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https://opencores.org/ocsvn/neorv32/neorv32/trunk
[/] [neorv32/] [trunk/] [rtl/] [core/] [neorv32_wishbone.vhd] - Diff between revs 53 and 56
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| Rev 53 |
Rev 56 |
| Line 191... |
Line 191... |
when IDLE => -- waiting for host request
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when IDLE => -- waiting for host request
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-- ------------------------------------------------------------
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-- ------------------------------------------------------------
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ctrl.rd_req <= '0';
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ctrl.rd_req <= '0';
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ctrl.wr_req <= '0';
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ctrl.wr_req <= '0';
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-- buffer all outgoing signals --
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-- buffer all outgoing signals --
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ctrl.we <= wren_i;
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ctrl.we <= wren_i or ctrl.wr_req;
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ctrl.adr <= addr_i;
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ctrl.adr <= addr_i;
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if (xbus_big_endian_c = true) then -- endianness conversion
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if (xbus_big_endian_c = true) then -- endianness conversion
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ctrl.wdat <= data_i;
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ctrl.wdat <= data_i;
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ctrl.sel <= ben_i;
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ctrl.sel <= ben_i;
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else
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else
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| Line 204... |
Line 204... |
end if;
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end if;
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ctrl.src <= src_i;
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ctrl.src <= src_i;
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ctrl.excl <= excl_i;
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ctrl.excl <= excl_i;
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ctrl.priv <= priv_i;
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ctrl.priv <= priv_i;
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-- valid new or buffered read/write request --
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-- valid new or buffered read/write request --
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if ((xbus_access and (wren_i or ctrl.wr_req or rden_i or ctrl.rd_req)) = '1') then
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if ((xbus_access and (wren_i or ctrl.wr_req or rden_i or ctrl.rd_req) and (not cancel_i)) = '1') then
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ctrl.state <= BUSY;
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ctrl.state <= BUSY;
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end if;
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end if;
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when BUSY => -- transfer in progress
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when BUSY => -- transfer in progress
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-- ------------------------------------------------------------
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-- ------------------------------------------------------------
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| Line 235... |
Line 235... |
ctrl.state <= RESYNC;
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ctrl.state <= RESYNC;
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end if;
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end if;
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when RESYNC => -- make sure transfer is done!
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when RESYNC => -- make sure transfer is done!
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-- ------------------------------------------------------------
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-- ------------------------------------------------------------
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ctrl.wr_req <= ctrl.wr_req or wren_i; -- buffer new request
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ctrl.rd_req <= ctrl.rd_req or rden_i; -- buffer new request
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if (wb_ack_i = '0') then
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if (wb_ack_i = '0') then
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ctrl.state <= IDLE;
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ctrl.state <= IDLE;
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end if;
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end if;
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when others => -- undefined
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when others => -- undefined
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