Hi:
Digi ConnectCore 6Plus Devlopment Kits
https://www.digi.com/resources/documentation/digidocs/embedded/dey/3.0/cc6plus/bsp_r_uart_cc6cc6qp
UART1 and UART3 are 4-wires, RS-232 level.
UART5 is 4-wires, TTL level.
Question:
1) UART1 and UART3 should be able to connect directly to connect to any industrial devices directly without any RS232 shifter , correct?
2) UART5 need a shifter to use with any industrial devices, correct?
3) Where is Pin 1 located? is it near to the MIPI Display connector ?
https://www.digi.com/resources/documentation/digidocs/pdfs/90001499.pdf
4) If UART5 is assign at RS485 the shifter is still required? Link below
https://www.digi.com/resources/documentation/digidocs/embedded/dey/3.0/cc6plus/bsp_r_uart_cc6cc6qp#example-configure-rs-485-port-on-connectcore-6-plus-sbc.
5) How to modify the device tree as per Link above to assign UART5 as RS485?
Regards
simon
Are you asking about module or the SBC?
on the module all ports are TTL 3.3v level, on the SBC on the expansion connector:
UART1 and UART3 are 4-wires, RS-232 level.
UART5 is 4-wires, TTL level. (3.3V)
> UART1 and UART3 should be able to connect directly to connect to any industrial devices directly without any RS232 shifter, correct?
RS485 device tree can be found here:
https://www.digi.com/resources/documentation/digidocs/embedded/dey/3.0/cc6plus/bsp_r_uart_cc6cc6qp
The TTL level depends on the VCC of the device so it is not always 3.3v on all devices. Many of them are 5V
Hi:
I have the SBC. That means the UART1 and UART3 and UART5 are all at 3.3v.
May I know where is Pin 1 ? (I am unable to paste picture).
Also , how and where to modify the device tree for UART5?
Thanks
> May I know where is Pin 1 ? (I am unable to paste picture).
towards the middle of the board aways from the corner
>Also , how and where to modify the device tree for UART5?
I’ve provided the link above:
&uart5 {
linux,rs485-enabled-at-boot-time;
rs485-rts-active-high;
rs485-rx-during-tx;
rs485-rts-delay = <1 1>;
status = “okay”;
};
Hi:
May I know where is Pin 1 ? (I am unable to paste picture).
towards the middle of the board aways from the corner.
Just to confirm if use the edge of board (where Ethernet Port is) as Reference, going upward will be pin 1 , just like the debug console port (UART 4), correct?