diff options
Diffstat (limited to 'usrp2')
| -rw-r--r-- | usrp2/control_lib/settings_readback_bus_fifo_ctrl.v | 147 |
1 files changed, 107 insertions, 40 deletions
diff --git a/usrp2/control_lib/settings_readback_bus_fifo_ctrl.v b/usrp2/control_lib/settings_readback_bus_fifo_ctrl.v index 2e6ff1b15..6a2438280 100644 --- a/usrp2/control_lib/settings_readback_bus_fifo_ctrl.v +++ b/usrp2/control_lib/settings_readback_bus_fifo_ctrl.v @@ -76,70 +76,131 @@ module settings_readback_bus_fifo_ctrl wire writing = out_valid && out_ready; //state machine constants - localparam READ_HDR = 0; - localparam READ_DATA = 1; - localparam WAIT_EOF = 2; - localparam ACTION_EVENT = 3; - localparam WRITE_PROT_HDR = 4; - localparam WRITE_VRT_HDR = 5; - localparam WRITE_VRT_SID = 6; - localparam WRITE_VRT_TSF0 = 7; - localparam WRITE_VRT_TSF1 = 8; - localparam WRITE_RB_HDR = 9; - localparam WRITE_RB_DATA = 10; - - reg [3:0] state; + localparam READ_LINE0 = 0; + localparam VITA_HDR = 1; + localparam VITA_SID = 2; + localparam VITA_CID0 = 3; + localparam VITA_CID1 = 4; + localparam VITA_TSI = 5; + localparam VITA_TSF0 = 6; + localparam VITA_TSF1 = 7; + localparam READ_HDR = 8; + localparam READ_DATA = 9; + localparam WAIT_EOF = 10; + localparam ACTION_EVENT = 11; + localparam WRITE_PROT_HDR = 12; + localparam WRITE_VRT_HDR = 13; + localparam WRITE_VRT_SID = 14; + localparam WRITE_VRT_TSF0 = 15; + localparam WRITE_VRT_TSF1 = 16; + localparam WRITE_RB_HDR = 17; + localparam WRITE_RB_DATA = 18; + + reg [4:0] state; //holdover from current read inputs reg [31:0] in_data_reg, in_hdr_reg; wire [7:0] in_addr = in_hdr_reg[7:0]; - wire [7:0] do_poke = in_hdr_reg[8]; + wire do_poke = in_hdr_reg[8]; + reg [63:0] in_ticks_reg; + reg [3:0] in_seq_reg; + reg strobe_reg; + wire has_sid = in_data0[28]; + wire has_cid = in_data0[27]; + wire has_tsi = in_data0[23:22] != 0; + wire has_tsf = in_data0[21:20] != 0; + reg has_sid_reg, has_cid_reg, has_tsi_reg, has_tsf_reg; always @(posedge clock) begin if (reset) begin - state <= READ_HDR; - in_hdr_reg <= 0; - in_data_reg <= 0; + state <= READ_LINE0; end else begin case (state) - READ_HDR: begin + READ_LINE0: begin if (reading/* && in_data0[32]*/) begin - in_hdr_reg <= in_data0[31:0]; - state <= READ_DATA; + state <= VITA_HDR; end end - READ_DATA: begin + VITA_HDR: begin if (reading) begin - in_data_reg <= in_data0[31:0]; - state <= (in_data0[33])? ACTION_EVENT : WAIT_EOF; + if (has_sid) state <= VITA_SID; + else if (has_cid) state <= VITA_CID0; + else if (has_tsi) state <= VITA_TSI; + else if (has_tsf) state <= VITA_TSF0; + else state <= READ_HDR; end + in_seq_reg <= in_data0[19:16]; + has_sid_reg <= has_sid; + has_cid_reg <= has_cid; + has_tsi_reg <= has_tsi; + has_tsf_reg <= has_tsf; end - WAIT_EOF: begin + VITA_SID: begin + if (reading) begin + if (has_cid_reg) state <= VITA_CID0; + else if (has_tsi_reg) state <= VITA_TSI; + else if (has_tsf_reg) state <= VITA_TSF0; + else state <= READ_HDR; + end + end + + VITA_CID0: begin + if (reading) state <= VITA_CID1; + end + + VITA_CID1: begin + if (reading) begin + if (has_tsi_reg) state <= VITA_TSI; + else if (has_tsf_reg) state <= VITA_TSF0; + else state <= READ_HDR; + end + end + + VITA_TSI: begin if (reading) begin - if (in_data0[33]) begin - state <= ACTION_EVENT; - end + if (has_tsf_reg) state <= VITA_TSF0; + else state <= READ_HDR; end end + VITA_TSF0: begin + if (reading) state <= VITA_TSF1; + in_ticks_reg[63:32] <= in_data0; + end + + VITA_TSF1: begin + if (reading) state <= READ_HDR; + in_ticks_reg[31:0] <= in_data0; + end + + READ_HDR: begin + if (reading) state <= READ_DATA; + in_hdr_reg <= in_data0[31:0]; + end + + READ_DATA: begin + if (reading) state <= (in_data0[33])? ACTION_EVENT : WAIT_EOF; + in_data_reg <= in_data0[31:0]; + end + + WAIT_EOF: begin + if (reading && in_data0[33]) state <= ACTION_EVENT; + end + ACTION_EVENT: begin // poking and peeking happens here! state <= WRITE_PROT_HDR; end WRITE_RB_DATA: begin - if (writing) begin - state <= READ_HDR; - end + if (writing) state <= READ_LINE0; end default: begin - if (writing) begin - state <= state + 1; - end + if (writing) state <= state + 1; end endcase //state @@ -185,7 +246,7 @@ module settings_readback_bus_fifo_ctrl always @* begin case (state) WRITE_PROT_HDR: out_data_int <= prot_hdr; - WRITE_VRT_HDR: out_data_int <= {12'b010100000001, 4'b0/*seqno*/, 16'd6}; + WRITE_VRT_HDR: out_data_int <= {12'b010100000001, in_seq_reg, 16'd6}; WRITE_VRT_SID: out_data_int <= SID; WRITE_VRT_TSF0: out_data_int <= rb_time[63:32]; WRITE_VRT_TSF1: out_data_int <= rb_time[31:0]; @@ -206,16 +267,22 @@ module settings_readback_bus_fifo_ctrl assign out_data[31:0] = out_data_int; //assign to settings bus interface - assign strobe = (state == ACTION_EVENT) && do_poke; + assign strobe = strobe_reg; assign data = in_data_reg; assign addr = in_addr; + always @(posedge clock) begin + if (reset || state != ACTION_EVENT) strobe_reg <= 0; + else strobe_reg <= do_poke; + end + assign debug = { - state, - in_valid, in_ready, in_data[33:32], - in_valid0, in_ready0, in_data0[33:32], - out_valid, out_ready, out_data[33:32], - 16'b0 + state, strobe, do_poke, strobe_reg, //8 + addr, //8 + data[15:0] + //in_valid, in_ready, in_data[33:32], + //in_valid0, in_ready0, in_data0[33:32], + //out_valid, out_ready, out_data[33:32], }; endmodule //settings_readback_bus_fifo_ctrl |