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nicotec
Joined: 07 Nov 2008
Posts: 60
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| #int_rda with pic24fj16ga002 |
 Posted: Mon Jan 26, 2009 9:06 am |
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Can anyone please help me about receive serial data interrupt not working? Led on pin B7 is alway off when I send data on serial port.
Thanks, bye
| Code: |
#include <24FJ16GA002.h>
#include <string.h>
#FUSES NOWDT //No Watch Dog Timer
#FUSES NOJTAG //JTAG disabled
#FUSES NOPROTECT //Code not protected from reading
#FUSES NOWRT //Program memory not write protected
#FUSES NODEBUG //No Debug mode for ICD
#FUSES ICS3 //ICD communication channel 3
#FUSES IOL1WAY //Allows only one reconfiguration of peripheral pins
#FUSES WINDIS //Watch Dog Timer in non-Window mode
#FUSES WPRES128 //Watch Dog Timer PreScalar 1:128
#FUSES WPOSTS16 //Watch Dog Timer PostScalar 1:32768
#FUSES IESO //Internal External Switch Over mode enabled
#FUSES FRC //Internal Fast RC Oscillator
#FUSES NOCKSFSM //Clock Switching is disabled, fail Safe clock monitor is disabled
#FUSES NOOSCIO //OSC2 is general purpose output
#FUSES NOPR //Pimary oscillaotr disabled
#FUSES I2C1SELD
#use delay(clock=8000000)
#pin_select OC1=PIN_B0 //OUTPUT OF PWM PIN 4
#pin_select OC2=PIN_B1 //OUTPUT OF PWM PIN 5
#pin_select U1TX=PIN_B10 //RS-232 TX PIN 21
#pin_select U1RX=PIN_B11 //RS-232 RX PIN 22
#use rs232(UART1,baud=57600,parity=N,bits=8,stop=1)
#int_RDA
void RDA_isr(void)
{
output_high(PIN_B7);
}
void main()
{
long an_1;
long an_2;
long an_3;
int cmd;
int val;
char rec_str[30];
char rif_int;
char rif_fin;
setup_spi(SPI_SS_DISABLED);
setup_spi2(SPI_SS_DISABLED);
setup_wdt(WDT_ON);
setup_timer1(TMR_DISABLED|TMR_DIV_BY_1);
enable_interrupts(INT_RDA);
enable_interrupts(intr_global);
setup_timer2(TMR_INTERNAL | TMR_DIV_BY_8,10000 );
setup_compare(1,COMPARE_PWM | COMPARE_TIMER2 );
setup_compare(2,COMPARE_PWM | COMPARE_TIMER2 );
setup_adc_ports( sAN9 | sAN10 | sAN11 );
setup_adc(ADC_CLOCK_INTERNAL );
set_pwm_duty(1,1000); // 2ms on status
set_pwm_duty(2,1000); // 2ms on status
rif_int=",";
rif_fin="%c%c",10,13;
output_low(PIN_B8); //common pin for led
output_low(PIN_B6); //led off
output_low(PIN_B7); //led off
do
{
set_adc_channel( 9 );
an_1 = read_adc();
set_adc_channel( 10 );
an_2 = read_adc();
set_adc_channel( 11 );
an_3 = read_adc();
output_high(PIN_B6);
printf("%Lu%c%Lu%c%Lu%c%c",an_1,10,an_2,10,an_3,10,13);
delay_ms(250);
//rec_str="3,";
//cmd=strtok(rec_str,rif_int);
//val=strtok(null,rif_fin);
} while(true);
} |
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dyeatman
Joined: 06 Sep 2003
Posts: 1934
Location: Norman, OK
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| Posted: Mon Jan 26, 2009 9:33 am |
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Move the space after the interrupt (#int_RDA) declaration to the line above
it as shown.
If you do not perform a read of the UART registers the interrupt will not
be cleared. You need to also add a getc() line as illustrated.
| Code: | #pin_select U1RX=PIN_B11 //RS-232 RX PIN 22
#use rs232(UART1,baud=57600,parity=N,bits=8,stop=1)
#int_RDA
void RDA_isr(void)
{
xx=getc(); <=== add a line similar to this
output_high(PIN_B7);
}
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nicotec
Joined: 07 Nov 2008
Posts: 60
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| to try |
| Posted: Mon Jan 26, 2009 1:51 pm |
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thanks, I'll try tomorrow morning (Italy) and I'll post here my results; please note also that I need to detect a string as this "55,57" and also need to separate 55 from 57 splitting it in two variable like cmd and val to use in other line; any suggestion will be appreciated.
regards
nicotec |
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asmallri
Joined: 12 Aug 2004
Posts: 1635
Location: Perth, Australia
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| Re: to try |
| Posted: Mon Jan 26, 2009 2:57 pm |
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| nicotec wrote: | thanks, I'll try tomorrow morning (Italy) and I'll post here my results; please note also that I need to detect a string as this "55,57" and also need to separate 55 from 57 splitting it in two variable like cmd and val to use in other line; any suggestion will be appreciated.
regards
nicotec |
Implement a serial ring buffer. Leave it to the mainline code to extract characters from the ring buffer and perform any processing. Check the forum, you will find plenty of examples.
_________________
Regards, Andrew
http://www.brushelectronics.com/software
Home of Ethernet, SD card and Encrypted Serial Bootloaders for PICs!! |
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nicotec
Joined: 07 Nov 2008
Posts: 60
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| near to sove problem |
| Posted: Tue Jan 27, 2009 2:06 pm |
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Thanks for your help since I solved some problem; I solved also an hardware problem since I forgotten to connect pin 6 of MAX233 to ground and receiving serial data doesn't work properly.
Now I need to read my string like "55,1" (using interrupt RDA) in a variable and then split 55 and 1 into two variable to process correctly in my main program. I think to use strtok function. What do You think about it?
Thanks in advance and regards.
nicotec |
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nicotec
Joined: 07 Nov 2008
Posts: 60
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| rs232 reading buffer |
| Posted: Thu Jan 29, 2009 2:14 pm |
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Hi, I have a question about reading rs232 buffer register, since I need to know type of format of variable
(ex:
char mystring;
gets(mystring); this line is enough to read somethink from rs232 buffer?
Thanks in advance
Regards |
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