Ccs c for pic16F877a mục lục I. Tổng quan về ccs vì sao ta sử dung ccs ?

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9.1.3. check_encoder

#include <16f876a.h>

#include

#FUSES NOWDT, HS, NOPUT, NOPROTECT, NODEBUG, NOBROWNOUT, NOLVP, NOCPD, NOWRT

#use delay(clock=20000000)

#include
#define PWMEn1 TRISC2

#define PWMEn2 TRISC1

#define INTS_PER_SECOND1 19

#define Set_Speed 45

#define Set_duty 1023

#define Direction RC0

int8 int_count1;

int16 current_speed,count;

int16 new_speed,old_speed;

int16 value;

BYTE next_in, buffer[4];

BYTE state;

#int_rtcc // Ngat Timer 0

void Timer0_isr() // Dem so vong quay dong co

{

count++;

}

////////////////////////////////////////////////////////

void DispLine1(int8 pos,int16 POSCNT);

void DispLine2(int8 pos,int16 POSCNT);

Void Init();
void main() {
Init();

// Printf("\n\r Nhap gia tri: ");

delay_ms(5000);

count = 0;

while( TRUE )

{

new_speed = count*255 + get_timer0();

DispLine2(0,new_speed);

}

void init()

{

TRISB = 0x00;

TRISA = 0xFF;

TRISC = 0b10000000;

lcd_init();

lcd_putcmd(0x80);

Printf(lcd_putchar,"Encoder..");

setup_timer_0 (RTCC_DIV_1|RTCC_EXT_L_TO_H); // Timer0 is Counter

set_timer0(0);

enable_interrupts(INT_RTCC);

enable_interrupts(GLOBAL);
delay_ms(500);

setup_ccp1(CCP_PWM); // Configure CCP1 as a PWM

setup_timer_2(T2_DIV_BY_16, 255, 1); //1.2KHz

value=100;

set_pwm1_duty(value);

}
void DispLine1(int8 pos,int16 POSCNT)

{

int8 tram,chuc,donvi;

int32 temp;

temp = ((int32)POSCNT*100)/1023;

tram = temp / 100;

temp = temp % 100;

chuc = temp / 10;

donvi = temp % 10;

lcd_putcmd(0x80 + pos);

if (tram == 0) lcd_putchar(" ");

else lcd_putchar(tram + 0x30);

lcd_putchar(chuc + 0x30);

lcd_putchar(donvi + 0x30);

lcd_putchar("%");

}

void DispLine2(int8 pos,int16 POSCNT)

{

int8 tram,chuc,donvi;

int16 temp;

temp = POSCNT;

// chucnghin = temp / 10000;

// temp = temp % 10000;

// nghin = temp / 1000;

// temp = temp % 1000;

tram = temp / 100;

temp = temp % 100;

chuc = temp / 10;

donvi = temp % 10;

lcd_putcmd(0xC0 + pos);

//lcd_putchar(chucnghin + 0x30);

lcd_putchar(tram + 0x30);

lcd_putchar(chuc + 0x30);

lcd_putchar(donvi + 0x30);

}

// The cycle time will be (1/clock)*4*t2div*(PR2+1)

// In this program clock=20000000 and period=127 (below)

// For the three possible selections the cycle time is:

// (1/20000000)*4*1*256 = 51.2 us or 19.5 khz // 20MHz

// (1/10000000)*4*1*128 = 51.2 us or 19.5 khz // 10MHz

// (1/10000000)*4*4*128 = 204.8 us or 4.9 khz // 10Mhz

// (1/10000000)*4*16*128= 819.2 us or 1.2 khz // 10MHz

// set frequency

// setup_timer_2(T2_DIV_BY_1, 31, 1); //78.12KHz

// setup_timer_2(T2_DIV_BY_1, 46, 1); //208.3KHz

// setup_timer_2(T2_DIV_BY_1, 255, 1); //19.53KHz value = 0..1023

// setup_timer_2(T2_DIV_BY_4, 255, 1); //4.5KHz

// setup_timer_2(T2_DIV_BY_X, PR2, POSTSCALES);

