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Branch : Quicklogic : Issue in the top_bit.v, driving a output ASSP port #1455

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rakeshm75 opened this issue Apr 29, 2020 · 3 comments
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@rakeshm75
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Output port of the ASSP macro instance is tied to 0. WBs_ADR is a ASSP output port which is an input to the FPGA, it cannot be driven from the FPGA (cannot be tied to 0).

.WBs_ADR({1'b0, 1'b0, TILE_X1Y1_WBs_ADR[2], TILE_X1Y1_WBs_ADR[3], TILE_X1Y1_WBs_ADR[4], TILE_X1Y1_WBs_ADR[5], TILE_X1Y1_WBs_ADR[6], TILE_X1Y1_WBs_ADR[7], TILE_X1Y1_WBs_ADR[8], TILE_X1Y1_WBs_ADR[9], TILE_X1Y1_WBs_ADR[10], TILE_X1Y1_WBs_ADR[11], TILE_X1Y1_WBs_ADR[12], TILE_X1Y1_WBs_ADR[13], TILE_X1Y1_WBs_ADR[14], TILE_X1Y1_WBs_ADR[15], TILE_X1Y1_WBs_ADR[16]}),

Attached the top_bit.v, file here.

design3_bit_v.zip

@rakeshm75
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With the latest code the vector signal mapping is correct but still an output port of the ASSP is tied to 0. WBs_ADR is a ASSP output port which is an input to the FPGA, it cannot be driven from the FPGA (cannot be tied to 0).

.WBs_ADR({TILE_X1Y1_WBs_ADR[16], TILE_X1Y1_WBs_ADR[15], TILE_X1Y1_WBs_ADR[14], TILE_X1Y1_WBs_ADR[13], TILE_X1Y1_WBs_ADR[12], TILE_X1Y1_WBs_ADR[11], TILE_X1Y1_WBs_ADR[10], TILE_X1Y1_WBs_ADR[9], TILE_X1Y1_WBs_ADR[8], TILE_X1Y1_WBs_ADR[7], TILE_X1Y1_WBs_ADR[6], TILE_X1Y1_WBs_ADR[5], TILE_X1Y1_WBs_ADR[4], TILE_X1Y1_WBs_ADR[3], TILE_X1Y1_WBs_ADR[2], 1'b0, 1'b0}),

@kgugala
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kgugala commented May 13, 2020

This one is fixed

@rakeshm75
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@kgugala, Yes, now the output port is not driven by the IP, but it is still wrong as TILE_X1Y1_WBs_ADR[16:2] is tied to WBs_ADR [16:0].
Ideally it should be .WBs_ADR(TILE_X1Y1_WBs_ADR[16:0]) and not
.WBs_ADR(TILE_X1Y1_WBs_ADR[16:2])
as now the addresses are tied wrongly, WBs_ADR[14:0] to TILE_X1Y1_WBs_ADR[16:2]

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