Difference between revisions of "Ms14 uart"
From Wiki for Dragino Project
(→Different modes of UART) |
|||
| Line 16: | Line 16: | ||
If your computer has serial port connect to ms14, you will still able to see output from serial when booting. but it will stop some while after boot. | If your computer has serial port connect to ms14, you will still able to see output from serial when booting. but it will stop some while after boot. | ||
| + | |||
| + | |||
| + | ==Example UART transmit / receive script in LUA== | ||
| + | |||
| + | |||
==Use minicom== | ==Use minicom== | ||
Revision as of 19:08, 21 September 2013
Different modes of UART
ms14 has a uart interface expose on the 2x8 router connector. this interface can be act as:
- Console port to debug the openwrt system inside ms14. refer link here.
or
- UART interface to communicate to other devices such as a avr daughter board.
to disable UART as a console port, user can comment the related line in file /etc/inittab. And reboot the device.
root@dragino2-684db6:/# vi /etc/inittab ::sysinit:/etc/init.d/rcS S boot ::shutdown:/etc/init.d/rcS K shutdown #ttyATH0::askfirst:/bin/ash --login // Comment this line to disable uart as console.
If your computer has serial port connect to ms14, you will still able to see output from serial when booting. but it will stop some while after boot.
Example UART transmit / receive script in LUA
Use minicom
root@dragino2-684db6:/# opkg update Downloading http://downloads.openwrt.org/snapshots/trunk/ar71xx/packages/Packages.gz. Inflating http://downloads.openwrt.org/snapshots/trunk/ar71xx/packages/Packages.gz. Updated list of available packages in /var/opkg-lists/snapshots. root@dragino2-684db6:/# opkg install minicom Installing minicom (2.3-1) to root... Downloading http://downloads.openwrt.org/snapshots/trunk/ar71xx/packages/minicom_2.3-1_ar71xx.ipk. Configuring minicom. root@dragino2-684db6:/# minicom -s // use minicom -s to configure serial port A - Serial Device : /dev/ttyATH0 | // use ttyATH0 as serial port | B - Lockfile Location : /var/lock | | C - Callin Program : | | D - Callout Program : | | E - Bps/Par/Bits : 115200 8N1 | | F - Hardware Flow Control : No | | G - Software Flow Control : No | | | | Change which setting?