9.2. DK Step Motor

9.2.1. Code

DKMOTOR.h chỉ khai báo config cho 16F876A thôi.đoạn cod cho file nầy

#include <16F876A.h>
#device adc=8
#FUSES NOWDT //No Watch Dog Timer
#FUSES PUT //Power Up Timer
#FUSES NOPROTECT //Code not protected from reading
#FUSES NODEBUG //No Debug mode for ICD
#FUSES BROWNOUT //Reset when brownout detected
#FUSES NOLVP //Low Voltage Programming on B3(PIC16) or B5(PIC18)
#FUSES NOCPD //No EE protection
#FUSES NOWRT //Program memory not write protected
#use delay(clock=20000000)

9.2.2. Step_motor_F877A

#include <16f877a.h>

#include

#device *=16 ADC=8

#FUSES NOWDT, HS, NOPUT, NOPROTECT, NODEBUG, NOBROWNOUT, NOLVP, NOCPD, NOWRT

#use delay(clock=20000000)

#use rs232(baud=9600,parity=N,xmit=PIN_C6,rcv=PIN_C7,bits=9)

//#use i2c(Master,Fast,sda=PIN_C3,scl=PIN_C4)

#include

int1 mode;

int8 duty_cycle,period;
//-----Ngat Ngoai------

#INT_EXT

void ngatngoai()

{

if (mode== 0) mode = 1;

else mode = 0;

}

//--------Ngat Noi Tiep------

#INT_RDA

void ngatrs232()

{

char c;

c = getc();

putc(c);
if (c=='h') duty_cycle++;

else if (c=='l') duty_cycle--;
if (duty_cycle > 20) duty_cycle=20;

if (duty_cycle < 1 ) duty_cycle=1;

}
void main()

{

// Khoi tao cho ngat ngoai + RS232 nhan byte

enable_interrupts (INT_EXT);

enable_interrupts(INT_RDA);

ext_int_edge(H_TO_L);

enable_interrupts (GLOBAL);

// ----------------------------

TRISD = 0;

duty_cycle = 2;

Printf("Chuong trinh dieu khien dong co buoc: ");

Printf(" Nhap chu ky:");

period = 3;

while (1)

{

//Dieu khien dong co buoc: DK nua buoc (ULN2803)

if (mode)

{

PortD = 0x60;

delay_ms(duty_cycle);

PortD = 0x70;

delay_ms(duty_cycle);

PortD = 0x30;

delay_ms(duty_cycle);

PortD = 0xB0;

delay_ms(duty_cycle);

PortD = 0x90;

delay_ms(duty_cycle);

PortD = 0xD0;

delay_ms(duty_cycle);

PortD = 0xC0;

delay_ms(duty_cycle);

PortD = 0xE0;

delay_ms(duty_cycle);

}

else

{

PortD = 0xE0;

delay_ms(duty_cycle);

PortD = 0xC0;

delay_ms(duty_cycle);

PortD = 0xD0;

delay_ms(duty_cycle);

PortD = 0x90;

delay_ms(duty_cycle);

PortD = 0xB0;

delay_ms(duty_cycle);

PortD = 0x30;

delay_ms(duty_cycle);

PortD = 0x70;

delay_ms(duty_cycle);

PortD = 0x60;

delay_ms(duty_cycle);

}

// Dieu khien dong co buoc: DK 1 pha

if (mode)

{

PortD = 0x70;

delay_ms(20-duty_cycle);

PortD = 0xB0;

delay_ms(20-duty_cycle);

PortD = 0xD0;

delay_ms(20-duty_cycle);

PortD = 0xE0;

delay_ms(20-duty_cycle);

}

else

{

PortD = 0xE0;

delay_ms(20-duty_cycle);

PortD = 0xD0;

delay_ms(20-duty_cycle);

