12 uart – Artesyn COMX-P40x0 ENP2 Installation and Use (January 2015) User Manual
Page 108
BSP
COMX-P40x0 ENP2 Installation and Use (6806800R95C)
108
For the GPIO signals connected to the I2C expander, these are controlled via the "i2c"
command using the I2C address = 0x18. For more information, see
7.12 UART
There are four universal asynchronous receiver/transmitters (UART) in the COMX-P40x0 ENP2
module, each with Tx and Rx signals routed to the COM-E connectors.
The default active console is UART0. The working mode is 115200baud rate, 8 data bit, No
parity, 1 stop bit. Each of the four UART can become the active console by setting the
environment variable "uart#".
The UART boot up message in U-Boot is as follows:
Usage:
UART0
-
setenv uart# 0; saveenv; reset
UART1
-
setenv uart# 1; saveenv; reset
UART2
-
setenv uart# 2; saveenv; reset
UART3
-
setenv uart# 3; saveenv; reset
In :
Serial
Out :
Serial
Err :
Serial
Current Console:
uart#0
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