amiro-lld / drivers / AT42QT1050 / v1 / alld_AT42QT1050.h @ 4dba9195
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| 1 | 9e45662e | Thomas Schöpping | /*
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| 2 | AMiRo-LLD is a compilation of low-level hardware drivers for the Autonomous Mini Robot (AMiRo) platform.
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| 3 | Copyright (C) 2016..2019 Thomas Schöpping et al.
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| 4 | |||
| 5 | This program is free software: you can redistribute it and/or modify
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| 6 | it under the terms of the GNU Lesser General Public License as published by
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| 7 | the Free Software Foundation, either version 3 of the License, or
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| 8 | (at your option) any later version.
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| 9 | |||
| 10 | This program is distributed in the hope that it will be useful,
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 13 | GNU Lesser General Public License for more details.
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| 14 | |||
| 15 | You should have received a copy of the GNU Lesser General Public License
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| 16 | along with this program. If not, see <http://www.gnu.org/licenses/>.
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| 17 | */
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| 18 | |||
| 19 | /**
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| 20 | 9466e34d | Thomas Schöpping | * @file alld_AT42QT1050.h
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| 21 | 9e45662e | Thomas Schöpping | * @brief Touch sensor macros and structures.
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| 22 | *
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| 23 | * @addtogroup lld_touch
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| 24 | * @{
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| 25 | */
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| 26 | |||
| 27 | 9466e34d | Thomas Schöpping | #ifndef AMIROLLD_AT42QT1050_H
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| 28 | #define AMIROLLD_AT42QT1050_H
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| 29 | 9e45662e | Thomas Schöpping | |
| 30 | #include <amiro-lld.h> |
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| 31 | |||
| 32 | ef078306 | Thomas Schöpping | /******************************************************************************/
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| 33 | /* CONSTANTS */
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| 34 | /******************************************************************************/
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| 35 | |||
| 36 | 9e45662e | Thomas Schöpping | /**
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| 37 | * @brief Maximum I2C frequency.
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| 38 | */
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| 39 | #define AT42QT1050_LLD_I2C_MAXFREQUENCY 400000 |
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| 40 | |||
| 41 | /**
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| 42 | * @brief A falling edge indicats an interrupt.
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| 43 | */
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| 44 | #define AT42QT1050_LLD_INT_EDGE APAL_GPIO_EDGE_FALLING
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| 45 | |||
| 46 | /**
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| 47 | * @brief Number of touch keys supported by AT42QT1050.
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| 48 | */
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| 49 | #define AT42QT1050_LLD_NUM_KEYS 5 |
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| 50 | |||
| 51 | /**
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| 52 | * @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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| 53 | */
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| 54 | #define AT42QT1050_LLD_MAX_KEY_ACQUIRATION_TIME 8000 |
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| 55 | |||
| 56 | /**
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| 57 | ef078306 | Thomas Schöpping | * @brief The chip ID as can be read from the according register (constant).
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| 58 | */
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| 59 | #define AT42QT1050_LLD_CHIPID 0x46 |
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| 60 | |||
| 61 | /******************************************************************************/
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| 62 | /* SETTINGS */
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| 63 | /******************************************************************************/
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| 64 | |||
| 65 | /******************************************************************************/
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| 66 | /* CHECKS */
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| 67 | /******************************************************************************/
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| 68 | |||
| 69 | /******************************************************************************/
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| 70 | /* DATA STRUCTURES AND TYPES */
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| 71 | /******************************************************************************/
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| 72 | |||
| 73 | /**
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| 74 | 9e45662e | Thomas Schöpping | * @brief The AT42QT1050Driver sruct.
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| 75 | */
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| 76 | typedef struct { |
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| 77 | apalI2CDriver_t* i2cd; |
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| 78 | apalI2Caddr_t addr; |
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| 79 | } AT42QT1050Driver; |
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| 80 | |||
| 81 | /**
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| 82 | * @brief Possible I2C address configurations.
