 |
 |
| View previous topic :: View next topic |
| Author |
Message |
carlosma
Joined: 24 Mar 2004
Posts: 53
Location: Portugal
|
| two serial ports and two interrupts by fgetc() |
 Posted: Fri Jun 25, 2004 11:19 am |
 |
|
Hello
I have this problem.
For comunication betwen a PC and a mobil Modem I need two serial ports, for receive data of PC or Modem.
The hardware port work fine, but the software ports don't work, when use the fgetc(PORT_B).
How can i resolve this?
the interrupt:
| Code: |
#int_rda
void seirala_isr()
{
boolean Ea, Eb;
Ea=kbhit(COM_A);
Eb=kbhit(COM_B);
if (Ea)
{
cmd=fgetc(COM_A);
cmd=toupper(cmd);
fputc(cmd, COM_A);
Ea=0;
}
if (Eb)
{
dado_b=fgetc(COM_B);
dado_b=toupper(dado_b);
fputc(dado_b, COM_B);
Eb=0;
}
|
Carlos |
|
 |
Darren Rook
Joined: 06 Sep 2003
Posts: 287
Location: Milwaukee, WI
|
|
| Posted: Fri Jun 25, 2004 11:49 am |
|
|
| You can't use #int_rda for software serial, only hardware. Move your software serial RX to B0, B4-B7 or the CCP and you can use #int_ext, #int_rb or #int_ccp respectively. |
|
|
carlosma
Joined: 24 Mar 2004
Posts: 53
Location: Portugal
|
|
| Posted: Mon Jun 28, 2004 4:51 am |
|
|
Ok I change to RB0 but now I have a error caracter when fputc()
I have now the program:
| Code: |
#include <16F877.h>
#fuses HS,NOPROTECT,NOWDT,NOLVP,PUT,NOBROWNOUT
#use delay(clock=16000000)
#use rs232(baud=9600, xmit=PIN_C6, rcv=PIN_C7, STREAM=COM_A)
#USE RS232(BAUD=9600, XMIT=PIN_B1, RCV=PIN_B0, STREAM=COM_B)
#int_ext //interrupt for sotftware COM_B USART port
void vira()
{
dado_b=fgetc(COM_B);
dado_b=toupper(dado_b);
fputc(dado_b,COM_B);
}
#int_rda //interrupt for hardware COM_A USART port
void seirala_isr()
{
cmd=fgetc(COM_A);
cmd=toupper(cmd);
fputc(cmd, COM_A);
}
#int_timer0 //interrupt for real time clock
timer0_isr()
{
clock-=256; // 256 > dois elevado a 8
if(clock<256)
{
clock+=CLOCK_VAL;
tick=1;
seconds++;
}
}
void init_chip()
{
setup_adc_ports(No_Analogs);
setup_timer_0(RTCC_INTERNAL | RTCC_DIV_32);
enable_interrupts(int_timer0); // Enable timer0 interrupt
enable_interrupts(INT_RDA);
enable_interrupts(int_ext);
enable_interrupts(GLOBAL);
}
//...
void main()
{
static boolean led2;
init_ext_eeprom();
init_chip();
fprintf(COM_A,"\r\nRead or Write: ");
while(1)
{
if (tick) // real time clock 1 second
{
tick=0;
update_clock();
led2 = !led2; // led flash 1 second
output_bit (pin_c0,led2);
}
if(dado_b=='A')
fprintf(COM_A,"Tunga........->");
if(cmd=='R')
{
//...
read_eeprom_string(s, ROM_SMTP, ROM_SMTP_SIZE);
fprintf(COM_B,"AT#ESMTP=\"%s\"\r\n",s);
//...
}
|
[/quote] |
|
|
steve.booth
Joined: 18 Oct 2004
Posts: 7
|
|
| Posted: Fri Feb 11, 2005 2:18 am |
|
|
I would suggest that you don't use fputc within your interrupt routines.
ISR's should be kept as short as possible, and a 'put' take a comparable long time to execute.
Use the interrupt routine to set a flag and then detect the flag in your MAIN.
_________________
Steve |
|
|
Mark
Joined: 07 Sep 2003
Posts: 2838
Location: Atlanta, GA
|
|
| Posted: Fri Feb 11, 2005 7:10 am |
|
|
| You do realize that you are respoding to a post from June of last year! |
|
|
|
|
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
|
Powered by phpBB © 2001, 2005 phpBB Group
|
FAQ 
Search
Register
Profile 
Log in to check your private messages 
Log in
