propeller bell202modem object , I can not receive data

RPLO

Dear Philip,

I just download the propeller bell modem object and I have some problems to work with the Object .


1.- I am not using a Backpack board

2.- I use a two separated boards one as a transmitter , and one as a receiver , we add the resistors an capacitors defined in the manual, like diagram attached 81731

3.- I dowload the into the transmitter the Bell202_modem_demo_transmitter.spin ( attached 81733)
and into the receiver the modem_monitor_modificadorlo.spin ( attached 81735)


3.- to check and adjust the link , we run the monitor.exe programm and I can adjust the system to near de –5 and we can see the data that we are sending in the right window. diagram attached 81732

it does mean that the transmiter and receiver are working ok

4.- then I load the Bell202_modem_demo_modificadorlo.spin to the receiver ( attached 81733)
, but we can not receive any data. It indicate Nothing received.


What we are doing wrong?

modem_monitor_modificadorlo.spinbell202_modem_demo_transmiter.spinmodem monitor software test view.odttest modem diagram.odgbell202_modem_demo_modificadoRLO.spin

Phil Pilgrim (PhiPi)

RPLO,

Welcome to the forum!

In your modified program, you have the line:

USING_BP      = true

If you're not using the Backpack, USING_BP should be set to false.


-Phil

RPLO

Thanks for the reply ,

But I put the USING_BP = false and still Nothing Received

Phil Pilgrim (PhiPi)

You've got two calls to a start method. Delete this one:

    mdm.start_explicit(|<0,0,0,|<3, |<2,|<3,0,0,|<3,mdm#LVL8)

-Phil

RPLO

Excuse I sent the wrong file, here is the code that we are using and we still Have Nothing Received

CON

XMT = false '─────── Set true for transmit demo, false for receive demo.
USING_BP = false '─────── Set true for Propeller Backpack, false for simple setup.

RCVPIN = 0 '┐
XMTPIN = 2 '┼────────── Change, as needed, for non-Backpack use.
PTTPIN = 3 '┘

_clkmode = xtal1 + pll16x
_xinfreq = 5_000_000


OBJ

mdm : "bell202_modem"
num : "simple_numbers"
ser : "FullDuplexSerial"

VAR

byte strbuf[64]

PUB main

mdm.start_simple(RCVPIN, XMTPIN, PTTPIN, 0)
'mdm.start_explicit(|<0,0,0,|<3, |<2,|<3,0,0,|<3,mdm#LVL8)
mdm.receive
mdm.set(mdm#HYST, $0200_0000)
mdm.set(mdm#SLICE, $ff20_0000)
mdm.set(mdm#NOISE, $1000_0000)

if (XMT)
do_transmit
else
do_receive

PUB do_transmit | i

i~
repeat
mdm.transmit
mdm.outstr(string("!Testing "))
mdm.outstr(num.decf(i++, 4))
mdm.outstr(string(" de YOUR CALLSIGN", 13)) '─────── callsign here if using radio transmission.
mdm.standby
waitcnt(cnt + clkfreq * 2)

PUB do_receive | timeout

ser.start(31, 30, 0, 9600)
ser.str(string("Beginning reception...", 13))
repeat
timeout~~
'if (mdm.waitstr(string("!Testing "), 4000))
if (mdm.waitstr(string("qwerty "), 4000))
ser.str(string("detectado", 13))
if (mdm.inpstr(@strbuf, 13, 60, 4000))
ser.str(@strbuf)
timeout~
if(timeout)
ser.str(string("Nothing received.", 13))

Phil Pilgrim (PhiPi)

Can you repost your program, please, using these guidelines?

http://forums.parallax.com/showthread.php?129690-How-to-post-program-code-in-the-forum.

Or just attach the Spin file, like you did before.

Also, what is your transmitter transmitting? Is it actually sending the "qwerty" that the receiver is waiting for?

-Phil

RPLO

Thanks for your reply Philips

Yes I am sending qwerty string,

Now I take the modem_monitor.spin that had receiving and I modified to receive the data that I want and it work fine. to see it I am sending character to character to debug.
I have attached the modifications.
I still tryng to know what is wrong with the first programm.
modem_monitor_modificadopara_receiver_rlo.spin
RPLO

Phil Pilgrim (PhiPi)

I see there's a space after qwerty in the waitstr call. Are you transmitting the space? Please attach the program that's sending the qwerty.

-Phil