About dmarks-ls

dmarks-ls · 2025-03-08

I'm starting a project on the STM32U5G9, and one feature we want is USB connectivity, just a simple virtual COM port (CDC class). Looking at the Middleware picker in CubeMX, the only USB-related items are USBPD (don't need Power Delivery at the mome...

dmarks-ls · 2025-02-25

Previously I posted a message thinking that there was an error in AN4221 regarding the checksum and whether it should be complemented. However, looking at (for instance) the Write Memory command, I can see that the command byte sequence and the data...

dmarks-ls · 2025-02-24

I have on my desk an STM32F407 Discovery board and an STM32U083 Nucleo board. My intent is to write software for the F407 to bootload the U083 via I2C. As far as I can tell, these are the general steps:Drive BOOT0 high and pulse the NRST pin on the...

dmarks-ls · 2025-03-09

We do need an RTOS, especially considering we're using TouchGFX. To me, ThreadX is just another RTOS, though the last time I used it was on an ARM7 platform (Digi's Netsilicon line of processors). I just need to port my OS abstraction layer to Thre...

dmarks-ls · 2025-03-09

Pavel,Hmm, this indicates to me that, on the STM32U5 at least, FreeRTOS USB support is a "second class citizen". The fact they're calling it "classic" suggests that what they provide (USBX + ThreadX) in their standard tools is considered "modern", a...

dmarks-ls · 2025-03-09

Hi Marcos,Random user here... I'm able to reproduce your error. I have a starter project for TouchGFX on the STM32U5 using FreeRTOS, so I added two semaphores, one that starts available, one that starts depleted.Here's the code that CubeMX generated...

dmarks-ls · 2025-02-26

OK, after further testing, I am confident that the STM32U073CC does NOT conform to Pattern 11, as shown above by @TDK in revision 65 of AN2606. Specifically, I have a board here with one main controller (STM32F407) and eight U073 devices. We touche...

dmarks-ls · 2025-02-26

OK, after trial and many errors, I've determined that the text is correct, the single length byte is sent as one byte plus its complement (N and ~N). This is opposite the checksum scheme for other data packets, where the checksum is simply the combi...

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User Activity

STM32U5 - USB and FreeRTOS?

AN4221 - Confusing instructions for Read Memory command

STM32U073 - Can you bootload a factory-new device?

Re: STM32U5 - USB and FreeRTOS?

Re: STM32U5 - USB and FreeRTOS?

Re: Freertos semaphore not initialised correctly by CubeMX

Re: STM32U073 - Can you bootload a factory-new device?

Re: AN4221 - Confusing instructions for Read Memory command