[TRD]update README_DPUCV2DX8G.rst (#1161)

* update README_DPUCV2DX8G.rst

* add command to make platform

Author: Peiyue Han

docsrc/source/docs/ref_design_docs/README_DPUCV2DX8G.rst

@@ -165,7 +165,15 @@ is set as shown below.
 
 **Step1:** Build VEK280 platform
 
-First, build the VEK280 platform in the folder `$TRD_HOME/vek280_platform`, following the instructions in `$TRD_HOME/vek280_platform/README.md`.
+First, build the VEK280 platform in the folder `$TRD_HOME/vek280_platform`, more details refer to the instructions in `$TRD_HOME/vek280_platform/README.md`.
+
+::
+
+   % source <Vitis_install_path>/Vitis/2023.1/settings64.sh
+
+   % source <PetaLinux_install_path>/settings.sh
+
+   % make all
 
 **Step2:** Setup the environment for building the DPUCV2DX8G IP and
 kernel
@@ -448,6 +456,11 @@ Package the RTL kernel as XO file. Then modify 2 files:
 
    set_param place.preplaceNOC true
 
+5) If your OS is Ubuntu, during AIE compilation step, you may get the error
+   like "[AIE ERROR] XAieSim_GetStackRange():522: Invalid Map file, 2: No 
+   such file or directory", the reason should be that your Ubuntu does not 
+   install the "rename" function, you can install it manually.
+
 .. raw:: html
 
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@@ -472,4 +485,4 @@ Package the RTL kernel as XO file. Then modify 2 files:
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