Virtual COM port or using raw endpoints?

Question

I\'m developing software in a microcontroller with a USB controller and code example to implement a Virtual COM port.

The implementation it\'s a device that transfer dat

Answer 1

To implement a virtual COM port you also have to use a USB class USB CDC ACM.

https://en.wikipedia.org/wiki/USB_communications_device_class

See this for UART standard baud rates https://electronics.stackexchange.com/questions/9264/what-standard-uart-rates-are-there

110, 300, 600, 1200, 2400, 4800, 9600, 14400, 19200, 38400, 57600, 115200, 230400, 460800, 921600,... High baud rates sometimes make problems

When using USB CDC ACM the device will be recognized as (virtual) COM port and can be accessed via a termin

bulk transfer is the easiest way to transfer data at maximum speed and can be used with the mass storage device class

https://en.wikipedia.org/wiki/USB_mass_storage_device_class

The device will be recognized as mass storage (normal drive like a USB stick)

See this http://www.beyondlogic.org/usbnutshell/usb4.shtml#Bulk

If you need examples and source code for Atmel MCU see the LUFA library (http://www.fourwalledcubicle.com/LUFA.php) or check out the embedded operating systems like Contiki OS. These include USB source code for other MCUs like MSP430,... also