PWM from PIC16F877a....

#include <htc.h>
#include <stdlib.h>
__CONFIG(LVP_OFF & BOREN_OFF & PWRTE_ON & WDTE_OFF & FOSC_HS);
#define _XTAL_FREQ 20000000
 
unsigned char inbuff[12];					// Transmision buffer
void  HSerinit(void), HserinString(unsigned char*);
unsigned char Hserin(void);					// transmission functions
int getInt(unsigned char* str);			// a sort of atoi
 
void main()
	{
	int rxdata;				// incomming data store
	PR2 = 0b11111001 ;
	T2CON = 0b00000100 ;   
	CCP1CON = 0b00111100;                  
	ADCON1 = 0x6;                 
	HSerinit();  
	while(1)
		{
		HserinString(inbuff);		// get incomming data
		rxdata = getInt(inbuff);	// turn to decimal
   		CCPR1L = (unsigned char)rxdata ;// set PWM
		}
	}

void HserinString(unsigned char* str)
	{
	int i = 0;
	while(str[i++] != 0x0D)	// wait for carriage return
		str[i] = Hserin();	// get next character
	
	}

int getInt(unsigned char* str) // sort of atoi
	{
	int result = 0;
	while(*str !=0x0D)		// until we see carriage return
		{
		if(*str >0x29 && *str < 0x3A)	// Is it a number
			{
			result*=10;
			result+= *str - 0x30;		// convert to int
			}
		str++;
		}
	return result;		// all done
	}

unsigned char Hserin(void)
	{
	while(!RCIF);
	return RCREG;	
	}

void HSerinit()
	{
    TRISC = 0x80;                    // TX was an input!
    SPBRG = 129;                    // 20Mhz xtal 9600 BAUD
    TXSTA = 0x24;                    // TXEN and BRGH
    RCSTA = 0x90;                    // SPEN and CREN
	}

#include <htc.h>
#include	<stdio.h>
__CONFIG(LVP_OFF & BOREN_OFF & PWRTE_ON & WDTE_OFF & FOSC_HS);
#define _XTAL_FREQ 20000000
 
unsigned char outbuff[12];
void  HSerinit(void), HseroutString(unsigned char* str), Hserout(unsigned char ch);
int getADC(void);
 
void main(void)                        
    { 
	int txdata;		// data to transmit
	TRISA = 0xff ;                             
    HSerinit();
	__delay_ms(150);
    while(1)                
        {
		txdata = getADC();				// get analogue value on RA0
		sprintf(outbuff,"%d\r",txdata);	// convert to ascii text
		HseroutString(outbuff);			// send data
	    }
	}

void HseroutString(unsigned char* str)
	{
	while(*str != 0)			// while all transmitted
		Hserout(*str++);	
	}

void Hserout(unsigned char ch)
	{
	while(!TXIF);
	TXREG = ch;	
	}

int getADC()
	{
	ADCON1=0b00000000;
	ADCON0=0b10000001;	//000 = channel 0, (RA0/AN0)
	__delay_ms(10);
    GO_DONE=1;
	__delay_ms(10);
    while(GO_DONE);                 
	return ADRESH;              
	}

void HSerinit()
	{
    TRISC = 0x80;                    // TX was an input!
    SPBRG = 129;                    // 20Mhz xtal 9600 BAUD
    TXSTA = 0x24;                    // TXEN and BRGH
    RCSTA = 0x90;                    // SPEN and CREN
	}

void HserinString(unsigned char* str)
	{
	int i = 0;
	while(str[i++] != 0x0D)	// wait for carriage return
		str[i] = Hserin();	// get next character
 
	}
 
int getInt(unsigned char* str) // sort of atoi
	{
	int result = 0;
	while(*str !=0x0D)		// until we see carriage return
		{
		if(*str >0x29 && *str < 0x3A)	// Is it a number
			{
			result*=10;
			result+= *str - 0x30;		// convert to int
			}
		str++;
		}
	return result;		// all done
	}