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path: root/src/drivers/l3gd20/l3gd20.cpp
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Diffstat (limited to 'src/drivers/l3gd20/l3gd20.cpp')
-rw-r--r--src/drivers/l3gd20/l3gd20.cpp131
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);
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-06 08:09:08 +0000