# ZCU208 and usp\_rf\_data\_converter

**URL:** <https://discuss.pynq.io/t/zcu208-and-usp-rf-data-converter/5218>\
**Category:** Support\
**Created:** [February 11, 2023, 9:51pm UTC](https://discuss.pynq.io/t/zcu208-and-usp-rf-data-converter/5218 "2023-02-11T21:51:17Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![jramsey123](https://avatars.discourse-cdn.com/v4/letter/j/bbce88/32.png) [@jramsey123](https://discuss.pynq.io/u/jramsey123)\
**Post date:** [February 11, 2023, 9:51pm UTC](https://discuss.pynq.io/t/zcu208-and-usp-rf-data-converter/5218/1 "2023-02-11T21:51:17Z")

</div>

Regarding the recent PYNQ ZCU208 build that’s available on github, we have a need to have the usp\_rf\_data\_converter appear in the PetaLinux device tree. Currently, when PYNQ 3.0.1 boots, the usp\_rf\_data\_converter does not appear in the device tree. In order to use the APIs in the libxrfdc.so library directly (e.g. from C), the usp\_rf\_data\_converter device needs to appear in /sys/bus/platform/devices. Can I just edit the .dtsi file in github (/ZCU208/petalinux\_bps/meta-user/recipes-bsp/device-tree/files/system-user.dtsi), add the usp\_rf\_data\_converter and rebuild Petalinux? The petalinux-config files aren’t in github (it would be nice if they were), so I can’t start from there. The usp\_rf\_data\_converter entry in the user.dtsi file would look something like this:

> ```
> usp_rf_data_converter: usp_rf_data_converter@80000000 {
> clock-names = "s_axi_aclk", "m2_axis_aclk", "s0_axis_aclk";
> clocks = <&zynqmp_clk 71>, <&misc_clk_0>, <&misc_clk_1>;
> compatible = "xlnx,usp-rf-data-converter-2.6";
> interrupt-names = "irq";
> interrupt-parent = <&gic>;
> interrupts = <0 89 4>;
> num-insts = <0x1>;
> param-list = [00 00 00 00 00 00 00 80 00 00 00 00 01 00 00 00 00 00 00 00 00 00 00 00 01 00 00 00 01 00 00 00 02 00 00 00 01 00 00 00 01 00 00 00 01 00 00 00 00 00 00 00 00 00 22 40 00 00 00 00 00 c0 62 40 00 00 00 00 00 94 81 40 3c 00 00 00 01 00 00 00 01 00 00 00 00 00 00 00 00 00 00 00 00 00 24 40 02 00 00 00 00 00 00 00 01 00 00 00 01 00 00 00 02 00 00 00 01 00 00 00 00 00 00 00 00 00 00 00 02 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 02 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 02 00 00 00 00 00 00 00 00 00 00 00 10 00 00 00 01 00 00 00 00 00 00 00 00 00 00 00 01 00 00 00 00 00 00 00 10 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 03 00 00 00 00 00 00 00 10 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 03 00 00 00 00 00 00 00 10 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 03 00 00 00 00 00 00 00 00 00 00 00 9a 99 99 99 99 99 19 40 00 00 00 00 00 00 b9 40 00 00 00 00 00 00 00 00 0a 00 00 00 01 00 00 00 01 00 00 00 00 00 00 00 00 00 00 00 00 00 24 40 02 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 02 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 02 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 02 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 02 00 00 00 00 00 00 00 00 00 00 00 10 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 03 00 00 00 00 00 00 00 10 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 03 00 00 00 00 00 00 00 10 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 03 00 00 00 00 00 00 00 10 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 03 00 00 00 00 00 00 00 00 00 00 00 9a 99 99 99 99 99 19 40 00 00 00 00 00 00 b9 40 00 00 00 00 00 00 00 00 0a 00 00 00 01 00 00 00 01 00 00 00 00 00 00 00 00 00 00 00 00 00 24 40 02 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 02 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 02 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 02 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 02 00 00 00 00 00 00 00 00 00 00 00 10 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 03 00 00 00 00 00 00 00 10 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 03 00 00 00 00 00 00 00 10 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 03 00 00 00 00 00 00 00 10 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 03 00 00 00 00 00 00 00 00 00 00 00 9a 99 99 99 99 99 19 40 00 00 00 00 00 00 b9 40 00 00 00 00 00 00 00 00 0a 00 00 00 01 00 00 00 01 00 00 00 00 00 00 00 00 00 00 00 00 00 24 40 02 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 02 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 02 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 02 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 02 00 00 00 00 00 00 00 00 00 00 00 10 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 03 00 00 00 00 00 00 00 10 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 03 00 00 00 00 00 00 00 10 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 03 00 00 00 00 00 00 00 10 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 03 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 40 00 00 00 00 00 40 9f 40 00 00 00 00 00 00 00 00 0a 00 00 00 01 00 00 00 01 00 00 00 00 00 00 00 00 00 00 00 00 00 14 40 02 00 00 00 00 00 00 00 02 00 00 00 00 00 00 00 02 00 00 00 00 00 00 00 02 00 00 00 00 00 00 00 02 00 00 00 00 00 00 00 08 00 00 00 00 00 00 00 00 00 00 00 03 00 00 00 00 00 00 00 08 00 00 00 00 00 00 00 00 00 00 00 03 00 00 00 00 00 00 00 08 00 00 00 00 00 00 00 00 00 00 00 03 00 00 00 00 00 00 00 08 00 00 00 00 00 00 00 00 00 00 00 03 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 40 00 00 00 00 00 40 9f 40 00 00 00 00 00 00 00 00 0a 00 00 00 01 00 00 00 01 00 00 00 00 00 00 00 00 00 00 00 00 00 14 40 02 00 00 00 00 00 00 00 02 00 00 00 00 00 00 00 02 00 00 00 00 00 00 00 02 00 00 00 00 00 00 00 02 00 00 00 00 00 00 00 08 00 00 00 00 00 00 00 00 00 00 00 03 00 00 00 00 00 00 00 08 00 00 00 00 00 00 00 00 00 00 00 03 00 00 00 00 00 00 00 08 00 00 00 00 00 00 00 00 00 00 00 03 00 00 00 00 00 00 00 08 00 00 00 00 00 00 00 00 00 00 00 03 00 00 00 01 00 00 00 01 00 00 00 00 00 00 00 00 00 10 40 00 00 00 00 00 00 64 40 00 00 00 00 00 40 6f 40 4b 00 00 00 03 00 00 00 01 00 00 00 00 00 00 00 00 00 00 00 00 00 14 40 02 00 00 00 01 00 00 00 00 00 00 00 01 00 00 00 00 00 00 00 00 00 00 00 02 00 00 00 00 00 00 00 02 00 00 00 01 00 00 00 08 00 00 00 02 00 00 00 00 00 00 00 02 00 00 00 01 00 00 00 08 00 00 00 02 00 00 00 00 00 00 00 02 00 00 00 00 00 00 00 08 00 00 00 00 00 00 00 00 00 00 00 03 00 00 00 00 00 00 00 08 00 00 00 00 00 00 00 00 00 00 00 03 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 40 00 00 00 00 00 40 9f 40 00 00 00 00 00 00 00 00 0a 00 00 00 01 00 00 00 01 00 00 00 00 00 00 00 00 00 00 00 00 00 14 40 02 00 00 00 00 00 00 00 02 00 00 00 00 00 00 00 02 00 00 00 00 00 00 00 02 00 00 00 00 00 00 00 02 00 00 00 00 00 00 00 08 00 00 00 00 00 00 00 00 00 00 00 03 00 00 00 00 00 00 00 08 00 00 00 00 00 00 00 00 00 00 00 03 00 00 00 00 00 00 00 08 00 00 00 00 00 00 00 00 00 00 00 03 00 00 00 00 00 00 00 08 00 00 00 00 00 00 00 00 00 00 00 03 00 00 00];
> reg = <0x0 0x80000000 0x0 0x40000>;
> };
> 
> ```

