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PSoC 4 MCU

jizh_1737961
New Contributor II

I use CY8C4248LQI-BL583 to design a 4 channels ADC application. I also use BLE to transfer acquired data out. It works fine when I set "Vref selection" in ADC  at VDDA and VDDA/2. But BLE can't work when I set "Vref selection" in ADC  at Internal 1.024 volts (or others). Anyone know why? And how can I solve this problem?

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4 Replies
himam_31
Employee

Hello,

Can you give more details.

1)Can you attach the project?

2)Can you give more details on the failure. What exactly is the problem you are facing? Is the BLE not advertising?

Thanks,

Hima

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jizh_1737961
New Contributor II

Hi Hima,

Thank you for your reply.

My project acquires data in 4 channels and send data over ble. It works OK

when my selection of Vref selection" in ADC is VDDA. I want to find out if

Vref selection causes the noise in data, and I tried to select internal 1.024

volts. I found that BLE only works in very short time and goes to sleep

when I press button to wake it up. Does selection of Vref in ADC affect BLE

works?

I attached my project for your analysis. Thank you very much.

hima <community-manager@cypress.com> 于2019年1月7日周一 上午12:17写道:

<http://www.cypress.com>

Cypress Developer Community

<https://community.cypress.com/?et=watches.email.thread>

Why does selection of Vref in ADC affect BLE work?

reply from hima

<https://community.cypress.com/people/hima?et=watches.email.thread> in *PSoC

4 BLE* - View the full discussion

<https://community.cypress.com/message/183398?et=watches.email.thread#183398>

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himam_31
Employee

Will you please let us know if the issue can be recreated on the development kit?

Thanks,

Hima

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jizh_1737961
New Contributor II

Hi Hima,

Thank you for your reply.

My project acquires data in 4 channels and send data over ble. It works OK when my selection of Vref selection" in ADC is VDDA. I want to find out if Vref selection causes the noise in data, and I tried to select internal 1.024 volts. I found that BLE only works in very short time and goes to sleep when I press button to wake it up. Does selection of Vref in ADC affect BLE works?

I attached my project for your analysis. Thank you very much.

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