Stm Usb Vcp Serial Data To

When the new perspective opens, click Run Resume (or the play button on the toolbar).

Note that if you are using a Nucleo board with an STM32F401 or STM32F411, you will need to solder an external crystal to the board, as it is unpopulated on those boards.

Well be sending our compiled program over to the ST-LINK side of the board, and the VCP will enumerate on the USB lines that we just added.

I dont have a bootloader working (yet) to where we can send binary files over VCP, but thats on my to-do list.

In the Pinout Configuration tab, go to Categories Connectivity and click USB.

Stm Usb Vcp Serial Data To

This tells the USB stack that we want to enumerate as a CDC device, which will allow us to send serial data to and from our computer across the USB lines.

By default, the Nucleo-F042K6 board is configured for 8 MHz clocks for almost everything.

Luckily, you can just click Yes on the pop-up when asked to run the automatic clock issues solver.

This should automatically change all of the necessary clocks to 48 MHz.

The STM32F042K6 comes with 6 kB of RAM, which isnt a whole lot.

USB functionality takes up probably 2-3 kB worth of that memory, so we need to be careful about how we use the rest.

These parameters essentially reserve sections of data memory for the heap and stack.

By setting 0x200 and 0x400, weve told the processor to reserve 1 kB of RAM for the heap and stack, respectively.

We need to lower one of them in order to accommodate the USB functions.

I chose heap, as it seems less likely well be using dynamically allocated memory for this application.

You will need to go into the Device Configuration Tool (the.ioc file) and adjust the stack and heap settings as described above.

Alternatively, you can go into the.ld linker script and look for the MinHeapSize and MinStackSize settings there (just know that this file will be overwritten if you make changes in the graphical Device Configuration Tool).

Notice that you have several USB-related files that have been added.

USB Communication Device Class.

Under USER CODE BEGIN 3 (but still inside the while loop), enter the following.

We then wait for 1 second before repeating this action ad infinitum.

A pop-up window will appear asking you to create a new launch configuration.

Note that if you are not using a Nucleo board or an ST-LINK, you can change the hardware debugger (e.g.

Segger J-LINK) in the Debugger tab.

If you are using a Nucleo, leave everything as default and click OK.

Stm Usb Vcp Driver For Mac