Firmware upgrade using USB key on STM32L4

Find an MSC HOST for your architecture

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

Any ideas ?

Hi,

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

Best regards

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

Thank you for your answer.

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

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

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 ?

> 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