Changes between Version 21 and Version 22 of 802.11/PacketFlow
- Timestamp:
- Jan 23, 2019, 10:09:20 AM (6 years ago)
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802.11/PacketFlow
v21 v22 72 72 [[Image(tx_pkt_buf_pingpong_impl.png,width=300,align=right)]] 73 73 74 The {{{tx_frame_info_t}}} struct has a {{{tx_pkt_buf_state}}} field used by the upper and lower MAC designs to coordinate access to the packet buffer contents. There are f our possible states for an Rx packet buffer:74 The {{{tx_frame_info_t}}} struct has a {{{tx_pkt_buf_state}}} field used by the upper and lower MAC designs to coordinate access to the packet buffer contents. There are five possible states for a Tx packet buffer: 75 75 * {{{UNINITIALIZED}}}: the default state following a reconfiguration of the FPGA. The MAC code never sets a buffer to this state. 76 76 * {{{HIGH_CTRL}}}: the buffer is under control of CPU High. The MAC code in CPU Low must not read or write the buffer.