read-distance
wayland/vl53l1x-time-of-flight/read-distance
Read distance (mm).
read-distance
@/read-distance
Read distance (mm).
DEV@/vl53l1x-device
A VL53L1X device.
UPDpulse
Update. Triggers read.
DONEpulse
Pulse on read.
STATnumber
Status of range measurement:
0 = range valid;
1 = standard deviation of measurement is above the internal defined threshold;
2 = signal value is below the internal defined threshold;
3 = target is below minimum detection threshold;
4 = nothing detected in range - try a longer distance mode if applicable;
5 = hardware failure;
6 = the range is valid, but the wraparound check has not been done;
7 = wrapped target, not matching phases;
9 = crosstalk signal failure;
10 = synchronization interrupt;
13 = target is below minimum detection threshold;
255 = no update.
ACRnumber
Ambient count rate (mega-counts per second).
PSCRnumber
Peak signal count rate (mega-counts per second).
RNGnumber
Range in millimetres.
C++ implementation
node {
void evaluate(Context ctx) {
// The node responds only if there is an input pulse
if (!isInputDirty<input_UPD>(ctx))
return;
// Get a pointer to the `VL53L1X` class instance
auto sensor = getValue<input_DEV>(ctx);
sensor->read();
emitValue<output_RNG>(ctx,sensor->ranging_data.range_mm);
emitValue<output_PSCR>(ctx,sensor->ranging_data.peak_signal_count_rate_MCPS);
emitValue<output_ACR>(ctx,sensor->ranging_data.ambient_count_rate_MCPS);
emitValue<output_STAT>(ctx,sensor->ranging_data.range_status);
emitValue<output_DONE>(ctx,1);
}
}