AMiRo-OS

/*

AMiRo-LLD is a compilation of low-level hardware drivers for the Autonomous Mini Robot (AMiRo) platform.

Copyright (C) 2016..2020  Thomas Schöpping et al.

This program is free software: you can redistribute it and/or modify

it under the terms of the GNU Lesser General Public License as published by

the Free Software Foundation, either version 3 of the License, or

(at your option) any later version.

This program is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License

along with this program.  If not, see <http://www.gnu.org/licenses/>.

*/

/**

 * @file    alld_MPR121.h

 * @brief   Touch Sensor macros and structures.

 *

 * @addtogroup lld_touch

 * @{

 */

#ifndef AMIROLLD_MPR121_H

#define AMIROLLD_MPR121_H

#include <amiro-lld.h>

/******************************************************************************/

/* CONSTANTS                                                                  */

/******************************************************************************/

/**

 * @brief Maximum I2C frequency.

 */

#define MPR121_LLD_I2C_MAXFREQUENCY   400000

/**

 * @brief A falling edge indicates an interrupt.

 */

#define MPR121_LLD_INT_EDGE           APAL_GPIO_EDGE_FALLING

/******************************************************************************/

/* SETTINGS                                                                   */

/******************************************************************************/

/******************************************************************************/

/* CHECKS                                                                     */

/******************************************************************************/

/******************************************************************************/

/* DATA STRUCTURES AND TYPES                                                  */

/******************************************************************************/

/**

 * @brief The MPR121 driver struct

 */

typedef struct {

  apalI2CDriver_t* i2cd;        /**< @brief The I2C Driver */

} MPR121Driver;

enum {

  MPR121_LLD_I2C_ADDR_FIXED   = 0x5Au,

  MPR121_LLD_I2C_ADDR_VSS     = 0x00u,

  MPR121_LLD_I2C_ADDR_VDD     = 0x01u,

  MPR121_LLD_I2C_ADDR_SDA     = 0x04u,

  MPR121_LLD_I2C_SOFTRESET    = 0x63,

};

/**

 * @brief Registers of the mpr121.

