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bmp280: build on linux and qurt

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Daniel Agar 2019-11-13 15:16:24 -05:00 committed by GitHub
parent d4ddabdf52
commit 99a7491cde
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GPG Key ID: 4AEE18F83AFDEB23
8 changed files with 365 additions and 423 deletions
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1
boards/atlflight/eagle/qurt-default.cmake
View File

@ -45,6 +45,7 @@ px4_add_board(
LABEL qurt-default
DRIVERS
barometer/bmp280
gps
imu/mpu9250
spektrum_rc

1
boards/atlflight/excelsior/qurt-default.cmake
View File

@ -45,6 +45,7 @@ px4_add_board(
LABEL qurt-default
DRIVERS
barometer/bmp280
gps
imu/mpu9250
spektrum_rc

1
boards/beaglebone/blue/cross.cmake
View File

@ -10,6 +10,7 @@ px4_add_board(
DRIVERS
#barometer # all available barometer drivers
barometer/bmp280
batt_smbus
camera_trigger
differential_pressure # all available differential pressure drivers

1
boards/beaglebone/blue/native.cmake
View File

@ -8,6 +8,7 @@ px4_add_board(
DRIVERS
#barometer # all available barometer drivers
barometer/bmp280
batt_smbus
camera_trigger
differential_pressure # all available differential pressure drivers

95
src/drivers/barometer/bmp280/BMP280.hpp Normal file
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@ -0,0 +1,95 @@
/****************************************************************************
*
* Copyright (c) 2012-2016 PX4 Development Team. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
* 3. Neither the name PX4 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 OWNER 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.
*
****************************************************************************/
#pragma once
#include "bmp280.h"
/*
* BMP280 internal constants and data structures.
*/
class BMP280 : public cdev::CDev, public px4::ScheduledWorkItem
{
public:
BMP280(bmp280::IBMP280 *interface, const char *path);
virtual ~BMP280();
virtual int init();
virtual ssize_t read(cdev::file_t *filp, char *buffer, size_t buflen);
virtual int ioctl(cdev::file_t *filp, int cmd, unsigned long arg);
/**
* Diagnostics - print some basic information about the driver.
*/
void print_info();
private:
bmp280::IBMP280 *_interface;
bool _running;
uint8_t _curr_ctrl;
unsigned _report_interval; // 0 - no cycling, otherwise period of sending a report
unsigned _max_measure_interval; // interval in microseconds needed to measure
ringbuffer::RingBuffer *_reports;
bool _collect_phase;
orb_advert_t _baro_topic;
int _orb_class_instance;
int _class_instance;
perf_counter_t _sample_perf;
perf_counter_t _measure_perf;
perf_counter_t _comms_errors;
struct bmp280::calibration_s *_cal; //stored calibration constants
struct bmp280::fcalibration_s _fcal; //pre processed calibration constants
float _P; /* in Pa */
float _T; /* in K */
/* periodic execution helpers */
void start_cycle();
void stop_cycle();
void Run() override;
int measure(); //start measure
int collect(); //get results and publish
};

2
src/drivers/barometer/bmp280/CMakeLists.txt
View File

@ -37,9 +37,11 @@ px4_add_module(
COMPILE_FLAGS
-Wno-cast-align # TODO: fix and enable
SRCS
BMP280.hpp
bmp280_spi.cpp
bmp280_i2c.cpp
bmp280.cpp
bmp280_main.cpp
DEPENDS
px4_work_queue
)

