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

Timestamp:

Jun 18, 2010, 5:52:45 PM (14 years ago)

Author:

khanhle

Comment:

--

Software/Firmware/Framework/R3_arch/outline/pkt

@@ -1 +1 @@
 == Packet Format ==
 
+The CRKit packet format is as shown in figure 3. Host must conform to this specification to enable board level communication. 
+
+__Figure 3 - Packet Format__ 
+[[BR]][[BR]]
+[[Image(pkt.jpg, 450px)]]
+[[BR]][[BR]]
+
+The packet consists of following headers :
+ * [wiki:Software/Firmware/Framework/R3_arch/ethernet Ethernet]
+ * [wiki:Software/Firmware/Framework/R3_arch/ip IPv4]
+ * [wiki:Software/Firmware/Framework/R3_arch/udp UDP]
+ * [wiki:Software/Firmware/Framework/R3_arch/tcp TCP]
+ 
+UDP is used for Host <-> CRKit communication e.g. RMAP read/write, status and data transmission. 
+
+At 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
+be 46-1500 bytes e.g. size of ethernet payload. Hence, max. UDP payload is 1500 - 20 (IP header) - 8 (UDP header) = 1472 bytes.    
+
+Furthermore, additional header information is added into the payload region for user specific control information :   
+
+ * [wiki:Software/Firmware/Framework/R3_arch/rmap_pkt RMAP Packet]
+ * [wiki:Software/Firmware/Framework/R3_arch/status_pkt Status Packet]
+ * [wiki:Software/Firmware/Framework/R3_arch/data_pkt Data Packet]
+
+Some sample packet configurations : 
+ * [wiki:Software/Firmware/Framework/R3_arch/sample_rmap RMAP] 
+ * [wiki:Software/Firmware/Framework/R3_arch/sample_data Data] 
+
+[[BR]][[BR]]  
+
 [..]