For my hobby projects I learning zynq processor system.
I have RedPitaya board 122.88-16 model. For my task needs dac. I use axis_red_pitaya_dac_v2_0 ip core from Pavel Demin and this core works great with with my board when i send in data_in(s_axis_tdata) signal from generator or binary counter. On display my oscilloscope i see periodical signal. However when i send to data in constants from ip core or from gpio port i see on oscilloscope display one short pulse but I wont to see change output voltage level.
Also also i tried change verilog code of axis_red_pitaya_dac_v2_0 so that in out sends constant output level:
Code: Select all
//assign int_dat_a_wire = s_axis_tdata[DAC_DATA_WIDTH-1:0]; //assign int_dat_b_wire = s_axis_tdata[AXIS_TDATA_WIDTH/2+DAC_DATA_WIDTH-1:AXIS_TDATA_WIDTH/2]; assign int_dat_a_wire = $signed(7000); // 14'b01111111111111 assign int_dat_b_wire = $signed(5000); // 14'b01111111111111
Please tell me what possible problem there might be. Perhaps this is somehow related to ODDR?