diff options
Diffstat (limited to 'src/drivers/meas_airspeed/meas_airspeed.cpp')
-rw-r--r-- | src/drivers/meas_airspeed/meas_airspeed.cpp | 112 |
1 files changed, 69 insertions, 43 deletions
diff --git a/src/drivers/meas_airspeed/meas_airspeed.cpp b/src/drivers/meas_airspeed/meas_airspeed.cpp index 06d89abf7..beca28e7a 100644 --- a/src/drivers/meas_airspeed/meas_airspeed.cpp +++ b/src/drivers/meas_airspeed/meas_airspeed.cpp @@ -104,7 +104,7 @@ class MEASAirspeed : public Airspeed { public: - MEASAirspeed(int bus, int address = I2C_ADDRESS_MS4525DO, const char* path = PATH_MS4525); + MEASAirspeed(int bus, int address = I2C_ADDRESS_MS4525DO, const char *path = PATH_MS4525); protected: @@ -123,7 +123,7 @@ protected: */ extern "C" __EXPORT int meas_airspeed_main(int argc, char *argv[]); -MEASAirspeed::MEASAirspeed(int bus, int address, const char* path) : Airspeed(bus, address, +MEASAirspeed::MEASAirspeed(int bus, int address, const char *path) : Airspeed(bus, address, CONVERSION_INTERVAL, path) { @@ -161,23 +161,25 @@ MEASAirspeed::collect() ret = transfer(nullptr, 0, &val[0], 4); if (ret < 0) { - perf_count(_comms_errors); - perf_end(_sample_perf); + perf_count(_comms_errors); + perf_end(_sample_perf); return ret; } - uint8_t status = val[0] & 0xC0; + uint8_t status = (val[0] & 0xC0) >> 6; - if (status == 2) { - log("err: stale data"); - perf_count(_comms_errors); - perf_end(_sample_perf); - return ret; - } else if (status == 3) { - log("err: fault"); - perf_count(_comms_errors); - perf_end(_sample_perf); - return ret; + switch (status) { + case 0: + break; + + case 1: + /* fallthrough */ + case 2: + /* fallthrough */ + case 3: + perf_count(_comms_errors); + perf_end(_sample_perf); + return -EAGAIN; } int16_t dp_raw = 0, dT_raw = 0; @@ -193,19 +195,21 @@ MEASAirspeed::collect() */ const float P_min = -1.0f; const float P_max = 1.0f; - float diff_press_pa = fabsf( ( ((float)dp_raw - 0.1f*16383.0f) * (P_max-P_min)/(0.8f*16383.0f) + P_min) * 6894.8f) - _diff_pres_offset; - if (diff_press_pa < 0.0f) - diff_press_pa = 0.0f; + float diff_press_pa = fabsf((((float)dp_raw - 0.1f * 16383.0f) * (P_max - P_min) / (0.8f * 16383.0f) + P_min) * 6894.8f) - _diff_pres_offset; + + if (diff_press_pa < 0.0f) { + diff_press_pa = 0.0f; + } struct differential_pressure_s report; /* track maximum differential pressure measured (so we can work out top speed). */ if (diff_press_pa > _max_differential_pressure_pa) { - _max_differential_pressure_pa = diff_press_pa; + _max_differential_pressure_pa = diff_press_pa; } report.timestamp = hrt_absolute_time(); - report.error_count = perf_event_count(_comms_errors); + report.error_count = perf_event_count(_comms_errors); report.temperature = temperature; report.differential_pressure_pa = diff_press_pa; report.voltage = 0; @@ -261,8 +265,9 @@ MEASAirspeed::cycle() } /* measurement phase */ - if (OK != measure()) + if (OK != measure()) { log("measure error"); + } /* next phase is collection */ _collect_phase = true; @@ -303,15 +308,17 @@ start(int i2c_bus) { int fd; - if (g_dev != nullptr) + if (g_dev != nullptr) { errx(1, "already started"); + } /* create the driver, try the MS4525DO first */ g_dev = new MEASAirspeed(i2c_bus, I2C_ADDRESS_MS4525DO, PATH_MS4525); /* check if the MS4525DO was instantiated */ - if (g_dev == nullptr) + if (g_dev == nullptr) { goto fail; + } /* try the MS5525DSO next if init fails */ if (OK != g_dev->Airspeed::init()) { @@ -319,22 +326,26 @@ start(int i2c_bus) g_dev = new MEASAirspeed(i2c_bus, I2C_ADDRESS_MS5525DSO, PATH_MS5525); /* check if