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[/] [open8_urisc/] [trunk/] [VHDL/] [o8_sdlc_if.vhd] - Diff between revs 202 and 204
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| Rev 202 |
Rev 204 |
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Line 55... |
-- of 0xFF indicates that the recieved CRC matches the calculated CRC.
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-- of 0xFF indicates that the recieved CRC matches the calculated CRC.
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--
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--
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-- **** This location serves as the status register for the receive
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-- **** This location serves as the status register for the receive
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-- 1) This value is only updated on reception of a full frame, indicated
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-- 1) This value is only updated on reception of a full frame, indicated
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-- by a start followed by a stop flag. Incomplete frames are ignored.
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-- by a start followed by a stop flag. Incomplete frames are ignored.
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-- 2) If the packet CRC matches the transmitted CRC, the packet is
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-- 2) If too many bytes are received (buffer overflow), a value of
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-- considered valid, and the received length (less CRC) is written.
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-- 3) If the packet CRC doesn't match, a value of ERR_CHECKSUM is written.
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-- 4) If too many bytes are received (buffer overflow), a value of
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-- ERR_LENGTH is written.
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-- ERR_LENGTH is written.
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library ieee;
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library ieee;
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use ieee.std_logic_1164.all;
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use ieee.std_logic_1164.all;
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use ieee.std_logic_unsigned.all;
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use ieee.std_logic_unsigned.all;
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