When i power-down mcu, not working ble chips

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yolominwoo
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25 replies posted 10 questions asked 25 sign-ins

When i reboot mcu with cyw43439(Laird sterling lwb-plus), my ble chips not working.

but my mcu system reset 5~10 times it work okay.

yolominwoo_0-1712107393072.png

 

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5 Replies
anavind
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Hi @yolominwoo ,

Could you please give me more context on what you are trying to do? 

Please mention the steps so that we can reproduce your issue on our side.

Regards,

Anavind

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I'm just proting ble_hello_sensor.

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anavind
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50 replies posted 5 likes given 100 sign-ins

Hi @yolominwoo ,

Understood, You are running ble_hello_sensor code example on CYW43439. Are you able to see CYW43439 advertising and are you able to connect to other devices ? 

You mentioned when rebooted CYW43439 is not working properly.

  • did you mean the code example is not running (not advertising, not connecting etc)?
  • did you mean chip is not responding to any commands?
  • Are you able to download firmware after reboot?
  • could you also let us know the host (Linux ?) and platform (IMX , Rpi ?)you are using?
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When power-down my mcu, example code not running.

[0] HelloSensor Start
[0] wiced_bt_stack_init()

stopped point wiced_bt_stack_init()

But, I'm tried some time System Reset, then worked ble_hello_sensor. 

yolominwoo_0-1712885649755.png

 

yolominwoo_1-1712885377050.png

I'm using stm32cubeIDE.

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Jagriti
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25 solutions authored 100 sign-ins 50 replies posted

Hi @yolominwoo ,

Could you please try probing the BT_REG_ON pin and RTS/CTS pins to check if you are getting same signal with MCU reboot and system reset. 
You can check the datasheet in order to check the control signal timing diagram.
https://www.infineon.com/dgdl/Infineon-CYW43439-DataSheet-v05_00-EN.pdf?fileId=8ac78c8c8929aa4d01893...

Thanks and Regards,
Jagriti

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