close Warning: Can't synchronize with repository "(default)" (/common/SVN/crkit does not appear to be a Subversion repository.). Look in the Trac log for more information.

Changes between Version 1 and Version 2 of Software/Firmware/Framework/R3_arch/outline/pkt


Ignore:
Timestamp:
Jun 18, 2010, 5:52:45 PM (12 years ago)
Author:
khanhle
Comment:

--

Legend:

Unmodified
Added
Removed
Modified
  • Software/Firmware/Framework/R3_arch/outline/pkt

    v1 v2  
    11== Packet Format ==
    22
     3The CRKit packet format is as shown in figure 3. Host must conform to this specification to enable board level communication.
     4
     5__Figure 3 - Packet Format__
     6[[BR]][[BR]]
     7[[Image(pkt.jpg, 450px)]]
     8[[BR]][[BR]]
     9
     10The packet consists of following headers :
     11 * [wiki:Software/Firmware/Framework/R3_arch/ethernet Ethernet]
     12 * [wiki:Software/Firmware/Framework/R3_arch/ip IPv4]
     13 * [wiki:Software/Firmware/Framework/R3_arch/udp UDP]
     14 * [wiki:Software/Firmware/Framework/R3_arch/tcp TCP]
     15 
     16UDP is used for Host <-> CRKit communication e.g. RMAP read/write, status and data transmission.
     17
     18At this point, fragmentation/reassembly at IP level is not yet supported. We may include this feature in the future. Note that the IP packet size must
     19be 46-1500 bytes e.g. size of ethernet payload. Hence, max. UDP payload is 1500 - 20 (IP header) - 8 (UDP header) = 1472 bytes.   
     20
     21Furthermore, additional header information is added into the payload region for user specific control information :   
     22
     23 * [wiki:Software/Firmware/Framework/R3_arch/rmap_pkt RMAP Packet]
     24 * [wiki:Software/Firmware/Framework/R3_arch/status_pkt Status Packet]
     25 * [wiki:Software/Firmware/Framework/R3_arch/data_pkt Data Packet]
     26
     27Some sample packet configurations :
     28 * [wiki:Software/Firmware/Framework/R3_arch/sample_rmap RMAP]
     29 * [wiki:Software/Firmware/Framework/R3_arch/sample_data Data]
     30
     31[[BR]][[BR]] 
     32
    333[..]