[Dspforum] CIPR question

[Jones, Billy]

The CIPR register can always be changed on the fly with EDMA_RSET(CIPR, n).  If the CIPR is being read for indication of transfer completion (like in the waitfordma() function in this week's lab), it needs to be reset/cleared after that read.

Billy Jones
Digital Hardware Engineer
Thales Communications, Inc.
Land & Joint Systems Division

Tel:    240-864-7323
Fax:   240-864-7313
Billy.Jones at Thalescomminc.com

From: dspforum-bounces at echelonembedded.com [mailto:dspforum-bounces at echelonembedded.com] On Behalf Of O'Connor, Sean R.
Sent: Tuesday, November 03, 2009 10:21 AM
To: dspforum at echelonembedded.com
Subject: [Dspforum] CIPR question

Setting the OPT registers for ping and pong to 0x20320002 and 0x20310002 should set CIPR to 2 and 1 when the transfers have completed, I think.  CIPR is actually getting set to 6 and 4 respectively, and if I use 6 and 4 as my masks things seem to operate as expected (at least ping and pong get updated and waitfordma() does not hang).  To my knowledge the OPT register is the only register that can effect the CIPR... so this discrepancy is confusing to me.  Any thoughts?

Thanks,
Sean




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