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sps30.c
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sps30.c
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/*
* Copyright (c) 2018, Sensirion AG
* 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 following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* * Neither the name of Sensirion AG nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS 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.
*/
#include "sps30.h"
#include "sensirion_shdlc.h"
#include "sps_git_version.h"
#define SPS30_ADDR 0x00
#define SPS30_CMD_START_MEASUREMENT 0x00
#define SPS30_CMD_STOP_MEASUREMENT 0x01
#define SPS30_SUBCMD_MEASUREMENT_START \
{ 0x01, 0x03 }
#define SPS30_CMD_READ_MEASUREMENT 0x03
#define SPS30_CMD_FAN_CLEAN_INTV 0x80
#define SPS30_CMD_FAN_CLEAN_INTV_LEN 5
#define SPS30_SUBCMD_READ_FAN_CLEAN_INTV 0x00
#define SPS30_CMD_START_FAN_CLEANING 0x56
#define SPS30_CMD_DEV_INFO 0xd0
#define SPS30_CMD_DEV_INFO_SUBCMD_GET_SERIAL \
{ 0x03 }
#define SPS30_CMD_READ_VERSION 0xd1
#define SPS30_CMD_RESET 0xd3
#define SPS30_ERR_STATE(state) (SPS30_ERR_STATE_MASK | (state))
const char *sps_get_driver_version(void) {
return SPS_DRV_VERSION_STR;
}
int16_t sps30_probe(void) {
char serial[SPS30_MAX_SERIAL_LEN];
int16_t ret = sps30_get_serial(serial);
return ret;
}
int16_t sps30_get_serial(char *serial) {
struct sensirion_shdlc_rx_header header;
uint8_t param_buf[] = SPS30_CMD_DEV_INFO_SUBCMD_GET_SERIAL;
int16_t ret;
ret = sensirion_shdlc_xcv(SPS30_ADDR, SPS30_CMD_DEV_INFO, sizeof(param_buf),
param_buf, SPS30_MAX_SERIAL_LEN, &header,
(uint8_t *)serial);
if (ret < 0)
return ret;
if (header.state)
return SPS30_ERR_STATE(header.state);
return 0;
}
int16_t sps30_start_measurement(void) {
struct sensirion_shdlc_rx_header header;
uint8_t param_buf[] = SPS30_SUBCMD_MEASUREMENT_START;
return sensirion_shdlc_xcv(SPS30_ADDR, SPS30_CMD_START_MEASUREMENT,
sizeof(param_buf), param_buf, 0, &header, NULL);
}
int16_t sps30_stop_measurement(void) {
struct sensirion_shdlc_rx_header header;
return sensirion_shdlc_xcv(SPS30_ADDR, SPS30_CMD_STOP_MEASUREMENT, 0, NULL,
0, &header, NULL);
}
int16_t sps30_read_measurement(struct sps30_measurement *measurement) {
struct sensirion_shdlc_rx_header header;
int16_t ret;
uint16_t idx;
union {
uint16_t u16_value[2];
uint32_t u32_value;
float f32_value;
} val, data[10];
ret = sensirion_shdlc_xcv(SPS30_ADDR, SPS30_CMD_READ_MEASUREMENT, 0, NULL,
sizeof(data), &header, (uint8_t *)data);
if (ret)
return ret;
if (header.data_len != sizeof(data))
return SPS30_ERR_NOT_ENOUGH_DATA;
idx = 0;
val.u32_value = be32_to_cpu(data[idx].u32_value);
measurement->mc_1p0 = val.f32_value;
++idx;
val.u32_value = be32_to_cpu(data[idx].u32_value);
measurement->mc_2p5 = val.f32_value;
++idx;
val.u32_value = be32_to_cpu(data[idx].u32_value);
measurement->mc_4p0 = val.f32_value;
++idx;
val.u32_value = be32_to_cpu(data[idx].u32_value);
measurement->mc_10p0 = val.f32_value;
++idx;
val.u32_value = be32_to_cpu(data[idx].u32_value);
