I am using DE0 Nano with Cyclone V SoC and Angstrom running on HPS.
I have enabled the UART1 in Qsys with FPGA option, and then routed the Tx and Rx to GPIO_0 pins 0 and 1.
I have verified in ‘/etc/systemd/system’ that getty is being used with ‘ttyS0’.
However any write to ‘/dev/ttyS1’ provides nothing on the GPIO pins. (verified with oscilloscope)
For example echo 0xFF > /dev/ttyS1
Also echo 0xFF > /dev/ttyS0 produces an output 0XFF on the console. .
Does anyone know what can be the issue here?