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| 83 | */
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| 84 | enum {
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| 85 | AT42QT1050_LLD_I2C_ADDRSEL_LOW = 0x0041u, /**< ADDR_SEL pin is pulled low. */ |
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| 86 | AT42QT1050_LLD_I2C_ADDRSEL_HIGH = 0x0046u, /**< ADDR_SEL pin is pulled high. */ |
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| 87 | }; |
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| 88 | |||
| 89 | /**
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| 90 | 9466e34d | Thomas Schöpping | * @brief Available register addresses of the AT42QT1050.
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| 91 | 9e45662e | Thomas Schöpping | */
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| 92 | typedef enum { |
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| 93 | AT42QT1050_LLD_REG_CHIPID = 0x00u, /**< read only */ |
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| 94 | AT42QT1050_LLD_REG_FIRMWAREVERSION = 0x01u, /**< read only */ |
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| 95 | AT42QT1050_LLD_REG_DETECTIONSTATUS = 0x02u, /**< read only */ |
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| 96 | AT42QT1050_LLD_REG_KEYSTATUS = 0x03u, /**< read only */ |
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| 97 | AT42QT1050_LLD_REG_KEYSIGNAL_0 = 0x06u, /**< read only */ |
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| 98 | AT42QT1050_LLD_REG_KEYSIGNAL_1 = 0x08u, /**< read only */ |
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| 99 | AT42QT1050_LLD_REG_KEYSIGNAL_2 = 0x0Du, /**< read only */ |
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| 100 | AT42QT1050_LLD_REG_KEYSIGNAL_3 = 0x0Fu, /**< read only */ |
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| 101 | AT42QT1050_LLD_REG_KEYSIGNAL_4 = 0x11u, /**< read only */ |
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| 102 | AT42QT1050_LLD_REG_REFERENCEDATA_0 = 0x14u, /**< read only */ |
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| 103 | AT42QT1050_LLD_REG_REFERENCEDATA_1 = 0x16u, /**< read only */ |
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| 104 | AT42QT1050_LLD_REG_REFERENCEDATA_2 = 0x1Au, /**< read only */ |
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| 105 | AT42QT1050_LLD_REG_REFERENCEDATA_3 = 0x1Cu, /**< read only */ |
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| 106 | AT42QT1050_LLD_REG_REFERENCEDATA_4 = 0x1Eu, /**< read only */ |
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| 107 | AT42QT1050_LLD_REG_NEGATIVETHRESHOLD_0 = 0x21u, /**< read/write */ |
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| 108 | AT42QT1050_LLD_REG_NEGATIVETHRESHOLD_1 = 0x22u, /**< read/write */ |
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| 109 | AT42QT1050_LLD_REG_NEGATIVETHRESHOLD_2 = 0x24u, /**< read/write */ |
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| 110 | AT42QT1050_LLD_REG_NEGATIVETHRESHOLD_3 = 0x25u, /**< read/write */ |
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| 111 | AT42QT1050_LLD_REG_NEGATIVETHRESHOLD_4 = 0x26u, /**< read/write */ |
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| 112 | AT42QT1050_LLD_REG_PULSE_SCALE_0 = 0x28u, /**< read/write */ |
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| 113 | AT42QT1050_LLD_REG_PULSE_SCALE_1 = 0x29u, /**< read/write */ |
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| 114 | AT42QT1050_LLD_REG_PULSE_SCALE_2 = 0x2Bu, /**< read/write */ |
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| 115 | AT42QT1050_LLD_REG_PULSE_SCALE_3 = 0x2Cu, /**< read/write */ |
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| 116 | AT42QT1050_LLD_REG_PULSE_SCALE_4 = 0x2Du, /**< read/write */ |
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| 117 | AT42QT1050_LLD_REG_INTEGRATOR_AKS_0 = 0x2Fu, /**< read/write */ |
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| 118 | AT42QT1050_LLD_REG_INTEGRATOR_AKS_1 = 0x30u, /**< read/write */ |
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| 119 | AT42QT1050_LLD_REG_INTEGRATOR_AKS_2 = 0x32u, /**< read/write */ |
