changed sensor/sensor_i2c.v: working spi read mask 0x9100

    reg     spi_wr_fifo_en;

    reg     spi_pre_wr_fifo_en;

`endif    

    always @ (posedge mclk) begin

        if      (spi_wr_fifo_en)  spi_wr_fifo_en <= 1'b0; 

        if      (mrst)  begin      

            spi_wr_fifo_en <= 1'b0;

            spi_pre_wr_fifo_en <= 1'b0;

            end 

        else if (spi_rd_en)    spi_pre_wr_fifo_en <= 1'b1;

        else if (spi_ready && spi_pre_wr_fifo_en)  begin  spi_pre_wr_fifo_en <= 1'b0; spi_wr_fifo_en <= 1'b1; end

    end

    fifo_same_clock #(

        .DATA_WIDTH(8),

        .DATA_DEPTH(4)

    ) fifo_same_clock_spi_rdata_i (

        .rst        (1'b0),             // input

        .clk        (mclk),            // input

        .sync_rst   (mrst),            // input

        .we         (spi_wr_fifo_en),      // input

        .re         (i2c_fifo_rd),     // input

        .data_in    (data_from_spi),       // input[7:0] 

        .data_out   (i2c_fifo_dout),   // output[7:0] 

        .nempty     (i2c_fifo_nempty), // output

        .half_full  () // output reg 

    );

`else

    fifo_same_clock #(

        .DATA_WIDTH(8),

        .half_full  () // output reg 

    );

`endif    

    always @ (posedge mclk) begin