b49be4bb20
arch/: Removed all references to CONFIG_DISABLE_POLL. The standard POSIX poll() can not longer be disabled.
sched/ audio/ crypto/: Removed all references to CONFIG_DISABLE_POLL. The standard POSIX poll() can not longer be disabled.
Documentation/: Removed all references to CONFIG_DISABLE_POLL. The standard POSIX poll() can not longer be disabled.
fs/: Removed all references to CONFIG_DISABLE_POLL. The standard POSIX poll() can not longer be disabled.
graphics/: Removed all references to CONFIG_DISABLE_POLL. The standard POSIX poll() can not longer be disabled.
net/: Removed all references to CONFIG_DISABLE_POLL. The standard POSIX poll() can not longer be disabled.
drivers/: Removed all references to CONFIG_DISABLE_POLL. The standard POSIX poll() can not longer be disabled.
include/, syscall/, wireless/: Removed all references to CONFIG_DISABLE_POLL. The standard POSIX poll() can not longer be disabled.
configs/: Remove all references to CONFIG_DISABLE_POLL. Standard POSIX poll can no longer be disabled.
1129 lines
31 KiB
C
1129 lines
31 KiB
C
/****************************************************************************
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* drivers/sensors/sps30.c
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* Driver for the Sensirion SPS30 particulate matter sensor
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*
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* Copyright (C) 2019 Haltian Ltd. All rights reserved.
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* Author: Jussi Kivilinna <jussi.kivilinna@haltian.com>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
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* POSSIBILITY OF SUCH DAMAGE.
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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 <stdint.h>
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#include <stdio.h>
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#include <string.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <time.h>
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#include <debug.h>
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#include <nuttx/kmalloc.h>
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#include <nuttx/signal.h>
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#include <nuttx/fs/fs.h>
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#include <nuttx/i2c/i2c_master.h>
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#include <nuttx/sensors/sps30.h>
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#include <nuttx/random.h>
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#if defined(CONFIG_SENSORS_SPS30)
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#ifdef CONFIG_SPS30_DEBUG
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# define sps30_dbg(x, ...) _info(x, ##__VA_ARGS__)
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#else
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# define sps30_dbg(x, ...) sninfo(x, ##__VA_ARGS__)
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#endif
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#ifndef CONFIG_SPS30_I2C_FREQUENCY
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# define CONFIG_SPS30_I2C_FREQUENCY 100000
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#endif
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#define SPS30_MEASUREMENT_INTERVAL 1 /* one second, fixed in hw */
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#define SPS30_MEASUREMENT_MODE 0x0300
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#define SPS30_I2C_RETRIES 3
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/* SPS30 command words */
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#define SPS30_CMD_START_MEASUREMENT 0x0010
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#define SPS30_CMD_STOP_MEASUREMENT 0x0104
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#define SPS30_CMD_GET_DATA_READY 0x0202
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#define SPS30_CMD_READ_MEASUREMENT 0x0300
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#define SPS30_CMD_SET_AUTO_CLEANING_INTERVAL 0x8004
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#define SPS30_CMD_START_FAN_CLEANING 0x5607
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#define SPS30_CMD_READ_ARTICLE_CODE 0xD025
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#define SPS30_CMD_READ_SERIAL_NUMBER 0xD033
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#define SPS30_CMD_SOFT_RESET 0xD304
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/****************************************************************************
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* Private
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****************************************************************************/
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struct sps30_dev_s
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{
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#ifdef CONFIG_SPS30_I2C
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FAR struct i2c_master_s *i2c; /* I2C interface */
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uint8_t addr; /* I2C address */
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#endif
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bool valid; /* If cached readings are valid */
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bool started; /* If continuous measurement is enabled */
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#ifndef CONFIG_DISABLE_PSEUDOFS_OPERATIONS
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bool unlinked; /* True, driver has been unlinked */
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#endif
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struct timespec last_update; /* Last time when sensor was read */
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#ifndef CONFIG_DISABLE_PSEUDOFS_OPERATIONS
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int16_t crefs; /* Number of open references */
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#endif
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sem_t devsem;
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/* Cached sensor values */
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struct sps30_conv_data_s data;
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};
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struct sps30_word_s
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{
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uint8_t data[2];
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uint8_t crc;
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};
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/****************************************************************************
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* Private Function Prototypes
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****************************************************************************/
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/* IO Helpers */
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#ifdef CONFIG_SPS30_I2C
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static int sps30_do_transfer(FAR struct i2c_master_s *i2c,
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FAR struct i2c_msg_s *msgv,
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size_t nmsg);
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#endif
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static int sps30_write_cmd(FAR struct sps30_dev_s *priv, uint16_t cmd,
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FAR struct sps30_word_s *params,
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unsigned int num_params);
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static int sps30_read_cmd(FAR struct sps30_dev_s *priv, uint16_t cmd,
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FAR struct sps30_word_s *words,
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unsigned int num_words);
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/* Data conversion */
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static uint8_t sps30_crc_word(uint16_t word);
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static void sps30_set_command_param(FAR struct sps30_word_s *param,
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uint16_t value);
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static int sps30_check_data_crc(FAR const struct sps30_word_s *words,
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unsigned int num_words);
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static uint16_t sps30_data_word_to_uint16(FAR const struct sps30_word_s *word);
