1.宏定义
//以下定义来自windows里的winbase.h并改造
#define CBR_110             11E1
#define CBR_300             3E2
#define CBR_600             6E2
#define CBR_1200            12E2
#define CBR_2400            24E2
#define CBR_4800            48E2
#define CBR_9600            96E2
#define CBR_14400           144E2
#define CBR_19200           192E2
#define CBR_38400           384E2
#define CBR_56000           56E3
#define CBR_57600           576E2
#define CBR_115200          1152E2
#define CBR_128000          128E3
#define CBR_256000          256E3

#define CPU_FREQ     150E6
#define LSPCLK_FREQ  CPU_FREQ/4
#define SCI_FREQ     CBR_38400//波特率38400
#define SCI_PRD     (LSPCLK_FREQ/(SCI_FREQ*8))-1//此法在头文件中应用时不清晰
//以下由菜农改编
#define SCI_BAUD(baud) (LSPCLK_FREQ/(baud*8))-1

2.设置波特率
          SciaRegs.SCIHBAUD = 0x0000;
          SciaRegs.SCILBAUD = SCI_PRD;//实际的BaudRate在头文件中
//或    SciaRegs.SCILBAUD = SCI_BAUD(CBR_38400);//此法较清晰,BaudRate=38400