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RX interrupt of PIC18F46k22 is not working.

 
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hwryu



Joined: 25 Sep 2013
Posts: 18

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RX interrupt of PIC18F46k22 is not working.
PostPosted: Wed Sep 25, 2013 5:41 pm     Reply with quote
I took 4 days to fix the problem of PIC UART. I am using PIC18f46k22.
when sending character to PC via TX , PC received character well.
But when sending character to PIC via TX, RX interrupt is not working.
I used rx interrupt with PIC16f877 before. Is different how to use rx interrupt in both of these PICs.
Help me . I am tired.

Code:
 
#include <18F46K22.h>
#device *=16 adc=10


#device ICD=TRUE
#FUSES NOWDT //No Watch Dog Timer
#FUSES WDT128 //Watch Dog Timer uses 1:128 Postscale
//#FUSES HS //High speed Osc (> 4mhz for PCM/PCH) (>10mhz for PCD)
#FUSES H4 //High speed osc with HW enabled 4X PLL
#FUSES NOPROTECT //Code not protected from reading
#FUSES NOBROWNOUT //Reset when brownout detected
#FUSES BORV42 //Brownout reset at 4.2V
#FUSES PUT //Power Up Timer
#FUSES NOCPD //No EE protection
#FUSES STVREN //Stack full/underflow will cause reset
#FUSES DEBUG //Debug mode for use with ICD
#FUSES NOLVP //No low voltage prgming, B3(PIC16) or B5(PIC18) used for I/O
#FUSES NOWRT //Program memory not write protected
#FUSES NOWRTD //Data EEPROM not write protected
#FUSES NOIESO //Internal External Switch Over mode disabled
#FUSES NOFCMEN //Fail-safe clock monitor disabled
#FUSES NOPBADEN //PORTB pins are configured as digital I/O on RESET
#FUSES NOWRTC //configuration not registers write protected
#FUSES NOWRTB //Boot block not write protected
#FUSES NOEBTR //Memory not protected from table reads
#FUSES NOEBTRB //Boot block not protected from table reads
#FUSES NOCPB //No Boot Block code protection
#FUSES LPT1OSC //Timer1 configured for low-power operation
#FUSES MCLR //Master Clear pin enabled
#FUSES NOXINST //Extended set extension and Indexed Addressing mode disabled (Legacy mode)
#FUSES NOHFOFST //High Frequency INTRC waits until stable before clocking CPU



#use delay(internal=16Mhz,clock=64Mhz,RESTART_WDT,clock_out)
#use rs232(UART1,baud=19200,stop=1,parity=N,xmit=PIN_C6,rcv=PIN_C7,bits=8,restart_WDT,errors,stream=SER1)

#ZERO_RAM

#include <stdio.h>



#use fast_io(a)
#use fast_io(b)
#use fast_io(c)

#priority RDA,EXT



int32 gtemp1=1234567;
long int Delay_time=1000;
int Serial_1=0;
int Serial_2=0;
int RxFlag=0;
char RecvChar=null;



#int_rda
void rda_isr(void)
{
RecvChar = getc();
Delay_time = 100;
RxFlag = 1;

}


#int_ext
Void ext_isr(){

if(Delay_time==100)
Delay_time=1000;
else
Delay_time=100;
}


void main()
{
SET_TRIS_A(0b00000000);
SET_TRIS_B(0b10000001);
SET_TRIS_C(0b10000000);

Port_B_Pullups(TRUE);


ext_int_edge(0, L_to_H);

disable_interrupts(INT_TIMER0);
disable_interrupts(INT_TIMER1);
disable_interrupts(INT_TIMER2);
disable_interrupts(INT_TIMER3);
disable_interrupts(INT_EXT1);
disable_interrupts(INT_EXT2);
disable_interrupts(INT_RB);
disable_interrupts(INT_AD);
disable_interrupts(INT_TBE);
disable_interrupts(INT_RDA2);
disable_interrupts(INT_TBE2);
disable_interrupts(INT_CCP1);
disable_interrupts(INT_CCP2);
disable_interrupts(INT_EEPROM);

enable_interrupts(INT_EXT);
enable_interrupts(INT_RDA);
enable_interrupts(GLOBAL);



while(true){

delay_ms(500);
gtemp1+=1;
// fprintf(SER1,"UART1A4=%d \r\n", input_state(TESTA4));
// fprintf(SER1,"UART1B0=%d \r\n", input_state(TESTB0));
fprintf(SER1,"UART1=%lu \r\n", gtemp1);
fputs("----------------",SER1);

if(RxFlag==1)
{
fprintf(SER1,"%c \r\n",RecvChar);
RxFlag   = 0;
}



output_bit(pin_b1,1);
// led=0b000000010;
delay_ms(Delay_time);   
output_bit(pin_b1,0);
//   led=0b00000000;
delay_ms(Delay_time);   

//    Delay_time +=50;
}
}


Sad Sad
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Wed Sep 25, 2013 7:52 pm     Reply with quote
What's your compiler version ? Always post it.
hwryu



Joined: 25 Sep 2013
Posts: 18

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PostPosted: Wed Sep 25, 2013 9:24 pm     Reply with quote
PCM programmer wrote:
What's your compiler version ? Always post it.


my compiler'version is 4.108
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Wed Sep 25, 2013 10:55 pm     Reply with quote
See the fix shown at the end of this thread:
http://www.ccsinfo.com/forum/viewtopic.php?t=43961
hwryu



Joined: 25 Sep 2013
Posts: 18

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PostPosted: Wed Sep 25, 2013 11:46 pm     Reply with quote
PCM programmer wrote:
See the fix shown at the end of this thread:
http://www.ccsinfo.com/forum/viewtopic.php?t=43961


After following your advice, Rx interrupt is working well.

Thank you for your help. I am happy
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