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static float sps30_data_words_to_float(FAR const struct sps30_word_s words[2]);
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/* Driver features */
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static int sps30_read_values(FAR struct sps30_dev_s *priv,
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FAR struct sps30_conv_data_s *out, bool wait);
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static int sps30_configure(FAR struct sps30_dev_s *priv, bool start);
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static int sps30_read_dev_info(FAR struct sps30_dev_s *priv, uint16_t cmd,
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char *out, size_t outlen);
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/* Character driver methods */
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#ifndef CONFIG_DISABLE_PSEUDOFS_OPERATIONS
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static int sps30_open(FAR struct file *filep);
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static int sps30_close(FAR struct file *filep);
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#endif
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static ssize_t sps30_read(FAR struct file *filep, FAR char *buffer,
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size_t buflen);
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static ssize_t sps30_write(FAR struct file *filep, FAR const char *buffer,
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size_t buflen);
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static int sps30_ioctl(FAR struct file *filep, int cmd,
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unsigned long arg);
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#ifndef CONFIG_DISABLE_PSEUDOFS_OPERATIONS
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static int sps30_unlink(FAR struct inode *inode);
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#endif
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/****************************************************************************
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* Private Data
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****************************************************************************/
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static const struct file_operations g_sps30fops =
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{
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#ifndef CONFIG_DISABLE_PSEUDOFS_OPERATIONS
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sps30_open, /* open */
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sps30_close, /* close */
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#else
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NULL, /* open */
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NULL, /* close */
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#endif
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sps30_read, /* read */
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sps30_write, /* write */
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NULL, /* seek */
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sps30_ioctl, /* ioctl */
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NULL /* poll */
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#ifndef CONFIG_DISABLE_PSEUDOFS_OPERATIONS
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, sps30_unlink /* unlink */
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#endif
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};
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: sps30_do_transfer
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****************************************************************************/
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#ifdef CONFIG_SPS30_I2C
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static int sps30_do_transfer(FAR struct i2c_master_s *i2c,
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FAR struct i2c_msg_s *msgv,
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size_t nmsg)
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{
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int ret = -EIO;
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int retries;
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for (retries = 0; retries < SPS30_I2C_RETRIES; retries++)
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{
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ret = I2C_TRANSFER(i2c, msgv, nmsg);
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if (ret >= 0)
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{
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return 0;
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}
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else
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{
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/* Some error. Try to reset I2C bus and keep trying. */
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#ifdef CONFIG_I2C_RESET
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if (retries == SPS30_I2C_RETRIES - 1)
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{
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break;
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}
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ret = I2C_RESET(i2c);
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if (ret < 0)
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{
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sps30_dbg("I2C_RESET failed: %d\n", ret);
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return ret;
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}
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#endif
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}
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}
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sps30_dbg("xfer failed: %d\n", ret);
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return ret;
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}
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#endif
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/****************************************************************************
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* Name: sps30_write_cmd
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****************************************************************************/
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static int sps30_write_cmd(FAR struct sps30_dev_s *priv, uint16_t cmd,
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FAR struct sps30_word_s *params,
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unsigned int num_params)
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{
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#ifdef CONFIG_SPS30_I2C
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struct i2c_msg_s msg[2];
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uint8_t cmd_buf[2];
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int ret;
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cmd_buf[0] = cmd >> 8;
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cmd_buf[1] = cmd >> 0;
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msg[0].frequency = CONFIG_SPS30_I2C_FREQUENCY;
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msg[0].addr = priv->addr;
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msg[0].flags = 0;
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msg[0].buffer = cmd_buf;
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msg[0].length = 2;
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if (num_params)
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{
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msg[1].frequency = CONFIG_SPS30_I2C_FREQUENCY;
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msg[1].addr = priv->addr;
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msg[1].flags = I2C_M_NOSTART;
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msg[1].buffer = (FAR uint8_t *)params;
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msg[1].length = num_params * sizeof(*params);
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}
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ret = sps30_do_transfer(priv->i2c, msg, (num_params) ? 2 : 1);
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sps30_dbg("cmd: 0x%04X num_params: %d ret: %d\n",
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cmd, num_params, ret);
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return (ret >= 0) ? OK : ret;
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#else
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/* UART mode not implemented yet. */
