Corrected extfifo code so that all registers that are on SRAM signals are packed into IOBs

Explcit drives and skews added to GPIO pins

Corrected minor error in FIFO logic that showed data avail internally incorrectly

2 files changed, 42 insertions, 37 deletions

diff --git a/usrp2/top/u2_rev3/u2_core_udp.v b/usrp2/top/u2_rev3/u2_core_udp.v
index f8ea5330b..38c840bc1 100644
--- a/usrp2/top/u2_rev3/u2_core_udp.v
+++ b/usrp2/top/u2_rev3/u2_core_udp.v
@@ -171,7 +171,7 @@ module u2_core
    wire [31:0] 	atr_lines;
 
    wire [31:0] 	debug_rx, debug_mac, debug_mac0, debug_mac1, debug_tx_dsp, debug_txc,
-		debug_serdes0, debug_serdes1, debug_serdes2, debug_rx_dsp, debug_udp, debug_extfifo;
+		debug_serdes0, debug_serdes1, debug_serdes2, debug_rx_dsp, debug_udp, debug_extfifo, debug_extfifo2;
 
    wire [15:0] 	ser_rx_occ, ser_tx_occ, dsp_rx_occ, dsp_tx_occ, eth_rx_occ, eth_tx_occ, eth_rx_occ2;
    wire 	ser_rx_full, ser_tx_full, dsp_rx_full, dsp_tx_full, eth_rx_full, eth_tx_full, eth_rx_full2;
@@ -414,7 +414,7 @@ module u2_core
 		 .cyc_i(s4_cyc),.stb_i(s4_stb),.adr_i(s4_adr[3:0]),.we_i(s4_we),
 		 .dat_i(s4_dat_o),.dat_o(s4_dat_i),.ack_o(s4_ack),
 		 .atr(atr_lines),.debug_0(debug_gpio_0),.debug_1(debug_gpio_1),
-		 .gpio( {io_tx,io_rx} ) );
+		 .gpio(/* {io_tx,io_rx}*/ ) );
 
    // /////////////////////////////////////////////////////////////////////////
    // Buffer Pool Status -- Slave #5   
@@ -664,13 +664,16 @@ module u2_core
 	.RAM_LDn(RAM_LDn),
 	.RAM_OEn(RAM_OEn),
 	.RAM_CE1n(RAM_CE1n),
-	.datain({rd1_flags,rd1_dat}),
+//	.datain({rd1_flags,rd1_dat}),
+	.datain({rd1_flags[3:2],rd1_dat[31:16],rd1_flags[1:0],rd1_dat[15:0]}),
 	.src_rdy_i(rd1_ready_o),               // WRITE
 	.dst_rdy_o(rd1_ready_i),               // not FULL
-	.dataout(tx_data),
+//	.dataout(tx_data),
+	.dataout({tx_data[35:34],tx_data[31:16],tx_data[33:32],tx_data[15:0]}),
 	.src_rdy_o(tx_src_rdy),               // not EMPTY
 	.dst_rdy_i(tx_dst_rdy),
-	.debug(debug_extfifo)
+	.debug(debug_extfifo),
+	.debug2(debug_extfifo2)
 	);
 
    vita_tx_chain #(.BASE_CTRL(SR_TX_CTRL), .BASE_DSP(SR_TX_DSP), 
@@ -717,5 +720,7 @@ module u2_core
    assign debug = debug_extfifo;
    assign debug_gpio_0 = 32'd0;
    assign debug_gpio_1 = 32'd0;
+   assign {io_tx,io_rx} = debug_extfifo2;
+
    
