xbee transmitter & receiver

[Ioannis]

Well, I can only guess. You may have not set correctly I/O, ADC or other parameters of the chip yoy are using...

Ioannis

[Acetronics2]

Well, I can only guess. You may have not set correctly I/O, ADC or other parameters of the chip yoy are using...

Ioannis

As those modules can sink or source 2mA ...

no doubt it's some wrong config of the I/Os ... or some damaged input due to previous adventures ...

Alain

[hell_pk]

I already have changed the chip & verified the code and chip on another board. It just has to receive the data from Xbee receiver on its Rx pin,do some calculations & send it through Tx pin to LCD. Both Xbee & 18F1320 work fine when separated. As soon as 18F1320 is inserted in circuit something weird goes on.

[Ioannis]

Hmm, then an exorcism might help...

Ioannis

[Acetronics2]

I already have changed the chip & verified the code and chip on another board. It just has to receive the data from Xbee receiver on its Rx pin,do some calculations & send it through Tx pin to LCD. Both Xbee & 18F1320 work fine when separated. As soon as 18F1320 is inserted in circuit something weird goes on.

Hi, Hell_pk

as your code and scheme might be rather simple ...

Would be easy for you to provide both Here.

just for us to talk about REAL things.

Alain

[hell_pk]

'Receiver side code

DEFINE OSC 8


DEFINE HSER_RCSTA 90h ' Enable serial port & continuous receive
DEFINE HSER_TXSTA 20h ' Enable transmit, BRGH = 0
DEFINE HSER_SPBRG 12 ' 9600 Baud @ 8MHz, 0.16%
DEFINE HSER_CLROERR 1 ' Clear overflow automatically



TRISB = %00000000 ' Set RX (PortB.4) to output

char var byte
i var byte
TrisA= %00000000 'All PORTA pins configured as output
ADCON1= %11111111 'All PORTA pins configured as digital




loop:
'RCSTA = $90 ' Enable serial port & continuous receive
'TXSTA = $20 ' Enable transmit, BRGH = 0
'SPBRG = 12 ' 9600 Baud @ 8MHz, 0.16%


for i=1 to 6
Hserin [char] ' Get a char from serial port
next i

Pause 850 ' Delay for 1 usec,use larger delay for real device


'RCSTA = $90 ' Enable serial port & continuous receive
'TXSTA = $24 ' Enable transmit, BRGH = 1
'SPBRG = 25 ' 19200 Baud @ 8MHz, 0.16%

for i=1 to 6
Hserout [char]
next i
Pause 850
Goto loop ' Go back to loop and blink LED forever
;End

[Ioannis]

I really cannot follow your thinking.

You send 16 times the same character char and also receive 16 times a character into the same variable char.

Why is that?

What are you trying o do? It just doesn't make sense...

Ioannis

[hell_pk]

Does it matter......it receives chars wirelessly & sends it to hyper terminal on PC via serial port. Its just to check for chars i receive wirelessly.
Anyways I modified my design and am doing calculations on transmitter side. No microcontroller on receiver side now so the problem is resolved from my point of view. But still I have no idea how the original problem started.