diff options
Diffstat (limited to 'usrp2')
| -rw-r--r-- | usrp2/top/u2_rev3/u2_rev3.v | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/usrp2/top/u2_rev3/u2_rev3.v b/usrp2/top/u2_rev3/u2_rev3.v index d5b382c19..4daa66212 100644 --- a/usrp2/top/u2_rev3/u2_rev3.v +++ b/usrp2/top/u2_rev3/u2_rev3.v @@ -203,9 +203,10 @@ module u2_rev3 reg [13:0] adc_a_reg1, adc_b_reg1, adc_a_reg2, adc_b_reg2; reg adc_ovf_a_reg1, adc_ovf_a_reg2, adc_ovf_b_reg1, adc_ovf_b_reg2; + // ADC A and B are swapped in schematic to facilitate clean layout always @(posedge dsp_clk) begin - adc_a_reg1 <= adc_b; // I and Q on RX are swapped in layout + adc_a_reg1 <= adc_b; adc_b_reg1 <= adc_a; adc_ovf_a_reg1 <= adc_ovf_b; adc_ovf_b_reg1 <= adc_ovf_a; @@ -327,8 +328,10 @@ module u2_rev3 end wire [15:0] dac_a_int, dac_b_int; - always @(negedge dsp_clk) dac_a <= dac_a_int; - always @(negedge dsp_clk) dac_b <= dac_b_int; + // DAC A and B are swapped in schematic to facilitate clean layout + // DAC A is also inverted in schematic to facilitate clean layout + always @(negedge dsp_clk) dac_a <= ~dac_b_int; + always @(negedge dsp_clk) dac_b <= dac_a_int; /* OFDDRRSE OFDDRRSE_serdes_inst |