diff options
Diffstat (limited to 'usrp2')
| -rw-r--r-- | usrp2/gpmc/gpmc_to_fifo_async.v | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/usrp2/gpmc/gpmc_to_fifo_async.v b/usrp2/gpmc/gpmc_to_fifo_async.v index a8068022f..1df93f910 100644 --- a/usrp2/gpmc/gpmc_to_fifo_async.v +++ b/usrp2/gpmc/gpmc_to_fifo_async.v @@ -1,12 +1,12 @@ module gpmc_to_fifo_async - (input [15:0] EM_D, input [1:0] EM_NBE, - input EM_NCS, input EM_NWE, + (input [15:0] EM_D, input [1:0] EM_NBE, input EM_NCS, input EM_NWE, input fifo_clk, input fifo_rst, output reg [17:0] data_o, output reg src_rdy_o, input dst_rdy_i, - input [15:0] frame_len, input [15:0] fifo_space, output fifo_ready); + input [15:0] frame_len, input [15:0] fifo_space, output fifo_ready, + output reg bus_error ); reg [10:0] counter; // Synchronize the async control signals @@ -54,5 +54,11 @@ module gpmc_to_fifo_async counter <= counter + 1; assign fifo_ready = first_write & (fifo_space > frame_len); + + always @(posedge fifo_clk) + if(fifo_rst) + bus_error <= 0; + else if(src_rdy_o & ~dst_rdy_i) + bus_error <= 1; endmodule // gpmc_to_fifo_async |