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return -ENODEV;
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#endif
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}
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/****************************************************************************
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* Name: sps30_read_words
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****************************************************************************/
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static int sps30_read_cmd(FAR struct sps30_dev_s *priv, uint16_t cmd,
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FAR struct sps30_word_s *words,
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unsigned int num_words)
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{
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#ifdef CONFIG_SPS30_I2C
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struct i2c_msg_s msg[1];
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uint8_t addr_buf[2];
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int ret;
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addr_buf[0] = cmd >> 8;
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addr_buf[1] = cmd >> 0;
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msg[0].frequency = CONFIG_SPS30_I2C_FREQUENCY;
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msg[0].addr = priv->addr;
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msg[0].flags = 0;
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msg[0].buffer = addr_buf;
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msg[0].length = 2;
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ret = sps30_do_transfer(priv->i2c, msg, 1);
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sps30_dbg("cmd: 0x%04X ret: %d\n", cmd, ret);
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if (ret < 0)
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{
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return ret;
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}
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msg[0].frequency = CONFIG_SPS30_I2C_FREQUENCY;
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msg[0].addr = priv->addr;
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msg[0].flags = I2C_M_READ;
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msg[0].buffer = (FAR uint8_t *)words;
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msg[0].length = num_words * sizeof(*words);
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ret = sps30_do_transfer(priv->i2c, msg, 1);
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sps30_dbg("read cmd: 0x%04X num_params: %d ret: %d\n",
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cmd, num_words, ret);
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return (ret >= 0) ? OK : ret;
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#else
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/* UART mode not implemented yet. */
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return -ENODEV;
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#endif
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}
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/****************************************************************************
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* Name: sps30_crc_word
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****************************************************************************/
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static uint8_t sps30_crc_word(uint16_t word)
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{
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static const uint8_t crc_table[16] =
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{
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0x00, 0x31, 0x62, 0x53, 0xc4, 0xf5, 0xa6, 0x97,
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0xb9, 0x88, 0xdb, 0xea, 0x7d, 0x4c, 0x1f, 0x2e
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};
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uint8_t crc = 0xFF;
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crc ^= word >> 8;
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crc = (crc << 4) ^ crc_table[crc >> 4];
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crc = (crc << 4) ^ crc_table[crc >> 4];
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crc ^= word >> 0;
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crc = (crc << 4) ^ crc_table[crc >> 4];
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crc = (crc << 4) ^ crc_table[crc >> 4];
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return crc;
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}
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|
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/****************************************************************************
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* Name: sps30_set_command_param
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|
****************************************************************************/
|
|
|
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static void sps30_set_command_param(FAR struct sps30_word_s *param,
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uint16_t value)
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{
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param->data[0] = value >> 8;
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param->data[1] = value >> 0;
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param->crc = sps30_crc_word(value);
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}
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|
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/****************************************************************************
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* Name: sps30_data_words_to_float
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****************************************************************************/
|
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static float sps30_data_words_to_float(FAR const struct sps30_word_s words[2])
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{
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uint8_t data[4];
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float value;
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data[3] = words[0].data[0];
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data[2] = words[0].data[1];
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data[1] = words[1].data[0];
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data[0] = words[1].data[1];
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memcpy(&value, data, 4);
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return value;
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}
|
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|
|
/****************************************************************************
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|
* Name: sps30_data_word_to_uint16
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|
****************************************************************************/
|
|
|
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static uint16_t sps30_data_word_to_uint16(FAR const struct sps30_word_s *word)
|
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{
|
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return (word[0].data[0] << 8) | (word[0].data[1]);
|
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}
|
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|
|
/****************************************************************************
|
|
* Name: sps30_crc_word
|
|
****************************************************************************/
|
|
|
|
static int sps30_check_data_crc(FAR const struct sps30_word_s *words,
|
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unsigned int num_words)
|
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{
|
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while (num_words)
|
|
{
|
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if (sps30_crc_word(sps30_data_word_to_uint16(words)) != words->crc)
|
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{
|
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return -1;
|
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}
|
|
|
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num_words--;
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words++;
|
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}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: sps30_softreset
|
|
*
|
|
* Description:
|
|
* Reset the SPS30 sensor. This takes less than 2000 ms.
