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Forum Index : Microcontroller and PC projects : Serial Port?
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| toml_12953 Guru  Joined: 13/02/2015 Location: United StatesPosts: 324 |
In the manual it says that OPTION CONSOLE SCREEN will free up the serial port as COM3: but how can I use it as a serial port when the keyboard is plugged into one USB port and the power cord is plugged into the other one? Can it only be used with a PC and not a general RS-232 device? |
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jirsoft Guru Joined: 18/09/2020 Location: Czech RepublicPosts: 532 |
But first: you can connect it to any device which will also power up CMM2 and communicate through serial. Second: you can use serial port for PC communication, when anyway the cable is (for somebody like me) connected to it for power. And Napoleon Commander can then use it for serial copy without needs for any other cable... Jiri Napoleon Commander and SimplEd for CMM2 (GitHub), CMM2.fun |
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vegipete Guru Joined: 29/01/2013 Location: CanadaPosts: 1082 |
The keyboard USB jack (type A) data lines connect directly to the main STM32 processor and are used in host mode to access the keyboard. As far as I know, no serial can be available there without changing the firmware - ain't gonna happen. The power USB jack (type B) data lines connect to the PIC16F1455 chip, which acts as a serial to USB bridge. If you needed the COM3 serial port for another purpose, you could carefully remove the PIC16F1455 and get the 3.3 volt Tx/Rx serial signals from the appropriate pins of the now empty socket. Visit Vegipete's *Mite Library for cool programs. |
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