Proto board Serial Communications

rporter

I'm new to spin so this may be a very simple question - can you designate two pins (tx, rx) on two seperate protoboards and have them pass information using FullDuplexSerial?· I've tried to send a character (7) to another board with no success.· I'm not trying anything complicated, I just want to pass info between the two boards.· Printing to the LCD works fine but no matter what I do I can't recieve the data I'm transmitting.· I've posted my test code below:

Board 1 - transmitting board:

OBJ
· Link········· : "FullDuplexSerial"
···
PUB Main
'

---

' Main
'

---

· ' Start the serial communications to·board 2
· Link.Start(9, 8, 0, 9600)
· ' Blink LED
·· Blink
·· Repeat
······ ProcessCommand

PRI ProcessCommand
· Link.tx(7)···

PRI Pause_ms(msDelay)
· waitcnt(cnt + ((clkfreq / 1000) * msDelay))

PRI Blink
· dira[noparse][[/noparse]Pin_Led]~~···
· outa[noparse][[/noparse]Pin_Led]~~
· Pause_ms(100)
· outa[noparse][[/noparse]Pin_Led]~
Board 2 - Receiving board:

PUB Init
'

---

' Initialize
'

---

· ' Initialize the LCD
· Lcd.start(Pin_Lcd, 19200, 2)························· ' start lcd
· Lcd.cursor(2)········································ ' cursor off
· Lcd.cls
· Lcd.home
· Lcd.backLight(true)·································· ' backlight on (if available)
' Start the serial communications to the board 1
· Link.Start(8, 9, 0, 9600)
·
· ' Initialize speaker
· Speaker.Init(Pin_Speaker)
· Speaker.Beep(500,500)
·· ' Initialize and blink LED
· Blink
· Pause_ms(1000)

· Lcd.str(string("Testing"))
· Repeat
···· Ready

PRI Ready | char, pid, b
··· Link.rxflush
··· pid := 0
··· if (char := Link.rxcheck) => 0
····· if char == 19
······· b := Link.rxtime(100)
······· repeat while b > 0
········· pid := Link.rxtime(100)
········· b--
· Lcd.clrln(0)
· Lcd.gotoxy(0,0)
· Lcd.dec(char)
· Lcd.clrln(1)
· Lcd.gotoxy(0,1)
· Lcd.dec(pid)
· Pause_ms(200)

PRI Pause_ms(msDelay)
· waitcnt(cnt + ((clkfreq / 1000) * msDelay))

PRI Blink
· dira[noparse][[/noparse]Pin_Led]~~···
· outa[noparse][[/noparse]Pin_Led]~~
· Pause_ms(100)
· outa[noparse][[/noparse]Pin_Led]~
·······

deSilva

(a) You flush the buffer, so you will not see anything just two lines later
(b) You configured to 80 MHz, didn't you?
(c) It is difficult upto impossible to sync to a continuesly transmitting source using an asynchronious protocol - make pauses from time ti time when transmitting

rporter

deSilva

I removed the buffer flush as you suggested.
Both boards are configured to 80MHz
I added a 100ms delay on the tx

SUCCESS!! I can't thank you enough, this problem was driving me crazy and your suggestions did the trick.