Hello All,
I'm currently struggling with using serial port on Ramips RT5350 Target
- for me it looks like a bug. I tried this on an Intenso M2M drive and
and WIZnet WizFi630A.
used boards:
- Intenso M2M has one serial port, with the console /dev/ttyS0
- WIZnet WizFi has two serial ports /dev/ttyS0 and /dev/ttyS1 which also
has the console.
If I use stock Lede (tried OpenWrt as well) I can communicate with the
console on both devices - so the serial port/setup is fine on my PC.
Then I disabled the EarlyPrintK and added console=null to the kernel
parameters and removed the "ash" line from /etc/inittab. So far as
expected I don't get output on the former console port.
when I now run
minicom -D /dev/ttyS0 -b 115200
on the WizFi (which accesses the Port that was not used as console
before) I can communicate bidirectional. Everything fine as expected.
when I run
minicom -D /dev/ttyS1 -b 115200
on the WizFi (or ttyS0 on the Intenso M2M) datatransmission is only
unidirectional.
I can send Data from the PC to the serial port and receive it via minicom.
But when I send data from minicom it is not sent to the serial port!
Can someone give me a hint where to look or investigate more closely?
Regards Tobias
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