My application requires a serial terminal connection from a laptop. Most laptops don't have a serial port so my idea is to emulate a serial port over a USB connection.
How does one add a USB serial port using the RL-ARM that terminates in the application - as opposed to just doing usb to serial conversion using usbd_vcom_usb2serial()?
I will be using Cortex-M3 LPC1768.
Thanks in advance.
Ian
My knowledge about USB/USBCDC is very limited. I have some experience on LPC2368/LPC1768 USBCDC development, but my USB solution is LPCUSB (an open source GPL project), not the KEIL USBCDC example, nor the RL-USB.
My understanding is, just as you have already noticed, it is impossible to use the RL-USB to create a [two Virtual COM Ports with one USB connection] device.
If you finally get a USB solution for MCU, which can create a [two Virtual COM Ports with one USB connection] device; you still need to handle the driver development on the PC side, otherwise the PC-OS will not recognize the multi-COM-ports correctly.
But if your USBCDC device can talk to the PC successfully, then the PC software should be able to specify where the data will be sent to. I mean, the PC software can tell your USBCDC device, this data is sent to MCU-Peripheral-A, that data is sent to MCU-Peripheral-B.