OpenWrt Forum Archive

Topic: SPI MISI connection -> non bootable

The content of this topic has been archived on 21 Apr 2018. There are no obvious gaps in this topic, but there may still be some posts missing at the end.

Post #1
Z oc om
12 Jul 2015, 18:35

Hi there,

I've got a small openwrt router here, which seems to have hardware SPI.
The pins a called:
SPI_MISO
SPI_MISI
SPI_CLK
SPI_CS1

When i connect a cable to MISI (not called MOSI, perhaps a mistake?), the device still boots without a problem ( can see it via USB -> serial interface).
If i connect the cable to a MCP3008 or touch the stripped end of the cable, the device does not start anymore.
It takes 1-3s for it to be able to reboot after releasing the cable again.

As I am quite new to this, i have don't have an idea what mistakes I am doing here smile

Hopefully someone can help   me here!

Z oc om

Post #2
Degeneratescum
13 Jul 2015, 03:24

What are you trying to achieve here by connecting to the SPI pins? They're most likely for programming the flash chip, I wouldn't expect to use them while the device is running.

What's the make & model of the router?

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