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| 120 | AT42QT1050_LLD_REG_INTEGRATOR_AKS_3 = 0x33u, /**< read/write */ |
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| 121 | AT42QT1050_LLD_REG_INTEGRATOR_AKS_4 = 0x34u, /**< read/write */ |
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| 122 | AT42QT1050_LLD_REG_CHARGESHAREDELAY_0 = 0x36u, /**< read/write */ |
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| 123 | AT42QT1050_LLD_REG_CHARGESHAREDELAY_1 = 0x37u, /**< read/write */ |
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| 124 | AT42QT1050_LLD_REG_CHARGESHAREDELAY_2 = 0x39u, /**< read/write */ |
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| 125 | AT42QT1050_LLD_REG_CHARGESHAREDELAY_3 = 0x3Au, /**< read/write */ |
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| 126 | AT42QT1050_LLD_REG_CHARGESHAREDELAY_4 = 0x3Bu, /**< read/write */ |
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| 127 | AT42QT1050_LLD_REG_FINFOUTMAXCALGUARD = 0x3Cu, /**< read/write */ |
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| 128 | AT42QT1050_LLD_REG_LOWPOWERMODE = 0x3Du, /**< read/write */ |
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| 129 | AT42QT1050_LLD_REG_MAXONDURATION = 0x3Eu, /**< read/write */ |
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| 130 | AT42QT1050_LLD_REG_RESET_CALIBRATE = 0x3Fu, /**< read/write */ |
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| 131 | } at42qt1050_lld_register_t; |
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| 132 | |||
| 133 | /**
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| 134 | * @brief Firmware version register structure.
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| 135 | */
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| 136 | typedef union { |
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| 137 | uint8_t raw; |
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| 138 | struct {
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| 139 | uint8_t minor : 4;
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| 140 | uint8_t major : 4;
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| 141 | }; |
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| 142 | } at42qt1050_lld_firmwarereg_t; |
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| 143 | |||
| 144 | |||
| 145 | /**
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| 146 | * @brief Relevant bits of the detection status register.
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| 147 | */
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| 148 | typedef enum { |
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| 149 | AT42QT1050_LLD_DETECTIONSTATUS_TOUCH = 0x01u, /**< Set if any keys are in detect. */ |
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| 150 | AT42QT1050_LLD_DETECTIONSTATUS_OVERFLOW = 0x40u, /**< Set if the time to acquire all key signals exceeds 8ms. */ |
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| 151 | AT42QT1050_LLD_DETECTIONSTATUS_CALIBRATE = 0x80u, /**< Set during calibration sequence. */ |
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| 152 | 9466e34d | Thomas Schöpping | } at42qt1050_lld_detectionstatusreg_t; |
| 153 | 9e45662e | Thomas Schöpping | |
| 154 | /**
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| 155 | * @brief Key status register masks.
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| 156 | */
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| 157 | typedef enum { |
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| 158 | AT42QT1050_LLD_KEYSTATUS_KEY0 = 0x02u,
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| 159 | AT42QT1050_LLD_KEYSTATUS_KEY1 = 0x04u,
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| 160 | AT42QT1050_LLD_KEYSTATUS_KEY2 = 0x10u,
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| 161 | AT42QT1050_LLD_KEYSTATUS_KEY3 = 0x20u,
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| 162 | AT42QT1050_LLD_KEYSTATUS_KEY4 = 0x40u,
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| 163 | } at42qt1050_lld_keystatusreg_t; |
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| 164 | |||
| 165 | /**
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| 166 | * @brief Pulse/Scale register structure.
