I2C通信不工作当P1_3有限公司nfigured as clock

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Last post
Thu, 2018-04-05 06:32
#1
wisilica
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I2C通信不工作当P1_3有限公司nfigured as clock

Hi,

I am working on a project wherein the dialog DA 14580 chip communicates with a temperature and humidity sensor via I2C. The testing is performed on the PRO board.
Pin P1_3 is configured as SCL and P0_4 is configured as SDA. I am not able to get the communication proper using these gpio assignments. Now, when I change the SCL configuration to pin P0_7 and SDA is still P0_4, the communication works well and the temperature and humidity readings are proper. Please suggest the reason for the same.

Thanks
Wisilica

Device:
DA14580
Thu, 2018-04-05 15:21
PM_Dialog
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Hi wisilica,

Hi wisilica,

This might be related to the 16MHz oscillators sensitivity to crosstalk on P1_2 and P1_3. Fast changing signals like SCL might disturb the 16MHz oscillator. Probably that’s the reason why you are not able to get the communication between DA14583 and the sensor when P1_3 is configured as SCL.

Thanks, PM_Dialog

Wed, 2018-04-11 07:01
(Reply to #2)
wisilica
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Hi,

Hi,
Thanks for the reply. I am using DA 14580 and not 14583 as you have commented. Will the reason for the behavior be the same for both 580 and 583 ?

Thanks
wisilica

Thu, 2018-04-12 17:35
PM_Dialog
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Hi wisilica

Hi wisilica

I wrote DA14583 by mistake. I meant 14580, so I’m sorry for that. By the way the reason for the behavior would be the same for both DA14580 and DA14583.

Thanks, PM_Dialog