|
|
*
|
|
****************************************************************************/
|
|
|
|
static int sps30_softreset(FAR struct sps30_dev_s *priv)
|
|
{
|
|
int ret;
|
|
|
|
ret = sps30_write_cmd(priv, SPS30_CMD_SOFT_RESET, NULL, 0);
|
|
if (ret < 0)
|
|
{
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: has_time_passed
|
|
*
|
|
* Description:
|
|
* Return true if curr >= start + secs_since_start
|
|
*
|
|
****************************************************************************/
|
|
|
|
static bool has_time_passed(struct timespec curr,
|
|
struct timespec start,
|
|
unsigned int secs_since_start)
|
|
{
|
|
if ((long)((start.tv_sec + secs_since_start) - curr.tv_sec) == 0)
|
|
{
|
|
return start.tv_nsec <= curr.tv_nsec;
|
|
}
|
|
|
|
return (long)((start.tv_sec + secs_since_start) - curr.tv_sec) <= 0;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: sps30_read_values
|
|
****************************************************************************/
|
|
|
|
static int sps30_read_values(FAR struct sps30_dev_s *priv,
|
|
FAR struct sps30_conv_data_s *out, bool wait)
|
|
{
|
|
struct sps30_word_s data[20];
|
|
struct timespec ts;
|
|
int ret;
|
|
|
|
clock_gettime(CLOCK_REALTIME, &ts);
|
|
|
|
if (wait || !priv->valid ||
|
|
has_time_passed(ts, priv->last_update, SPS30_MEASUREMENT_INTERVAL))
|
|
{
|
|
while (1)
|
|
{
|
|
/* Wait data to be ready. */
|
|
|
|
ret = sps30_read_cmd(priv, SPS30_CMD_GET_DATA_READY, data, 1);
|
|
if (ret < 0)
|
|
{
|
|
sps30_dbg("ERROR: sps30_read_cmd failed: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
if (sps30_check_data_crc(data, 1) < 0)
|
|
{
|
|
sps30_dbg("ERROR: sps30_read_words crc failed\n");
|
|
ret = -EIO;
|
|
return ret;
|
|
}
|
|
|
|
if (sps30_data_word_to_uint16(data) != 0x0001)
|
|
{
|
|
if (!wait)
|
|
{
|
|
sps30_dbg("ERROR: data not ready\n");
|
|
ret = -EAGAIN;
|
|
return ret;
|
|
}
|
|
|
|
ret = nxsig_usleep(500 * 1000);
|
|
if (ret == -EINTR)
|
|
{
|
|
return ret;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Read the raw data */
|
|
|
|
ret = sps30_read_cmd(priv, SPS30_CMD_READ_MEASUREMENT, data, 20);
|
|
if (ret < 0)
|
|
{
|
|
sps30_dbg("ERROR: sps30_read_cmd failed: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
if (sps30_check_data_crc(data, 20) < 0)
|
|
{
|
|
sps30_dbg("ERROR: sps30_read_words crc failed\n");
|
|
ret = -EIO;
|
|
return ret;
|
|
}
|
|
|
|
add_sensor_randomness(((data[0].crc ^ data[1].crc) << 0) ^
|
|
((data[2].crc ^ data[3].crc) << 8) ^
|
|
((data[4].crc ^ data[5].crc) << 16) ^
|
|
((data[6].crc ^ data[7].crc) << 24) ^
|
|
((data[8].crc ^ data[9].crc) << 0) ^
|
|
((data[10].crc ^ data[11].crc) << 8) ^
|
|
((data[12].crc ^ data[13].crc) << 16) ^
|
|
((data[14].crc ^ data[15].crc) << 24) ^
|
|
((data[16].crc ^ data[17].crc) << 0) ^
|
|
((data[18].crc ^ data[19].crc) << 8));
|
|
|
|
priv->data.mass_concenration_pm1_0 =
|
|
sps30_data_words_to_float(data + 0);
|
|
priv->data.mass_concenration_pm2_5 =
|
|
sps30_data_words_to_float(data + 2);
|
|
priv->data.mass_concenration_pm4_0 =
|
|
sps30_data_words_to_float(data + 4);
|
|
