IAR Embedded Workbench Debugging
On Windows "Device Manager", under the node "Ports (COM &amp; LPT)" check there is a "MSP430 Application UART (COMx)" (x should be a number depends on your pc). Then on IAR, open your project options, under "General Options" category, make sure you selected Device as MSP430G2231 or MSP430G2001 (which you use), under "Debugger" category select Driver as FET Debugger, under "FET Debugger" category select Connection as Texas Instruments USB-IF.