| /* ---------------------------------------------------------------------------- | |
| * SAM Software Package License | |
| * ---------------------------------------------------------------------------- | |
| * Copyright (c) 2011, Atmel Corporation | |
| * | |
| * All rights reserved. | |
| * | |
| * Redistribution and use in source and binary forms, with or without | |
| * modification, are permitted provided that the following conditions are met: | |
| * | |
| * - Redistributions of source code must retain the above copyright notice, | |
| * this list of conditions and the disclaimer below. | |
| * | |
| * Atmel's name may not be used to endorse or promote products derived from | |
| * this software without specific prior written permission. | |
| * | |
| * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR | |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE | |
| * DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT, | |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, | |
| * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
| * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
| * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, | |
| * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| * ---------------------------------------------------------------------------- | |
| */ | |
| /** | |
| * \file | |
| * | |
| * Implementation QT1070 driver. | |
| * | |
| */ | |
| /*---------------------------------------------------------------------------- | |
| * Headers | |
| *----------------------------------------------------------------------------*/ | |
| #include "board.h" | |
| /*---------------------------------------------------------------------------- | |
| * Local functions | |
| *----------------------------------------------------------------------------*/ | |
| /** | |
| * \brief Read one byte of data from QT1070 Register. | |
| * | |
| * \param pTwid Pointer to twi driver structure. | |
| * \param regAddr Register address to read. | |
| * \return value in the given register. | |
| */ | |
| static uint8_t QT1070_ReadReg(Twid *pTwid, uint8_t regAddr) | |
| { | |
| uint8_t data; | |
| TWID_Write(pTwid, QT1070_SLAVE_ADDRESS, 0, 0, ®Addr, 1, 0); | |
| TWID_Read(pTwid, QT1070_SLAVE_ADDRESS, 0, 0, &data, 1, 0); | |
| return data; | |
| } | |
| /** | |
| * \brief Write one byte of data to QT1070 Register. | |
| * | |
| * \param pTwid Pointer to twi driver structure. | |
| * \param regAddr Register address to write. | |
| * \param data Data to write. | |
| */ | |
| static void QT1070_WriteReg(Twid *pTwid, uint32_t regAddr, uint8_t data) | |
| { | |
| TWID_Write(pTwid, QT1070_SLAVE_ADDRESS, regAddr, 1, &data, 1, 0); | |
| } | |
| /*---------------------------------------------------------------------------- | |
| * Exported functions | |
| *----------------------------------------------------------------------------*/ | |
| /** | |
| * \brief Get qt1070 chip ID. | |
| * | |
| * \param pTwid Pointer to twi driver structure. | |
| * \return Chip Id | |
| */ | |
| uint8_t QT1070_GetChipId(Twid *pTwid) | |
| { | |
| return QT1070_ReadReg( pTwid, QT1070_CHIP_ID); | |
| } | |
| /** | |
| * \brief Get qt1070 firmware version number. | |
| * | |
| * \param pTwid Pointer to twi driver structure. | |
| * \return Firmware version number. | |
| */ | |
| uint8_t QT1070_GetFirmwareVersion(Twid *pTwid) | |
| { | |
| return QT1070_ReadReg( pTwid, QT1070_REG_FIRMWARE_VERSION); | |
| } | |
| /** | |
| * \brief Get qt1070 detection status. | |
| * | |
| * \param pTwid Pointer to twi driver structure. | |
| * \return Dectection status. | |
| */ | |
| uint8_t QT1070_GetDetection_Status(Twid *pTwid) | |
| { | |
