The application must configure the pin mux to route the serial wire data to TDO pin. If this has not been done
already, please copy over the generate lines of code in the box to your application in 'main'. Recompile the
application and load it again.
// Export Serial Wire Data Over TDO pin on XDS110 launchpad
HWREG(SPARE_REG4) = ((HWREG(SPARE_REG4) & SWV_ON_TDO_MASK) | (1 << SWV_ON_TDO_PIN));
Along with this please make sure the target has been setup to 2-pin SWD mode with "Auxillary COM Port Connection" option set to "Aux COM Port is Target TDO pin".