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firmware: fixed short circuit during RX

pull/197/head
matteo serva 2024-03-14 11:54:30 +01:00
rodzic c30f2ef911
commit bb3cd45dd2
1 zmienionych plików z 13 dodań i 67 usunięć
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80
firmware/top.v
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@ -493,6 +493,7 @@ module top (
wire w_smi_read_req;
wire w_smi_write_req;
wire w_smi_data_direction;
wire w_smi_data_output_enable;
// the "Writing" flag indicates that the data[7:0] direction (inout)
// from the FPGA's SMI module should be "output". This happens when the
@ -501,78 +502,23 @@ module top (
// the data is high-z, which is the more "recessive" mode
assign w_smi_data_direction = i_smi_a2;
assign w_smi_data_output_enable = i_smi_a2 & !i_smi_soe_se;
genvar k;
generate
for (k=0; k<8;k++) begin
SB_IO #(
.PIN_TYPE(6'b1010_01),
.PULLUP (1'b0)
) smi_io0 (
.PACKAGE_PIN(io_smi_data[0]),
.OUTPUT_ENABLE(w_smi_data_direction),
.D_OUT_0(w_smi_data_output[0]),
.D_IN_0(w_smi_data_input[0])
);
SB_IO #(
.PIN_TYPE(6'b1010_01),
.PULLUP (1'b0)
) smi_io1 (
.PACKAGE_PIN(io_smi_data[1]),
.OUTPUT_ENABLE(w_smi_data_direction),
.D_OUT_0(w_smi_data_output[1]),
.D_IN_0(w_smi_data_input[1])
);
SB_IO #(
.PIN_TYPE(6'b1010_01),
.PULLUP (1'b0)
) smi_io2 (
.PACKAGE_PIN(io_smi_data[2]),
.OUTPUT_ENABLE(w_smi_data_direction),
.D_OUT_0(w_smi_data_output[2]),
.D_IN_0(w_smi_data_input[2])
);
SB_IO #(
.PIN_TYPE(6'b1010_01),
.PULLUP (1'b0)
) smi_io3 (
.PACKAGE_PIN(io_smi_data[3]),
.OUTPUT_ENABLE(w_smi_data_direction),
.D_OUT_0(w_smi_data_output[3]),
.D_IN_0(w_smi_data_input[3])
);
SB_IO #(
.PIN_TYPE(6'b1010_01),
.PULLUP (1'b0)
) smi_io4 (
.PACKAGE_PIN(io_smi_data[4]),
.OUTPUT_ENABLE(w_smi_data_direction),
.D_OUT_0(w_smi_data_output[4]),
.D_IN_0(w_smi_data_input[4])
);
SB_IO #(
.PIN_TYPE(6'b1010_01),
.PULLUP (1'b0)
) smi_io5 (
.PACKAGE_PIN(io_smi_data[5]),
.OUTPUT_ENABLE(w_smi_data_direction),
.D_OUT_0(w_smi_data_output[5]),
.D_IN_0(w_smi_data_input[5])
);
SB_IO #(
.PIN_TYPE(6'b1010_01),
.PULLUP (1'b0)
) smi_io6 (
.PACKAGE_PIN(io_smi_data[6]),
.OUTPUT_ENABLE(w_smi_data_direction),
.D_OUT_0(w_smi_data_output[6]),
.D_IN_0(w_smi_data_input[6])
);
SB_IO #(
.PIN_TYPE(6'b1010_01),
.PULLUP (1'b0)
) smi_io7 (
.PACKAGE_PIN(io_smi_data[7]),
.OUTPUT_ENABLE(w_smi_data_direction),
.D_OUT_0(w_smi_data_output[7]),
.D_IN_0(w_smi_data_input[7])
.PACKAGE_PIN(io_smi_data[k]),
.OUTPUT_ENABLE(w_smi_data_output_enable),
.D_OUT_0(w_smi_data_output[k]),
.D_IN_0(w_smi_data_input[k])
);
end
endgenerate
// We need the 'o_smi_write_req' to be 1 only when the direction is TX
// (w_smi_data_direction == 0) and the write fifo is not full