Arduino for STM32

From a quick look there does not seem to be a board definition for that, so you might have to create one yourself.

Have a look here: https://github.com/stm32duino/wiki/wiki/Add-a-new-variant-%28board%29.

The board appears to have a 25MHz crystal, so you want to set up the clock config for that ...

CMSIS definition from https://github.com/stm32duino/Arduino_Core_STM32/blob/main/system/Drivers/CMSIS/Device/ST/STM32F4xx/Include/stm32f407xx.h

I think this should be enough:



// Write to register
RNG -> CR = 0;
RNG -> CR = (RNG -> CR ) | RNG_CR_RNGEN; // enable bit
RNG -> CR |= RNG_CR_RNGEN ...

keepitsimple wrote: Sun Nov 20, 2022 2:51 am The 32F411 datasheet says it has a RNG, and the ST RM0090 datasheet (pages 767-771) clearly explain how the RNG works.

The datasheet I'm looking at does not mention RNG, and RM0090 does not appear to be for F411??

Perhaps you need some #include in your code, like maybe for stm32l0xx_hal_lptim.h?

CAN bus comes to mind. But that might be way off, as it is something I have never used.

I don't normally use the F103 "system memory" serial bootloader for programming, but in response to a recent thread here I did try it. I ran into two problems, as mentioned in that thread.

First problem was that it turned out that the USB-TTL serial converter I tried to use was locked to "8N1 ...

or with soft i2c - you can establish as many of them as you can.


That is one of the other possibilities I had in mind when I said this:


There are additional possibilities as you would have with other boards too, but what I can think of might be contrary to your speed goal.


The other that ...

Maybe leave your connection on the boot jumper pin, and just short the resistor out, either leaving it there or not. I'm not sure how useful the resistor is in the first place when there is no easy way to connect directly to the processor PB2 pin.

Edit:
For use as a button input (but not if you did ...

Where are you getting access to PB2?

From the symptoms you describe, I would guess at the at the boot jumper pin. There is a 100k resistor between that and the pin on the processor.

Good to hear you are making progress.

I would not worry too much about what "Board info" shows. If you have still not loaded a sketch with USB support enabled, there will be no VID or PID to display.

As for Tools> Board part number, for whatever reason, the items are in a different order to what I ...