Due to a problem with the Intel® Stratix® 10 Interlaken (2nd Generation) Intel® FPGA IP Example Design Packet Transfer mode pattern generator may generate incorrect payload data if the signal itx_ready deasserts during the last packet transfer (i.e. packet 100).
Device Family: Intel® Stratix® 10, Intel® Stratix® 10 GX, Intel® Stratix® 10 MX, Intel® Stratix® 10 PX, Intel® Stratix® 10 SX, Intel® Stratix® 10 TX
Intel Software: Quartus Prime Pro
Type: Answers, Errata
Area: Intellectual Property
Last Modified: June 14, 2019
Version Found: v19.1
Bug ID: 1507266551
IP: Interlaken IP Core (2nd Generation)
Why does the Intel® Stratix® 10 Interlaken (2nd Generation) Intel® FPGA IP Example Design fail in non-continuous mode (Transfer Mode selection set to packet)?
Description
Workaround/Fix
To work around this problem using Intel® Quartus® Prime v19.1 modify the files "ilk_pkt_gen.sv" and "ilk_pkt_gen_mseg.sv" found in the folder /<your example design>/example_design_s10/rtl/as shown below.
This problem is scheduled to be fixed in a future release of the Intel® Quartus® Prime Pro Software.
ilk_pkt_gen.sv
Change From:
always @(posedge clk) begin
if (tx_usr_srst_r[0]) begin
stop_pkt <= 1'b0;
end else if (pkt_cnt == 7'd100 && !continuous_pkt ) begin
// end else if (pkt_cnt[6] & pkt_cnt[5] & pkt_cnt[2]) begin
stop_pkt <= 1'b1;
end
end
Change To:
always @(posedge clk) begin
if (tx_usr_srst_r[0]) begin
stop_pkt <= 1'b0;
end else if (pkt_cnt == 7'd100 && !continuous_pkt && tx_eopbits_nxt[3]) begin
// end else if (pkt_cnt[6] & pkt_cnt[5] & pkt_cnt[2]) begin
stop_pkt <= 1'b1;
end
end
ilk_pkt_gen_mseg.sv
Change From:
always @(posedge clk) begin
if (tx_usr_srst_r[0]) begin
stop_pkt <= 1'b0;
end else if (pkt_cnt_sop == 7'd100 && !continuous_pkt ) begin
// end else if (pt_cnt[6] & pkt_cnt[5] & pkt_cnt[2]) begin
stop_pkt <= 1'b1;
end
end
Change To:
always @(posedge clk) begin
if (tx_usr_srst_r[0]) begin
stop_pkt <= 1'b0;
end else if (pkt_cnt_sop == 7'd100 && !continuous_pkt && (state == ST_C3) && tx_ready) begin
// end else if (pkt_cnt[6] & pkt_cnt[5] & pkt_cnt[2]) begin
stop_pkt <= 1'b1;
end
end