Estmated max size of parameters

[Ckjel.1]

I'm referencing to STSW-IMG009 and specifically function VL53L1X_SetInterMeasurementInMs(uint32_t InterMeasMs)

What would be the maximum size of the argument and the value of ClockPLL. I'm re-writing for another platform.

Regards

/Claes

[John E KVAM]

The register is 32bits.

VL53L1X_ERROR VL53L1X_SetInterMeasurementInMs(VL53L1_Dev_t dev, uint16_t InterMeasMs)
{
	uint16_t ClockPLL;
	VL53L1X_ERROR status = 0;
 
	status = VL53L1_RdWord(&dev, VL53L1_RESULT__OSC_CALIBRATE_VAL, &ClockPLL);
	ClockPLL = ClockPLL&0x3FF;
	VL53L1_WrDWord(&dev, VL53L1_SYSTEM__INTERMEASUREMENT_PERIOD,
			(uint32_t)(ClockPLL * InterMeasMs * 1.075));
	return status;
 
}

So if you assume ClockPLL is 0x3ff (because it can be) I'd use 1024 for that.

so 2^32 = 2^10 * InterMeasMs* 1.075.

InterMeasMs = (2^32 / 2^10) /1.075

So I get a max InterMeasMs of 3.9million, which is a LOT of seconds.

If you were going to wait that long, I'd seriously consider turning it all off and restarting it again.

• john