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Hi,
We are doing some tests on the quality of the communication between 2 CY3275 devkits.
In order to check the packet error rate, I've set the following registers : Rx_Overwrite = 1, this way the rx_packet_dropped status flag won't trigger, and TX_Retry = 0. With this register setup, we are able to detect transmission errors on each invalid CRC. (no ACK on error).
With this method, I filled each payload with 31 data Bytes (total packet size : 39 Bytes) and transmitted at a bitrate of 2400bps. For 1000 packets transmitted, I have at least 1 lost packet. Is that normal, for a link which is only 1 or 2 meters long ?
=> 1 packet on 1000 : with the hypothesis we have at least 1 fault bit in the fault packet : BER = 1/(39*12*1000) = 2,1e-6
Another question : in the API provided by Cypress, almost all functions are defined, and I can easily find the source code for each of them. But i can't find the definition and source code of PLT_Poll() !! And i would like to know how this function works.
Thank you
Regards,
Fabien
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Not sure if you have seen this -
You may want to post a CASE
To file a tech case -
“Support”
“Technical Support”
“Create a MyCase”
Regards, Dana
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Thank you for these pieces of information ! I wasn't aware of this application note.
I will post a CASE.
Regards,
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Technical support aswered my question.
PLT_Poll() source code can't be viewed and is defined in a hidden library object file... :'(
TY anyway
Fabien
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Dear Dana
The link you mentioned, I would like to read, but it gives a 404 - file not found
Any suggestion where I can find the file?
TY
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Go here, using link create a CASE, and request it. Seems like its under revision.
http://www.cypress.com/search.cfm?q=an59464
Regards, Dana.