427
src/drivers/barometer/bmp280/bmp280.cpp
View File

@ -31,84 +31,7 @@
*
****************************************************************************/
/**
* @file bmp280.cpp
* Driver for the BMP280 barometric pressure sensor connected via I2C TODO or SPI.
*/
#include "bmp280.h"
enum BMP280_BUS {
BMP280_BUS_ALL = 0,
BMP280_BUS_I2C_INTERNAL,
BMP280_BUS_I2C_EXTERNAL,
BMP280_BUS_SPI_INTERNAL,
BMP280_BUS_SPI_EXTERNAL
};
/*
* BMP280 internal constants and data structures.
*/
class BMP280 : public cdev::CDev, public px4::ScheduledWorkItem
{
public:
BMP280(bmp280::IBMP280 *interface, const char *path);
virtual ~BMP280();
virtual int init();
virtual ssize_t read(struct file *filp, char *buffer, size_t buflen);
virtual int ioctl(struct file *filp, int cmd, unsigned long arg);
/**
* Diagnostics - print some basic information about the driver.
*/
void print_info();
private:
bmp280::IBMP280 *_interface;
bool _running;
uint8_t _curr_ctrl;
unsigned _report_interval; // 0 - no cycling, otherwise period of sending a report
unsigned _max_measure_interval; // interval in microseconds needed to measure
ringbuffer::RingBuffer *_reports;
bool _collect_phase;
orb_advert_t _baro_topic;
int _orb_class_instance;
int _class_instance;
perf_counter_t _sample_perf;
perf_counter_t _measure_perf;
perf_counter_t _comms_errors;
struct bmp280::calibration_s *_cal; //stored calibration constants
struct bmp280::fcalibration_s _fcal; //pre processed calibration constants
float _P; /* in Pa */
float _T; /* in K */
/* periodic execution helpers */
void start_cycle();
void stop_cycle();
void Run() override;
int measure(); //start measure
int collect(); //get results and publish
};
/*
* Driver 'main' command.
*/
extern "C" __EXPORT int bmp280_main(int argc, char *argv[]);
#include "BMP280.hpp"
BMP280::BMP280(bmp280::IBMP280 *interface, const char *path) :
CDev(path),
@ -239,7 +162,7 @@ BMP280::init()
}
ssize_t
BMP280::read(struct file *filp, char *buffer, size_t buflen)
BMP280::read(cdev::file_t *filp, char *buffer, size_t buflen)
{
unsigned count = buflen / sizeof(sensor_baro_s);
sensor_baro_s *brp = reinterpret_cast<sensor_baro_s *>(buffer);
@ -291,7 +214,7 @@ BMP280::read(struct file *filp, char *buffer, size_t buflen)
}
int
BMP280::ioctl(struct file *filp, int cmd, unsigned long arg)
BMP280::ioctl(cdev::file_t *filp, int cmd, unsigned long arg)
{
switch (cmd) {
@ -310,7 +233,7 @@ BMP280::ioctl(struct file *filp, int cmd, unsigned long arg)
/* FALLTHROUGH */
default: {
if (interval == 0) {
interval = (USEC_PER_SEC / arg);
interval = (1000000 / arg);
}
/* do we need to start internal polling? */
@ -478,345 +401,3 @@ BMP280::print_info()
_reports->get(&brp);
print_message(brp);
}
/**
* Local functions in support of the shell command.
*/
namespace bmp280
{
/*
list of supported bus configurations
*/
struct bmp280_bus_option {
enum BMP280_BUS busid;
const char *devpath;
BMP280_constructor interface_constructor;
uint8_t busnum;
uint32_t device;
bool external;
BMP280 *dev;
} bus_options[] = {
