2024-11-11 07:22 PM
Hi ,
Regarding working with the STM32WLE5 with SUBGHZ block in the CUBE-MX.
in the clock section tab in the CUBE-MX I dont see any mention of the RF-PLL clock.
if i understood correctly - in order to work with the LORA SUB-GHZ BLOCK i need to supply a 32 Mhz HSE clock .
I dont see in the clock section tab in the CUBE-MX any mention of this "must -have" 32 mhz HSE clock .
it seems any clock source is possible and any frequency is possible .
Does the clock section tab in the CUBE-MX dont represent the CLOCK tree in the STM32WLE5 ?
I see this issue even when I open example code for sughz block within the CUBE-MX.
Thank you,
Viola
Solved! Go to Solution.
2024-11-22 10:23 AM
Hello @viola
There are 2 'main' clocks for 2 independent system:
I've request to add a warning or a restriction on using the Radio module without HSE enabled (internal ticket number 196877).
The RF-PLL is used as the frequency synthesizer for the generation of the local oscillator
frequency (flo) for both transmit and receive chains. The RF-PLL uses auto calibration and
uses the 32 MHz HSE32 reference. So, it is not a Clock that should be set on the clock tree of the MX, it works will HSE is available, and it can be set by Set_RfFrequency() command that take the Channel RF frequency as input (868MHz...).
Best Regards.
STTwo-32
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2024-11-22 10:23 AM
Hello @viola
There are 2 'main' clocks for 2 independent system:
I've request to add a warning or a restriction on using the Radio module without HSE enabled (internal ticket number 196877).
The RF-PLL is used as the frequency synthesizer for the generation of the local oscillator
frequency (flo) for both transmit and receive chains. The RF-PLL uses auto calibration and
uses the 32 MHz HSE32 reference. So, it is not a Clock that should be set on the clock tree of the MX, it works will HSE is available, and it can be set by Set_RfFrequency() command that take the Channel RF frequency as input (868MHz...).
Best Regards.
STTwo-32
To give better visibility on the answered topics, please click on Accept as Solution on the reply which solved your issue or answered your question.