About the DSPS

Hi,
I have some question about the DSPS.
1) Can the pin of the uart be defined by myself? For example,
#define UART2_PORT GPIO_PORT_2
#define UART2_PIN_TX GPIO_PIN_8
#define UART2_PIN_RX GPIO_PIN_9

#define UART1_TX_PORT GPIO_PORT_1
#define UART1_TX_PIN GPIO_PIN_2
#define UART1_RX_PORT GPIO_PORT_1
#define UART1_RX_PIN GPIO_PIN_3
#define UART1_RTS_PORT GPIO_PORT_2
#define UART1_RTS_PIN GPIO_PIN_3
#define UART1_CTS_PORT GPIO_PORT_2
#define UART1_CTS_PIN GPIO_PIN_4
2) Can I use UART2 for printing debugging information while UART1 is used to receive data from other devices?
3) I changed the defintion of the UART pin, then the dialog14580 can't send broadcast packets. I dont know how to solve it, Please give me some advise.
Thanks.