 endmodule // u2_core
diff --git a/usrp2/top/u2_rev3/u2_rev3.ucf b/usrp2/top/u2_rev3/u2_rev3.ucf
index 82d879446..bf9569fe4 100644
--- a/usrp2/top/u2_rev3/u2_rev3.ucf
+++ b/usrp2/top/u2_rev3/u2_rev3.ucf
@@ -264,22 +264,22 @@ NET "sdi_tx_adc"  LOC = "J4"  ;
 NET "sen_tx_dac"  LOC = "H4"  ; 
 NET "sclk_tx_dac"  LOC = "J5"  ; 
 NET "sdi_tx_dac"  LOC = "J6"  ; 
-NET "io_tx[0]"  LOC = "K4"  ;
-NET "io_tx[1]"  LOC = "K3"  ;
-NET "io_tx[2]"  LOC = "G1"  ;
-NET "io_tx[3]"  LOC = "G5"  ;
-NET "io_tx[4]"  LOC = "H5"  ;
-NET "io_tx[5]"  LOC = "F3"  ;
-NET "io_tx[6]"  LOC = "F2"  ;
-NET "io_tx[7]"  LOC = "F5"  ;
-NET "io_tx[8]"  LOC = "G6"  ;
-NET "io_tx[9]"  LOC = "E2"  ;
-NET "io_tx[10]"  LOC = "E1"  ;
-NET "io_tx[11]"  LOC = "E3"  ;
-NET "io_tx[12]"  LOC = "F4"  ;
-NET "io_tx[13]"  LOC = "D2"  ;
-NET "io_tx[14]"  LOC = "D4"  ;
-NET "io_tx[15]"  LOC = "E4"  ;
+NET "io_tx[0]"  LOC = "K4"   |DRIVE = 12  |SLEW = FAST ;
+NET "io_tx[1]"  LOC = "K3"   |DRIVE = 12  |SLEW = FAST ;
+NET "io_tx[2]"  LOC = "G1"   |DRIVE = 12  |SLEW = FAST ;
+NET "io_tx[3]"  LOC = "G5"   |DRIVE = 12  |SLEW = FAST ;
+NET "io_tx[4]"  LOC = "H5"   |DRIVE = 12  |SLEW = FAST ;
+NET "io_tx[5]"  LOC = "F3"   |DRIVE = 12  |SLEW = FAST ;
+NET "io_tx[6]"  LOC = "F2"   |DRIVE = 12  |SLEW = FAST ;
+NET "io_tx[7]"  LOC = "F5"   |DRIVE = 12  |SLEW = FAST ;
+NET "io_tx[8]"  LOC = "G6"   |DRIVE = 12  |SLEW = FAST ;
+NET "io_tx[9]"  LOC = "E2"   |DRIVE = 12  |SLEW = FAST ;
+NET "io_tx[10]"  LOC = "E1"   |DRIVE = 12  |SLEW = FAST ;
+NET "io_tx[11]"  LOC = "E3"   |DRIVE = 12  |SLEW = FAST ;
+NET "io_tx[12]"  LOC = "F4"   |DRIVE = 12  |SLEW = FAST ;
+NET "io_tx[13]"  LOC = "D2"   |DRIVE = 12  |SLEW = FAST ;
+NET "io_tx[14]"  LOC = "D4"   |DRIVE = 12  |SLEW = FAST ;
+NET "io_tx[15]"  LOC = "E4"   |DRIVE = 12  |SLEW = FAST ;
 NET "sen_rx_db"  LOC = "D22"  ; 
 NET "sclk_rx_db"  LOC = "F19"  ; 
 NET "sdo_rx_db"  LOC = "G20"  ; 
@@ -291,22 +291,22 @@ NET "sdi_rx_adc"  LOC = "H22"  ;
 NET "sen_rx_dac"  LOC = "J18"  ; 
 NET "sclk_rx_dac"  LOC = "J19"  ; 
 NET "sdi_rx_dac"  LOC = "J21"  ; 
-NET "io_rx[0]"  LOC = "L21"  ;
-NET "io_rx[1]"  LOC = "L20"  ;
-NET "io_rx[2]"  LOC = "L19"  ;
-NET "io_rx[3]"  LOC = "L18"  ;
-NET "io_rx[4]"  LOC = "L17"  ;
-NET "io_rx[5]"  LOC = "K22"  ;
-NET "io_rx[6]"  LOC = "K21"  ;
-NET "io_rx[7]"  LOC = "K20"  ;
-NET "io_rx[8]"  LOC = "G22"  ;
-NET "io_rx[9]"  LOC = "G21"  ;
-NET "io_rx[10]"  LOC = "F21"  ;
-NET "io_rx[11]"  LOC = "F20"  ;
-NET "io_rx[12]"  LOC = "G19"  ;
-NET "io_rx[13]"  LOC = "G18"  ;
-NET "io_rx[14]"  LOC = "G17"  ;
-NET "io_rx[15]"  LOC = "E22"  ;
+NET "io_rx[0]"  LOC = "L21"   |DRIVE = 12  |SLEW = FAST ;
+NET "io_rx[1]"  LOC = "L20"   |DRIVE = 12  |SLEW = FAST ;
+NET "io_rx[2]"  LOC = "L19"   |DRIVE = 12  |SLEW = FAST ;
+NET "io_rx[3]"  LOC = "L18"   |DRIVE = 12  |SLEW = FAST ;
+NET "io_rx[4]"  LOC = "L17"   |DRIVE = 12  |SLEW = FAST ;
+NET "io_rx[5]"  LOC = "K22"   |DRIVE = 12  |SLEW = FAST ;
+NET "io_rx[6]"  LOC = "K21"   |DRIVE = 12  |SLEW = FAST ;
+NET "io_rx[7]"  LOC = "K20"   |DRIVE = 12  |SLEW = FAST ;
+NET "io_rx[8]"  LOC = "G22"   |DRIVE = 12  |SLEW = FAST ;
+NET "io_rx[9]"  LOC = "G21"   |DRIVE = 12  |SLEW = FAST ;
+NET "io_rx[10]"  LOC = "F21"   |DRIVE = 12  |SLEW = FAST ;
+NET "io_rx[11]"  LOC = "F20"   |DRIVE = 12  |SLEW = FAST ;
+NET "io_rx[12]"  LOC = "G19"   |DRIVE = 12  |SLEW = FAST ;
+NET "io_rx[13]"  LOC = "G18"   |DRIVE = 12  |SLEW = FAST ;
+NET "io_rx[14]"  LOC = "G17"   |DRIVE = 12  |SLEW = FAST ;
+NET "io_rx[15]"  LOC = "E22"   |DRIVE = 12  |SLEW = FAST ;
 
 NET "clk_to_mac" TNM_NET = "clk_to_mac";
 TIMESPEC "TS_clk_to_mac" = PERIOD "clk_to_mac" 8 ns HIGH 50 %;