Table 5.17. Add-on Interfaces and TTY Device Files
Add-on Interface
TTY Device File
CON1
/dev/ttymxc0
CON2
/dev/ttymxc1
The add-on interface to which the isolated RS485 add-on module is connected can
be seen in the Linux kernel boot log. When connected to CON1,the output is as
follows.
Atmark Techno RS485 board detected at CON1(Rev 1,
⏎
SerialNumber=xxxx).
When using the Linux kernel 3.14.38-at2 or earlier (kernel image uImage-x1-v 2.00
or earlier), the maximum baud rate that can be used is 1500000 [Baud] due to soft-
ware restrictions.
5.12.1. Changing RS422/RS485 Communication Settings
The TTY device RS485 settings are applied automatically.
Setting and Default Values”. Flags shows the logical sum of each bit.
Table 5.18. RS485 Setting and Default Values
Configuration
Description
Default Value
flags
ENABLED (bit0)
0: RS485 disabled
1: RS485 enabled
1
RTS_ON_SEND (bit1)
0: RTS (Driver Enable) is low during data transmission
1: RTS (Driver Enable) is high during data transmission
1
RTS_AFTER_SEND (bit2)
0: RTS (Driver Enable) is low outside of data transmission
1: RTS (Driver Enable) is high outside of data transmission
0
RX_DURING_TX (bit4)
0: Half duplex
1: Full duplex
0
delay_rts_before_send
Delay time before transmission (ms)
0
delay_rts_after_send
Delay time after transmission (ms)
0
Please do not change the default values of RTS_ON_SEND and RTS_AF-
TER_SEND of "flags". If changed, data transmission will no longer be possible.
It is not possible to use a TTY device with RS485 enabled as a console.
Armadillo-IoT Gateway G3Product Manual - INTL
Operational Checks
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