diff options
Diffstat (limited to 'control_lib/buffer_int.v')
| -rw-r--r-- | control_lib/buffer_int.v | 62 |
1 files changed, 61 insertions, 1 deletions
diff --git a/control_lib/buffer_int.v b/control_lib/buffer_int.v index e362d93f2..c33f2779d 100644 --- a/control_lib/buffer_int.v +++ b/control_lib/buffer_int.v @@ -131,6 +131,8 @@ module buffer_int WRITING : begin + if(wr_write_i) + addr_o <= addr_o + 1; // This was the timing problem, so now it doesn't depend on wr_error_i if(wr_error_i) begin state <= ERROR; @@ -141,7 +143,6 @@ module buffer_int if(wr_write_i) begin wr_ready_o <= 0; - addr_o <= addr_o + 1; if(addr_o == (lastline-1)) wr_full_o <= 1; if(addr_o == lastline) @@ -176,6 +177,65 @@ module buffer_int assign idle = (state == IDLE); endmodule // buffer_int + + +// These are 2 other ways for doing the WRITING state, both work. First one is faster, but confusing +/* + begin + // Gen 4 values -- state, wr_ready_o, addr_o, wr_full_o + if(~wr_error_i & wr_write_i & (addr_o == (lastline-1))) + wr_full_o <= 1; + if(wr_error_i | wr_write_i | wr_done_i) + wr_ready_o <= 0; + if(wr_error_i) + state <= ERROR; + else if(wr_done_i | (wr_write_i & (addr_o == lastline))) + state <= DONE; + // This one was the timing problem... now we increment addr_o even if there is an error + if(wr_write_i) + addr_o <= addr_o + 1; + end // case: WRITING +*/ + +/* begin + if(wr_error_i) + begin + state <= ERROR; + wr_ready_o <= 0; + end + else + begin + if(wr_write_i) + begin + wr_ready_o <= 0; + addr_o <= addr_o + 1; + if(addr_o == (lastline-1)) + wr_full_o <= 1; + if(addr_o == lastline) + state <= DONE; + end + if(wr_done_i) + begin + state <= DONE; + wr_ready_o <= 0; + end + end // else: !if(wr_error_i) + end // case: WRITING +*/ + + + + + + + + + + + + + + // Unused old code //assign rd_empty_o = (state != READING); // && (state != PRE_READ); //assign rd_empty_o = rd_empty_reg; // timing fix? |