Dear Friends,
Can you help me? I am working with RF Rx & Tx module, connected Rx Data pin with RxD of 8052 and Connected Tx Data pin with TxD of another 8052.
I am unable to interface it means not getting data on receiver side?
Is there any need of Antenna? Is yes then can i make that antenna?
Please help me.
RF 434MHz of both Rx & Tx from HIMARK Company.
Thanks & Regards Ramesh Khokhani.
connected Rx Data pin with RxD of 8052 and Connected Tx Data pin with TxD of another 8052
anyone can label anything in any screwy way BUT
I would suspect check the datasheet for the RF module that Tx of the RF module is where data comes out and thus it should be connected to the '51 Rx.
Erik
... include a link in the post
Easy to check if the circuit should have RX to RX and TX to TX or if it should be RX to TX and reverse.
If the transmit pin of the processor can't change between good low and high signals, then two outputs are connected together and are fighting.
It's always important to check the meaning of RX and TX. Is RX the pin when received radio data comes out, or the pin where digital data is recevied for radio transmission?
agreed, but I'd not recommend the method. If "the fight" goes on long enough (which sometimes is not very long) it will weaken or pop one or both the outputs.
There is no excuse for not reading the datasheet(s) before starting.
Hi Per,
Sorry for not clear writing in my first post.
Ya I have connected RF Receiver's Data pin to RxD of Controller. and RF Transmitter's Data to another Controller's TxD Pin so is it correct?
But m still not getting any output.
Thanks.
Hi Erik,
You are right on one way but I have connected one 8052's RxD to RF Receiver's Data pin and second 8052's TxD to RF Transmitter's Data pin.
Is it ok na?
Actually in my first post i have not mention clear as like above.
Still not working.
Can you help me.
you find out by carefully reading the devices datasheet. I will gladly quote you my charge for reading the datasheet for you
As noted in this very similar tread - http://www.keil.com/forum/18087/ - this is a hardware issue, and nothing to do with Keil.
Also, discussing connections in words (especially in a foreign language) is not very effective at all - you really need to post a diagram to show it clearly.
So, all in all, this is not a great forum for this discussion.
You might be better to go to http://www.8052.com/forum - with cross-references...
The thing is - I have not read the datasheet for your RF module. The data sheet should contain clear text - or diagarams - showing the data directions of the RX and TX pins. That is the proper way to make sure that you have connected serial out to serial in.
The test I mentioned is not how to design. Measuring the voltage swing on an output is something to do when everything is connected according to the datasheet, but you still don't get any connection. Measuring the swing of the output tells you: - that you don't have any short circuit in the PCB - that you haven't made use of an incorrect schematics symbol, resulting in misnumbering of pins - that a component hasn't been accidentally mounted wrong - possibly rotated. - ...