Changes between Version 8 and Version 9 of OFDM/MIMO/Docs/AutoResponse


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Timestamp:
Aug 29, 2009, 3:06:11 PM (15 years ago)
Author:
murphpo
Comment:

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  • OFDM/MIMO/Docs/AutoResponse

    v8 v9  
    2121 * PHY_AUTORESPONSE_MATCH_CONFIG(''addr'', ''len'', ''val''): Configure the match unit to check whether ''len'' header bytes starting at ''addr'' match value ''val''
    2222
    23 '''Actor configuration:'''
    24 Each actor is configured with a single register write; each actor is access with its own macro ({{{mimo_ofdmTxRx_setActionN(''config'')}}}), where N is in [0,5] and ''config'' is the value returned by one of these actor configuration macros:
    25  * PHY_AUTORESPONSE_TXACTION_CONFIG(''pktBuf'', ''translateHdr'', ''delay'', ''conditions''): Configure the actor to automatically transmit:
     23'''Actor configuration:''' [[BR]]
     24Each actor is configured with a single register write; each actor is accessed with its own macro ({{{mimo_ofdmTxRx_setActionN(''config'')}}}), where N is in [0,5] and ''config'' is the value returned by one of these actor configuration macros:
     25 * PHY_AUTORESPONSE_TXACTION_CONFIG(''pktBuf'', ''options'', ''delay'', ''conditions''): Configure the actor to automatically transmit:
    2626   * ''pktBuf'': index (in ![1,31]) of the packet buffer from which to automatically transmit the packet
    27    * ''translateHdr'': enable the header translator when this actor triggers a transmission 'PHY_AUTORESPONSE_ACT_TRANS_HDR: use the translator; 0: disable the translator)
     27   * ''options'': enable the header translator when this actor triggers a transmission 'PHY_AUTORESPONSE_ACT_TRANS_HDR: use the translator; 0: disable the translator)
    2828   * ''delay'': number of 0.25µs increments to delay the automatic transmission. The time starts when the final byte of the incoming packet is decoded, even if the actor doesn't depend on the payload error status
    2929   * ''conditions'': bitwise OR'd combination of actor condition flags; every condition must be met by a given reception to trigger the actor.
    … …  
    3131 * PHY_AUTORESPONSE_ACTION_SETFLAGB_CONFIG(''conditions''): Configure the actor to set Flag B; ''conditions'' is a bitwise OR'd combination of actor condition requirements
    3232
    33 '''Actor condition requirements:'''
    34 
     33'''Actor condition requirements:''' [[BR]]
     34The following values are used to specify the conditions for each actor. These values should be bitwise OR'd together to form the ''conditions'' field in the {{PHY_AUTORESPONSE_TXACTION_CONFIG}} macro.
    3535 * PHY_AUTORESPONSE_REQ_GOODHDR: Packet currently being received is decoded without header errors
    3636 * PHY_AUTORESPONSE_REQ_BADPKT: Packet currently being received has errors in payload but not header
    … …  
    4545 * PHY_AUTORESPONSE_REQ_MATCH5: Match unit 5 conditions are met by the current packet header
    4646
    47 '''Actor options:'''
    48 
     47'''Actor options:''' [[BR]]
     48The following values are used to specify the options for each actor. These values should be bitwise OR'd together to form the ''options'' field in the {{PHY_AUTORESPONSE_TXACTION_CONFIG}} macro.
    4949 * PHY_AUTORESPONSE_ACT_TRANS_HDR: Use the header translator for the auto-triggered transmission
    5050
    … …  
    5353 * PHY_HEADERTRANSLATE_SET(''actionBuf'', ''txByteNum'', ''srcBuf'', ''srcByteNum''): Configure the translator to send the byte at index ''srcByteNum'' from the packet buffer ''srcBuf'' as byte number ''txByteNum'' for packets automatically transmitted from packet buffer ''actionBuf''
    5454
     55== Sample Code ==
     56The examples below illustrate how to use the OFDM PHY's auto response subsystem. These examples include only the auto responder configuration code. Please refer to the latest [wiki:OFDMReferenceDesign OFDM Reference Design] for a full hardware-ready MAC/PHY example which uses this code.
    5557
    56 == Sample Code ==
     58The examples below assume each packet has a 24-byte header, using the format of {{phyHeader}} from [source:/PlatformSupport/WARPMAC/warpphy.h warpphy.h]. Specifically, the examples assume the header has fields:
     59{{{
     60#!C
     61unsigned short int srcAddr;     //Source MAC address
     62unsigned short int destAddr;    //Destination MAC address
     63unsigned short int relAddr;     //Relay MAC address
     64unsigned char pktType;          //Packet type
     65}}}
     66
     67=== Automatic ACKs ===
     68This example configures the PHY to automatically transmit an ACK packet whenever a DATA packet is received whose destination address matches the local node's address. This is the usual behavior of protocols like Aloha and CSMA. Notice that all other MAC behaviors, like random backoffs and re-transmissions, are handled by the MAC implementation in C (not included here).
     69
    5770{{{
    5871#!C