read/write */ |
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AT42QT1050_LLD_REG_PULSE_SCALE_4 = 0x2Du, /**< read/write */ |
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AT42QT1050_LLD_REG_INTEGRATOR_AKS_0 = 0x2Fu, /**< read/write */ |
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AT42QT1050_LLD_REG_INTEGRATOR_AKS_1 = 0x30u, /**< read/write */ |
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AT42QT1050_LLD_REG_INTEGRATOR_AKS_2 = 0x32u, /**< read/write */ |
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AT42QT1050_LLD_REG_INTEGRATOR_AKS_3 = 0x33u, /**< read/write */ |
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AT42QT1050_LLD_REG_INTEGRATOR_AKS_4 = 0x34u, /**< read/write */ |
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AT42QT1050_LLD_REG_CHARGESHAREDELAY_0 = 0x36u, /**< read/write */ |
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AT42QT1050_LLD_REG_CHARGESHAREDELAY_1 = 0x37u, /**< read/write */ |
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AT42QT1050_LLD_REG_CHARGESHAREDELAY_2 = 0x39u, /**< read/write */ |
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AT42QT1050_LLD_REG_CHARGESHAREDELAY_3 = 0x3Au, /**< read/write */ |
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AT42QT1050_LLD_REG_CHARGESHAREDELAY_4 = 0x3Bu, /**< read/write */ |
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AT42QT1050_LLD_REG_FINFOUTMAXCALGUARD = 0x3Cu, /**< read/write */ |
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AT42QT1050_LLD_REG_LOWPOWERMODE = 0x3Du, /**< read/write */ |
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AT42QT1050_LLD_REG_MAXONDURATION = 0x3Eu, /**< read/write */ |
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AT42QT1050_LLD_REG_RESET_CALIBRATE = 0x3Fu, /**< read/write */ |
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} at42qt1050_lld_register_t; |
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/**
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* @brief Firmware version register structure.
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*/
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typedef union { |
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uint8_t raw; |
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struct {
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uint8_t minor : 4;
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uint8_t major : 4;
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}; |
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} at42qt1050_lld_firmwarereg_t; |
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/**
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* @brief Relevant bits of the detection status register.
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*/
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typedef enum { |
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AT42QT1050_LLD_DETECTIONSTATUS_TOUCH = 0x01u, /**< Set if any keys are in detect. */ |
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AT42QT1050_LLD_DETECTIONSTATUS_OVERFLOW = 0x40u, /**< Set if the time to acquire all key signals exceeds 8ms. */ |
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AT42QT1050_LLD_DETECTIONSTATUS_CALIBRATE = 0x80u, /**< Set during calibration sequence. */ |
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} at42qt1050_lld_detectionstatusreg_t; |
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/**
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* @brief Key status register masks.
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*/
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typedef enum { |
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AT42QT1050_LLD_KEYSTATUS_KEY0 = 0x02u,
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AT42QT1050_LLD_KEYSTATUS_KEY1 = 0x04u,
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AT42QT1050_LLD_KEYSTATUS_KEY2 = 0x10u,
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AT42QT1050_LLD_KEYSTATUS_KEY3 = 0x20u,
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AT42QT1050_LLD_KEYSTATUS_KEY4 = 0x40u,
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} at42qt1050_lld_keystatusreg_t; |
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/**
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* @brief Pulse/Scale register structure.
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*/
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typedef union { |
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uint8_t raw; |
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struct {
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uint8_t scale : 4;
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uint8_t pulse : 4;
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}; |
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} at42qt1050_lld_pulsescalereg_t; |
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/**
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* @brief Detection Integrator (DI) / AKS register structure.
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*/
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typedef union { |
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uint8_t raw; |
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struct {
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uint8_t aks : 2;
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uint8_t detection_integrator : 6;
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}; |
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} at42qt1050_lld_detectionintegratoraksreg_t; |
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/**
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* @brief Charge share delay constant sclaing factor.
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* @details Values in the charge share delay registers are multiplied by this factor.
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* Unit is microseconds (µs).
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*/
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#define AT42QT1050_LLD_CHARGESHAREDELAY_FACTOR 2.5f |
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/**
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* @brief FastIn / FastOutDI / Max Cal / Guard Channel register masks.