#if defined(PX4_SPIDEV_EXT_BARO) && defined(PX4_SPI_BUS_EXT)
{ BMP280_BUS_SPI_EXTERNAL, "/dev/bmp280_spi_ext", &bmp280_spi_interface, PX4_SPI_BUS_EXT, PX4_SPIDEV_EXT_BARO, true, NULL },
#endif
#if defined(PX4_SPIDEV_BARO)
# if defined(PX4_SPIDEV_BARO_BUS)
{ BMP280_BUS_SPI_INTERNAL, "/dev/bmp280_spi_int", &bmp280_spi_interface, PX4_SPIDEV_BARO_BUS, PX4_SPIDEV_BARO, false, NULL },
# else
{ BMP280_BUS_SPI_INTERNAL, "/dev/bmp280_spi_int", &bmp280_spi_interface, PX4_SPI_BUS_SENSORS, PX4_SPIDEV_BARO, false, NULL },
# endif
#endif
#if defined(PX4_I2C_BUS_ONBOARD) && defined(PX4_I2C_OBDEV_BMP280)
{ BMP280_BUS_I2C_INTERNAL, "/dev/bmp280_i2c_int", &bmp280_i2c_interface, PX4_I2C_BUS_ONBOARD, PX4_I2C_OBDEV_BMP280, false, NULL },
#endif
#if defined(PX4_I2C_BUS_EXPANSION) && defined(PX4_I2C_OBDEV_BMP280)
{ BMP280_BUS_I2C_EXTERNAL, "/dev/bmp280_i2c_ext", &bmp280_i2c_interface, PX4_I2C_BUS_EXPANSION, PX4_I2C_OBDEV_BMP280, true, NULL },
#endif
};
#define NUM_BUS_OPTIONS (sizeof(bus_options)/sizeof(bus_options[0]))
bool start_bus(struct bmp280_bus_option &bus);
struct bmp280_bus_option &find_bus(enum BMP280_BUS busid);
void start(enum BMP280_BUS busid);
void test(enum BMP280_BUS busid);
void reset(enum BMP280_BUS busid);
void info();
void usage();
/**
* Start the driver.
*/
bool
start_bus(struct bmp280_bus_option &bus)
{
if (bus.dev != nullptr) {
PX4_ERR("bus option already started");
exit(1);
}
bmp280::IBMP280 *interface = bus.interface_constructor(bus.busnum, bus.device, bus.external);
if (interface->init() != OK) {
delete interface;
PX4_WARN("no device on bus %u", (unsigned)bus.busid);
return false;
}
bus.dev = new BMP280(interface, bus.devpath);
if (bus.dev == nullptr) {
return false;
}
if (OK != bus.dev->init()) {
delete bus.dev;
bus.dev = nullptr;
return false;
}
int fd = open(bus.devpath, O_RDONLY);
/* set the poll rate to default, starts automatic data collection */
if (fd == -1) {
PX4_ERR("can't open baro device");
exit(1);
}
if (ioctl(fd, SENSORIOCSPOLLRATE, SENSOR_POLLRATE_DEFAULT) < 0) {
close(fd);
PX4_ERR("failed setting default poll rate");
exit(1);
}
close(fd);
return true;
}
/**
* Start the driver.
*
* This function call only returns once the driver
* is either successfully up and running or failed to start.
*/
void
start(enum BMP280_BUS busid)
{
uint8_t i;
bool started = false;
for (i = 0; i < NUM_BUS_OPTIONS; i++) {
if (busid == BMP280_BUS_ALL && bus_options[i].dev != NULL) {
// this device is already started
continue;
}
if (busid != BMP280_BUS_ALL && bus_options[i].busid != busid) {
// not the one that is asked for
continue;
}
started |= start_bus(bus_options[i]);
}
if (!started) {
PX4_WARN("bus option number is %d", i);
PX4_ERR("driver start failed");
exit(1);
}
// one or more drivers started OK
exit(0);
}
/**
* find a bus structure for a busid
*/
struct bmp280_bus_option &find_bus(enum BMP280_BUS busid)
{
for (uint8_t i = 0; i < NUM_BUS_OPTIONS; i++) {
if ((busid == BMP280_BUS_ALL ||
busid == bus_options[i].busid) && bus_options[i].dev != NULL) {
return bus_options[i];
}
}
