PIC CCS C语言程序范例

1、    PIC CCS C语言程序范例The CCS C compiler includes a library of example programs for many common applications. Each example program contains a header with instructions on how to run the example, and if necessary, the wiring instructions for interfacing external devices. Here are thre

2、e such example programs included with our compiler, as well as a list file generated by the compiler which shows the assembly generated toThe CCS C compiler includes a library of example programs for many common applications. Each example program contains a header with instructions on how to run the

3、 example, and if necessary, the wiring instructions for interfacing external devices.Here are three such example programs included with our compiler, as well as a list file generated by the compiler which shows the assembly generated to correspond with the C code.For a full list of example files and

4、 source code drivers included with the CCS C compiler go hereJump to: Stepper Motor Controller | Seconds Timer | Simple A/D | Example List File | List of Example FilesStepper Motor Controller/                  

5、      EX_STEP.C                                /            

6、                                                  

7、   /  This program interfaces to a stepper motor.  The program will  /  use the RS-232 interface to either control the motor with a    /  analog input, a switch input or by RS-232 command.          &#

8、160;  /                                                

9、                 /  Configure the CCS prototype card as follows:                   /     Connect stepper

10、motor to pins 47-50 (B0-B3)                 /     Conenct 40 to 54 (pushbutton)                    &

11、#160;          /     Connect 9 to 15 (pot)                                &

12、#160;      /     See additional connections below.                           /        (C)

13、Copyright 1996,2001 Custom Computer Services         / This source code may only be used by licensed users of the CCS  / C compiler.  This source code may only be distributed to other  / licensed users of the CCS C compiler.  No other use,&

14、#160;           / reproduction or distribution is permitted without written       / permission.  Derivative programs created using this software    / in object code form are not restricted in any way.

15、              /#include <16c74.h>#fuses HS,NOWDT,NOPROTECT#use delay(clock=20000000)#use rs232(baud=9600, xmit=PIN_C6, rcv=PIN_C7)  / Jumpers: 8 to 11, 7 to 12#include <input.c>#byte port_b = 6#define FOUR_PHASE TRUE#i

16、fdef FOUR_PHASEbyte const POSITIONS4 = 0b0101,                           0b1001,               

17、            0b1010,                           0b0110;#elsebyte const POSITIONS8 = 0b0101,    &#

18、160;                      0b0001,                           0b100

19、1,                           0b1000,                      &#

20、160;    0b1010,                           0b0010,                 

21、0;         0b0110,                           0b0100;#endifdrive_stepper(byte speed, char dir, byte steps)    static byte

22、 stepper_state = 0;   byte i;   for(i=0;i<steps;+i)      delay_ms(speed);     set_tris_b(0xf0);     port_b = POSITIONS stepper_state ;     if(dir!='R')       s

23、tepper_state=(stepper_state+1)&(sizeof(POSITIONS)-1);     else       stepper_state=(stepper_state-1)&(sizeof(POSITIONS)-1);   use_pot()   byte value;  setup_adc(adc_clock_internal);  set_adc_channel( 1 );  printf

24、("rn");  while( TRUE )     value=read_adc();    printf("%2Xr",value);    if(value<0x80)       drive_stepper(value,'R',8);    else if(value>0x80)    

25、60;  drive_stepper(128-(value-128),'F',8);  use_switch(byte speed, char dir)    byte steps;   printf("nrSteps per press: ");   steps = gethex();   while(true)       while(input(PIN_B7) ;   

26、60;  drive_stepper(speed,dir,steps);      while(!input(PIN_B7) ;      delay_ms(100);   main()    byte speed,steps;   char dir;   setup_port_a(RA0_RA1_ANALOG);   while (TRUE)    

27、60;   printf("nrSpeed (hex): ");       speed = gethex();       if(speed=0)          use_pot();       printf("nrDirection (F,R): ");

28、0;      dir=getc()|0x20;       putc(dir);       printf("nrSteps (hex): ");       steps = gethex();       if(steps=0)     

29、;     use_switch(speed,dir);       drive_stepper(speed,dir,steps);   Seconds Timer/                          EX_STW

30、T.C                            /                      &

31、#160;                                        / This program uses the RTCC (timer0) and interrupts to keep

32、 a  / real time seconds counter.  A simple stop watch function is   / then implemented.                                &

33、#160;            /                                      

34、;                         / Configure the CCS prototype card as follows:                  /

35、0;    Insert jumpers from: 11 to 17 and 12 to 18.               /#include <16C84.H>#fuses HS,NOWDT,NOPROTECT#use delay(clock=20000000)#use rs232(baud=9600, xmit=PIN_A3, rcv=PIN_A2)#define INTS_PER_SECOND 76

36、60;    / (20000000/(4*256*256)byte seconds;      / A running seconds counterbyte int_count;    / Number of interrupts left before a   / second has elapsed#int_rtcc          / This function i

37、s called every timeclock_isr()       / the RTCC (timer0) overflows (255->0).                   / For this program this is apx 76 times    if(-int_count=0)   

38、         / per second.      +seconds;      int_count=INTS_PER_SECOND;    main()    byte start;   int_count=INTS_PER_SECOND;   set_rtcc(0);   setup_counters

39、( RTCC_INTERNAL, RTCC_DIV_256);   enable_interrupts(RTCC_ZERO);   enable_interrupts(GLOBAL);   do       printf("Press any key to begin.nr");      getc();      start=seconds;  

40、    printf("Press any key to stop.nr");      getc();      printf("%u seconds.nr",seconds-start);   while (TRUE);Simple A/D/             

41、0;            EX_ADMM.C                              /       

42、0;                                                 

43、0;       /  This program displays the min and max of 30 A/D samples over   /  the RS-232 interface.  The process is repeated forever.        /           &#

44、160;                                                 &#

45、160;   /  Configure the CCS prototype card as follows:                   /      Insert jumpers from: 11 to 17, 12 to 18 and 9 to 16      

46、60; /      Use the #9 POT to vary the voltage.                        /#include <16C71.H>#use delay(clock=15000000)#use rs232(baud=9600,xmit=PIN_A3,rcv=PI

47、N_A2)main()    int i,value,min,max;   printf("Sampling:");   setup_port_a( ALL_ANALOG );   setup_adc( ADC_CLOCK_INTERNAL );   set_adc_channel( 0 );   do       min=255;      max=0;&

48、#160;     for(i=0;i<=30;+i)          delay_ms(100);         value = Read_ADC();         if(value < min)        

49、60;   min=value;         if(value > max)            max=value;            printf("nrMin: %2X  Max: %2Xrn",min,max);   while (TRUE);Output Listing.       min=255;008D:  MOVLW  FF008E:  MOVWF  28.       max=0;0