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E_KARVELAs
Joined: 14 Feb 2007
Posts: 46
Location: Greece & Cyprus
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| Simple code for 1way wireless link |
 Posted: Tue Jan 29, 2008 7:27 pm |
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HI
i wanted to test some wireless module from SparkFun on a simple one way link but with NO results something wrong on the code.
http://www.sparkfun.com/commerce/product_info.php?products_id=7815
From the code of receiver the #int_rda does not fire .
Can any one help me what i got wrong here???
Trasmitter Code:
| Code: |
#include <18F452.h>
#fuses XT, NOWDT, NOPROTECT,NOLVP,NOBROWNOUT, PUT
#use delay (clock = 4000000)
#use rs232(baud=1200, xmit=PIN_D3, rcv=PIN_D4, ERRORS, STREAM=COM_A)
void main()
{
for(;;){
if(input(PIN_C4)==0) //if button pressed
{
output_high(PIN_D2); //enable Vcc of transmitter module
output_high(PIN_D1); //output high Led
delay_ms(20);
fputc('T', COM_A);
delay_ms(20);
delay_ms(1000); //delay some ms
output_low(PIN_D1); // output low led
output_low(PIN_D2); //disable Vcc of transmitter module TSW434
}
output_high(PIN_D1); // if button not pressed then just on off led on pin D1
delay_ms(50);
output_low(PIN_D1);
delay_ms(50);
}
}
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Receiver Code:
| Code: |
#include <18F452.h>
#fuses XT, NOWDT, NOPROTECT,NOLVP,BROWNOUT, PUT
#use delay (clock = 4000000)
#use rs232(baud=1200,parity=N, xmit=PIN_D3, rcv=PIN_D2, ERRORS, STREAM=COM_A)
char data;
#int_RDA
void RDA_isr(void)
{
data= fgetc(COM_A);
}
void main()
{
enable_interrupts(global);
enable_interrupts(int_rda);
for(;;){
if(data=='T')
{
output_high(PIN_D1);
delay_ms(1000);
output_low(PIN_D1);
data=0;
}
output_high(PIN_D1);
delay_ms(50);
output_low(PIN_D1);
delay_ms(50);
}
}
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Code can compile OK with no errors i just can't sent data right from Tranmitter-pic to Receiver-pic..
i have wired data-pin from PIC-Receiver wich is rcv=PIN_D2 to the data pin
of RWS 434.
On the ather PIC-Tramitter i have wired the xmit=PIN_D3 to data pin of TWS 434. 
_________________
---- GREECE ---- |
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E_KARVELAs
Joined: 14 Feb 2007
Posts: 46
Location: Greece & Cyprus
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| Posted: Wed Jan 30, 2008 9:02 am |
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Hi again!!!
Can Any one offer me a small example code that actually work with these wireless module as a one way link ??
Im trying to be familiar with these wireless module ,sending data from one pic to ather.
_________________
---- GREECE ---- |
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E_KARVELAs
Joined: 14 Feb 2007
Posts: 46
Location: Greece & Cyprus
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| Posted: Wed Jan 30, 2008 10:09 am |
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hi.
I found the problem,Now code works ok!!!!!!!!!!!
The issue was i had to change the ----pin_C7 for Tx
and the ----pic_C6 for Rx
for both pic of course. Cheers!!!
As i found this info from the datasheets -18F542 -USART.
These code now works file with wireless module from :
http://www.sparkfun.com/commerce/product_info.php?products_id=7815
transmitter
| Code: |
#include <18F452.h>
//-------------------------------------------------------------------------------
#define WireTX PIN_C6 // <--------- C 6
#define WireRX PIN_C7
//-------------------------------------------------------------------------------
#fuses XT, NOWDT, NOPROTECT,NOLVP,NOBROWNOUT, PUT
#use delay (clock = 4000000)
#use rs232(baud=2400,xmit=WireTX , rcv=WireRX ,ERRORS , STREAM=COM_A )
void main()
{
for(;;){
if(input(PIN_C4)==0) //if button pressed
{
output_high(PIN_D2); //enable Vcc of transmitter module
output_high(PIN_D1); //output high Led
delay_ms(20);
fputc('T',COM_A);
delay_ms(20);
delay_ms(1000); //delay some ms
output_low(PIN_D1); // output low led
output_low(PIN_D2); //disable Vcc of transmitter module TSW434
}
output_high(PIN_D1); // if button not pressed then just on off led on pin D1
delay_ms(50);
output_low(PIN_D1);
delay_ms(50);
}
}
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Receiver
| Code: |
#include <18F452.h>
#fuses XT, NOWDT, NOPROTECT,NOLVP,BROWNOUT, PUT
#use delay (clock = 4000000)
//------------------------------
#define WireTX PIN_C6
#define WireRX PIN_C7 //<-----
//------------------------------
#use rs232(baud=2400, xmit=WireTX, rcv=WireRX, ERRORS, STREAM=COM_A)
unsigned int8 data;
int1 flag=0;
#int_rda
void rd_isr(void)
{
disable_interrupts(INT_RDA); // Disable Serial Recieve Interrupt
disable_interrupts(GLOBAL); // Disable Global Interrupts
data= fgetc(COM_A);
if(data=='T'){
flag=1;
}
enable_interrupts(GLOBAL);
enable_interrupts(INT_RDA);
}
void main()
{
enable_interrupts(global);
enable_interrupts(int_rda);
for(;;){
if(flag==1)
{
output_high(PIN_D1);
delay_ms(1000);
output_low(PIN_D1);
flag=0;
}
output_high(PIN_D1);
delay_ms(50);
output_low(PIN_D1);
delay_ms(50);
}
}
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_________________
---- GREECE ---- |
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anandpv2009
Joined: 26 Jul 2009
Posts: 31
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| Thanks Thanks |
| Posted: Mon Sep 21, 2009 12:26 pm |
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Thank u friend for this code.....................
It works............... |
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