Doubt in PIC16f1527 UART1 configuration registers

[rparthiban69]

I need PIC16f1527 UART sample program. kindly send the code. Iam using Hitech c compiler.

 

[Ian Rogers]

You'll find it here "C:\Program Files\HI-TECH Software\PICC\9.82\samples\usart"

 

[rparthiban69]

PIC 16f1527 have a two UART ports. Am using UART1 for my application. See my UART program,any problem in UART1 configuration registers?

I need standard (tested) UART program or UART configure register format. FOSC=20MHZ.

Baudrate calculated by using datasheet SPBRG baudrate value(Table22-5) depends upon SYNC,BRGH and BRG16.

How to define 8bit SPBRG and 16bit SPBRG?

#include<pic.h>

__CONFIG(FOSC_HS & WDTE_OFF & PWRTE_ON & MCLRE_OFF & CP_OFF & BOREN_ON & CLKOUTEN_OFF & IESO_ON & FCMEN_ON);  
__CONFIG(WRT_OFF & VCAPEN_OFF & LPBOR_OFF & STVREN_OFF & BORV_HI & LVP_OFF); 

unsigned int flag=0,rx_count=0,count;
bank1 unsigned char a[75]={0};
void send_message(unsigned char const *msg);
void main()
{
			// UART checking
			TRISA=0X3F;
			TRISB=0XFF;
			TRISC=0X80;
			TRISD=0xFF;
			TRISE=0X07;
		
			PORTA=0;
			PORTB=0;
			PORTC=0;
			PORTD=0;
			PORTE=0;
			
			TX1STAbits.BRGH=1;	/* high baud rate */
			SPBRG=520;	/* set the baud rate */

    		BAUD1CONbits.BRG16  = 1;
			BAUD1CONbits.ABDOVF = 0;
			BAUD1CONbits.RCIDL  = 0;  
			BAUD1CONbits.SCKP   = 0; 
			BAUD1CONbits.WUE    = 0;      
			BAUD1CONbits.ABDEN  = 0;

			TX1STAbits.SYNC = 0;   	/* asynchronous */
			TX1STAbits.SENDB = 1;   
			TX1STAbits.CSRC = 0;
			TX1STAbits.TXEN = 1;	/* enable the transmitter */
			TX2STAbits.TXEN = 0;	/* disable the transmitter2 */

			RC1STAbits.SPEN = 1;	/* enable serial port pins */
			RC1STAbits.CREN = 1;	/* enable reception */
			RC1STAbits.SREN = 0;	/* no effect *///
			RC2STAbits.SPEN = 0;	/* disable serial port2 pins */
			RC2STAbits.CREN = 0;	/* disable reception2 */
			
			OSCCONbits.IRCF3=1; //16 MHz Internal osc freq
			OSCCONbits.IRCF2=1;
			OSCCONbits.IRCF1=1;
			OSCCONbits.IRCF0=1;
			OSCCONbits.SCS1=1;
			OSCCONbits.SCS0=0;
			
			INTCONbits.GIE=PEIE=1;
			PIE1bits.RC1IE=1;
			send_message("0x35");
		
						
			while(1)
			{
				//if(flag==1)
				//{
					LATC3=0xFF;
					for(count=0;count<50000;count++);	
					for(count=0;count<50000;count++);	
					for(count=0;count<50000;count++);
					LATC3 =0x00;
					for(count=0;count<50000;count++);
					for(count=0;count<50000;count++);
					for(count=0;count<50000;count++);
				rx_count=0;
				flag=0;	
				send_message("\r\n");
				send_message("UART Receive");
				send_message("\r\n");
				//}
			}
			
}
void send_message(unsigned char const *msg)
	{
		while(*msg!='\0')
		{
			TX1REG=*msg;
			while(!TX1STAbits.TRMT);
			msg++;
		}
	}
void interrupt isr()
{
	 if(PIR1bits.RC1IF==1)
	{
		PIR1bits.RC1IF=0;
		rx_count++;
		if(rx_count>70)
			rx_count=1;
		a[rx_count]=RC1REG;
		
		if(a[rx_count]==0x0d)//Press Enter button
		{
			flag=1;
		}
	}	
	
}

 

[Ian Rogers]

Although the pic has two uarts Using the code will work as the header enumerates the same registers UART and UART1, so the code will be fine..

 

[rparthiban69]

This code is not working in my hardware. how to check uart output? am using serial port monitor?

 

[Ian Rogers]

When I get home tonight ( might be a bit late ) I can simulate this code in ISIS ( I'll have to use a slightly different chip )