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*/
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typedef enum { |
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AT42QT1050_LLD_FINFOUTMAXCALGUARD_GUARD = 0x0Fu,
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AT42QT1050_LLD_FINFOUTMAXCALGUARD_MAXCAL = 0x10u,
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AT42QT1050_LLD_FINFOUTMAXCALGUARD_FO = 0x20u,
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AT42QT1050_LLD_FINFOUTMAXCALGUARD_FI = 0x40u,
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} at42qt1050_lld_finfoutmaxcalguardreg_t; |
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/**
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* @brief Low power mode constant scaling factor.
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* @details The values in the low poer mode register is multiplied by this factor.
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* Unit is microseconds (µs).
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* @note Setting the power mode scaling register value to zero makes the AT42QT1050 enter deep-sleep mode.
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*/
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#define AT42QT1050_LLD_LOWPOWER_FACTOR 8000 |
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/**
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* @brief Man on duration constant scaling factor.
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* @details The value in the max on duration register is multiplied by this factor.
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* Unit is microseconds (µs).
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*/
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#define AT42QT1050_LLD_MAXONDURATION_FACTOR 160000 |
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/**
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* @brief RESET / Calibrate register masks.
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*/
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typedef enum { |
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AT42QT1050_LLD_RESETCALIBRATE_CALIBRATE = 0x7Fu,
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AT42QT1050_LLD_RESETCALIBRATE_RESET = 0x80u,
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} at42qt1050_lld_resetcalibratereg_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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apalExitStatus_t at42qt1050_lld_read_reg(const AT42QT1050Driver* at42qt1050d, const at42qt1050_lld_register_t reg, uint8_t* const data, const apalTime_t timeout); |
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apalExitStatus_t at42qt1050_lld_write_reg(const AT42QT1050Driver* at42qt1050d, const at42qt1050_lld_register_t reg, const uint8_t data, const apalTime_t timeout); |
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apalExitStatus_t at42qt1050_lld_read_keyssignal(const AT42QT1050Driver* at42qt1050d, const uint8_t key, uint16_t* signal, const apalTime_t timeout); |
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apalExitStatus_t at42qt1050_lld_read_referencedata(const AT42QT1050Driver* at42qt1050d, const uint8_t key, uint16_t* refdata, const apalTime_t timeout); |
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apalExitStatus_t at42qt1050_lld_reset_safe(const AT42QT1050Driver* at42qt1050d, const bool wait4wakeup, const apalTime_t timeout); |
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apalExitStatus_t at42qt1050_lld_reset(const AT42QT1050Driver* at42qt1050d, const apalTime_t timeout, const bool wait4wakeup); |
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uint16_t at42qt1050_lld_pulse2samples(const uint8_t pulse);
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float at42qt1050_lld_samples2pulse(const uint16_t samples); |
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uint16_t at42qt1050_lld_scale2scaling(const uint8_t scale);
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float at42qt1050_lld_scaling2scale(const uint16_t factor); |
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/**
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* @brief Calculates n-th address based on address of register 0.
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* @details Calculation: <scale value> = log2(<scaling factor>
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* )
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* @param[in] base Base address = frist register
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* @param[in] inc Jump to the next register inc times
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*
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* @return Calculated register address
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*/
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inline at42qt1050_lld_register_t at42qt1050_lld_addr_calc(const at42qt1050_lld_register_t base, const uint8_t inc) { |
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apalDbgAssert(inc < 5);
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uint8_t double_result = 0; //16bit access |
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switch (base) {
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case AT42QT1050_LLD_REG_KEYSIGNAL_0: //2 4 2 2 |
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case AT42QT1050_LLD_REG_REFERENCEDATA_0: //2 4 2 2 |
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double_result = 1;
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__attribute__((fallthrough)); |
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case AT42QT1050_LLD_REG_NEGATIVETHRESHOLD_0: //1 2 1 1 |
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case AT42QT1050_LLD_REG_PULSE_SCALE_0: //1 2 1 1 |
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case AT42QT1050_LLD_REG_INTEGRATOR_AKS_0: //1 2 1 1 |
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case AT42QT1050_LLD_REG_CHARGESHAREDELAY_0: //1 2 1 1 |
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{
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uint8_t increase = ((inc>1)?inc+1:inc); |
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return (at42qt1050_lld_register_t) (((uint8_t) base)+(increase << double_result));
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} |
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default:
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{
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apalDbgPrintf("invalid base register 0x%04X\n", base);
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return (at42qt1050_lld_register_t) 0xFF; //does not exist |
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} |
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} |
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} |
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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_AT42QT1050_H */ |
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/** @} */
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