PortD = 0xB0;

delay_ms(20-duty_cycle);

PortD = 0x70;

delay_ms(20-duty_cycle);

}

//Dieu khien dong co buoc: DK 2 pha (ULN2803)

if (mode)

{

PortD = 0x60;

delay_ms(period-duty_cycle);

PortD = 0x30;

delay_ms(period-duty_cycle);

PortD = 0x90;

delay_ms(period-duty_cycle);

PortD = 0xC0;

delay_ms(period-duty_cycle);

}

else

{

PortD = 0xC0;

delay_ms(period-duty_cycle);

PortD = 0x90;

delay_ms(period-duty_cycle);

PortD = 0x60;

delay_ms(period-duty_cycle);

PortD = 0x30;

delay_ms(period-duty_cycle);

}

//Dieu khien dong co buoc: DK nua buoc (ULN2803)

if (mode)

{

PortD = 0x60;

delay_ms(period-duty_cycle);

PortD = 0x70;

delay_ms(period-duty_cycle);

PortD = 0x30;

delay_ms(period-duty_cycle);

PortD = 0xB0;

delay_ms(period-duty_cycle);

PortD = 0x90;

delay_ms(period-duty_cycle);

PortD = 0xD0;

delay_ms(period-duty_cycle);

PortD = 0xC0;

delay_ms(period-duty_cycle);

PortD = 0xE0;

delay_ms(period-duty_cycle);

}

else

{

PortD = 0xE0;

delay_ms(period-duty_cycle);

PortD = 0xC0;

delay_ms(period-duty_cycle);

PortD = 0xD0;

delay_ms(period-duty_cycle);

PortD = 0x90;

delay_ms(period-duty_cycle);

PortD = 0xB0;

delay_ms(period-duty_cycle);

PortD = 0x30;

delay_ms(period-duty_cycle);

PortD = 0x70;

delay_ms(period-duty_cycle);

PortD = 0x60;

delay_ms(period-duty_cycle);

}

9.2.3. Chương trình điều khiển động cơ bước .
Bàn phím có 5 phím:quay thuận,quay ngược,quay thuận bước nhỏ,quay ngược bước nhỏ,stop. Trình dịch CCS.Mong các bạn cho ý kiến để cải tiến

#include "C:\Comport\ccs\DKMOTOR.h"

#define stop PIN_C0
#define dkth PIN_C1
#define dkng PIN_C2
#define hpb1 PIN_C3
#define hpb2 PIN_C4
#BYTE trisb =0x86
#BYTE OSCCON=0x8F
#BYTE trisc = 0x87
char a,b ;
char PeekKey() ;
char GetKey();
void buoc1();
void buoc2();
void stp();
void dkthuan();
void dknghich();
void main()
{ //su dung loai 2cuon co chan giua noi B+
setup_adc_ports(NO_ANALOGS);
setup_adc(ADC_OFF);
setup_spi(FALSE);
setup_timer_1(T1_DISABLED);
setup_timer_2(T2_DISABLED,0,1);
setup_comparator(NC_NC_NC_NC);
trisc=7F;
b=2;
while(1)
{
a=PeekKey();
switch(a)
{
case 0 : stp();
break;
case 1 : dkthuan();
break;
case 2 : dknghich();
break;
case 3 : buoc1();
break;
case 4 : buoc2();
break;
case 5 : stp();
break;
}
}
}
//***************
char PeekKey(void)
{ if(input(stop)==0) return(0);
if(input(dkth)==0) return(1);
if(input(dkng)==0) return(2);
if(input(hpb1)==0) return(3);
if(input(hpb2)==0) return(4);
else return (a); }
// **********
char GetKey(void)
{ char nKey;
nKey=PeekKey();
// wait for key release
while ((input(stop)==0)||(input(dkth)==0) )
(input(dkng)==0 )||(input(hpb1)==0 )||(input(hpb2)==0) ;
delay_ms(10);
return(nKey); }
// *************
void dkthuan()
{ output_b(8);
delay_ms(b);
output_b(2);
delay_ms(b);
output_b(1);
delay_ms(b);
output_b(4);
delay_ms(b);
output_b(0);
}
//*******
void dknghich()
{ output_b(4);
delay_ms(b);
output_b(1);
delay_ms(b);
output_b(8);
delay_ms(b);
output_b(2);
delay_ms(b);
output_b(0);
}
// *********
void stp()
{ output_b(0);
delay_ms(2);
}
//*******
void buoc1()
{ char i;
for (i=1;i<=15;++i)
dkthuan();
a=0;
}
//**********
void buoc2()
{ char i;
for (i=1;i<=15;++i)
dknghich();
a=0;
}
// Thanhphuc email thuyphuc81@yahoo.com
// Dieu khien moto buoc loai 2 cuon day co chan giua
9.2.4. Điều khiển động cơ bước

