About PRuss

PRuss · 2024-09-17

I'm trying to get USBX Device MSC to work in Standalone mode (without RTOS). I loosely followed @B.Montanari 's example in https://community.st.com/t5/stm32-mcus/how-to-implement-usbx-in-standalone-mode/ta-p/614435, and also referred to a CubeMX exa...

PRuss · 2024-08-14

Over the last couple of years it appears that ST pivoted towards Azure RTOS / ThreadX as the default RTOS for newer STM32s like the STM32U5. This seems in part to be because of the more cohesive set of packages like USBX, FileX, etc. on top of the b...

PRuss · 2020-03-10

I'm hoping this is a simple question. In the reference manual (RM0394 section 39.4.5), the tolerance of the LPUART receiver is specified in Table 204. For example, with BRR = 1024 and 9 bits/1 stop bit, the tolerance is given as 2.33%.I've been ass...

PRuss · 2020-03-03

Hi,I am trying to get some clarification on the accuracy of the STM32L4's HSI16. AN4736 mentions that the HSI16 will leave ST's factory calibrated to [-0.75%, 0.5%] at 30 C. DS11453 section 6.3.8 shows that the drift over 0 to 85 C will be -1% to 1...

PRuss · 2024-09-23

This was apparently caused by a bug in the USBX source. Once I fixed it, things seem to be working.It looks like _ux_device_class_storage_disk_wait just passes the return value of ux_slave_class_storage_media_read (and other similar functions) direc...

PRuss · 2024-09-20

Thanks for the reply. I did increase both the heap and stack significantly, but I'm still having the same issue.

PRuss · 2020-03-10

It's good to get clarification that this is the total drift, and the stabilization time is to 100%. Thanks!

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USBX Device MSC in Standalone mode

Recommendation for RTOS with STM32U5+USB+File System

STM32L4 LPUART receiver tolerance

STM32L4 HSI16 accuracy / stability

Re: USBX Device MSC in Standalone mode

Re: USBX Device MSC in Standalone mode

Re: STM32L4 HSI16 accuracy / stability