I have the ConnectCore 6 Plus Development Kit. I would like to know how to use the following ports as “normal” RS232. The application I have work with Linux PC (with 3 RS232 ports “dev/ttyS1”, “/dev/ttyS2”, “/dev/ttyS3”).
Now I would like to know how to wire up the below 3 ports and cross compile for the SBC (should be “/dev/tty1”,“/dev/tty3” and “/dev/tty5” ?).
UART1: 4 wire, RS-232 level UART
UART3: 4 wire, RS-232 level UART
UART5: 4 wire, TTL UART shared with XBee interface
These three UART interfaces have software flow control lines (RTS and CTS). UART1 and UART3 have RS-232 levels and they are configured in DTE mode (CTS input and RTS output). The UART5 interface has TTL levels and it is configured in DCE mode (CTS output and RTS input).
the above as quoted from the manual.
Can I Use UART 1 & 3 directly with my equipment? How about UART 5 (I have TTL UART to RS232 Converter but with only TX , RX , Gnd & VCC).