PX4_ERR("bus %u not started", (unsigned)busid);
exit(1);
}
/**
* Perform some basic functional tests on the driver;
* make sure we can collect data from the sensor in polled
* and automatic modes.
*/
void
test(enum BMP280_BUS busid)
{
struct bmp280_bus_option &bus = find_bus(busid);
sensor_baro_s report;
ssize_t sz;
int ret;
int fd;
fd = open(bus.devpath, O_RDONLY);
if (fd < 0) {
PX4_ERR("open failed (try 'bmp280 start' if the driver is not running)");
exit(1);
}
/* do a simple demand read */
sz = read(fd, &report, sizeof(report));
if (sz != sizeof(report)) {
PX4_ERR("immediate read failed");
exit(1);
}
print_message(report);
/* read the sensor 5x and report each value */
for (unsigned i = 0; i < 5; i++) {
struct pollfd fds;
/* wait for data to be ready */
fds.fd = fd;
fds.events = POLLIN;
ret = poll(&fds, 1, 2000);
if (ret != 1) {
PX4_ERR("timed out waiting for sensor data");
exit(1);
}
/* now go get it */
sz = read(fd, &report, sizeof(report));
if (sz != sizeof(report)) {
PX4_ERR("periodic read failed");
exit(1);
}
print_message(report);
}
close(fd);
PX4_ERR("PASS");
exit(0);
}
/**
* Reset the driver.
*/
void
reset(enum BMP280_BUS busid)
{
struct bmp280_bus_option &bus = find_bus(busid);
int fd;
fd = open(bus.devpath, O_RDONLY);
if (fd < 0) {
PX4_ERR("failed ");
exit(1);
}
if (ioctl(fd, SENSORIOCRESET, 0) < 0) {
PX4_ERR("driver reset failed");
exit(1);
}
if (ioctl(fd, SENSORIOCSPOLLRATE, SENSOR_POLLRATE_DEFAULT) < 0) {
PX4_ERR("driver poll restart failed");
exit(1);
}
exit(0);
}
/**
* Print a little info about the driver.
*/
void
info()
{
for (uint8_t i = 0; i < NUM_BUS_OPTIONS; i++) {
struct bmp280_bus_option &bus = bus_options[i];
if (bus.dev != nullptr) {
PX4_WARN("%s", bus.devpath);
bus.dev->print_info();
}
}
exit(0);
}
void
usage()
{
PX4_WARN("missing command: try 'start', 'info', 'test', 'test2', 'reset'");
PX4_WARN("options:");
PX4_WARN(" -X (external I2C bus TODO)");
PX4_WARN(" -I (internal I2C bus TODO)");
PX4_WARN(" -S (external SPI bus)");
PX4_WARN(" -s (internal SPI bus)");
}
} // namespace
int
bmp280_main(int argc, char *argv[])
{
int myoptind = 1;
int ch;
const char *myoptarg = nullptr;
enum BMP280_BUS busid = BMP280_BUS_ALL;
while ((ch = px4_getopt(argc, argv, "XISs", &myoptind, &myoptarg)) != EOF) {
switch (ch) {
case 'X':
busid = BMP280_BUS_I2C_EXTERNAL;
break;
case 'I':
busid = BMP280_BUS_I2C_INTERNAL;
break;
case 'S':
busid = BMP280_BUS_SPI_EXTERNAL;
break;
case 's':
busid = BMP280_BUS_SPI_INTERNAL;
break;
default:
bmp280::usage();
return 0;
}
}
if (myoptind >= argc) {
bmp280::usage();
return -1;
}
const char *verb = argv[myoptind];
/*
* Start/load the driver.
*/
if (!strcmp(verb, "start")) {
bmp280::start(busid);
}
/*
* Test the driver/device.
*/
if (!strcmp(verb, "test")) {
bmp280::test(busid);
}
/*
* Reset the driver.
*/
if (!strcmp(verb, "reset")) {
bmp280::reset(busid);
}
/*
* Print driver information.
*/
if (!strcmp(verb, "info")) {
bmp280::info();
}
PX4_ERR("unrecognized command, try 'start', 'test', 'reset' or 'info'");
return -1;
}

