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serial port PLEASE HELP |
Posted: Mon Mar 08, 2004 11:08 am |
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Hello,
I'm trying to do a simple test on the serial port using a pic18F6520. I'm using windows hyperterminal and I'm not getting anything coming through. Can someone please tell me what I'm doing wrong? This is my code:
/***********************************************************/
#include <18F6520.h>
#use delay(clock = 40000000)
#use rs232(baud=9600, xmit=PIN_G1, rcv=PIN_G2) //set up SERIAL PORT on USART2
#fuses XT,NOWDT,PUT,NOBROWNOUT,NOLVP
#BYTE PORTA = 0XF80 //PORTA - PIC18F6520
#BYTE PORTB = 0xF81 //PORTB - PIC18F6520
#BYTE PORTC = 0xF82 //PORTC - PIC18F6520
#BYTE PORTD = 0xF83 //PORTD - PIC18F6520
#BYTE PORTE = 0xF84 //PORTE - PIC18F6520
#BYTE PORTF = 0xF85 //PORTF - PIC18F6520
#BYTE PORTG = 0xF86 //PORTG - PIC18F6520
#BYTE TRISG = 0xF98 //TRISG - PIC18F6520
#BYTE PIE2 = 0xFA0 //Peripheral interrupt enable reg.
#BYTE RCSTA1 = 0xFAB //Receive status control register for USART1
#BYTE TXSTA1 = 0xFAC //Transmit status control register for USART1
#BYTE RCSTA2 = 0xF6B //Receive status control register for USART2
#BYTE TXSTA2 = 0xF6C //Transmit status control register for USART2
#BYTE TXREG2 = 0xF6D //Transmit buffer register for USART2
#BYTE SPBRG2 = 0xF6F //Baud rate generator for USART2
#BYTE BAUDCON2 = 0xF7C //Baud rate control register for USART2
//Serial Port definitions
#bit TXIE = PIE2.4 //transmit interrupt enable bit
#bit RCIE = PIE2.5 //receive interrupt enable bit
#bit TX9 = TXSTA2.6 //9-bit transmit enable bit
#bit TXEN = TXSTA2.5 //transmit enable bit
#bit SYNC = TXSTA2.4 //synchronous mode
#bit TRMT = TXSTA2.1 //TSR status bit
#bit SPEN = RCSTA2.7 //serial port enable pin
#bit RX9 = RCSTA2.6 //9-bit reception enable bit
#bit CREN = RCSTA2.1 //reception enable bit
#bit BRGH2 = TXSTA2.2 //baude rate generator high bit enable
#bit BRG16 = BAUDCON2.3 //16-bit transfer mode enable bit
void main(){
/*----------configure all the ports-------*/
PORTA = 0;
PORTB = 0;
PORTC = 0;
PORTD = 0;
PORTE = 0;
PORTF = 0;
PORTG = 0;
BRGH2 =0; // low baude rate
BRG16 =0; // 8-bit transfer mode
SPBRG2 = 64; // 9600 bit/s at 40MHz clock speed
SYNC = 0; // ASYNCHRONOUS MODE
SPEN = 1; // ENABLE SERIAL PORT PINS
CREN = 1; // ENABLE RECEPTION
TXIE = 0; // DISABLE TRANSMIT INTERRUPTS
RCIE = 0; // DISABLE RECEIVE INTERRUPTS
TX9 = 0; // 8-BIT TRANSMIT MODE
RX9 = 0; // 8-BIT RECEIVE MODE
TXEN = 0; // RESET TRANSMITTER
TXEN = 1; // ENABLE TRANSMITTER
bit_set(TRISG,2);
BIT_CLEAR(TRISG,1);
#asm
clrwdt
#endasm
/*-----------set PIC registers------------*/
delay_ms(10);
printf("Hello World\r");
delay_ms(500);
printf("Goodbye World\r");
}//end main
/**********************************************************/
Thanks,
Emily |
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Neutone
Joined: 08 Sep 2003 Posts: 839 Location: Houston
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Posted: Mon Mar 08, 2004 11:25 am |
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#use delay(clock = 40000000)
#use rs232(baud=9600, xmit=PIN_G1, rcv=PIN_G2) //set up SERIAL PORT on USART2
#fuses XT,NOWDT,PUT,NOBROWNOUT,NOLVP
Do you really have 40Mhz and the fuse set to XP? |
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mle
Joined: 12 Sep 2003 Posts: 10
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Posted: Mon Mar 08, 2004 11:39 am |
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NO! That should have been HS.
Thanks you so much!
Emily |
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