Bug: Cube MX PLL configuration

[Narasimha Murthy Gururaj]

Posted on December 15, 2017 at 21:53

After generating the code using cube MX version 4.22.1 for STM32L476VG board, I noticed that RCC_OscInitStruct.PLL.PLLM does not get assigned to any value in SystemClock_Config().

Due to this RCC_PLLCFGR register enables unwanted PLLs.

For eg in my case I was expecting only PLLR to be enabled with register value to be 0x1002a71 but it turned out to be RCC_PLLCFGR = 0x7737f71 where PLLQ and PLLP is also eanabled.

As any one else noticed this issue?

[Imen.D]

Posted on December 18, 2017 at 12:47

Hello ,

Please try to use the last version of CubeMx 4.23.

Best Regards

Imen

[Szymon PANECKI · Accepted solution]

Posted on December 18, 2017 at 12:59

Thanks Imen for your quick feedback. Indeed the solution here is to use CubeMX 4.23, the latest revision at the moment.

I confirm that there was such problem in previous version of STM32CubeMX. PLLM parameter was not set properly. Now it is fixed.

Regards

Szymon