Nulceo WB55 Example not waking up from stop mode from LPUART

[Manoj1]

I have referred to the Example project "LPUART_WakeUpFromStop_Init". Configured an LP-UART in interrupt mode with a baud rate of 9600, Stop bit 1, Parity None, and enabled the HSI clock source for it. When the device enters the stop mode, try to send a character to wake it. But it is not all waking up.

We need to try this on Nulceo WB55 evaluation board. Once it works, we need to use it on our product which uses the uC STM32WB55VGQ.

[Andrew Neil]

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@Manoj1 wrote:

We need to (sic?)  try this on Nulceo WB55 

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Do you mean you are trying this on a Nucleo WB55 ?

Are you certain that it actually does enter STOP mode?

[STTwo-32]

Hello @Manoj1 

Have you tested the example "LPUART_WakeUpFromStop_Init" as it is, if it is working fine, you shoudl check the impact of your changes on the code. Also, you may check if the Code enter stop mode and if HSI16 oscillator is forced ON even in Stop mode.

Best Regards.

STTwo-32

[Manoj1]

Answer to

1. Yes, I am trying this on the Nuleo WB55 evaluation board.
2.  Yes, it entered the stop mode.

[Manoj1]

Please find the attachment, which has the project I have configured by referring to the example project. I did the same on the STM32 WB55. If there are any issues with my project, let me know.

[STTwo-32]

Have you tested the original ST Example. If it is working fine, please try to make a step by step changing so you can discover the error source.

Best Regards.

STTwo-32