diff options
Diffstat (limited to 'fpga/usrp2/control_lib')
| -rw-r--r-- | fpga/usrp2/control_lib/atr_controller.v | 7 | ||||
| -rw-r--r-- | fpga/usrp2/control_lib/atr_controller16.v | 7 |
2 files changed, 10 insertions, 4 deletions
diff --git a/fpga/usrp2/control_lib/atr_controller.v b/fpga/usrp2/control_lib/atr_controller.v index 2cef8ba2b..ee8b260c5 100644 --- a/fpga/usrp2/control_lib/atr_controller.v +++ b/fpga/usrp2/control_lib/atr_controller.v @@ -44,8 +44,11 @@ module atr_controller atr_ram[adr_i[5:2]][7:0] <= dat_i[7:0]; end // if (we_i & stb_i & cyc_i) - always @(posedge clk_i) - dat_o <= atr_ram[adr_i[5:2]]; + // Removing readback allows ram to be synthesized as LUTs instead of regs + //always @(posedge clk_i) + // dat_o <= atr_ram[adr_i[5:2]]; + always + dat_o <= 32'd0; always @(posedge clk_i) ack_o <= stb_i & cyc_i & ~ack_o; diff --git a/fpga/usrp2/control_lib/atr_controller16.v b/fpga/usrp2/control_lib/atr_controller16.v index ff4f634c7..727f8c630 100644 --- a/fpga/usrp2/control_lib/atr_controller16.v +++ b/fpga/usrp2/control_lib/atr_controller16.v @@ -47,8 +47,11 @@ module atr_controller16 atr_ram[adr_i[5:2]][7:0] <= dat_i[7:0]; end // if (we_i & stb_i & cyc_i) - always @(posedge clk_i) - dat_o <= adr_i[1] ? atr_ram[adr_i[5:2]][31:16] : atr_ram[adr_i[5:2]][15:0]; + // Removing readback allows ram to be synthesized as LUTs instead of regs + //always @(posedge clk_i) + // dat_o <= adr_i[1] ? atr_ram[adr_i[5:2]][31:16] : atr_ram[adr_i[5:2]][15:0]; + always + dat_o <= 16'd0; always @(posedge clk_i) ack_o <= stb_i & cyc_i & ~ack_o; |