| Line 86... |
Line 86... |
if (rst) begin
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if (rst) begin
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p0_out <= #1 `OC8051_RST_P0;
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p0_out <= #1 `OC8051_RST_P0;
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p1_out <= #1 `OC8051_RST_P1;
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p1_out <= #1 `OC8051_RST_P1;
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p2_out <= #1 `OC8051_RST_P2;
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p2_out <= #1 `OC8051_RST_P2;
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p3_out <= #1 `OC8051_RST_P3;
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p3_out <= #1 `OC8051_RST_P3;
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end else
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end else if (wr) begin
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case ({wr, wr_bit})
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if (!wr_bit) begin
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2'b10: begin
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case (wr_addr)
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case (wr_addr)
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//
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//
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// byte addresable
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// bytaddresable
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`OC8051_SFR_P0: p0_out <= #1 data_in;
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`OC8051_SFR_P0: p0_out <= #1 data_in;
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`OC8051_SFR_P1: p1_out <= #1 data_in;
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`OC8051_SFR_P1: p1_out <= #1 data_in;
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`OC8051_SFR_P2: p2_out <= #1 data_in;
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`OC8051_SFR_P2: p2_out <= #1 data_in;
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`OC8051_SFR_P3: p3_out <= #1 data_in;
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`OC8051_SFR_P3: p3_out <= #1 data_in;
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endcase
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endcase
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end
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end else begin
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2'b11: begin
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case (wr_addr[7:3])
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case (wr_addr[7:3])
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//
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//
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// bit addressable
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// bit addressable
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`OC8051_SFR_B_P0: p0_out[wr_addr[2:0]] <= #1 bit_in;
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`OC8051_SFR_B_P0: p0_out[wr_addr[2:0]] <= #1 bit_in;
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`OC8051_SFR_B_P1: p1_out[wr_addr[2:0]] <= #1 bit_in;
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`OC8051_SFR_B_P1: p1_out[wr_addr[2:0]] <= #1 bit_in;
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`OC8051_SFR_B_P2: p2_out[wr_addr[2:0]] <= #1 bit_in;
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`OC8051_SFR_B_P2: p2_out[wr_addr[2:0]] <= #1 bit_in;
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`OC8051_SFR_B_P3: p3_out[wr_addr[2:0]] <= #1 bit_in;
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`OC8051_SFR_B_P3: p3_out[wr_addr[2:0]] <= #1 bit_in;
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endcase
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endcase
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end
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end
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endcase
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end
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end
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end
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always @(p0_out or p0_in or p1_out or p1_in or p2_out or p2_in or p3_out or p3_in or rmw or rd_addr)
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always @(p0_out or p0_in or p1_out or p1_in or p2_out or p2_in or p3_out or p3_in or rmw)
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begin
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begin
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if (rmw) begin
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if (rmw) begin
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case (rd_addr[5:4])
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case (rd_addr[5:4])
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2'b00: data_out = p0_out;
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2'b00: data_out = p0_out;
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2'b01: data_out = p1_out;
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2'b01: data_out = p1_out;
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