measurement->nc_0p5 = val.f32_value;
++idx;
val.u32_value = be32_to_cpu(data[idx].u32_value);
measurement->nc_1p0 = val.f32_value;
++idx;
val.u32_value = be32_to_cpu(data[idx].u32_value);
measurement->nc_2p5 = val.f32_value;
++idx;
val.u32_value = be32_to_cpu(data[idx].u32_value);
measurement->nc_4p0 = val.f32_value;
++idx;
val.u32_value = be32_to_cpu(data[idx].u32_value);
measurement->nc_10p0 = val.f32_value;
++idx;
val.u32_value = be32_to_cpu(data[idx].u32_value);
measurement->typical_particle_size = val.f32_value;
if (header.state)
return SPS30_ERR_STATE(header.state);
return 0;
}
int16_t sps30_get_fan_auto_cleaning_interval(uint32_t *interval_seconds) {
struct sensirion_shdlc_rx_header header;
uint8_t tx_data[] = {SPS30_SUBCMD_READ_FAN_CLEAN_INTV};
int16_t ret;
ret = sensirion_shdlc_xcv(
SPS30_ADDR, SPS30_CMD_FAN_CLEAN_INTV, sizeof(tx_data), tx_data,
sizeof(*interval_seconds), &header, (uint8_t *)interval_seconds);
if (ret < 0)
return ret;
*interval_seconds = be32_to_cpu(*interval_seconds);
if (header.state)
return SPS30_ERR_STATE(header.state);
return 0;
}
int16_t sps30_set_fan_auto_cleaning_interval(uint32_t interval_seconds) {
struct sensirion_shdlc_rx_header header;
uint8_t ix;
uint8_t cleaning_command[SPS30_CMD_FAN_CLEAN_INTV_LEN];
uint32_t value = be32_to_cpu(interval_seconds);
cleaning_command[0] = SPS30_SUBCMD_READ_FAN_CLEAN_INTV;
for (ix = 0; ix < sizeof(uint32_t); ix++)
cleaning_command[ix + 1] = (uint8_t)(value >> (8 * ix));
return sensirion_shdlc_xcv(
SPS30_ADDR, SPS30_CMD_FAN_CLEAN_INTV, sizeof(cleaning_command),
(const uint8_t *)cleaning_command, sizeof(interval_seconds), &header,
(uint8_t *)&interval_seconds);
}
int16_t sps30_get_fan_auto_cleaning_interval_days(uint8_t *interval_days) {
int16_t ret;
uint32_t interval_seconds;
ret = sps30_get_fan_auto_cleaning_interval(&interval_seconds);
if (ret < 0)
return ret;
*interval_days = interval_seconds / (24 * 60 * 60);
return ret;
}
int16_t sps30_set_fan_auto_cleaning_interval_days(uint8_t interval_days) {
return sps30_set_fan_auto_cleaning_interval((uint32_t)interval_days * 24 *
60 * 60);
}
int16_t sps30_start_manual_fan_cleaning(void) {
struct sensirion_shdlc_rx_header header;
return sensirion_shdlc_xcv(SPS30_ADDR, SPS30_CMD_START_FAN_CLEANING, 0,
NULL, 0, &header, NULL);
}
int16_t
sps30_read_version(struct sps30_version_information *version_information) {
struct sensirion_shdlc_rx_header header;
int16_t error;
uint8_t data[7];
error = sensirion_shdlc_xcv(SPS30_ADDR, SPS30_CMD_READ_VERSION, 0, NULL,
sizeof(data), &header, data);
if (error) {
return error;
}
if (header.data_len != sizeof(data)) {
return SPS30_ERR_NOT_ENOUGH_DATA;
}
if (header.state) {
return SPS30_ERR_STATE(header.state);
}
version_information->firmware_major = data[0];
version_information->firmware_minor = data[1];
version_information->hardware_revision = data[3];
version_information->shdlc_major = data[5];
version_information->shdlc_minor = data[6];
return error;
}
int16_t sps30_reset(void) {
return sensirion_shdlc_tx(SPS30_ADDR, SPS30_CMD_RESET, 0, NULL);
}