 */

typedef enum {

  MPR121_LLD_REGISTER_TOUCH_STATUS  = 0x00,

  MPR121_LLD_REGISTER_OOR_STATUS    = 0x02,

  MPR121_LLD_REGISTER_FILTERED_DATA = 0x04,

  MPR121_LLD_REGISTER_BASELINE      = 0x1E,

  MPR121_LLD_REGISTER_MHD_RISING    = 0x2B,

  MPR121_LLD_REGISTER_NHD_RISING    = 0x2C,

  MPR121_LLD_REGISTER_NCL_RISING    = 0x2D,

  MPR121_LLD_REGISTER_FDL_RISING    = 0x2E,

  MPR121_LLD_REGISTER_MHD_FALLING   = 0x2F,

  MPR121_LLD_REGISTER_NHD_FALLING   = 0x30,

  MPR121_LLD_REGISTER_NCL_FALLING   = 0x31,

  MPR121_LLD_REGISTER_FDL_FALLING   = 0x32,

  MPR121_LLD_REGISTER_NHD_TOUCHED   = 0x33,

  MPR121_LLD_REGISTER_NCL_TOUCHED   = 0x34,

  MPR121_LLD_REGISTER_FDL_TOUCHED   = 0x35,

  MPR121_LLD_REGISTER_ELEPROX_MHD_RISING    = 0x36,

  MPR121_LLD_REGISTER_ELEPROX_NHD_RISING    = 0x37,

  MPR121_LLD_REGISTER_ELEPROX_NCL_RISING    = 0x38,

  MPR121_LLD_REGISTER_ELEPROX_FDL_RISING    = 0x39,

  MPR121_LLD_REGISTER_ELEPROX_MHD_FALLING   = 0x3A,

  MPR121_LLD_REGISTER_ELEPROX_NHD_FALLING   = 0x3B,

  MPR121_LLD_REGISTER_ELEPROX_NCL_FALLING   = 0x3C,

  MPR121_LLD_REGISTER_ELEPROX_FDL_FALLING   = 0x3D,

  MPR121_LLD_REGISTER_ELEPROX_NHD_TOUCHED   = 0x3E,

  MPR121_LLD_REGISTER_ELEPROX_NCL_TOUCHED   = 0x3F,

  MPR121_LLD_REGISTER_ELEPROX_FDL_TOUCHED   = 0x40,

  MPR121_LLD_REGISTER_THRESHOLDS  = 0x41,

  MPR121_LLD_REGISTER_DEBOUNCE    = 0x5B,

  MPR121_LLD_REGISTER_CONFIG_1    = 0x5C,

  MPR121_LLD_REGISTER_CONFIG_2    = 0x5D,

  MPR121_LLD_REGISTER_CONFIG_ECR  = 0x5E,

  MPR121_LLD_REGISTER_ELE_CURRENT = 0x5F,

  MPR121_LLD_REGISTER_CHARGE_TIME = 0x6C,

  MPR121_LLD_REGISTER_GPIO_CTRL_0         = 0x73,

  MPR121_LLD_REGISTER_GPIO_CTRL_1         = 0x74,

  MPR121_LLD_REGISTER_GPIO_DATA           = 0x75,

  MPR121_LLD_REGISTER_GPIO_DIRECTION_CTRL = 0x76,

  MPR121_LLD_REGISTER_GPIO_ENABLE         = 0x77,

  MPR121_LLD_REGISTER_GPIO_DATA_SET       = 0x78,

  MPR121_LLD_REGISTER_GPIO_DATA_CLEAR     = 0x79,

  MPR121_LLD_REGISTER_GPIO_DATA_TOGGLE    = 0x7A,

  MPR121_LLD_REGISTER_AUTOCFG_CTRL_0       = 0x7B,

  MPR121_LLD_REGISTER_AUTOCFG_CTRL_1       = 0x7C,

  MPR121_LLD_REGISTER_AUTOCFG_USL          = 0x7D,

  MPR121_LLD_REGISTER_AUTOCFG_LSL          = 0x7E,

  MPR121_LLD_REGISTER_AUTOCFG_TARGET_LEVEL = 0x7F,

  MPR121_LLD_REGISTER_SOFT_RESET           = 0x80

} mpr121_lld_register_t;

/**

 * @brief Configuration data type.

 */

typedef union {

  uint8_t values[8];

  struct {

    uint8_t auto_config_1;

    uint8_t auto_config_2;

    uint8_t up_side_limit;

    uint8_t low_side_limit;

    uint8_t target_level;

    uint8_t config_1;

    uint8_t config_2;

    uint8_t ele_config;

  } registers;

} mpr121_lld_config_t;

/**

 * €brief Configutation register 1 masks.

 */

typedef enum {

  MPR121_LLD_FFI_6     = 0x00u,

  MPR121_LLD_FFI_10    = 0x40u,

  MPR121_LLD_FFI_18    = 0x80u,

  MPR121_LLD_FFI_34    = 0xC0u,

} mpr121_lld_config1_t;

/**

 * @brief Configuration register 2 masks.

 */

typedef enum {

  MPR121_LLD_CDT_OFF   = 0x00u,

  MPR121_LLD_CDT_0_5   = 0x20u,

  MPR121_LLD_CDT_1     = 0x40u,

  MPR121_LLD_CDT_2     = 0x60u,

  MPR121_LLD_CDT_4     = 0x80u,

  MPR121_LLD_CDT_8     = 0xA0u,

  MPR121_LLD_CDT_16    = 0xC0u,

  MPR121_LLD_CDT_32    = 0xE0u,

  MPR121_LLD_SFI_4     = 0x00u,

  MPR121_LLD_SFI_6     = 0x08u,

  MPR121_LLD_SFI_10    = 0x10u,

  MPR121_LLD_SFI_18    = 0x18u,

  MPR121_LLD_ESI_1     = 0x00u,

  MPR121_LLD_ESI_2     = 0x01u,

  MPR121_LLD_ESI_4     = 0x02u,

  MPR121_LLD_ESI_8     = 0x03u,

  MPR121_LLD_ESI_16    = 0x04u,

  MPR121_LLD_ESI_32    = 0x05u,

  MPR121_LLD_ESI_64    = 0x06u,

  MPR121_LLD_ESI_128   = 0x07u,

} mpr121_lld_config2_t;

/**

 * @brief Ele configuration register masks.

