About LMorr.3

LMorr.3 · 2024-08-26

Hello,I am using the STM32F373's virtual USB port successfully. I can connect and send packets to the uC from a web browser. I now want to allow the user to update the firmware from the web browser by uploading a file, instead of the traditional me...

LMorr.3 · 2024-07-31

Using an STM32F373, I setup a USB DEVICE virtual port class. The connection does work but it takes disconnecting/reconnecting the USB cable once or twice before it gets detected successfully as a serial port/usb device on my linux box. I use lsusb ...

LMorr.3 · 2024-04-10

Hello,What is the best way to multiplex an output pin to 12 output signals? I currently have 1 output sourcing 3.3v through a 1k resistor which works well, but need it multiplexed to 12 identical outputs. I see the STM32F373 has a max rating of 15m...

LMorr.3 · 2024-03-31

Hello,I setup a USB virtual com port which I use for serial comm. My design has 2 boards; a panel-board and main-board. The main-board has an STM32F373 with a USB-C connector as well as ESD321DYAR diodes for DM and DP USB line protection.The main-b...

LMorr.3 · 2024-02-23

Hello,I need guidance on how to best implement a packet protocol to keep the data on multiple STM32F373 in sync with each other. If possible, I would like to reach a 'refresh rate' of 30ms. Packet payloads for data refreshed could be up to 50 bytes...

LMorr.3 · 2024-08-29

From what I gather, it's not possible to 'brick' the STM32F373 if the STM32Cube programmer app is used. The STM32Cube programmer download can also fail under the same conditions, but the user can just re-start the download if it fails. In my case, ...

LMorr.3 · 2024-08-29

Thanks for the info. I had to spin up new boards ( to pull-up the USB DM correctly ) so I need to wait to get those before I can try.I understand what you mean about failed updates. If the USB DFU method fails, I plan on having instructions for the...

LMorr.3 · 2024-08-28

I'm still learning about the best approach. The USB connection starts off as a virtual com port, and then sends a command to the uC to switch it to boot mode via USB DFU. That is as far as I got, but I'm guessing there are github projects which wil...

LMorr.3 · 2024-08-27

I'm looking to implement USB DFU. The solution requires the USB DM to be pulled up to 3.3V using a 1.5k resistor. The problem I'm facing now is that my app was already pulling up the USB DM programatically via a GPIO output. When I go into boot mode...

LMorr.3 · 2024-08-26

Is the simplest way for the user to update firmware on the end-product to connect a USB cable, hold a button on the device while powering it on, and then using the ST app to upload the file?Since it's a web app, I could include instructions for the u...

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Update Firmware over USB Virtual Comm Port

USB Device sometimes not recognized

Multiplex 1 output to 12

ESD protection for 2 USB port connectors

Keeping data on multiple STM32s in Sync

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