priv->data.mass_concenration_pm10 =
|
|
sps30_data_words_to_float(data + 6);
|
|
priv->data.number_concenration_pm0_5 =
|
|
sps30_data_words_to_float(data + 8);
|
|
priv->data.number_concenration_pm1_0 =
|
|
sps30_data_words_to_float(data + 10);
|
|
priv->data.number_concenration_pm2_5 =
|
|
sps30_data_words_to_float(data + 12);
|
|
priv->data.number_concenration_pm4_0 =
|
|
sps30_data_words_to_float(data + 14);
|
|
priv->data.number_concenration_pm10 =
|
|
sps30_data_words_to_float(data + 16);
|
|
priv->data.typical_particle_size =
|
|
sps30_data_words_to_float(data + 18);
|
|
priv->last_update = ts;
|
|
priv->valid = true;
|
|
|
|
/* Wait data to be ready. */
|
|
|
|
ret = sps30_read_cmd(priv, SPS30_CMD_GET_DATA_READY, data, 1);
|
|
if (ret < 0)
|
|
{
|
|
sps30_dbg("ERROR: sps30_read_cmd failed: %d\n", ret);
|
|
}
|
|
}
|
|
|
|
*out = priv->data;
|
|
return OK;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: sps30_read_dev_info
|
|
****************************************************************************/
|
|
|
|
static int sps30_read_dev_info(FAR struct sps30_dev_s *priv, uint16_t cmd,
|
|
char *out, size_t outlen)
|
|
{
|
|
struct sps30_word_s buf[16];
|
|
int ret;
|
|
|
|
ret = sps30_read_cmd(priv, cmd, buf, 16);
|
|
if (ret < 0)
|
|
{
|
|
sps30_dbg("ERROR: sps30_read_cmd failed: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
if (sps30_check_data_crc(buf, 16) < 0)
|
|
{
|
|
sps30_dbg("ERROR: sps30_read_words crc failed\n");
|
|
ret = -EIO;
|
|
return ret;
|
|
}
|
|
|
|
ret = 0;
|
|
while (outlen && ret < 32)
|
|
{
|
|
*out = buf[ret / 2].data[ret % 2];
|
|
ret++;
|
|
out++;
|
|
outlen--;
|
|
}
|
|
|
|
if (outlen)
|
|
{
|
|
*out = '\0';
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: sps30_configure
|
|
****************************************************************************/
|
|
|
|
static int sps30_configure(FAR struct sps30_dev_s *priv, bool start)
|
|
{
|
|
struct sps30_word_s param;
|
|
int ret;
|
|
|
|
if (!start)
|
|
{
|
|
/* Stop measurements. */
|
|
|
|
ret = sps30_write_cmd(priv, SPS30_CMD_STOP_MEASUREMENT, ¶m, 1);
|
|
if (ret >= 0)
|
|
{
|
|
priv->started = false;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* Start measurements (and set pressure compensation). */
|
|
|
|
sps30_set_command_param(¶m, SPS30_MEASUREMENT_MODE);
|
|
ret = sps30_write_cmd(priv, SPS30_CMD_START_MEASUREMENT, ¶m, 1);
|
|
if (ret >= 0)
|
|
{
|
|
priv->started = true;
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: sps30_open
|
|
*
|
|
* Description:
|
|
* This function is called whenever the SPS30x device is opened.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifndef CONFIG_DISABLE_PSEUDOFS_OPERATIONS
|
|
static int sps30_open(FAR struct file *filep)
|
|
{
|
|
FAR struct inode *inode = filep->f_inode;
|
|
FAR struct sps30_dev_s *priv = inode->i_private;
|
|
union
|
|
{
|
|
uint32_t u32[8];
|
|
char c[32];
|
|
} code, sn;
|
|
int ret;
|
|
|
|
/* Get exclusive access */
|
|
|
|
do
|
|
{
|
|
ret = nxsem_wait(&priv->devsem);
|
|
|
|
/* The only case that an error should occur here is if the wait was
|
|
* awakened by a signal.
