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Merge pull request #468 from grahamedgecombe/fix-sb-io-od 

Fix SB_IO_OD module
This commit is contained in:
Clifford Wolf 2017-12-13 16:55:39 +01:00 committed by GitHub
parent ca2adc30c9 f93e6637aa
commit 07bfe8ba40
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1 changed files with 19 additions and 19 deletions
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38
techlibs/ice40/cells_sim.v
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@ -1193,7 +1193,7 @@ module SB_IO_OD (
input DOUT1,
input DOUT0,
output DIN1,
output DIN0,
output DIN0
);
parameter [5:0] PIN_TYPE = 6'b000000;
parameter [0:0] NEG_TRIGGER = 1'b0;
@ -1205,44 +1205,44 @@ module SB_IO_OD (
reg outena_q;
generate if (!NEG_TRIGGER) begin
always @(posedge INPUT_CLK) if (CLOCK_ENABLE) din_q_0 <= PACKAGE_PIN;
always @(negedge INPUT_CLK) if (CLOCK_ENABLE) din_q_1 <= PACKAGE_PIN;
always @(posedge OUTPUT_CLK) if (CLOCK_ENABLE) dout_q_0 <= D_OUT_0;
always @(negedge OUTPUT_CLK) if (CLOCK_ENABLE) dout_q_1 <= D_OUT_1;
always @(posedge OUTPUT_CLK) if (CLOCK_ENABLE) outena_q <= OUTPUT_ENABLE;
always @(posedge INPUTCLK) if (CLOCKENABLE) din_q_0 <= PACKAGEPIN;
always @(negedge INPUTCLK) if (CLOCKENABLE) din_q_1 <= PACKAGEPIN;
always @(posedge OUTPUTCLK) if (CLOCKENABLE) dout_q_0 <= DOUT0;
always @(negedge OUTPUTCLK) if (CLOCKENABLE) dout_q_1 <= DOUT1;
always @(posedge OUTPUTCLK) if (CLOCKENABLE) outena_q <= OUTPUTENABLE;
end else begin
always @(negedge INPUT_CLK) if (CLOCK_ENABLE) din_q_0 <= PACKAGE_PIN;
always @(posedge INPUT_CLK) if (CLOCK_ENABLE) din_q_1 <= PACKAGE_PIN;
always @(negedge OUTPUT_CLK) if (CLOCK_ENABLE) dout_q_0 <= D_OUT_0;
always @(posedge OUTPUT_CLK) if (CLOCK_ENABLE) dout_q_1 <= D_OUT_1;
always @(negedge OUTPUT_CLK) if (CLOCK_ENABLE) outena_q <= OUTPUT_ENABLE;
always @(negedge INPUTCLK) if (CLOCKENABLE) din_q_0 <= PACKAGEPIN;
always @(posedge INPUTCLK) if (CLOCKENABLE) din_q_1 <= PACKAGEPIN;
always @(negedge OUTPUTCLK) if (CLOCKENABLE) dout_q_0 <= DOUT0;
always @(posedge OUTPUTCLK) if (CLOCKENABLE) dout_q_1 <= DOUT1;
always @(negedge OUTPUTCLK) if (CLOCKENABLE) outena_q <= OUTPUTENABLE;
end endgenerate
always @* begin
if (!PIN_TYPE[1] || !LATCH_INPUT_VALUE)
din_0 = PIN_TYPE[0] ? PACKAGE_PIN : din_q_0;
if (!PIN_TYPE[1] || !LATCHINPUTVALUE)
din_0 = PIN_TYPE[0] ? PACKAGEPIN : din_q_0;
din_1 = din_q_1;
end
// work around simulation glitches on dout in DDR mode
reg outclk_delayed_1;
reg outclk_delayed_2;
always @* outclk_delayed_1 <= OUTPUT_CLK;
always @* outclk_delayed_1 <= OUTPUTCLK;
always @* outclk_delayed_2 <= outclk_delayed_1;
always @* begin
if (PIN_TYPE[3])
dout = PIN_TYPE[2] ? !dout_q_0 : D_OUT_0;
dout = PIN_TYPE[2] ? !dout_q_0 : DOUT0;
else
dout = (outclk_delayed_2 ^ NEG_TRIGGER) || PIN_TYPE[2] ? dout_q_0 : dout_q_1;
end
assign D_IN_0 = din_0, D_IN_1 = din_1;
assign DIN0 = din_0, DIN1 = din_1;
generate
if (PIN_TYPE[5:4] == 2'b01) assign PACKAGE_PIN = dout ? 1'bz : 1'b0;
if (PIN_TYPE[5:4] == 2'b10) assign PACKAGE_PIN = OUTPUT_ENABLE ? (dout ? 1'bz : 1'b0) : 1'bz;
if (PIN_TYPE[5:4] == 2'b11) assign PACKAGE_PIN = outena_q ? (dout ? 1'bz : 1'b0) : 1'bz;
if (PIN_TYPE[5:4] == 2'b01) assign PACKAGEPIN = dout ? 1'bz : 1'b0;
if (PIN_TYPE[5:4] == 2'b10) assign PACKAGEPIN = OUTPUTENABLE ? (dout ? 1'bz : 1'b0) : 1'bz;
if (PIN_TYPE[5:4] == 2'b11) assign PACKAGEPIN = outena_q ? (dout ? 1'bz : 1'b0) : 1'bz;
endgenerate
`endif
endmodule