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author | Julian Oes <julian@oes.ch> | 2013-08-21 14:21:54 +0200 |
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committer | Julian Oes <julian@oes.ch> | 2013-08-21 14:21:54 +0200 |
commit | 1ede95d252f5401f3bcf94265c42a060833ca8ca (patch) | |
tree | 4f2a755ef538cbaa30496bae41c5516645d114ac /src/drivers/l3gd20/l3gd20.cpp | |
parent | 8083efb60c97ffce5be8dcbf3956ab67cc17d729 (diff) | |
download | px4-firmware-1ede95d252f5401f3bcf94265c42a060833ca8ca.tar.gz px4-firmware-1ede95d252f5401f3bcf94265c42a060833ca8ca.tar.bz2 px4-firmware-1ede95d252f5401f3bcf94265c42a060833ca8ca.zip |
L3GD20 and LSM303D reset and range config working properly now
Diffstat (limited to 'src/drivers/l3gd20/l3gd20.cpp')
-rw-r--r-- | src/drivers/l3gd20/l3gd20.cpp | 131 |
1 files changed, 84 insertions, 47 deletions
diff --git a/src/drivers/l3gd20/l3gd20.cpp b/src/drivers/l3gd20/l3gd20.cpp index de6b753f1..5e0a2119a 100644 --- a/src/drivers/l3gd20/l3gd20.cpp +++ b/src/drivers/l3gd20/l3gd20.cpp @@ -154,6 +154,10 @@ static const int ERROR = -1; #define FIFO_CTRL_STREAM_TO_FIFO_MODE (3<<5) #define FIFO_CTRL_BYPASS_TO_STREAM_MODE (1<<7) +#define L3GD20_DEFAULT_RATE 760 +#define L3GD20_DEFAULT_RANGE_DPS 2000 +#define L3GD20_DEFAULT_FILTER_FREQ 30 + extern "C" { __EXPORT int l3gd20_main(int argc, char *argv[]); } class L3GD20 : public device::SPI @@ -191,9 +195,10 @@ private: orb_advert_t _gyro_topic; unsigned _current_rate; - unsigned _current_range; unsigned _orientation; + unsigned _read; + perf_counter_t _sample_perf; math::LowPassFilter2p _gyro_filter_x; @@ -211,6 +216,11 @@ private: void stop(); /** + * Reset the driver + */ + void reset(); + + /** * Static trampoline from the hrt_call context; because we don't have a * generic hrt wrapper yet. * @@ -274,6 +284,14 @@ private: int set_samplerate(unsigned frequency); /** + * Set the lowpass filter of the driver + * + * @param samplerate The current samplerate + * @param frequency The cutoff frequency for the lowpass filter + */ + void set_driver_lowpass_filter(float samplerate, float bandwidth); + + /** * Self test * * @return 0 on success, 1 on failure @@ -296,12 +314,12 @@ L3GD20::L3GD20(int bus, const char* path, spi_dev_e device) : _gyro_range_rad_s(0.0f), _gyro_topic(-1), _current_rate(0), - _current_range(0), _orientation(SENSOR_BOARD_ROTATION_270_DEG), - _sample_perf(perf_alloc(PC_ELAPSED, "l3gd20_read")), - _gyro_filter_x(250, 30), - _gyro_filter_y(250, 30), - _gyro_filter_z(250, 30) + _read(0), + _sample_perf(perf_alloc(PC_ELAPSED, "l3gd20_read")), + _gyro_filter_x(L3GD20_DEFAULT_RATE, L3GD20_DEFAULT_FILTER_FREQ), + _gyro_filter_y(L3GD20_DEFAULT_RATE, L3GD20_DEFAULT_FILTER_FREQ), + _gyro_filter_z(L3GD20_DEFAULT_RATE, L3GD20_DEFAULT_FILTER_FREQ) { // enable debug() calls _debug_enabled = true; @@ -349,22 +367,7 @@ L3GD20::init() memset(&_reports[0], 0, sizeof(_reports[0])); _gyro_topic = orb_advertise(ORB_ID(sensor_gyro), &_reports[0]); - /* set default configuration */ - write_reg(ADDR_CTRL_REG1, REG1_POWER_NORMAL | REG1_Z_ENABLE | REG1_Y_ENABLE | REG1_X_ENABLE); - write_reg(ADDR_CTRL_REG2, 0); /* disable high-pass filters */ - write_reg(ADDR_CTRL_REG3, 0); /* no interrupts - we don't use them */ - write_reg(ADDR_CTRL_REG4, REG4_BDU); - write_reg(ADDR_CTRL_REG5, 0); - - write_reg(ADDR_CTRL_REG5, REG5_FIFO_ENABLE); /* disable wake-on-interrupt */ - - /* disable FIFO. This makes things simpler and ensures we - * aren't getting stale data. It means we must run the hrt - * callback fast enough to not miss data. */ - write_reg(ADDR_FIFO_CTRL_REG, FIFO_CTRL_BYPASS_MODE); - - set_range(2000); /* default to 2000dps */ - set_samplerate(0); /* max sample rate */ + reset(); ret = OK; out: @@ -464,8 +467,7 @@ L3GD20::ioctl(struct file *filp, int cmd, unsigned long arg) /* set default/max polling rate */ case SENSOR_POLLRATE_MAX: case SENSOR_POLLRATE_DEFAULT: - /* With internal low pass filters enabled, 250 Hz is sufficient */ - return ioctl(filp, SENSORIOCSPOLLRATE, 250); + return ioctl(filp, SENSORIOCSPOLLRATE, L3GD20_DEFAULT_RATE); /* adjust to a legal polling interval in Hz */ default: { @@ -483,12 +485,10 @@ L3GD20::ioctl(struct file *filp, int cmd, unsigned long arg) /* XXX this is a bit shady, but no other way to adjust... */ _call.period = _call_interval = ticks; - // adjust filters - float cutoff_freq_hz = _gyro_filter_x.get_cutoff_freq(); - float sample_rate = 1.0e6f/ticks; - _gyro_filter_x.set_cutoff_frequency(sample_rate, cutoff_freq_hz); - _gyro_filter_y.set_cutoff_frequency(sample_rate, cutoff_freq_hz); - _gyro_filter_z.set_cutoff_frequency(sample_rate, cutoff_freq_hz); + /* adjust filters */ + float cutoff_freq_hz = _gyro_filter_x.get_cutoff_freq(); + float sample_rate = 1.0e6f/ticks; + set_driver_lowpass_filter(sample_rate, cutoff_freq_hz); /* if we need to start the poll state machine, do it */ if (want_start) @@ -533,8 +533,8 @@ L3GD20::ioctl(struct file *filp, int cmd, unsigned long arg) return _num_reports - 1; case SENSORIOCRESET: - /* XXX implement */ - return -EINVAL; + reset(); + return OK; case GYROIOCSSAMPLERATE: return set_samplerate(arg); @@ -543,16 +543,15 @@ L3GD20::ioctl(struct file *filp, int cmd, unsigned long arg) return _current_rate; case GYROIOCSLOWPASS: { - float cutoff_freq_hz = arg; - float sample_rate = 1.0e6f / _call_interval; - _gyro_filter_x.set_cutoff_frequency(sample_rate, cutoff_freq_hz); - _gyro_filter_y.set_cutoff_frequency(sample_rate, cutoff_freq_hz); - _gyro_filter_z.set_cutoff_frequency(sample_rate, cutoff_freq_hz); - return OK; - } + float cutoff_freq_hz = arg; + float sample_rate = 1.0e6f / _call_interval; + set_driver_lowpass_filter(sample_rate, cutoff_freq_hz); + + return OK; + } case GYROIOCGLOWPASS: - return _gyro_filter_x.get_cutoff_freq(); + return _gyro_filter_x.get_cutoff_freq(); case GYROIOCSSCALE: /* copy scale in */ @@ -565,10 +564,12 @@ L3GD20::ioctl(struct file *filp, int cmd, unsigned long arg) return OK; case GYROIOCSRANGE: + /* arg should be in dps */ return set_range(arg); case GYROIOCGRANGE: - return _current_range; + /* convert to dps and round */ + return (unsigned long)(_gyro_range_rad_s * 180.0f / M_PI_F + 0.5f); case GYROIOCSELFTEST: return