Firmware upgrade using USB key on STM32L4

[MMerc.1]

Hi,

Currently, I know how to upgrade firmware using USB key on STM32F746BGT.

I want to upgrade on STM32L433CCT6 but I can't find example...

Could you help me ?

Best regards

[Tesla DeLorean]

Find an MSC HOST for your architecture

STM32Cube_FW_L4_V1.15.1\Projects\STM32L476G-EVAL\Applications\USB_Host\MSC_Standalone

[MMerc.1]

Hi,

Thanks for your reply.

I have attached the possible configurations.

As you can see, I cannot use Host MSC.

Do you know why ?

Best regards

[Tesla DeLorean]

Does the STM32 you have chose support a USB Host/OTG, or only a USB Device?

https://www.st.com/en/microcontrollers-microprocessors/stm32l433cc.html

[MMerc.1]

Any ideas ?

[MMerc.1]

Hi,

I come to you to see if you have an idea about my problem with the USB device.

Best regards

[waclawek.jan]

The USB module in 'L433 is not capable of being USB host, so you simply can not use it as a MSC host and load firmware from an USB key.

JW

[MMerc.1]

Thank you for your answer.

So the only way is via STM32 ST-LINK Utility or STM32CubeProgrammer ?

[waclawek.jan]

Through PA11/PA12 pins, using the default USB-DFU bootloader? Yes that's the most convenient way.

You can also write your own bootloader and write a counterpart to standard PC, or to a custom hardware acting as USB host; or using custom hardware and making use of the fact that PA11/PA12 are also CAN_TX/RX... All this requires significantly more effort.

JW

[MMerc.1]

Hi,

For DFU mode, can I use a USB stick or do I necessarily need a computer ?

If I use a custom hardware acting as USB host, which mode will the L433 use ?

[waclawek.jan]

> For DFU mode, can I use a USB stick or do I necessarily need a computer ?

USB stick is a Device. You need to have a Host, i.e. a computer.

> If I use a custom hardware acting as USB host, which mode will the L433 use ?

Presumably you would write your own bootloader, then you could use whatever protocol you want, even nonstandard one too.

JW