the MS5525DSO was instantiated */ - if (g_dev == nullptr) + if (g_dev == nullptr) { goto fail; + } /* both versions failed if the init for the MS5525DSO fails, give up */ - if (OK != g_dev->Airspeed::init()) + if (OK != g_dev->Airspeed::init()) { goto fail; + } } /* set the poll rate to default, starts automatic data collection */ fd = open(AIRSPEED_DEVICE_PATH, O_RDONLY); - if (fd < 0) + if (fd < 0) { goto fail; + } - if (ioctl(fd, SENSORIOCSPOLLRATE, SENSOR_POLLRATE_DEFAULT) < 0) + if (ioctl(fd, SENSORIOCSPOLLRATE, SENSOR_POLLRATE_DEFAULT) < 0) { goto fail; + } exit(0); @@ -345,7 +356,7 @@ fail: g_dev = nullptr; } - errx(1, "driver start failed"); + errx(1, "no MS4525 airspeed sensor connected"); } /** @@ -379,21 +390,24 @@ test() int fd = open(AIRSPEED_DEVICE_PATH, O_RDONLY); - if (fd < 0) + if (fd < 0) { err(1, "%s open failed (try 'meas_airspeed start' if the driver is not running", AIRSPEED_DEVICE_PATH); + } /* do a simple demand read */ sz = read(fd, &report, sizeof(report)); - if (sz != sizeof(report)) + if (sz != sizeof(report)) { err(1, "immediate read failed"); + } warnx("single read"); warnx("diff pressure: %8.4f pa", (double)report.differential_pressure_pa); /* start the sensor polling at 2Hz */ - if (OK != ioctl(fd, SENSORIOCSPOLLRATE, 2)) + if (OK != ioctl(fd, SENSORIOCSPOLLRATE, 2)) { errx(1, "failed to set 2Hz poll rate"); + } /* read the sensor 5x and report each value */ for (unsigned i = 0; i < 5; i++) { @@ -404,14 +418,16 @@ test() fds.events = POLLIN; ret = poll(&fds, 1, 2000); - if (ret != 1) + if (ret != 1) { errx(1, "timed out waiting for sensor data"); + } /* now go get it */ sz = read(fd, &report, sizeof(report)); - if (sz != sizeof(report)) + if (sz != sizeof(report)) { err(1, "periodic read failed"); + } warnx("periodic read %u", i); warnx("diff pressure: %8.4f pa", (double)report.differential_pressure_pa); @@ -419,8 +435,9 @@ test() } /* reset the sensor polling to its default rate */ - if (OK != ioctl(fd, SENSORIOCSPOLLRATE, SENSOR_POLLRATE_DEFAULT)) + if (OK != ioctl(fd, SENSORIOCSPOLLRATE, SENSOR_POLLRATE_DEFAULT)) { errx(1, "failed to set default rate"); + } errx(0, "PASS"); } @@ -433,14 +450,17 @@ reset() { int fd = open(AIRSPEED_DEVICE_PATH, O_RDONLY); - if (fd < 0) + if (fd < 0) { err(1, "failed "); + } - if (ioctl(fd, SENSORIOCRESET, 0) < 0) + if (ioctl(fd, SENSORIOCRESET, 0) < 0) { err(1, "driver reset failed"); + } - if (ioctl(fd, SENSORIOCSPOLLRATE, SENSOR_POLLRATE_DEFAULT) < 0) + if (ioctl(fd, SENSORIOCSPOLLRATE, SENSOR_POLLRATE_DEFAULT) < 0) { err(1, "driver poll restart failed"); + } exit(0); } @@ -451,8 +471,9 @@ reset() void info() { - if (g_dev == nullptr) + if (g_dev == nullptr) { errx(1, "driver not running"); + } printf("state @ %p\n", g_dev); g_dev->print_info(); @@ -491,32 +512,37 @@ meas_airspeed_main(int argc, char *argv[]) /* * Start/load the driver. */ - if (!strcmp(argv[1], "start")) + if (!strcmp(argv[1], "start")) { meas_airspeed::start(i2c_bus); + } /* * Stop the driver */ - if (!strcmp(argv[1], "stop")) + if (!strcmp(argv[1], "stop")) { meas_airspeed::stop(); + } /* * Test the driver/device. */ - if (!strcmp(argv[1], "test")) + if (!strcmp(argv[1], "test")) { meas_airspeed::test(); + } /* * Reset the driver. */ - if (!strcmp(argv[1], "reset")) + if (!strcmp(argv[1], "reset")) { meas_airspeed::reset(); + } /* * Print driver information. */ - if (!strcmp(argv[1], "info") || !strcmp(argv[1], "status")) + if (!strcmp(argv[1], "info") || !strcmp(argv[1], "status")) { meas_airspeed::info(); + } meas_airspeed_usage(); exit(0); |