delay.c

00001 /*----------------------------------------------------------------------------------*/
00002 /*
00003 high level delay routines - see delay.h for more info.
00004 
00005 Designed by Shane Tolmie of KeyGhost corporation.  Freely distributable.
00006 Questions and comments to shane@keyghost.com
00007 PICuWEB - Program PIC micros with C. Site has FAQ and sample source code. http://www.workingtex.com/htpic
00008 
00009 For Microchip PIC18xxxxx and Hi-Tech C
00010 
00011 */
00012 /*----------------------------------------------------------------------------------*/
00013 
00014 /*  History:                                                                        
00015     -------- 
00016     2006-02-02        -improvements in code layout... i.o.w. making it more readable                                                                       
00017 
00018 */
00019 
00020 /*  TO DO:                                                                          
00021     ------      
00022 */
00023 
00024 /*----------------------------------------------------------------------------------*/
00025 
00026 #ifndef __DELAY_C
00027 #define __DELAY_C
00028 
00029 /*--------------------------------------------------------*/
00030 /*                        includes                        */
00031 /*--------------------------------------------------------*/
00032 #include <mbed.h>
00033 #include <delay.h>
00034 #include <main.h>
00035 
00036 /*--------------------------------------------------------*/
00037 /*                         globals                        */
00038 /*--------------------------------------------------------*/
00039 unsigned char delayus_variable;
00040 
00041 void CLRWDT(){};
00042 
00043 /*****************************************************************************************************************/
00044 /*****************************************************************************************************************/
00045 
00046 void DelayBigUs(unsigned int cnt)
00047 {
00048     unsigned char    i;
00049 
00050     i = (unsigned char)(cnt>>8);
00051     while(i>=1)
00052     {
00053         i--;
00054         DelayUs(253);
00055         CLRWDT();
00056     }
00057     DelayUs((unsigned char)(cnt & 0xFF));
00058 }
00059 
00060 void DelayMs(unsigned char cnt)
00061 {
00062     unsigned char    i;
00063     do {
00064         i = 4;
00065         do {
00066             DelayUs(250);
00067             CLRWDT();
00068         } while(--i);
00069     } while(--cnt);
00070 }
00071 
00072 //this copy is for the interrupt function
00073 void DelayMs_interrupt(unsigned char cnt)
00074 {
00075     unsigned char    i;
00076     do {
00077         i = 4;
00078         do {
00079             DelayUs(250);
00080         } while(--i);
00081     } while(--cnt);
00082 }
00083 
00084 void DelayBigMs(unsigned int cnt)
00085 {
00086     unsigned char    i;
00087     do {
00088         i = 4;
00089         do {
00090             DelayUs(250);
00091             CLRWDT();
00092         } while(--i);
00093     } while(--cnt);
00094 }
00095 
00096 void DelayS(unsigned char cnt)
00097 {
00098     unsigned char i;
00099     do {
00100         i = 4;
00101         do {
00102             DelayMs(250);
00103             CLRWDT();
00104         } while(--i);
00105     } while(--cnt);
00106 }
00107 
00108 #endif
00109 
00110