//================================================= =======

// Ten chuong trinh : Thuc hien vao ra

// Nguoi thuc hien : linhnc308

// Ngay thuc hien : 1/09/2006

// Phien ban : 1.0

// Mo ta phan cung : Dung PIC16F877A - thach anh 20MHz

//================================================= =======

#include <16f877a.h>

#include

#device *=16 ADC=10

#FUSES NOWDT, HS, NOPUT, NOPROTECT, NODEBUG, NOBROWNOUT, NOLVP, NOCPD, NOWRT

#use delay(clock=20000000)

#CASE

// Dinh nghia ten cac cong ra

#define Relay1 RD0

#define Relay2 RD1

#define Relay3 RD2

#define Relay4 RD3

#define Relay5 RD4

#define Relay6 RD5

#define Relay7 RD6

#define Relay8 RD7

#define Relay9 RC4

#define Relay10 RC5

#define Relay11 RC6

#define Relay12 RC7
#define IN1 RA0

#define IN2 RA1

#define IN3 RA2

#define IN4 RA3

#define AllRelay1 PORTD // PIN D0 : D7

#define AllRelay2 PORTC // PIN C4 : C7

#define Step PORTD

#Define AllInput PORTA

#define OFF 0

#define ON 1

#define OutEnable1 TRISD // Relay Output

#define OutEnable2 TRISC // Relay Output

#define InEnable TRISA // Input

#define StepEnable TRISD // Step Motor

#define PWM_Enable TRISC2 // PWM, PIN_C2
void main()

{

int8 duty_cycle;

delay_ms(250);

// Khoi tao che do vao ra

OutEnable1 = 0x00;

OutEnable2 = 0x00;

InEnable = 0xFF;

StepEnable = 0x00;

PWM_Enable = 1; // Khong cho phep xuat PWM

//=====================================

// Test Mode

duty_cycle = 1;

while (1)

{

//Dieu khien dong co buoc: DK nua buoc (ULN2803)

if (IN1 == 0)

{

Step = 0x1;

delay_ms(duty_cycle);

Step = 0x3;

delay_ms(duty_cycle);

Step = 0x2;

delay_ms(duty_cycle);

Step = 0x6;

delay_ms(duty_cycle);

Step = 0x4;

delay_ms(duty_cycle);

Step = 0xc;

delay_ms(duty_cycle);

Step = 0x8;

delay_ms(duty_cycle);

Step = 0x9;

delay_ms(duty_cycle);

}

else if (IN2 == 0)

{

Step = 0x9;

delay_ms(duty_cycle);

Step = 0x8;

delay_ms(duty_cycle);

Step = 0xc;

delay_ms(duty_cycle);

Step = 0x4;

delay_ms(duty_cycle);

Step = 0x6;

delay_ms(duty_cycle);

Step = 0x2;

delay_ms(duty_cycle);

Step = 0x3;

delay_ms(duty_cycle);

Step = 0x1;

delay_ms(duty_cycle);

}

else Step = 0x00;

}

// Dieu khien dong co buoc: DK 1 pha

if (mode)

