From cd35dd6d3f1343b8ec2590cf9bfc9a1bc41c4960 Mon Sep 17 00:00:00 2001 From: "Suren A. Chilingaryan" Date: Mon, 31 Oct 2011 06:34:26 +0100 Subject: Update scripts --- NOTES | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) (limited to 'NOTES') diff --git a/NOTES b/NOTES index 27990d0..94e4e95 100644 --- a/NOTES +++ b/NOTES @@ -145,6 +145,30 @@ DMA Access Synchronization user to check their consistency and restart DMA engine.] IRQs are enabled and disabled at each call + +DMA Reads +========= +standard: default reading mode, reads a single full packet +multipacket: reads all available packets +waiting multipacket: reads all available packets, after finishing the + last one waiting if new data arrives +exact read: read exactly specified number of bytes (should be + only supported if it is multiple of packets, otherwise + error should be returned) +ignore packets: autoterminate each buffer, depends on engine + configuration +autogrow: automatic memory allocation, only through streaming + + first | new_pkt | bufer + -------------------------- +standard wait | term | wait +multiple packets wait | check | wait - DMA_READ_FLAG_MULTIPACKET +waiting multipacket wait | wait | wait - DMA_READ_FLAG_WAIT +exact wait | wait/term | wait - limited by size parameter +ignore packets wait | check | check - just autoterminated +autogrow + +Shall we do a special handling in case of overflow? Register Access Synchronization =============================== -- cgit v1.2.3