CC2640R2F: Fast ADC reads causing BLE connection to drop?

GreenAndGrey

Part Number: CC2640R2F

I'm sampling an ADC pin at 100 Hz for 6 seconds, and sending the value over BLE 4.2 to an iOS app. The problem I'm seeing is that randomly during this sampling the iOS app throws an error - "Peripheral disconnected with error code 6". Note that my CC2640R2F is still in the GAPROLE_CONNECTED state, and it has completely finished the ADC sampling. I have reduced printfs in my code to a minimum so there are none during the sampling period.

over 7 years ago

0 IUsedToBeARealPerson (M-W) over 7 years ago

TI__Guru 58425 points

Hi,

How do you implement ADC into your BLE application? Are you setting it up in blocking or callback mode and do you give it it's own task or do you re-use the BLE application task?

0 GreenAndGrey over 7 years ago in reply to IUsedToBeARealPerson (M-W)

Expert 1060 points

I am reading the ADC in the main BLE app task in blocking mode; I followed the ADC single channel example in the SDK.

0 IUsedToBeARealPerson (M-W) over 7 years ago in reply to GreenAndGrey

TI__Guru 58425 points

Hi Green,

I would assume this could cause problems as you would block the main task from doing anything BLE related while performing the ADC readings. I would suggest you try to either use callback mode or move the ADC part into a separate task.

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CC2640R2F: Fast ADC reads causing BLE connection to drop?