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LPCOPEN usbd_rom_cdc example RTS/DTR

Question asked by Philip Champagne on Aug 2, 2018
Latest reply on Sep 7, 2018 by Philip Champagne

I am using the usbd_rom_cdc example to and the LPC11U68 to create a device that gets accessed via a COM port on the computer. I am using the Xpresso-LPC11U68 board and MCUXpresso IDE v10.2.0.


Here are the issues I am having:

1. I am a novice at writing code for embedded USB devices.

2. I altered the usbd_rom_cdc example and now have it so DTR will trigger the VCOM_SetCtrlLineState function but RTS does not trigger it.

3. I need a way to see when the COM port has opened and closed so that the program will only transmit something out when the COM port is open.


Here are my questions:

1. Does anyone have a good reference where I could read up on developing embbedded USB devices using the CDC class?


2. Does anyone know how I can configure the usbd_rom_cdc example so that when RTS is toggled it triggers the VCOM_SetCtrlLineState function?


3. Does anyone know how I can read when the COM port has opened or closed in the usbd_rom_cdc?