{

Step = 0x70;

delay_ms(20-duty_cycle);

Step = 0xB0;

delay_ms(20-duty_cycle);

Step = 0xD0;

delay_ms(20-duty_cycle);

Step = 0xE0;

delay_ms(20-duty_cycle);

}

else

{

Step = 0xE0;

delay_ms(20-duty_cycle);

Step = 0xD0;

delay_ms(20-duty_cycle);

Step = 0xB0;

delay_ms(20-duty_cycle);

Step = 0x70;

delay_ms(20-duty_cycle);

}

//Dieu khien dong co buoc: DK 2 pha (ULN2803)

if (mode)

{

Step = 0x60;

delay_ms(period-duty_cycle);

Step = 0x30;

delay_ms(period-duty_cycle);

Step = 0x90;

delay_ms(period-duty_cycle);

Step = 0xC0;

delay_ms(period-duty_cycle);

}

else

{

Step = 0xC0;

delay_ms(period-duty_cycle);

Step = 0x90;

delay_ms(period-duty_cycle);

Step = 0x60;

delay_ms(period-duty_cycle);

Step = 0x30;

delay_ms(period-duty_cycle);

}

//Dieu khien dong co buoc: DK nua buoc (ULN2803)

if (mode)

{

Step = 0x60;

delay_ms(period-duty_cycle);

Step = 0x70;

delay_ms(period-duty_cycle);

Step = 0x30;

delay_ms(period-duty_cycle);

Step = 0xB0;

delay_ms(period-duty_cycle);

Step = 0x90;

delay_ms(period-duty_cycle);

Step = 0xD0;

delay_ms(period-duty_cycle);

Step = 0xC0;

delay_ms(period-duty_cycle);

Step = 0xE0;

delay_ms(period-duty_cycle);

}

else

{

Step = 0xE0;

delay_ms(period-duty_cycle);

Step = 0xC0;

delay_ms(period-duty_cycle);

Step = 0xD0;

delay_ms(period-duty_cycle);

Step = 0x90;

delay_ms(period-duty_cycle);

Step = 0xB0;

delay_ms(period-duty_cycle);

Step = 0x30;

delay_ms(period-duty_cycle);

Step = 0x70;

delay_ms(period-duty_cycle);

Step = 0x60;

delay_ms(period-duty_cycle);

}

10. Capture

10.1. Code cho CCS

/////////////////////////////////////////////////////////////////////////

//// EX_CCPMP.C ////

//// ////

//// This program will show how to use the built in CCP to ////

//// measure a pulse width. ////

//// ////

//// Configure the CCS prototype card as follows: ////

//// Connect a pulse generator to pin 3 (C2) and pin 2 (C1) ////

//// See additional connections below. ////

//// ////

//// This example will work with the PCM and PCH compilers. The ////

//// following conditional compilation lines are used to include a ////

//// valid device for each compiler. Change the device, clock and ////

//// RS232 pins for your hardware if needed. ////

/////////////////////////////////////////////////////////////////////////

//// 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, ////

//// reproduction or distribution is permitted without written ////

//// permission. Derivative programs created using this software ////

//// in object code form are not restricted in any way. ////

/////////////////////////////////////////////////////////////////////////

#if defined(__PCM__)

#include <16F88.h>

#fuses HS,NOWDT,NOPROTECT,NOLVP

#use delay(clock=20000000)

#use rs232(baud=9600, xmit=PIN_C6, rcv=PIN_C7) // Jumpers: 8 to 11, 7 to 12
#elif defined(__PCH__)

#include <18F452.h>

#fuses HS,NOWDT,NOPROTECT,NOLVP

#use delay(clock=20000000)

#use rs232(baud=9600, xmit=PIN_C6, rcv=PIN_C7) // Jumpers: 8 to 11, 7 to 12

#endif

long rise,fall,pulse_width;
#int_ccp2

void isr()

