飞思卡尔单片机DZ60---SCI(查询接收)

2019-04-15 15:49发布

站内文章 / PIC单片机
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#include /* for EnableInterrupts macro */ #include "derivative.h" /* include peripheral declarations */ //整个功能：PC-单片机-PC，PC串口发数据-单片机串口接收数据-单片机将接收到的数据发送回给PC#define LED_D1 PTDD_PTDD0 #define LED_D1_DIR PTDDD_PTDDD0 #define LED_ON 0 #define LED_OFF 1 unsigned char SCANF_SEND_STRINGS[] = "HELLO MCU WORLD"; unsigned char *pSendString = SCANF_SEND_STRINGS; unsigned char ReceiveString; /*************************************************************/ /* 初始化总线时钟PEE模式 */ /* 外部晶振频率为4MHz，总线频率16MHz */ /*************************************************************/ void INIT_MCG(void) { MCGC2=0x36; while(!MCGSC_OSCINIT); MCGC1=0xb8; while(MCGSC_IREFST); while(MCGSC_CLKST!=0b10); MCGC2_LP = 1; MCGC1 = 0x90; MCGC3 = 0x48; MCGC2_LP = 0; while(!MCGSC_PLLST); while(!MCGSC_LOCK); MCGC1 = 0x10; while(MCGSC_CLKST!=0b11); } //延时函数 void delay(void) { unsigned int i; unsigned int j; for(i = 0; i < 100; i++) for(j = 0; j < 4000; j++); } void main(void) { DisableInterrupts; SOPT1 = 0; INIT_MCG(); EnableInterrupts; /* enable interrupts */ /* include your code here */ LED_D1_DIR = 1; LED_D1 = LED_OFF; //以下为设置波特率，以及初始化SCI1控制寄存器 SCI1BDH = 0X00; SCI1BDL = 0X68;//波特率设置为9600 SCI1C1 = 0x00; //设置SCI1为正常模式，八位数据位，无奇偶校验 SCI1C2 = 0x0C; //RE = 1(bit2)接收器打开 //TE = 1(bit3)发送器打开 while(1) { while(!SCI1S1_RDRF);// SCI1S1_RDRF = 1时，表示接收数据寄存器满，可以取出数据 SCI1S1_RDRF = 0; //清除SCI1S1_RDRF ReceiveString = SCI1D; //将接收寄存器中的数据保存至ReceiveString // LED_D1 = ~LED_D1; // delay(); while(!SCI1S1_TDRE);//SCI1S1_TDRE = 1时，发送数据寄存器（缓存区）空，可以发送数据 SCI1D = ReceiveString;//将接收到的数据，放至发送数据寄存器（缓存区），发送 // LED_D1 = ~LED_D1; // delay(); } for(;;) { __RESET_WATCHDOG(); /* feeds the dog */ } /* loop forever */ /* please make sure that you never leave main */ }   程序改成下面语句，上位机串口发大数据不死机，但可能丢数据。 while(1) { /* while(!SCI1S1_RDRF);// SCI1S1_RDRF = 1时，表示接收数据寄存器满，可以取出数据 SCI1S1_RDRF = 0; //清除SCI1S1_RDRF ReceiveString = SCI1D; //将接收寄存器中的数据保存至ReceiveString while(!SCI1S1_TDRE);//SCI1S1_TDRE = 1时，发送数据寄存器（缓存区）空，可以发送数据 SCI1D = ReceiveString;//将接收到的数据，放至发送数据寄存器（缓存区），发送 */ if(SCI1S1_RDRF == 1) { ReceiveString = SCI1D; if(SCI1S1_TDRE == 1) { SCI1D = ReceiveString; } } }    

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