self_test(); @@ -618,22 +619,23 @@ L3GD20::set_range(unsigned max_dps) { uint8_t bits = REG4_BDU; float new_range_scale_dps_digit; + float new_range; if (max_dps == 0) { max_dps = 2000; } if (max_dps <= 250) { - _current_range = 250; + new_range = 250; bits |= RANGE_250DPS; new_range_scale_dps_digit = 8.75e-3f; } else if (max_dps <= 500) { - _current_range = 500; + new_range = 500; bits |= RANGE_500DPS; new_range_scale_dps_digit = 17.5e-3f; } else if (max_dps <= 2000) { - _current_range = 2000; + new_range = 2000; bits |= RANGE_2000DPS; new_range_scale_dps_digit = 70e-3f; @@ -641,7 +643,7 @@ L3GD20::set_range(unsigned max_dps) return -EINVAL; } - _gyro_range_rad_s = _current_range / 180.0f * M_PI_F; + _gyro_range_rad_s = new_range / 180.0f * M_PI_F; _gyro_range_scale = new_range_scale_dps_digit / 180.0f * M_PI_F; write_reg(ADDR_CTRL_REG4, bits); @@ -656,7 +658,7 @@ L3GD20::set_samplerate(unsigned frequency) if (frequency == 0) frequency = 760; - // use limits good for H or non-H models + /* use limits good for H or non-H models */ if (frequency <= 100) { _current_rate = 95; bits |= RATE_95HZ_LP_25HZ; @@ -683,6 +685,14 @@ L3GD20::set_samplerate(unsigned frequency) } void +L3GD20::set_driver_lowpass_filter(float samplerate, float bandwidth) +{ + _gyro_filter_x.set_cutoff_frequency(samplerate, bandwidth); + _gyro_filter_y.set_cutoff_frequency(samplerate, bandwidth); + _gyro_filter_z.set_cutoff_frequency(samplerate, bandwidth); +} + +void L3GD20::start() { /* make sure we are stopped first */ @@ -702,6 +712,30 @@ L3GD20::stop() } void +L3GD20::reset() +{ + /* set default configuration */ + write_reg(ADDR_CTRL_REG1, REG1_POWER_NORMAL | REG1_Z_ENABLE | REG1_Y_ENABLE | REG1_X_ENABLE); + write_reg(ADDR_CTRL_REG2, 0); /* disable high-pass filters */ + write_reg(ADDR_CTRL_REG3, 0); /* no interrupts - we don't use them */ + write_reg(ADDR_CTRL_REG4, REG4_BDU); + write_reg(ADDR_CTRL_REG5, 0); + + write_reg(ADDR_CTRL_REG5, REG5_FIFO_ENABLE); /* disable wake-on-interrupt */ + + /* disable FIFO. This makes things simpler and ensures we + * aren't getting stale data. It means we must run the hrt + * callback fast enough to not miss data. */ + write_reg(ADDR_FIFO_CTRL_REG, FIFO_CTRL_BYPASS_MODE); + + set_samplerate(L3GD20_DEFAULT_RATE); + set_range(L3GD20_DEFAULT_RANGE_DPS); + set_driver_lowpass_filter(L3GD20_DEFAULT_RATE, L3GD20_DEFAULT_FILTER_FREQ); + + _read = 0; +} + +void L3GD20::measure_trampoline(void *arg) { L3GD20 *dev = (L3GD20 *)arg; @@ -804,6 +838,8 @@ L3GD20::measure() if (_gyro_topic > 0) orb_publish(ORB_ID(sensor_gyro), _gyro_topic, report); + _read++; + /* stop the perf counter */ perf_end(_sample_perf); } @@ -811,6 +847,7 @@ L3GD20::measure() void L3GD20::print_info() { + printf("gyro reads: %u\n", _read); perf_print_counter(_sample_perf); printf("report queue: %u (%u/%u @ %p)\n", _num_reports, _oldest_report, _next_report, _reports); @@ -949,7 +986,7 @@ reset() err(1, "driver reset failed"); if (ioctl(fd, SENSORIOCSPOLLRATE, SENSOR_POLLRATE_DEFAULT) < 0) - err(1, "driver poll restart failed"); + err(1, "accel pollrate reset failed"); exit(0); } |