I am not familiar with Mini2440, but from your description, there is no driver. So it is recommended that you see which equipment symbols are available at /dev at the linux side of ARM.
The original poster, I am also doing serial communication. I encounter the same problem as you. I ca n’t open the serial device when I run on the ARM. How do you solve it?
Check whether the serial port equipment on the board is:
grep tty/proc/devices
If there is a TTYS device, see if/dem/. TTYS0 C 4 64
I am not familiar with Mini2440, but from your description, there is no driver.
So it is recommended that you see which equipment symbols are available at /dev at the linux side of ARM.
The original poster, I am also doing serial communication. I encounter the same problem as you. I ca n’t open the serial device when I run on the ARM. How do you solve it?