This page documents an integrated DAQ link receiver built into the AMC13. For firmware version v=0x10 this works fine using the old "Wu" format DAQ link protocol. Later versions omit the receiver as the protocol has changed and the CMS DAQ group haven't yet developed a Xilinx-compatible receiver.

For now, if version 0x10 is programmed into the AMC13, one can take data with a loop-back fiber plugged between the top two SFP sites and check it's integrity with the counters below.

Addr Name Descr Count when working? Count when not working?
0x10 LDC_accept_cntr Packets accepted Y N
0x11 LDC_abort_cntr Packets aborted N Y
0x12 LDC_ACK_cntr Packets acknowledged Y N
0x13 LDC_event_cntr Events received Y N
0x14 LDC_word_cntr Words received Y N
0x15 LDC_CRC_bad_cntr Packets with bad CRC N Y
0x16 LDC_SEQ_bad_cntr Packets with bad seq no. N Y
0x17 LDC_wc_bad_cntr Packets with wrong length N Y
0x18 LDC_frame_bad_cntr Packets with bad framing N Y
0x19 LDC_buf_ovf_cntr Buffer overflow counter N Y
0x1a LDC_CMSCRC_err CMS CDF CRC bad N Y

-- EricHazen - 31 Aug 2012

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Topic revision: r1 - 31 Aug 2012 - EricHazen
 
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