5e6d58dd03
Alan Carvalho de Assis has submitted the SGA and we can migrate the licenses to Apache. Gregory Nutt has submitted the SGA and we can migrate the licenses to Apache. Signed-off-by: Alin Jerpelea <alin.jerpelea@sony.com>
184 lines
4.9 KiB
C
184 lines
4.9 KiB
C
/****************************************************************************
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* drivers/sensors/adxl345_spi.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <unistd.h>
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#include <errno.h>
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#include <debug.h>
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#include <nuttx/kmalloc.h>
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#include <nuttx/spi/spi.h>
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#include <nuttx/sensors/adxl345.h>
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#include "adxl345.h"
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#if defined(CONFIG_SENSORS_ADXL345) && defined(CONFIG_ADXL345_SPI)
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: adxl345_configspi
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*
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* Description:
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*
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****************************************************************************/
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static inline void adxl345_configspi(FAR struct spi_dev_s *spi)
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{
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/* Configure SPI for the ADXL345 */
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SPI_SETMODE(spi, SPIDEV_MODE3);
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SPI_SETBITS(spi, 8);
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SPI_HWFEATURES(spi, 0);
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SPI_SETFREQUENCY(spi, ADXL345_SPI_MAXFREQUENCY);
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: adxl345_getreg8
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*
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* Description:
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* Read from an 8-bit ADXL345 register
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*
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****************************************************************************/
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uint8_t adxl345_getreg8(FAR struct adxl345_dev_s *priv, uint8_t regaddr)
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{
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uint8_t regval;
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/* If SPI bus is shared then lock and configure it */
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SPI_LOCK(priv->spi, true);
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adxl345_configspi(priv->spi);
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/* Select the ADXL345 */
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SPI_SELECT(priv->spi, SPIDEV_ACCELEROMETER(0), true);
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/* Send register to read and get the next byte */
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SPI_SEND(priv->spi, regaddr);
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SPI_RECVBLOCK(priv->spi, ®val, 1);
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/* Deselect the ADXL345 */
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SPI_SELECT(priv->spi, SPIDEV_ACCELEROMETER(0), false);
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/* Unlock bus */
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SPI_LOCK(priv->spi, false);
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#ifdef CONFIG_ADXL345_REGDEBUG
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_err("%02x->%02x\n", regaddr, regval);
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#endif
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return regval;
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}
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/****************************************************************************
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* Name: adxl345_putreg8
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*
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* Description:
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* Write a value to an 8-bit ADXL345 register
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*
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****************************************************************************/
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void adxl345_putreg8(FAR struct adxl345_dev_s *priv, uint8_t regaddr,
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uint8_t regval)
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{
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#ifdef CONFIG_ADXL345_REGDEBUG
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_err("%02x<-%02x\n", regaddr, regval);
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#endif
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/* If SPI bus is shared then lock and configure it */
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SPI_LOCK(priv->spi, true);
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adxl345_configspi(priv->spi);
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/* Select the ADXL345 */
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SPI_SELECT(priv->spi, SPIDEV_ACCELEROMETER(0), true);
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/* Send register address and set the value */
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SPI_SEND(priv->spi, regaddr);
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SPI_SEND(priv->spi, regval);
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/* Deselect the ADXL345 */
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SPI_SELECT(priv->spi, SPIDEV_ACCELEROMETER(0), false);
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/* Unlock bus */
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SPI_LOCK(priv->spi, false);
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}
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/****************************************************************************
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* Name: adxl345_getreg16
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*
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* Description:
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* Read 16-bits of data from an ADXL345 register
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*
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****************************************************************************/
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uint16_t adxl345_getreg16(FAR struct adxl345_dev_s *priv, uint8_t regaddr)
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{
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uint16_t regval;
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/* If SPI bus is shared then lock and configure it */
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SPI_LOCK(priv->spi, true);
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adxl345_configspi(priv->spi);
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/* Select the ADXL345 */
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SPI_SELECT(priv->spi, SPIDEV_ACCELEROMETER(0), true);
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/* Send register to read and get the next 2 bytes */
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SPI_SEND(priv->spi, regaddr);
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SPI_RECVBLOCK(priv->spi, ®val, 2);
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/* Deselect the ADXL345 */
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SPI_SELECT(priv->spi, SPIDEV_ACCELEROMETER(0), false);
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/* Unlock bus */
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SPI_LOCK(priv->spi, false);
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#ifdef CONFIG_ADXL345_REGDEBUG
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_err("%02x->%04x\n", regaddr, regval);
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#endif
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return regval;
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}
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#endif /* CONFIG_SENSORS_ADXL345 && CONFIG_ADXL345_SPI*/
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