Introduction - If you have any usage issues, please Google them yourself
Serial communication experiment: the results of this experiment, open HyperTerminal, set the baud rate to 115200, data flow control bit is not. Operating system, it will display " UART & Interrupt Experiment, Please Input from the keyboard" , we can write the serial port operation. Debug in flash, you need to modify the RO BASE is 0x00000000, the other not modify, recompile download can run. Note: Due to system interrupt, the program counter will jump to 0x18 Department execute the interrupt service routine, it can not debug the SDRAM.