Read man cu.
At the top, look at -p and -e. It explicitly says: If you set both -p and -e, no parity is used, which is also the default when you set neither.
No flow control is the default; look at the man page for how to set the variable hardwareflowcontrol.
I can't see a way to set 8 bits and 1 stop bit, but that is the default. I haven't seen any device that uses anything other than 8+1 in about 30 years. You could do the following: Set it using stty on the device before starting cu, and then check with stty that it hasn't been changed.
At the top, look at -p and -e. It explicitly says: If you set both -p and -e, no parity is used, which is also the default when you set neither.
No flow control is the default; look at the man page for how to set the variable hardwareflowcontrol.
I can't see a way to set 8 bits and 1 stop bit, but that is the default. I haven't seen any device that uses anything other than 8+1 in about 30 years. You could do the following: Set it using stty on the device before starting cu, and then check with stty that it hasn't been changed.