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CyberTron
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| RS232 doesn´t seem to work?! HELP!! |
 Posted: Mon May 10, 2004 3:47 am |
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Hi!
I have been coding a code that is transmitting some numbers through RS232, at some random times,
Well, it doesnt´ seem to work
will anyone please say if the code should work?!?! (then at least I may lay the code behind my troubleshooting.
CODE:
| Quote: |
#include <16f870.h>
#include <stdlib.h>
#include <stdio.h>
/* Config för PIC-processor*/
#fuses XT, NOPROTECT, NOWDT, HS
#use delay (clock=4000000)
#use rs232(baud=19200,parity=N,xmit=PIN_C6,rcv=PIN_C7) // Jumpers: 8 to 11, 7 to 12
//#define RAND_MAX 60
void Config(void);
void Bevakning(void);
void tick(void);
void Clockwise(void);
void Counter_Clockwise(void);
int time_to_send=30;
int phase=8, step_pos=0;
unsigned int desired_step_pos=0;
/**************************************************/
/* Funktionen main() */
/* Funktionen startar Config() och Start() */
/* funktionerna samt även en oändlig whileloop */
/* som startar funktionen knappar() som känner */
/* av knapptryck */
/**************************************************/
void main(void)
{
Config();
while(1)
{
Tick();
}
}
/*****************************************************/
/* LÄGG ALLT SOM SKA STARTAS ENDAST EN GÅNG HÄR!!!*/
/*****************************************************/
void Config(void)
{
setup_adc_ports(RA0_RA1_RA3_ANALOG);
setup_adc(ADC_CLOCK_INTERNAL);
set_adc_channel(0);
setup_spi(FALSE);
setup_psp(PSP_DISABLED);
setup_counters(RTCC_INTERNAL,RTCC_DIV_2);
setup_timer_1(T1_DISABLED);
setup_timer_2(T2_DIV_BY_4,0xc0,2);
setup_ccp1(CCP_OFF);
enable_interrupts(INT_RDA);
enable_interrupts(INT_TIMER2);
enable_interrupts(global);
srand(1);
OUTPUT_HIGH(PIN_C4);
}
/***********************************************************/
/* HÅLLER KOLL PÅ OM DET FINNS STRÖM ELLER INTE */
/***********************************************************/
#INT_TIMER2 //timer function, random times
void tick(void)
{
static int8 tick=100;
static int8 time=10;
if (tick != 0)
--tick;
else
{
tick=100;
--time;
time_to_send=rand();
if (time_to_send == time)
Bevakning();
// else
// --time_to_send;
}
time=10;
}
void Bevakning(void) //sending function
{
int16 ad=12;
int16 id=5;
int16 random;
float check=0;
float test;
//ad=read_adc(); //time_to_send =0
check=(float)((id+ad)/2);
//test=(2*(check-id));
printf("%ld:%ld:%2.2f",id, ad, check);
ad=0;
check=0;
}
/************************************************/
/* Tar emot ett värde */
/************************************************/
#INT_RDA
void ta_emot(void)
{
int16 c;
int16 d;
int8 id=5;
if(kbhit())
{
c=getc();
if(c==id)
{
d=getc();
desired_step_pos=d;
if (desired_step_pos>step_pos)
{
Clockwise(); //not done yet
}
if (desired_step_pos < step_pos)
{
Counter_Clockwise(); //not done yet
}
}
}
}
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Woody
Joined: 11 Sep 2003
Posts: 83
Location: Warmenhuizen - NL
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| Posted: Mon May 10, 2004 4:36 am |
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Hi,
I am not completely sure what your program is meant to do but looking at it there are a couple of things that I would check:
- XT _and_ HS in the #fuses setting?
- In tick() tick and time are initialized to 100 and 10 every iteration. They never get to 0 and Bevakning() is never executed.
- tick() is executed every timer2 interrupt and also every pass through main?
Paul |
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ckielstra
Joined: 18 Mar 2004
Posts: 3680
Location: The Netherlands
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| Posted: Mon May 10, 2004 4:48 am |
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Can you be a little more specific? What is not working? In your headline you say the RS-232 is not working, but how would you confirm that? I mean, your rs-232 receive interrupt is doing nothing, so how can you say it is not working???
I don't know for the CCS compiler, but what value range is Rand() returning? You compare this return value to time (allways 9), I guess this will never be true so Bevakning() is nver called. |
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CyberTron
Guest
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| Posted: Mon May 10, 2004 5:30 am |
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The program should only be able to send a byte to the computer,
(the recieve part of the program is just *for fun*) |
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