when i use the ft4232 device, this device will show out "/dev/ttyUSB*",the simple test for send,it will take about 30us.
when i use the hpm5300evk device,this device will show out "/dev/ttyACM*",the simple test for send,it will take about 1.7ms
when i use the ft4232 device, this device will show out "/dev/ttyUSB*",the simple test for send,it will take about 30us.
when i use the hpm5300evk device,this device will show out "/dev/ttyACM*",the simple test for send,it will take about 1.7ms