|
|
*/
|
|
|
|
DEBUGASSERT(ret == OK || ret == -EINTR);
|
|
}
|
|
while (ret == -EINTR);
|
|
|
|
/* Increment the count of open references on the driver */
|
|
|
|
priv->crefs++;
|
|
DEBUGASSERT(priv->crefs > 0);
|
|
|
|
if (priv->crefs == 1)
|
|
{
|
|
/* Read device information. */
|
|
|
|
ret = sps30_read_dev_info(priv, SPS30_CMD_READ_ARTICLE_CODE, code.c,
|
|
sizeof(code.c));
|
|
if (ret >= 0)
|
|
{
|
|
ret = sps30_read_dev_info(priv, SPS30_CMD_READ_SERIAL_NUMBER, sn.c,
|
|
sizeof(sn.c));
|
|
if (ret >= 0)
|
|
{
|
|
static int once;
|
|
|
|
if (!once)
|
|
{
|
|
once = 1;
|
|
up_rngaddentropy(RND_SRC_SENSOR, code.u32,
|
|
(strlen(code.c) + 3) / 4);
|
|
up_rngaddentropy(RND_SRC_SENSOR, sn.u32,
|
|
(strlen(sn.c) + 3) / 4);
|
|
}
|
|
|
|
sps30_dbg("article code: \"%.*s\"\n", 32, code.c);
|
|
sps30_dbg("serial number: \"%.*s\"\n", 32, sn.c);
|
|
|
|
/* Start sensor. */
|
|
|
|
ret = sps30_configure(priv, true);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (ret < 0)
|
|
{
|
|
priv->crefs--;
|
|
}
|
|
|
|
nxsem_post(&priv->devsem);
|
|
return ret;
|
|
}
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Name: sps30_close
|
|
*
|
|
* Description:
|
|
* This routine is called when the SPS30 device is closed.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifndef CONFIG_DISABLE_PSEUDOFS_OPERATIONS
|
|
static int sps30_close(FAR struct file *filep)
|
|
{
|
|
FAR struct inode *inode = filep->f_inode;
|
|
FAR struct sps30_dev_s *priv = inode->i_private;
|
|
int ret;
|
|
|
|
/* Get exclusive access */
|
|
|
|
do
|
|
{
|
|
ret = nxsem_wait(&priv->devsem);
|
|
|
|
/* The only case that an error should occur here is if the wait was
|
|
* awakened by a signal.
|
|
*/
|
|
|
|
DEBUGASSERT(ret == OK || ret == -EINTR);
|
|
}
|
|
while (ret == -EINTR);
|
|
|
|
/* Decrement the count of open references on the driver */
|
|
|
|
DEBUGASSERT(priv->crefs > 0);
|
|
priv->crefs--;
|
|
|
|
/* If the count has decremented to zero and the driver has been unlinked,
|
|
* then free memory now.
|
|
*/
|
|
|
|
if (priv->crefs <= 0 && priv->unlinked)
|
|
{
|
|
nxsem_destroy(&priv->devsem);
|
|
kmm_free(priv);
|
|
return OK;
|
|
}
|
|
|
|
nxsem_post(&priv->devsem);
|
|
return OK;
|
|
}
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Name: sps30_read
|
|
****************************************************************************/
|
|
|
|
static ssize_t sps30_read(FAR struct file *filep, FAR char *buffer,
|
|
size_t buflen)
|
|
{
|
|
FAR struct inode *inode = filep->f_inode;
|
|
FAR struct sps30_dev_s *priv = inode->i_private;
|
|
ssize_t length = 0;
|
|
struct sps30_conv_data_s data;
|
|
unsigned int data100[10];
|
|
int ret;
|
|
|
|
/* Get exclusive access */
|
|
|
|
do
|
|
{
|
|
ret = nxsem_wait(&priv->devsem);
|
|
|
|
/* The only case that an error should occur here is if the wait was
|
|
* awakened by a signal.
|
|
*/
|
|
|
|
DEBUGASSERT(ret == OK || ret == -EINTR);
|
|
}
|
|
while (ret == -EINTR);
|
|
|
|
#ifndef CONFIG_DISABLE_PSEUDOFS_OPERATIONS
|
|
if (priv->unlinked)
|
|
{
|
|
/* Do not allow operations on unlinked sensors. This allows
|
|
* sensor use on hot swappable I2C bus.