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| 167 | */
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| 168 | typedef union { |
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| 169 | uint8_t raw; |
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| 170 | struct {
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| 171 | uint8_t scale : 4;
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| 172 | uint8_t pulse : 4;
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| 173 | }; |
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| 174 | } at42qt1050_lld_pulsescalereg_t; |
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| 175 | |||
| 176 | /**
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| 177 | * @brief Detection Integrator (DI) / AKS register structure.
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| 178 | */
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| 179 | typedef union { |
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| 180 | uint8_t raw; |
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| 181 | struct {
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| 182 | uint8_t aks : 2;
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| 183 | uint8_t detection_integrator : 6;
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| 184 | }; |
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| 185 | } at42qt1050_lld_detectionintegratoraksreg_t; |
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| 186 | |||
| 187 | /**
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| 188 | * @brief Charge share delay constant sclaing factor.
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| 189 | * @details Values in the charge share delay registers are multiplied by this factor.
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| 190 | * Unit is microseconds (µs).
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| 191 | */
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| 192 | #define AT42QT1050_LLD_CHARGESHAREDELAY_FACTOR 2.5f |
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| 193 | |||
| 194 | /**
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| 195 | * @brief FastIn / FastOutDI / Max Cal / Guard Channel register masks.
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| 196 | */
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| 197 | typedef enum { |
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| 198 | AT42QT1050_LLD_FINFOUTMAXCALGUARD_GUARD = 0x0Fu,
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| 199 | AT42QT1050_LLD_FINFOUTMAXCALGUARD_MAXCAL = 0x10u,
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| 200 | AT42QT1050_LLD_FINFOUTMAXCALGUARD_FO = 0x20u,
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| 201 | AT42QT1050_LLD_FINFOUTMAXCALGUARD_FI = 0x40u,
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| 202 | } at42qt1050_lld_finfoutmaxcalguardreg_t; |
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| 203 | |||
| 204 | /**
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| 205 | * @brief Low power mode constant scaling factor.
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| 206 | * @details The values in the low poer mode register is multiplied by this factor.
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| 207 | * Unit is microseconds (µs).
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| 208 | * @note Setting the power mode scaling register value to zero makes the AT42QT1050 enter deep-sleep mode.
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| 209 | */
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| 210 | #define AT42QT1050_LLD_LOWPOWER_FACTOR 8000 |
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| 211 | |||
| 212 | /**
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| 213 | * @brief Man on duration constant scaling factor.
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| 214 | * @details The value in the max on duration register is multiplied by this factor.
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| 215 | * Unit is microseconds (µs).
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| 216 | */
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| 217 | #define AT42QT1050_LLD_MAXONDURATION_FACTOR 160000 |
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| 218 | |||
| 219 | /**
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| 220 | * @brief RESET / Calibrate register masks.
