diff options
Diffstat (limited to 'control_lib/newfifo/ll8_to_fifo19.v')
-rw-r--r-- | control_lib/newfifo/ll8_to_fifo19.v | 73 |
1 files changed, 0 insertions, 73 deletions
diff --git a/control_lib/newfifo/ll8_to_fifo19.v b/control_lib/newfifo/ll8_to_fifo19.v deleted file mode 100644 index af3b91afb..000000000 --- a/control_lib/newfifo/ll8_to_fifo19.v +++ /dev/null @@ -1,73 +0,0 @@ - -module ll8_to_fifo19 - (input clk, input reset, input clear, - input [7:0] ll_data, - input ll_sof_n, - input ll_eof_n, - input ll_src_rdy_n, - output ll_dst_rdy_n, - - output [18:0] f19_data, - output f19_src_rdy_o, - input f19_dst_rdy_i ); - - localparam XFER_EMPTY = 0; - localparam XFER_HALF = 1; - localparam XFER_HALF_WRITE = 3; - - // Why anybody would use active low in an FPGA is beyond me... - wire ll_sof = ~ll_sof_n; - wire ll_eof = ~ll_eof_n; - wire ll_src_rdy = ~ll_src_rdy_n; - wire ll_dst_rdy; - assign ll_dst_rdy_n = ~ll_dst_rdy; - - wire xfer_out = f19_src_rdy_o & f19_dst_rdy_i; - wire xfer_in = ll_src_rdy & ll_dst_rdy; - - reg hold_sof; - wire f19_sof, f19_eof, f19_occ; - - reg [1:0] state; - reg [7:0] hold_reg; - - always @(posedge clk) - if(ll_src_rdy & (state==XFER_EMPTY)) - hold_reg <= ll_data; - - always @(posedge clk) - if(ll_sof & (state==XFER_EMPTY)) - hold_sof <= 1; - else if(xfer_out) - hold_sof <= 0; - - always @(posedge clk) - if(reset | clear) - state <= XFER_EMPTY; - else - case(state) - XFER_EMPTY : - if(ll_src_rdy) - if(ll_eof) - state <= XFER_HALF_WRITE; - else - state <= XFER_HALF; - XFER_HALF : - if(ll_src_rdy & f19_dst_rdy_i) - state <= XFER_EMPTY; - XFER_HALF_WRITE : - if(f19_dst_rdy_i) - state <= XFER_EMPTY; - endcase // case (state) - - assign ll_dst_rdy = (state==XFER_EMPTY) | ((state==XFER_HALF)&f19_dst_rdy_i); - assign f19_src_rdy_o = (state==XFER_HALF_WRITE) | ((state==XFER_HALF)&ll_src_rdy); - - assign f19_sof = hold_sof | (ll_sof & (state==XFER_HALF)); - assign f19_eof = (state == XFER_HALF_WRITE) | ll_eof; - assign f19_occ = (state == XFER_HALF_WRITE); - - assign f19_data = {f19_occ,f19_eof,f19_sof,hold_reg,ll_data}; - -endmodule // ll8_to_fifo19 - |