| return QT1070_ReadReg( pTwid, QT1070_REG_DETECTION_STATUS); | |
| } | |
| /** | |
| * \brief Get qt1070 Key status. | |
| * | |
| * \param pTwid Pointer to twi driver structure. | |
| * \return Key status. | |
| */ | |
| uint8_t QT1070_GetKey_Status(Twid *pTwid) | |
| { | |
| return QT1070_ReadReg( pTwid, QT1070_REG_KEY_STATUS); | |
| } | |
| /** | |
| * \brief Get qt1070 key signal value in the given Key. These are the key's | |
| * of 16-bit key signals which are accessed as two 8-bit bytes,stored MSB first | |
| * | |
| * \param pTwid Pointer to twi driver structure. | |
| * \param key Key index. | |
| * \return Key signal value. | |
| */ | |
| uint16_t QT1070_GetKey_Signal(Twid *pTwid, uint8_t key) | |
| { | |
| uint8_t data[2]; | |
| data[0] = QT1070_ReadReg( pTwid, QT1070_REG_KEY0_SIGNAL_MSB + key * 2); | |
| data[1] = QT1070_ReadReg( pTwid, QT1070_REG_KEY0_SIGNAL_LSB + key * 2); | |
| return (data[0] << 8) | data[1]; | |
| } | |
| /** | |
| * \brief Get qt1070 key reference data in the given Key. These are the key's | |
| * of 16-bit key reference data which are accessed as two 8-bit bytes, stored MSB first | |
| * | |
| * \param pTwid Pointer to twi driver structure. | |
| * \param key Key index. | |
| * \return Key reference data. | |
| */ | |
| uint16_t QT1070_GetKey_Reference(Twid *pTwid, uint8_t key) | |
| { | |
| uint8_t data[2]; | |
| data[0] = QT1070_ReadReg( pTwid, QT1070_REG_REFDATA0_MSB + key * 2); | |
| data[1] = QT1070_ReadReg( pTwid, QT1070_REG_REFDATA0_LSB + key * 2); | |
| return (data[0] << 8) | data[1]; | |
| } | |
| /** | |
| * \brief Set the threshold value for the given Key. | |
| * | |
| * \param pTwid Pointer to twi driver structure. | |
| * \param key Key index. | |
| * \param threshold Threshold value. | |
| */ | |
| void QT1070_SetThreshold(Twid *pTwid, uint8_t key, uint8_t threshold) | |
| { | |
| // Do not use a setting of 0 as this causes a key to go into detection | |
| // when its signal is equal to its reference. | |
| if ( threshold ) | |
| { | |
| QT1070_WriteReg(pTwid, QT1070_REG_NTHR_KEY0 + key, threshold); | |
| } | |
| } | |
| /** | |
| * \brief Set Averaging factor and adjacent key suppression for the given Key. | |
| * | |
| * \param pTwid Pointer to twi driver structure. | |
| * \param key Key index. | |
| * \param Ave Averaging factor. | |
| * \param Aks AKS group index. | |
| */ | |
| void QT1070_SetAveAks(Twid *pTwid, uint8_t key, uint8_t Ave, uint8_t Aks) | |
| { | |
| QT1070_WriteReg(pTwid, QT1070_REG_AVEAKS_KEY0 + key, (Ave << 3) | Aks ); | |
| } | |
| /** | |
| * \brief Set DI level for the given Key. This 8-bit value controls the number | |
| * of consecutive measurement that must be confirmed as having passed the key threshold | |
| * before that key is registered as being in detect. | |
| * | |
| * \param pTwid Pointer to twi driver structure. | |
| * \param key Key index. | |
| * \param di DI level. | |
| */ | |
| void QT1070_SetDetectionIntegrator(Twid *pTwid, uint8_t key, uint8_t di) | |
| { | |
| QT1070_WriteReg(pTwid, QT1070_REG_DI_KEY0 + key, di); | |
| } | |
| /** | |
| * \brief Start a calibration cycle, the CALIBTATE flag in the detection status | |
| * register is set when the calibration begins and clears when the calibration | |
| * has finished. | |
| * | |
| * \param pTwid Pointer to twi driver structure. | |
| */ | |
| void QT1070_StartCalibrate(Twid *pTwid) | |
| { | |
| QT1070_WriteReg(pTwid, QT1070_REG_CALIRATE , 1); | |
| } | |
| /** | |
| * \brief Reset the qt1070 device. | |
| * | |
| * \param pTwid Pointer to twi driver structure. | |
| */ | |
| void QT1070_StartReset(Twid *pTwid) | |
| { | |
| QT1070_WriteReg(pTwid, QT1070_REG_RESET , 1); | |
| } |