|
|
*/
|
|
|
|
nxsem_post(&priv->devsem);
|
|
return -ENODEV;
|
|
}
|
|
#endif
|
|
|
|
if (!priv->started)
|
|
{
|
|
return -ENODATA;
|
|
}
|
|
|
|
ret = sps30_read_values(priv, &data, !(filep->f_oflags & O_NONBLOCK));
|
|
if (ret < 0)
|
|
{
|
|
sps30_dbg("cannot read data: %d\n", ret);
|
|
}
|
|
else
|
|
{
|
|
/* This interface is mainly intended for easy debugging in nsh. */
|
|
|
|
data100[0] = abs(data.mass_concenration_pm1_0 * 100);
|
|
data100[1] = abs(data.mass_concenration_pm2_5 * 100);
|
|
data100[2] = abs(data.mass_concenration_pm4_0 * 100);
|
|
data100[3] = abs(data.mass_concenration_pm10 * 100);
|
|
data100[4] = abs(data.number_concenration_pm0_5 * 100);
|
|
data100[5] = abs(data.number_concenration_pm1_0 * 100);
|
|
data100[6] = abs(data.number_concenration_pm2_5 * 100);
|
|
data100[7] = abs(data.number_concenration_pm4_0 * 100);
|
|
data100[8] = abs(data.number_concenration_pm10 * 100);
|
|
data100[9] = abs(data.typical_particle_size * 100);
|
|
|
|
length = snprintf(buffer, buflen,
|
|
"%u.%02u %u.%02u %u.%02u %u.%02u %u.%02u "
|
|
"%u.%02u %u.%02u %u.%02u %u.%02u %u.%02u\n",
|
|
data100[0] / 100, data100[0] % 100,
|
|
data100[1] / 100, data100[1] % 100,
|
|
data100[2] / 100, data100[2] % 100,
|
|
data100[3] / 100, data100[3] % 100,
|
|
data100[4] / 100, data100[4] % 100,
|
|
data100[5] / 100, data100[5] % 100,
|
|
data100[6] / 100, data100[6] % 100,
|
|
data100[7] / 100, data100[7] % 100,
|
|
data100[8] / 100, data100[8] % 100,
|
|
data100[9] / 100, data100[9] % 100);
|
|
if (length > buflen)
|
|
{
|
|
length = buflen;
|
|
}
|
|
}
|
|
|
|
nxsem_post(&priv->devsem);
|
|
return length;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: sps30_write
|
|
****************************************************************************/
|
|
|
|
static ssize_t sps30_write(FAR struct file *filep, FAR const char *buffer,
|
|
size_t buflen)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: sps30_ioctl
|
|
****************************************************************************/
|
|
|
|
static int sps30_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
|
|
{
|
|
FAR struct inode *inode = filep->f_inode;
|
|
FAR struct sps30_dev_s *priv = inode->i_private;
|
|
struct sps30_word_s param;
|
|
int ret;
|
|
|
|
/* Get exclusive access */
|
|
|
|
do
|
|
{
|
|
ret = nxsem_wait(&priv->devsem);
|
|
|
|
/* The only case that an error should occur here is if the wait was
|
|
* awakened by a signal.
|
|
*/
|
|
|
|
DEBUGASSERT(ret == OK || ret == -EINTR);
|
|
}
|
|
while (ret == -EINTR);
|
|
|
|
#ifndef CONFIG_DISABLE_PSEUDOFS_OPERATIONS
|
|
if (priv->unlinked)
|
|
{
|
|
/* Do not allow operations on unlinked sensors. This allows
|
|
* sensor use on hot swappable I2C bus.
|
|
*/
|
|
|
|
nxsem_post(&priv->devsem);
|
|
return -ENODEV;
|
|
}
|
|
#endif
|
|
|
|
switch (cmd)
|
|
{
|
|
/* Soft reset the SPS30, Arg: None */
|
|
|
|
case SNIOC_RESET:
|
|
{
|
|
ret = sps30_softreset(priv);
|
|
sps30_dbg("softreset ret: %d\n", ret);
|
|
|
|
sps30_configure(priv, priv->started);
|
|
}
|
|
break;
|
|
|
|
/* Start background measurement, Arg: None */
|
|
|
|
case SNIOC_START:
|
|
{
|
|
/* Start measurements (and set pressure compensation). */
|
|
|
|
sps30_set_command_param(¶m, SPS30_MEASUREMENT_MODE);
|
|
ret = sps30_write_cmd(priv, SPS30_CMD_START_MEASUREMENT, ¶m, 1);
|
|
if (ret >= 0)
|
|
{
|
|
priv->started = true;
|
|
}
|
|
}
|
|
break;
|
|
|
|
/* Stop background measurement, Arg: None */
|
|
|
|
case SNIOC_STOP:
|
|
{
|
|
/* Stop measurements. */
|
|
|
|
ret = sps30_write_cmd(priv, SPS30_CMD_STOP_MEASUREMENT, NULL, 0);
|
|
if (ret >= 0)
|
|
{
|
|
priv->started = false;
|
|
}
|
|
}
|
|
break;
|
|
|
|
/* Set fan auto cleaning interval measurement interval, Arg: uint32_t */
|
|
|
|
case SNIOC_SET_CLEAN_INTERVAL:
|
|
{
|
|
if (arg != (uint32_t)arg)
|
|
{
|
|
ret = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
if (arg > 0 && arg < 15)
|
|
{
|
|
arg = 15;
|
|
}
|
|
|
|
sps30_set_command_param(¶m, arg);
|
|
ret = sps30_write_cmd(priv, SPS30_CMD_SET_AUTO_CLEANING_INTERVAL,
|
|
¶m, 1);
|
|
}
|
|
break;
|
|
|
|
/* Start fan cleaning, Arg: None */
|
|
|
|
case SNIOC_START_FAN_CLEANING:
|
|
{
|
|
if (!priv->started)
|
|
{
|
|
ret = -EBUSY;
|
|
break;
|
|
}
|
|
|
|
ret = sps30_write_cmd(priv, SPS30_CMD_START_FAN_CLEANING, NULL, 0);
|
|
}
|
|
break;
|
|
|
|
/* Read sensor data, Arg: struct sps30_conv_data_s *data */
|
|
|
|
case SNIOC_READ_CONVERT_DATA:
|
|
{
|
|
FAR struct sps30_conv_data_s *data =
|
|
(FAR struct sps30_conv_data_s *)arg;
|
|
|
|
ret = sps30_read_values(priv, data, false);
|
|
if (ret < 0)
|
|
{
|
|
sps30_dbg("cannot read data: %d\n", ret);
|
|
}
|
|
}
|
|
break;
|
|
|
|
default:
|
|
sps30_dbg("Unrecognized cmd: %d\n", cmd);
|
|
ret = -ENOTTY;
|
|
break;
|
|
}
|
|
|
|
nxsem_post(&priv->devsem);
|
|
return ret;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: sps30_unlink
|
|
