Re: AD9361 AC701 no-os customized for CMOS mode

Istvan,

I made this change in the dac_init function in dac_core.c to set the register to a value of 1 instead of 3, but this did not change the functionality of the dac_valid signal.  I hardcoded dac_datarate_s to a value of 1 (in the axi_ad9361_tx.v file) and this DID result in a pulsed version of the dac_valid signal.

// rate counters and data sync signals  always @(posedge dac_clk) begin    if ((dac_data_sync == 1'b1) || (dac_rate_cnt == 8'd0)) begin      dac_rate_cnt <= dac_datarate_s;    end else begin      dac_rate_cnt <= dac_rate_cnt - 1'b1;    end  end  assign dac_datarate_s = 1;  // dma interface  always @(posedge dac_clk) begin    dac_valid <= (dac_rate_cnt == 8'd0) ? 1'b1 : 1'b0;    dac_valid_i0 <= dac_valid;    dac_valid_q0 <= dac_valid;    dac_valid_i1 <= dac_valid & ~dac_r1_mode;    dac_valid_q1 <= dac_valid & ~dac_r1_mode;  end

This lead me to believe that the register in the axi_ad9361 core is not being updated properly.  I added some custom code to the dac_init function to check the value being loaded into the register as seen below.  The console window output is also included.

int drate = 99;
 int *pdrate = &drate;
 printf("*pdrate after initialization = %d\n",*pdrate);

// original code
 //dac_write(phy, DAC_REG_RATECNTRL, DAC_RATE(3));

// begin: custom code
 dac_read(phy, DAC_REG_RATECNTRL, (uint32_t *)pdrate);
 printf("DAC_REG_RATECNTRL Originally = %d\n",*pdrate);
 dac_write(phy, DAC_REG_RATECNTRL, DAC_RATE(1)); // (updated per Csoml on Analog Devices engineering zone support)
 dac_read(phy, DAC_REG_RATECNTRL, (uint32_t *)pdrate);
 printf("DAC_REG_RATECNTRL After Update = %d\n",(int)*pdrate);
 // end: custom code

Console output

*pdrate after initialization = 99

DAC_REG_RATECNTRL Originally = 0

DAC_REG_RATECNTRL After Update = 0

I also checked the memory location using the SDK and it is never being updated to 1. It remains at 00 after the dac_write() command. Since the dac_write() simply calls the Xil_Out32() function, what would cause this function to not work?

I am not sure if this is related, but I also notice that the digital tuning process fails  as indicated by the console output "ad9361_dig_tune: Tuning RX FAILED!"

Regards,

Nick