About AHugh.2

AHugh.2 · 2024-01-21

Hi,The STM32U5 has a password feature to restrict RDP regression from level 1 to level 0. However it seems that STM32CubeProgrammer CLI is unable to activate this via the USB interface of the built-in bootloader. If I do it via STLink then it works f...

AHugh.2 · 2023-09-27

Hi,I'm trying to resolve a issue I see occasionnaly where my USB CDC-ACM device fails to be detected by Windows/Linux host as it is not responding to the first device descriptor request until the system is fully reset.The scenario:STM32U575 (can repr...

AHugh.2 · 2023-06-12

I'm debugging an issue where my application is using device mode USB with CDC-ACM and when I come to transmit a data packet on a bulk IN endpoint that is either 64 or 128 bytes in length, the data is not received by the host until either a different ...

AHugh.2 · 2023-06-12

Thanks. If you look at the equivalent example for the Nucleo-U575 (which is what I based my code on) the UX_DEVICE_CLASS_CDC_ACM_WRITE_AUTO_ZLP macro is commented out. Might be worth updating the example.https://github.com/STMicroelectronics/STM32Cub...

AHugh.2 · 2023-06-12

I had but had forgotten about it! Thanks - that was exactly it.  The USBX stack has a setting `UX_DEVICE_CLASS_CDC_ACM_WRITE_AUTO_ZLP` that'll send the ZLP when the data packet is a multiple of max packet size. This #define was commented out in my c...

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Unable to set STM32U5 RDP password via USB interface

STM32U5 USB CDC-ACM device gets into state where it fails to respond to device descriptor request

STM32U5 USB (CDC) not transmitting data if in exact multiple of 64 bytes

Re: STM32U5 USB (CDC) not transmitting data if in exact multiple of 64 bytes

Re: STM32U5 USB (CDC) not transmitting data if in exact multiple of 64 bytes