xport code, have example, confused though

[Archangel]

Hi Kenpo,
I do not think 628 is going to do it, no ADC.

[kenpo]

sorry, please ignore the ADC code he has in there then.
I have no plans of using ADC.

for now I simply want to send an integer number to an online script.

just a test.
I didn't want to edit his code and risk removing soemthing I shouldn't so it's just a copy/paste

[kenpo]

ok, so here's my modified version:

untested, but compiles.

what I am unsure of:
1. how to set the xport with all the funky terminal settings and if it can be done via pbp

2. right now his code waits for a 0 return.
I'd like to receive more than that. ie, the number 55 and then do something like turn a pin HIGH. I'm unsure of how to do that though without breaking it. ie, it's waiting for a 0 return..

sorry for those of you that breath code, this must seem very silly

include "modedefs.bas"

@ DEVICE pic16F628A, INTRC_OSC_NOCLKOUT
' System Clock Options 

@ DEVICE pic16F628A, MCLR_OFF
' Master Clear Options (Internal)
  DEFINE OSC 4
  CMCON = 7		




'   pins to define serial RZX and TX
tx var portA.6
rx var portA.7
'   pins with LEDs to indicate whether we're connecting
'   or sending an HTTP request:
httpPin var portb.7
TCPPin var portb.6
output TCPPin
output httpPin

' constant to set the baud rate:
inv9600 con 16468
'   for non-inverted connections (PIC to Xport direct):
true9600 con 84

' define variables:
adcVar var word
inByte var byte
connected var bit

connected = 0

' pause to let Xport boot up:
pause 2000
 main:
  ' if you're connected to the server, then
  ' make a HTTP call.  If not, then connect
  ' to the server:
  if connected = 1 then
  ' read sensors, convert to bytes:
      adcVar = 55
      ' send HTTP GET request for php script:
    gosub http_request
  else
    ' attempt to connect to the server:
    gosub xport_connect
  endif
  tcpPin = connected
  ' pause so we're not overwhelming the server:
  pause 3000
goto main

xport_connect:
    ' turn off LED to indicate HTTP GET is in progress:
    'low tcpPin
    '   wait for a "C" byte to come back:
    while inByte <> 67
        serout2 tx, true9600, ["C128.122.253.189/80", 10]
        serin2 rx, true9600, [inByte]
    wend
    ' turn on TCP pin to indicate that we connected:
    'high TCPPin
    connected = 1
return

http_request:
adcVar = 56
    ' light LED to indicate HTTP GET request in progress:
    high httpPin
    SEROUT2 TX, true9600, ["GET /xport_test.php?action=insert&"]
    serout2 tx, true9600, ["sensorValue=", DEC adcVar]
    serout2 tx, true9600, [" HTTP/1.1", 10]
    serout2 tx, true9600, ["HOST: brandejs.ca", 10, 10]
    ' wait for bytes from server:
    ' php script sends a 0 to end transmission:
    while inByte <> 0
        serin2 rx, true9600, [inByte]
    wend
    ' now we're disconnected:
    connected = 0
    ' turn off LED, since GET request is complete:
    low httpPin
return

[kenpo]

look at me, spamming my own post...

just wondering, could I do soemthing like change

while inByte <> 0
        serin2 rx, true9600, [inByte]
    wend

to

while inByte == z
        serin2 rx, true9600, [inByte]
    wend

that way I set inByte earlier on as 'z' and then it hangs down below until I get the number 55, or 3 or 0.

I'm imagining grabbing the weather value in degrees off the net for example

(and having my php script only output an integer value, not the extra html filler)

[mister_e]

Forget SERIN/SEROUT @ 9600 baud @4MHZ... even worst when dealing with the internal OSC. That PIC have a USART, use it + ceramic resonator + crystal for more reliable results.

You could try DEBUG/DEBUGIN... but there's no advantages over HSERIN/HSEROUT appart the possibility to use Inverted mode.

[kenpo]

that's just what I was thinking here as I was editing the code.
I looked up the manual for the xport so I can now see there's terminal options for setting it up, as well as their software and I can change 9600 to 2400

however I don't really see if it's possible to do all that from the pic. it seems it only needs to be done once? is that right?

I think the 16f628a internal OSC with 2400 should be reliable enough right?
it's a hobby project. I could take it even lower though there's not alot of data being sent.


the last function is now changed to

http_request:
adcVar = 56
    ' light LED to indicate HTTP GET request in progress:
    high httpPin
    inByte = "z"
    
    SEROUT2 TX, T2400, ["GET /xport_test.php?action=insert&"]
    serout2 tx, T2400, ["sensorValue=", DEC adcVar]
    serout2 tx, T2400, [" HTTP/1.1", 10]
    serout2 tx, T2400, ["HOST: brandejs.ca", 10, 10]
    ' wait for bytes from server:
    ' php script sends anything other than Z to end transmission:
    while inByte == "z"
        serin2 rx, T2400, [DEC inByte]
    wend
    ' now we're disconnected:
    connected = 0
    ' turn off LED, since GET request is complete:
    low httpPin
return

[mister_e]

You're using True mode... why messing with bit banged SERIN/SERIN2/DEBUGIN while your PIC have built-in USART???? No advantage at all, and use more codespace as well...

HSERIN/HSEROUT and away you go.

I NEVER use internal OSC when I have to deal with async serial communication. OK OK I hear some "I did it, I still do it and it works all the time" .. well ... good for you