{

rise = CCP_1;

fall = CCP_2;
pulse_width = fall - rise; // CCP_1 is the time the pulse went high

} // CCP_2 is the time the pulse went low

// pulse_width/(clock/4) is the time
// In order for this to work the ISR

// overhead must be less than the

// low time. For this program the

// overhead is 45 instructions. The

// low time must then be at least

// 9 us.
void main()

{

printf("\n\rHigh time (sampled every second):\n\r");

setup_ccp1(CCP_CAPTURE_RE); // Configure CCP1 to capture rise

setup_ccp2(CCP_CAPTURE_FE); // Configure CCP2 to capture fall

setup_timer_1(T1_INTERNAL); // Start timer 1
enable_interrupts(INT_CCP2); // Setup interrupt on falling edge

enable_interrupts(GLOBAL);

while(TRUE) {

delay_ms(1000);

printf("\r%lu us ", pulse_width/5 );

}

10.2. Sử dụng capture newcode

#include <16F877A.h>

#use delay(clock=4000000)

#fuses HS,NOWDT, NOPROTECT

#use rs232(baud=4800,xmit=PIN_C6,rcv=PIN_C7)
#bit TMR1IF 0x0C.0
int16 CCP1Value;

int16 CCP1OldValue;

BOOLEAN CCP1Captured;
#int_CCP1

CCP1_isr()

{

if(TMR1IF)

{

CCP1Value = CCP_1 +(65535-CCP1OldValue);

CCP1OldValue = CCP_1;

TMR1IF=0;

}

else

{

CCP1Value = CCP_1 - CCP1OldValue;

CCP1OldValue = CCP_1;

}

CCP1Captured = TRUE;

}

//--------------------------------------------------------------------------

void Init_ccp(void)

{

setup_ccp1(CCP_CAPTURE_RE);

setup_timer_1(T1_INTERNAL|T1_DIV_BY_8);

CCP1Value = 0;

CCP1OldValue = 0;

CCP1Captured = TRUE;

enable_interrupts(INT_CCP1);

enable_interrupts(GLOBAL);

}

//--------------------------------------------------------------------------

void main()

{

float Freq;

Init_ccp();

printf("Frequence test:\r\n");

while (TRUE) {
if (CCP1Captured) {
// F = 1/T

// Timer1 prescaler DIV_BY_8

// Pic16F877A 4MHz -> 0.000001 * 8 = 1uS * 8

// PIC16f877a 20MHz -> 200nS * 8

Freq = 1.0/((float)CCP1Value*8e-6);

printf("Freq:%f\r\n",Freq);

CCP1Captured = FALSE;

}

}

10.3. Capture_LCD_5MHz

#include <16F877A.h>

#include

#use delay(clock=20000000)

#FUSES NOWDT, HS, NOPUT, NOPROTECT, NODEBUG, NOBROWNOUT, NOLVP, NOCPD, NOWRT

#use rs232(baud=9600,parity=N,xmit=PIN_C6,rcv=PIN_C7,bits=9)

#bit TMR1IF = 0x0C.0
#include
int16 CCP1Value; // Gia tri CCP hien tai

int16 CCP1OldValue; // Gia tri CCP truoc do

BOOLEAN CCP1Captured;

float Freq;

int8 char1,char2,char3,char4,char5,char6,mode;

int8 count,count1,count2,count3;

#int_CCP1

CCP1_isr()

{

if(TMR1IF)

{

CCP1Value = CCP_1 +(65535-CCP1OldValue);

CCP1OldValue = CCP_1;

TMR1IF=0;

}

else

{

CCP1Value = CCP_1 - CCP1OldValue;

CCP1OldValue = CCP_1;

}

CCP1Captured = TRUE;

}

//--------------------------------------------------------------------------

#INT_TIMER0

Timer0_isr()

{

}

//----------------------------------------

void Init_ccp(void)

