UART1 is connected through two jumpers to the programmer chip on the board. Making the use of it very streight forward.
README
This directory contains examples for the stm32f429i discovery board. The PCB should be labelled either MB1075B, and contains a user USB port, 2.4" QVGA TFT LCD display, 64Mbits external SDRAM and ST MEMS gyroscope.
http://www.st.com/web/catalog/tools/FM116/SC959/SS1532/PF259090