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dspic interrupt uart

 
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dnatechnical



Joined: 26 Nov 2009
Posts: 19

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dspic interrupt uart
PostPosted: Mon Jan 11, 2010 2:31 am     Reply with quote

any one have c code for dspic uart interrupt?
dnatechnical



Joined: 26 Nov 2009
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PostPosted: Mon Jan 11, 2010 5:20 am     Reply with quote

need help please

Last edited by dnatechnical on Mon Jan 11, 2010 1:28 pm; edited 1 time in total
dnatechnical



Joined: 26 Nov 2009
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PostPosted: Mon Jan 11, 2010 5:23 am     Reply with quote

Code:


#include <30F6010A.h>

#FUSES NOWDT                    //No Watch Dog Timer
#FUSES HS                       //High speed Osc (> 4mhz for PCM/PCH) (>10mhz for PCD)
#FUSES PR                       //Primary Oscillator
#FUSES NOCKSFSM                 //Clock Switching is disabled, fail Safe clock monitor is disabled
#FUSES WPSB16                   //Watch Dog Timer PreScalar B 1:16
#FUSES WPSA512                  //Watch Dog Timer PreScalar A 1:512
#FUSES PUT64                    //Power On Reset Timer value 64ms
#FUSES NOBROWNOUT               //No brownout reset
#FUSES BORV47                   //Brownout reset at 4.7V
#FUSES LPOL_HIGH                //Low-Side Transistors Polarity is Active-High (PWM 0,2,4 and 6)
   //PWM module low side output pins have active high output polar
#FUSES HPOL_HIGH                //High-Side Transistors Polarity is Active-High (PWM 1,3,5 and 7)
   //PWM module high side output pins have active high output polarity
#FUSES NOPWMPIN                 //PWM outputs drive active state upon Reset
#FUSES MCLR                     //Master Clear pin enabled
#FUSES NOPROTECT                //Code not protected from reading
#FUSES NOWRT                    //Program memory not write protected
#FUSES NODEBUG                  //No Debug mode for ICD
#FUSES NOCOE                    //Device will reset into operational mode
#FUSES ICSP1                    //ICD uses PGC1/PGD1 pins
#FUSES RESERVED                 //Used to set the reserved FUSE bits

#use delay(clock=12000000)
#include <stdio.h>
#use rs232(UART1,baud=9600,parity=E,bits=8,errors)


char c;
#int_RDA
void  RDA_isr(void)
{   
   c=fgetc();
   clear_interrupt(int_RDA);
}

void main()
{
   setup_spi(SPI_SS_DISABLED);
   setup_spi2(SPI_SS_DISABLED);


   setup_wdt(WDT_Off);
 

   enable_interrupts(INT_RDA);
    // TODO: USER CODE!!

loop:

   delay_ms(200);
   goto loop;
}


receive interrupt is not generated
FvM



Joined: 27 Aug 2008
Posts: 2337
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PostPosted: Tue Jan 12, 2010 1:26 am     Reply with quote

How do you determine, that no interrupt is generated? There's no interrupt action in your code, except reading the data.

clear_interrupt(int_RDA) is not required. setup_spi(SPI_SS_DISABLED) and setup_spi2(SPI_SS_DISABLED)
are enabling the SPI interfaces, apparently unintended.

But the UART1 RX interrupt should work anyway, I think.
dnatechnical



Joined: 26 Nov 2009
Posts: 19

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PostPosted: Tue Jan 12, 2010 12:35 pm     Reply with quote

I'm using debugger(pickit 3) to check it.
I set break point at clear interrupt, so I can check data.
I'm sending data through com port via max232.

There no change in flag bit or U1RXREG.

Yes I know setup_spi(SPI_SS_DISABLED) and setup_spi2(SPI_SS_DISABLED)
are enabling the SPI interfaces, apparently unintended.

But I use ccs project wizard. Its generated by it, so I keep it as it is.
bkamen



Joined: 07 Jan 2004
Posts: 1611
Location: Central Illinois, USA

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PostPosted: Wed Jan 13, 2010 12:22 am     Reply with quote

Weird.

Every time I see a goto in C my brain goes "arf??"

Is it just me?

I know it's legal, but it just seems so BASIC. :P

-Ben
_________________
Dazed and confused? I don't think so. Just "plain lost" will do. :D
FvM



Joined: 27 Aug 2008
Posts: 2337
Location: Germany

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PostPosted: Wed Jan 13, 2010 12:36 am     Reply with quote

Quote:
But I use ccs project wizard. Its generated by it, so I keep it as it is.
Thank's for clarifying, I never use the project wizard. I finally understood, where these rubish statements come frome.

Quote:
There no change in flag bit or U1RXREG.

Sounds like no data ever arrives at the UART.
dnatechnical



Joined: 26 Nov 2009
Posts: 19

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PostPosted: Wed Jan 13, 2010 10:40 am     Reply with quote

Right. There is no data receive from uart.
Even if I check data through serial port monitor at end of dspic rx pin
I receive some data but interrupt is not generated.
Anyone have idea ?

thanks
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