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
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