Quantcast
Channel: CodeSection,代码区,Linux操作系统:Ubuntu_Centos_Debian - CodeSec
Viewing all articles
Browse latest Browse all 11063

TL-MR3020 NTP server

$
0
0

I have a small travel router that I no longer use, and I wanted to turn it into a NTP server.

The hardware is pretty well documented here: https://openwrt.org/toh/tp-link/tl-mr3020

For the PPS signal input into the router, I need a GPIO . I found two potential ones from the OpenWRT wiki.

GPIO7, pull down resistor R15 - 7.25kohm - datasheet pin label "GPIO7/JTAG_TDO/I2S_WS" (JTAG data output, I2S word select)

GPIO29, pull down resistor R17 - 7.25kohm - datasheet pin label "JTAG_TCK" (JTAG clock)

Before (see R15 and R17 in the middle top)


TL-MR3020 NTP server

After soldering (pencil for size reference):


TL-MR3020 NTP server
TL-MR3020 NTP server

Software details in next post!

Ref, PPS driver document: https://code.google.com/archive/p/openwrt-stratum1/wikis/PpsGpioPollDriver.wiki

Ref, processor datasheet for the AR9331: https://www.openhacks.com/uploadsproductos/ar9331_datasheet.pdf


Viewing all articles
Browse latest Browse all 11063

Trending Articles