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bcf2
10年前发布

C语言串口测试程序代码

#include<stdio.h>  unsigned int UART0_ADDR = 0x20080000;  unsigned int retu=0;  int i=0;  void delay_x(unsigned short cycles)  {          unsigned short t;      t = cycles;      while ( --t != 0 );  }  int  main()  {  ///////////初始化部分////////////////////////////////////////////////////      retu = *(unsigned int *)(UART0_ADDR  + 0X30);//uart_cr      *(unsigned int *)(UART0_ADDR  + 0X30) = 0x300;    //  retu = *(unsigned int *)(UART0_ADDR  + 0X24);//ibrd    //  retu = *(unsigned int *)(UART0_ADDR  + 0X28);//fbrd     *(unsigned int *)(UART0_ADDR  + 0X24) = 1;     *(unsigned int *)(UART0_ADDR  + 0X28) = 40;     *(unsigned int *)(UART0_ADDR  + 0X30) = 0x300;           *(unsigned int *)(UART0_ADDR  + 0X2c) = 0x60;//UART_LCR_H     *(unsigned int *)(UART0_ADDR  + 0X34) = 0x12; //UART_IFLS     *(unsigned int *)(UART0_ADDR  + 0X38) = 0x0;//UART_IMSC                  retu = *(unsigned int *)(UART0_ADDR  + 0X30);//uart_cr             *(unsigned int *)(UART0_ADDR  + 0X30) = retu | 0x01;//使能串口  //////////////////////////////////////////////////////////         while(1)      {     // retu = *(unsigned int *)(UART0_ADDR  + 0X18);    //  retu = retu&0x40;      if(((*(unsigned int *)(UART0_ADDR  + 0X18))&0x40)==0x40)      {          retu = *(unsigned int *)(UART0_ADDR  + 0X00);          retu = retu&0xff;          *(unsigned int *)(UART0_ADDR  + 0X00) = retu;      }      retu = 0;      delay_x(0X7000);      }      return 0;  }