{

setup_ccp1(CCP_CAPTURE_RE);

setup_timer_0(RTCC_EXT_L_TO_H|RTCC_DIV_64);

setup_timer_1(T1_INTERNAL|T1_DIV_BY_8);

set_timer0(0);

CCP1Value = 0;

CCP1OldValue = 0;

CCP1Captured = TRUE;

enable_interrupts(INT_CCP1);

//enable_interrupts(INT_TIMER1);

enable_interrupts(GLOBAL);

}

//--------------------------------------------------------------------------

void Convert_CCP1()

{

int32 temp;

//Freq = (1.0/((float)CCP1Value*2e-7)); // For Time_Div_1

Freq = (1.0/((float)CCP1Value*16e-7)); //For_Time_Div_8

if (Freq >= 1000 )

{

mode = 1;

temp = freq;

char1 = (temp / 100000) + 0x30;

temp = temp % 100000;

char2 = (temp / 10000) + 0x30;

temp = (temp % 10000);

char3 = (temp / 1000) + 0x30;

temp = (temp % 1000);

char4 = (temp / 100) + 0x30;

temp = temp % 100;

char5= (temp/10 ) + 0x30;

char6 = (temp % 10) + 0x30;

goto exit;

}

else

if (Freq >= 1000000 )

{

mode = 2;

temp = freq;

char1 = (temp / 100000) + 0x30;

temp = temp % 100000;

char2 = (temp / 10000) + 0x30;

temp = (temp % 10000);

char3 = (temp / 1000) + 0x30;

temp = (temp % 1000);

char4 = (temp / 100) + 0x30;

temp = temp % 100;

char5= (temp/10 ) + 0x30;

char6 = (temp % 10) + 0x30;

goto exit;

}

else

{

mode = 0;

temp = (int32)(freq * 1000);

char1 = (temp / 100000) + 0x30;

temp = temp % 100000;

char2 = (temp / 10000) + 0x30;

temp = (temp % 10000);

char3 = (temp / 1000) + 0x30;

temp = (temp % 1000);

char4 = (temp / 100) + 0x30;

temp = temp % 100;

char5= (temp/10 ) + 0x30;

char6 = (temp % 10) + 0x30;

goto exit;

}

exit:

temp = 0;

}

//--------------------------------------------

void convert_timer0_value()

{

count = get_timer0();

count1 = count/100 + 0x30;

count = count%100;

count2 = count/10 + 0x30;

count3 = count%10 + 0x30;

}

//---------------------------------------------------------------

void main()

{

TRISB = 0; // F = 1/T

Init_ccp(); // Timer1 prescaler DIV_BY_1

LCD_init(); // PIC16f877a 20MHz -> 0.0000002 = 200nS

//printf("Frequence test:\r\n"); // Pic16F877A 4MHz -> 0.000001 = 1uS

LCD_putcmd(0xC0);

Printf(LCD_putchar,"Counter = ");

LCD_putcmd(0x80);

Printf(LCD_putchar,"Freq = ");

while (TRUE)

{

if (CCP1Captured)

{

Convert_CCP1();

LCD_putcmd(0x87);

if (char1 != 0x30) LCD_putchar(char1);

if (((char1 != 0x30) && (char2 == 0x30)) || (char2 != 0))

LCD_putchar(char2);

LCD_putchar(char3);

LCD_putchar(".");

LCD_putchar(char4);

LCD_putchar(char5);

switch (mode)

{

case 0: {LCD_putchar(char6);lcd_putcmd(0x8F);Printf(LCD_putchar," Hz");} break;

case 1: {LCD_putchar(char6);lcd_putcmd(0x8F);Printf(LCD_putchar,"KHz");} break;

case 2: {LCD_putchar(char6);lcd_putcmd(0x8F);Printf(LCD_putchar,"MHz");} break;

}

printf("Freq:%f\r\n",Freq);

CCP1Captured = FALSE;

}

convert_timer0_value();

LCD_putcmd(0xCa);

LCD_putchar(count1);

LCD_putchar(count2);

LCD_putchar(count3);

}

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