atollic truestudio 5.2 stm32 hal drivers

Either the host can specify a baud rate (transmitted over USB and applied to UART), or if the UART has a fixed baud rate, you can ignore baud rate (any baud rate set on the host side will work as it does not apply to USB). The microcontroller cannot set the baud rate on the host. Regarding question 2: I'm not sure I understand it. Even though USB is much faster than UART, flow control is relevant as the application on the host can process data as slow as it likes to.

The USB flow control is managed by the host. In the UART-to-USB direction, you would need to implement flow control on the UART. Additionally, initialization is needed (0 and 1). It might be possible to put all code into CDC_Itf_Receive if blocking UART is used. Since a callback is involved, you cannot put this code into the main loop. It's up to you whether you want to do it in a blocking fashion or using DMA. This happens automatically whenever a packet has been received (and double buffering is not enabled). Step 3: Indicate that you are no longer ready to receive a USB packet Once it's complete, CDC_Itf_Receive will be called.

It immediately returns before the data has actually been received. Other than what the name implies, this function indicates that the app is ready to receive data. Atollic TrueStudio uses the GCC compiler, which is also supported by several other IDEs. It should be easy to set up the project in IDEs other than the Three officially supported ones. Unless you use several buffers to achieve higher throughput, a single call at the start of the program is sufficient.Ĭall USBD_CDC_ReceivePacket. If the macros provided by the HAL libraryis used, then the data sheet and reference manual are your friends to avoid errors.

Indicate that you are no longer ready to receive a USB packetĬall USBD_CDC_SetRxBuffer to set the buffer for receiving the USB data.

Indicate that the code is ready to receive a USB packet.

A general introduction can be found the setup for the USB-to-UART direction should be:

Atollic truestudio 5.2 stm32 hal drivers