---

<div class="post-metadata">

**Author:** ![marioruiz](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.pynq.io/marioruiz/32/2177_2.png) [@marioruiz](https://discuss.pynq.io/u/marioruiz)\
**Post date:** [February 13, 2023, 5:32pm UTC](https://discuss.pynq.io/t/zcu208-and-usp-rf-data-converter/5218/2 "2023-02-13T17:32:57Z")

</div>

Hi @jramsey123,

I don’t think that updating the dtsi file would work.  
You can try to use device tree overlays to update the device tree at runtime.

We do this to deploy PYNQ on the KV260. [https://github.com/Xilinx/Kria-PYNQ/tree/main/dts](https://github.com/Xilinx/Kria-PYNQ/tree/main/dts)  
This thread can also help you trying to define the dtbo for your use case.

> [@PYNQ3.0.1 allocate ddr4 returns buffer outside of address range](https://discuss.pynq.io/t/pynq3-0-1-allocate-ddr4-returns-buffer-outside-of-address-range/4918):
>
> Hello, I just upgraded my ZCU111 from PYNQ2.7 to PYNQ3.0.1. I’m using the same bitstream + hwh built with Vivado 2022.1 and I’m noticing some weird behavior with pynq.allocate(). I am attempting to allocate a buffer targeting the PL DDR4: \>\> buffer = pynq.allocate((n, 2), dtype='i2', target=ol.capture.ddr4\_0) \>\> print(hex(buffer.device\_address)) 0x78800000 \>\>print(hex(ol.capture.ddr4\_0.base\_address)) 0x500000000 pynq.allocate() is returning a buffer below the base address of the PL DDR4? Thi…

Mario