Wireless problem

[supersonic]

Now that I solved(or going to solve...) reliability problems, I find that serin/serout work fine while hserin/hserout seem to have more problem...

Usart has been configured used pic multicalc.

I noticed that Mister_E adds the comment "Enable serial port & continuous receive" setting rcsta receiver.
Does it mean that hserin does not have to be in a loop? maybe something like:

hserin [#txpin]

main:
  lcdout $fe,row1,dec txpin
goto main

could work?

[Ioannis]

If you use the example you post, then you will display only the first byte and continue to display that exact byte endlessly.

If you send serial data then the buffer of the 2-byte long USART will overflow and depending on the setup will stop with error flag raised or replace old bytes with the new ones.

Please refer to your Data sheet of the PIC you are using for more infos about the USART and its associated flags and control bits.

If serin/serout work then I am sure that USART will work better and without having PIC to deal with the data untill they are available to process. You must have something wrong with your setup.

As Steve stated without the whole picture we can only guess.

Here in Greece we had the ancient times the oracle at Delphi and Pythia making guesses and prophecies but nowadays I suppose it is better to see, measure calculate and then conclude. So if you want real help post all you got (schematics, cablings, software, defines etc).

Ioannis

[supersonic]

If you use the example you post, then you will display only the first byte and continue to display that exact byte endlessly.

As the define comment says "continous receive" I guessed it could've be continuos receive in background while pic runs the program, as hpwm.

If you send serial data then the buffer of the 2-byte long USART will overflow and depending on the setup will stop with error flag raised or replace old bytes with the new ones.

I included DEFINE CLROERR 1 to clear overflow automatically.
And surely I still have to study a lot....

[supersonic]

Finally!

At last I've been able to use USART!
On the tx side I changed serout from N2400 to T2400 and the rx started to display correct data! Data is sent 10ms after powering the txer.

99% of data is correctly showed on the display.

Now I have to mount the sensor and send acquired data along with a sort of checksum.

I could stay hours watching the display:0...1...2...3...4..... to see if some of my numbers gets lost. Watching it for a minute, no problems!
So here is the working code for the TX:

INCLUDE "modedefs.bas"

ANSEL=0
CMCON0=%00000111

define osc 4
txpin   var gpio.4
led     var gpio.5
power   var gpio.2
i       var byte

low power

loop:
    for i=0 to 9
      high power
      pause 10
      serout txpin,t2400,[$55,$55,$55,$55,$66,#i]
      low power
      high led
      pause 30
      low led
      pause 1000
    next i
goto loop

And, of course RX:

define  OSC 20
Define 	LCD_LINES	4			' Settings for a 4x20 LCD
Define	LCD_DREG	PORTB		'   4bit mode
Define	LCD_DBIT	4			'
Define	LCD_RSREG	PORTB		
Define	LCD_RSBIT	3		 	
Define	LCD_EREG	PORTB'      
Define	LCD_EBIT	2

DEFINE HSER_RCSTA 90h ' Enable serial port & continuous receive
DEFINE HSER_TXSTA 20h ' Enable transmit, BRGH = 0
DEFine HSER_BAUD 2400
DEFINE HSER_CLROERR 1 ' Clear overflow automatically

'LCD Lines constants
row4        con	$d4
row3	    con	$94
row2	    con	$c0
row1	    con $80
hser var byte

intcon=0

pause 500
lcdout $fe,1
lcdout $fe, row1, "** RX TEST **"

loop:
      hserin [wait($66),hser]
      hserout [#hser]
      lcdout $fe, row3," hser: ",dec1 hser
goto loop

[Ioannis]

Congratulations!

Ioannis