Hi Nils Roos,
I have been use this code:
Code: Select all
always @(posedge adc_clk) begin
if (~adc_rstn) begin
dac_a <= 14'h0;
dac_b <= 14'h0;
end else begin
dac_a <= 14'h1234;
dac_b <= 14'h2345;
end
end
I use basic basic project from this link
http://redpitaya.com/examples-new/fpga- ... -tutorial/:
http://www.dropbox.com/s/j26fb3pmlfmttx ... e.zip?dl=1
I use vivado 2013.
without this modified redpitaya.xdc:
Code: Select all
set_property IOSTANDARD LVCMOS33 [get_ports {vinp_i[*]}]
set_property IOSTANDARD LVCMOS33 [get_ports {vinn_i[*]}]
I can generate bitstream. i load bit into my redpitaya/tmp and run red_pitaya_top.bit.
But i can not get response signal generator in DAC1.
If i change TMDS_33 into LVCMOS33, i got error when generate bitsream like this comment below:
ERROR: [Drc 23-20] Rule violation (IOSTDTYPE-1) IOStandard Type - I/O port vinn_i[0] is Differential but has an IOStandard of LVCMOS33 which can only support Single-Ended
ERROR: [Drc 23-20] Rule violation (IOSTDTYPE-1) IOStandard Type - I/O port vinn_i[1] is Differential but has an IOStandard of LVCMOS33 which can only support Single-Ended
ERROR: [Drc 23-20] Rule violation (IOSTDTYPE-1) IOStandard Type - I/O port vinn_i[2] is Differential but has an IOStandard of LVCMOS33 which can only support Single-Ended
ERROR: [Drc 23-20] Rule violation (IOSTDTYPE-1) IOStandard Type - I/O port vinn_i[3] is Differential but has an IOStandard of LVCMOS33 which can only support Single-Ended
ERROR: [Drc 23-20] Rule violation (IOSTDTYPE-1) IOStandard Type - I/O port vinn_i[4] is Differential but has an IOStandard of LVCMOS33 which can only support Single-Ended
ERROR: [Drc 23-20] Rule violation (IOSTDTYPE-1) IOStandard Type - I/O port vinp_i[0] is Differential but has an IOStandard of LVCMOS33 which can only support Single-Ended
ERROR: [Drc 23-20] Rule violation (IOSTDTYPE-1) IOStandard Type - I/O port vinp_i[1] is Differential but has an IOStandard of LVCMOS33 which can only support Single-Ended
ERROR: [Drc 23-20] Rule violation (IOSTDTYPE-1) IOStandard Type - I/O port vinp_i[2] is Differential but has an IOStandard of LVCMOS33 which can only support Single-Ended
ERROR: [Drc 23-20] Rule violation (IOSTDTYPE-1) IOStandard Type - I/O port vinp_i[3] is Differential but has an IOStandard of LVCMOS33 which can only support Single-Ended
ERROR: [Drc 23-20] Rule violation (IOSTDTYPE-1) IOStandard Type - I/O port vinp_i[4] is Differential but has an IOStandard of LVCMOS33 which can only support Single-Ended[/code]
Could you give me some advice, so i could figure out the issue.
Thanks