delay.lst

来自「本程式通过4*4键盘的输入控制步进马达的正转和反转,停止转动以及加速和减速.」· LST 代码 · 共 29 行

     1: /*
     2:  *      Delay functions
     3:  *      See delay.h for details
     4:  *
     5:  *      Make sure this code is compiled with full optimization!!!
     6:  */
     7: 
     8: #include        "delay.h"
     9: 
    10: void
    11: DelayMs(unsigned char cnt)
    12: {
    13: #if     XTAL_FREQ <= 2MHZ
    14:         do {
    15:                 DelayUs(996);
    16:         } while(--cnt);
    17: #endif
    18: 
    19: #if    XTAL_FREQ > 2MHZ 
    20:         unsigned char   i;
    21:         do {
    22:                 i = 4;
    23:                 do {
    24:                         DelayUs(250);
    25:                 } while(--i);
    26:         } while(--cnt);
    27: #endif
    28: }