 */

typedef enum {

  MPR121_LLD_CL_ON_CURRENT  = 0x00u,

  MPR121_LLD_CL_OFF         = 0x40u,

  MPR121_LLD_CL_ON_HIGH5    = 0x80u,

  MPR121_LLD_CL_ON_ALL      = 0xC0u,

  MPR121_LLD_ELEPROX_0      = 0x00u,

  MPR121_LLD_ELEPROX_2      = 0x10u,

  MPR121_LLD_ELEPROX_4      = 0x20u,

  MPR121_LLD_ELEPROX_12     = 0x30u,

} mpr121_lld_ele_config_t;

/**

 * @brief Auto configuration register 0 masks.

 */

typedef enum {

  MPR121_LLD_AC_ENABLE      = 0x01u,

  MPR121_LLD_AC_RECONF_EN   = 0x02u,

  MPR121_LLD_BVA_ON_CURRENT = 0x00u,

  MPR121_LLD_BVA_OFF        = 0x04u,

  MPR121_LLD_BVA_ON_HIGH5   = 0x08u,

  MPR121_LLD_BVA_ON_ALL     = 0x0Cu,

  MPR121_LLD_RETRY_OFF      = 0x00u,

  MPR121_LLD_RETRY_2        = 0x10u,

  MPR121_LLD_RETRY_4        = 0x20u,

  MPR121_LLD_RETRY_8        = 0x30u,

  /* skip FFI */

} mpr121_lld_auto_config0_t;

/**

 * @brief Auto configuration register 1 masks.

 */

typedef enum {

  MPR121_LLD_AC_FAIL_INT_EN         = 0x01u,

  MPR121_LLD_AC_RECONF_FAIL_INT_EN  = 0x02u,

  MPR121_LLD_AC_OUT_OF_RANGE_INT_EN = 0x04u,

  MPR121_LLD_AC_SKIP_CHRG_TIME_SRCH = 0x80u,

} mpr121_lld_auto_config1_t;

/******************************************************************************/

/* MACROS                                                                     */

/******************************************************************************/

/******************************************************************************/

/* EXTERN DECLARATIONS                                                        */

/******************************************************************************/

#ifdef __cplusplus

extern "C" {

#endif

  apalExitStatus_t mpr121_lld_read_register(const MPR121Driver* const mprd, const mpr121_lld_register_t regaddr, const uint8_t offset, const uint8_t size, uint8_t* const data, const apalTime_t timeout);

  apalExitStatus_t mpr121_lld_write_register(const MPR121Driver* const mprd, const mpr121_lld_register_t regaddr, const uint8_t offset, const uint8_t size, const uint8_t* const data, const apalTime_t timeout);

  apalExitStatus_t mpr121_lld_soft_reset(const MPR121Driver* const mprd, const apalTime_t timeout);

  apalExitStatus_t mpr121_lld_read_filtered_data(const MPR121Driver* const mprd, const uint8_t index, const uint8_t num, uint16_t* const data, const apalTime_t timeout);

  apalExitStatus_t mpr121_lld_read_baseline_data(const MPR121Driver* const mprd, const uint8_t index, const uint8_t num, uint8_t* const data, const apalTime_t timeout);

  apalExitStatus_t mpr121_lld_read_electrode_data(const MPR121Driver* const mprd, const uint8_t index, const uint8_t num, uint8_t* const data, const apalTime_t timeout);

  apalExitStatus_t mpr121_lld_write_config(const MPR121Driver* const mprd, const mpr121_lld_config_t cfg, const apalTime_t timeout);

  apalExitStatus_t mpr121_lld_read_config(const MPR121Driver* const mprd, mpr121_lld_config_t* const cfg, const apalTime_t timeout);

#ifdef __cplusplus

}

#endif

/******************************************************************************/

/* INLINE FUNCTIONS                                                           */

/******************************************************************************/

#endif /* AMIROLLD_MPR121_H */

/** @} */