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Part Number: TIDA-00489
we are using the TIDA 00489 layout and have some test sensors here (no changes made to layout). We are counting the movements detected by the sensor using HWI and increment a counter each time this HWI is triggered. We are using the sensor collector TI 15.4 stack for network communication, however the current measurements we have done so far completely coincide with the ones specified by TI regarding idle, polling peaks, data message peaks a.s.o. But we noticed minor peaks, as the right one in the below picture. It takes ca. 5ms and goes up to approx. 2.4mA.
When the sensor was covered, so no motions were detected, no such peaks were measured, if a lot of movements have been present, the number of measured values by the sensor matched the amount of small peaks we could see in the graph over 10s. So we are very sure, that these peaks originate from the HWI.
I was wondering if we could lower the current consumption by means of doing some changes in the software? Since we are only incrementing a counter maybe during the ISR we could apply some further power restrains?
I welcome any suggestion
When you were doing the power measurements with lots of movement, were most of the peaks the first peak (800uA) or were they the second peak (2.4mA)?
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In reply to clam:
it looked like this. So most of the peaks are around 2.4mA. The time resolution of the measurement device is 500µs.
In reply to Slev1n:
In reply to Fredrik K:
Fredrik K Have you considered using the SensorController?
I have, but
So, do you guys see similar current peaks using HWIs? Any power setting to lower it?
Hey Frederik, thank you for the answer. I have one further easy question, looking into the power modes of the CC1310, I was wondering if I can set the power mode during ISR to idle instead of active, then the CPU would still be off, but current of CC1310 is at 570µA. Am I able to make simple mathematic operations like, adding, subtracting one number or getting RTC ticks in this mode or is the CPU necessary for that?
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