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I'm using a Prolific PL2303HX-based Sewell USB to serial cable to go from my laptop to an ARM7 embedded development board. The adapter talks ok to a modem and other devices, so I know I have the device and the permissions right. When I try to talk to the board through the cross-platform version of the gdb debugger, arm-elf-gdb, I get: (gdb) target /rdi /dev/ttyUSB0 (gdb) Could not open device "dev/ttyUSB0" I've tried it both as root and as a mortal. What tools do people use to work with serial port problems? I fooled around with setserial, but it seemed rather displeased at the device, saying "Cannot get serial info: Invalid argument". I tried fooling around with Minicom, but it REALLY REALLY wants to talk to a modem, and doesn't want to let me talk to the serial port until I've dialed a number. Any clues? Thanks.
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