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LED_C.C
Package: arm_exam.rar　[view]
Upload User: mhstny
Upload Date: 2022-08-05
Package Size: 793k
Code Size: 1k
Category:

ARM-PowerPC-ColdFire-MIPS

Development Platform:

Unix_Linux

LED_C.C：Code Content
  1. #define rGPFCON    (*(volatile unsigned *)0x56000050) //Port F control
  2. #define rGPFDAT    (*(volatile unsigned *)0x56000054) //Port F data
  3. #define rGPFUP     (*(volatile unsigned *)0x56000058) //Pull-up control F
  5. void delay(int times);
  6. void xmain(void)
  7. {
  8. rGPFCON=(rGPFCON|0xFF00)&0x55FF;//GPF4--GPF7设置为output
  9.     rGPFUP|=0xF0;   //disable GPF pull up
  10.    while(1)
  11.     {
  12.       
  13.        rGPFDAT=(rGPFDAT&0x0F)|0xE0;//GPF4 output 0
  14.        delay(500000);//delay
  15.        
  16.        rGPFDAT=(rGPFDAT&0x0F)|0xD0;//GPF5 output 0
  17.        delay(500000);//delay
  18.        
  19.        rGPFDAT=(rGPFDAT&0x0F)|0xB0;//GPF6 output 0
  20.        delay(500000);//delay
  21.        
  22.        rGPFDAT=(rGPFDAT&0x0F)|0x70;//GPF7 output 0
  23.        delay(500000);//delay
  24.        
  25.     }
  26.  }
  27.  
  28.  void delay(int times)
  29.  {
  30.     int i;
  31.     for(i=0;i<times;i++);
  32.  }