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| 221 | */
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| 222 | typedef enum { |
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| 223 | AT42QT1050_LLD_RESETCALIBRATE_CALIBRATE = 0x7Fu,
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| 224 | AT42QT1050_LLD_RESETCALIBRATE_RESET = 0x80u,
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| 225 | } at42qt1050_lld_resetcalibratereg_t; |
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| 226 | |||
| 227 | ef078306 | Thomas Schöpping | /******************************************************************************/
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| 228 | /* MACROS */
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| 229 | /******************************************************************************/
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| 230 | |||
| 231 | /******************************************************************************/
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| 232 | /* EXTERN DECLARATIONS */
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| 233 | /******************************************************************************/
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| 234 | |||
| 235 | 9e45662e | Thomas Schöpping | #ifdef __cplusplus
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| 236 | extern "C" { |
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| 237 | #endif
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| 238 | 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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| 239 | 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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| 240 | |||
| 241 | apalExitStatus_t at42qt1050_lld_read_keyssignal(const AT42QT1050Driver* at42qt1050d, const uint8_t key, uint16_t* signal, const apalTime_t timeout); |
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| 242 | apalExitStatus_t at42qt1050_lld_read_referencedata(const AT42QT1050Driver* at42qt1050d, const uint8_t key, uint16_t* refdata, const apalTime_t timeout); |
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| 243 | |||
| 244 | 119ec0d2 | Felix Wittenfeld | apalExitStatus_t at42qt1050_lld_reset_safe(const AT42QT1050Driver* at42qt1050d, const bool wait4wakeup, const apalTime_t timeout); |
| 245 | apalExitStatus_t at42qt1050_lld_reset(const AT42QT1050Driver* at42qt1050d, const apalTime_t timeout, const bool wait4wakeup); |
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| 246 | |||
| 247 | 9e45662e | Thomas Schöpping | uint16_t at42qt1050_lld_pulse2samples(const uint8_t pulse);
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| 248 | float at42qt1050_lld_samples2pulse(const uint16_t samples); |
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| 249 | uint16_t at42qt1050_lld_scale2scaling(const uint8_t scale);
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| 250 | float at42qt1050_lld_scaling2scale(const uint16_t factor); |
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| 251 | 7df78c60 | Felix Wittenfeld | |
| 252 | |||
| 253 | /**
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| 254 | * @brief Calculates n-th address based on address of register 0.
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| 255 | * @details Calculation: <scale value> = log2(<scaling factor>
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| 256 | * )
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| 257 | * @param[in] base Base address = frist register
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| 258 | * @param[in] inc Jump to the next register inc times
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| 259 | *
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| 260 | * @return Calculated register address
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| 261 | */
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| 262 | inline at42qt1050_lld_register_t at42qt1050_lld_addr_calc(const at42qt1050_lld_register_t base, const uint8_t inc) { |
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| 263 | apalDbgAssert(inc < 5);
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| 264 | |||
| 265 | uint8_t double_result = 0; //16bit access |
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| 266 | |||
| 267 | switch (base) {
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| 268 | case AT42QT1050_LLD_REG_KEYSIGNAL_0: //2 4 2 2 |
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| 269 | case AT42QT1050_LLD_REG_REFERENCEDATA_0: //2 4 2 2 |
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| 270 | double_result = 1;
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| 271 | 9466e34d | Thomas Schöpping | __attribute__((fallthrough)); |
| 272 | 7df78c60 | Felix Wittenfeld | case AT42QT1050_LLD_REG_NEGATIVETHRESHOLD_0: //1 2 1 1 |
| 273 | case AT42QT1050_LLD_REG_PULSE_SCALE_0: //1 2 1 1 |
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| 274 | case AT42QT1050_LLD_REG_INTEGRATOR_AKS_0: //1 2 1 1 |
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| 275 | case AT42QT1050_LLD_REG_CHARGESHAREDELAY_0: //1 2 1 1 |
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| 276 | {
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| 277 | uint8_t increase = ((inc>1)?inc+1:inc); |
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| 278 | return (at42qt1050_lld_register_t) (((uint8_t) base)+(increase << double_result));
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| 279 | } |
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| 280 | default:
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| 281 | {
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| 282 | apalDbgPrintf("invalid base register 0x%04X\n", base);
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| 283 | return (at42qt1050_lld_register_t) 0xFF; //does not exist |
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| 284 | } |
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| 285 | } |
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| 286 | } |
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| 287 | |||
| 288 | 9e45662e | Thomas Schöpping | #ifdef __cplusplus
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| 289 | } |
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| 290 | #endif
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| 291 | |||
| 292 | ef078306 | Thomas Schöpping | /******************************************************************************/
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| 293 | /* INLINE FUNCTIONS */
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| 294 | /******************************************************************************/
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| 295 | |||
| 296 | 9466e34d | Thomas Schöpping | #endif /* AMIROLLD_AT42QT1050_H */ |
| 297 | 9e45662e | Thomas Schöpping | |
| 298 | /** @} */
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