****************************************************************************/
|
|
|
|
#ifndef CONFIG_DISABLE_PSEUDOFS_OPERATIONS
|
|
static int sps30_unlink(FAR struct inode *inode)
|
|
{
|
|
FAR struct sps30_dev_s *priv;
|
|
int ret;
|
|
|
|
DEBUGASSERT(inode != NULL && inode->i_private != NULL);
|
|
priv = (FAR struct sps30_dev_s *)inode->i_private;
|
|
|
|
/* Get exclusive access */
|
|
|
|
do
|
|
{
|
|
ret = nxsem_wait(&priv->devsem);
|
|
|
|
/* The only case that an error should occur here is if the wait was
|
|
* awakened by a signal.
|
|
*/
|
|
|
|
DEBUGASSERT(ret == OK || ret == -EINTR);
|
|
}
|
|
while (ret == -EINTR);
|
|
|
|
/* Are there open references to the driver data structure? */
|
|
|
|
if (priv->crefs <= 0)
|
|
{
|
|
nxsem_destroy(&priv->devsem);
|
|
kmm_free(priv);
|
|
return OK;
|
|
}
|
|
|
|
/* No... just mark the driver as unlinked and free the resources when
|
|
* the last client closes their reference to the driver.
|
|
*/
|
|
|
|
priv->unlinked = true;
|
|
nxsem_post(&priv->devsem);
|
|
return ret;
|
|
}
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_SPS30_I2C
|
|
/****************************************************************************
|
|
* Name: sps30_register_i2c
|
|
*
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* Description:
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* Register the SPS30 character device as 'devpath'
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*
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* Input Parameters:
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* devpath - The full path to the driver to register. E.g., "/dev/particle0"
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* i2c - An instance of the I2C interface to use to communicate with
|
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* the SPS30
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* addr - The I2C address of the SPS30. The I2C address of SPS30 is
|
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* always 0x69.
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|
*
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* Returned Value:
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|
* Zero (OK) on success; a negated errno value on failure.
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|
*
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|
****************************************************************************/
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|
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int sps30_register_i2c(FAR const char *devpath, FAR struct i2c_master_s *i2c,
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|
uint8_t addr)
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{
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FAR struct sps30_dev_s *priv;
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int ret;
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|
|
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DEBUGASSERT(i2c != NULL);
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DEBUGASSERT(addr == CONFIG_SPS30_ADDR);
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DEBUGASSERT(sps30_crc_word(0xBEEF) == 0x92);
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|
|
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/* Initialize the device structure */
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|
|
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priv = (FAR struct sps30_dev_s *)kmm_zalloc(sizeof(struct sps30_dev_s));
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if (priv == NULL)
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|
{
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|
sps30_dbg("ERROR: Failed to allocate instance\n");
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|
return -ENOMEM;
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|
}
|
|
|
|
priv->i2c = i2c;
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|
priv->addr = addr;
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|
priv->started = false;
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|
|
|
nxsem_init(&priv->devsem, 0, 1);
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|
|
|
/* Register the character driver */
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|
|
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ret = register_driver(devpath, &g_sps30fops, 0666, priv);
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|
if (ret < 0)
|
|
{
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|
sps30_dbg("ERROR: Failed to register driver: %d\n", ret);
|
|
kmm_free(priv);
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|
}
|
|
|
|
return ret;
|
|
}
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#endif /* CONFIG_SPS30_I2C */
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|
|
|
#endif /* CONFIG_SENSORS_SPS30 */
|