260
src/drivers/barometer/bmp280/bmp280_main.cpp Normal file
View File

@ -0,0 +1,260 @@
/****************************************************************************
*
* Copyright (c) 2012-2016 PX4 Development Team. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
* 3. Neither the name PX4 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 OWNER 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.
*
****************************************************************************/
/**
* @file bmp280.cpp
* Driver for the BMP280 barometric pressure sensor connected via I2C TODO or SPI.
*/
#include "BMP280.hpp"
enum BMP280_BUS {
BMP280_BUS_ALL = 0,
BMP280_BUS_I2C_INTERNAL,
BMP280_BUS_I2C_EXTERNAL,
BMP280_BUS_SPI_INTERNAL,
BMP280_BUS_SPI_EXTERNAL
};
/*
* Driver 'main' command.
*/
extern "C" __EXPORT int bmp280_main(int argc, char *argv[]);
/**
* Local functions in support of the shell command.
*/
namespace bmp280
{
/*
list of supported bus configurations
*/
struct bmp280_bus_option {
enum BMP280_BUS busid;
const char *devpath;
BMP280_constructor interface_constructor;
uint8_t busnum;
uint32_t device;
bool external;
BMP280 *dev;
} bus_options[] = {
#if defined(PX4_SPIDEV_EXT_BARO) && defined(PX4_SPI_BUS_EXT)
{ BMP280_BUS_SPI_EXTERNAL, "/dev/bmp280_spi_ext", &bmp280_spi_interface, PX4_SPI_BUS_EXT, PX4_SPIDEV_EXT_BARO, true, NULL },
#endif
#if defined(PX4_SPIDEV_BARO)
# if defined(PX4_SPIDEV_BARO_BUS)
{ BMP280_BUS_SPI_INTERNAL, "/dev/bmp280_spi_int", &bmp280_spi_interface, PX4_SPIDEV_BARO_BUS, PX4_SPIDEV_BARO, false, NULL },
# else
{ BMP280_BUS_SPI_INTERNAL, "/dev/bmp280_spi_int", &bmp280_spi_interface, PX4_SPI_BUS_SENSORS, PX4_SPIDEV_BARO, false, NULL },
# endif
#endif
#if defined(PX4_I2C_BUS_ONBOARD) && defined(PX4_I2C_OBDEV_BMP280)
{ BMP280_BUS_I2C_INTERNAL, "/dev/bmp280_i2c_int", &bmp280_i2c_interface, PX4_I2C_BUS_ONBOARD, PX4_I2C_OBDEV_BMP280, false, NULL },
#endif
#if defined(PX4_I2C_BUS_EXPANSION) && defined(PX4_I2C_OBDEV_BMP280)
{ BMP280_BUS_I2C_EXTERNAL, "/dev/bmp280_i2c_ext", &bmp280_i2c_interface, PX4_I2C_BUS_EXPANSION, PX4_I2C_OBDEV_BMP280, true, NULL },
#endif
};
#define NUM_BUS_OPTIONS (sizeof(bus_options)/sizeof(bus_options[0]))
/**
* Start the driver.
*/
static bool
start_bus(struct bmp280_bus_option &bus)
{
if (bus.dev != nullptr) {
PX4_ERR("bus option already started");
return false;
}
bmp280::IBMP280 *interface = bus.interface_constructor(bus.busnum, bus.device, bus.external);
if (interface->init() != OK) {
delete interface;
PX4_WARN("no device on bus %u", (unsigned)bus.busid);
return false;
}
bus.dev = new BMP280(interface, bus.devpath);
if (bus.dev == nullptr) {
return false;
}
if (OK != bus.dev->init()) {
delete bus.dev;
bus.dev = nullptr;
return false;
}
int fd = px4_open(bus.devpath, O_RDONLY);
/* set the poll rate to default, starts automatic data collection */
if (fd == -1) {
PX4_ERR("can't open baro device");
return false;
}
if (px4_ioctl(fd, SENSORIOCSPOLLRATE, SENSOR_POLLRATE_DEFAULT) < 0) {
px4_close(fd);
PX4_ERR("failed setting default poll rate");
return false;
}
px4_close(fd);
return true;
}
/**
* Start the driver.
*
* This function call only returns once the driver
* is either successfully up and running or failed to start.
*/
static int
start(enum BMP280_BUS busid)
{
uint8_t i;
bool started = false;
for (i = 0; i < NUM_BUS_OPTIONS; i++) {
if (busid == BMP280_BUS_ALL && bus_options[i].dev != NULL) {
// this device is already started
continue;
}
if (busid != BMP280_BUS_ALL && bus_options[i].busid != busid) {
// not the one that is asked for
continue;
}
started |= start_bus(bus_options[i]);
}
if (!started) {
PX4_WARN("bus option number is %d", i);
PX4_ERR("driver start failed");
return PX4_ERROR;
}
// one or more drivers started OK
return PX4_OK;
}
/**
* Print a little info about the driver.
*/
static int
info()
{
for (uint8_t i = 0; i < NUM_BUS_OPTIONS; i++) {
struct bmp280_bus_option *bus = &bus_options[i];
if (bus != nullptr && bus->dev != nullptr) {
PX4_WARN("%s", bus->devpath);
bus->dev->print_info();
}
}
return 0;
}
static int
usage()
{
PX4_WARN("missing command: try 'start', 'info'");
PX4_WARN("options:");
PX4_WARN(" -X (external I2C bus TODO)");
PX4_WARN(" -I (internal I2C bus TODO)");
PX4_WARN(" -S (external SPI bus)");
PX4_WARN(" -s (internal SPI bus)");
return 0;
}
} // namespace
int
bmp280_main(int argc, char *argv[])
{
int myoptind = 1;
int ch;
const char *myoptarg = nullptr;
enum BMP280_BUS busid = BMP280_BUS_ALL;
while ((ch = px4_getopt(argc, argv, "XISs", &myoptind, &myoptarg)) != EOF) {
switch (ch) {
case 'X':
busid = BMP280_BUS_I2C_EXTERNAL;
break;
case 'I':
busid = BMP280_BUS_I2C_INTERNAL;
break;
case 'S':
busid = BMP280_BUS_SPI_EXTERNAL;
break;
case 's':
busid = BMP280_BUS_SPI_INTERNAL;
break;
default:
return bmp280::usage();
}
}
if (myoptind >= argc) {
return bmp280::usage();
}
const char *verb = argv[myoptind];
/*
* Start/load the driver.
*/
if (!strcmp(verb, "start")) {
return bmp280::start(busid);
}
/*
* Print driver information.
*/
if (!strcmp(verb, "info")) {
return bmp280::info();
}
return bmp280::usage();
}