谢谢你的回答。

我把文件改成这样， 就是把上面那段添加到system-user.dtsi

文件如下：

/include/ "system-conf.dtsi"

/ {

};

/ {

};

usb_0: usb@e0002000 {

compatible = "xlnx,zynq-usb-2.20.a", "chipidea,usb2";

clocks =

dr_mode = "host";

interrupt-parent = ;

interrupts = <0 21 4>;

reg = <0xe0002000 0x1000>;

usb-phy = ;

};

usb_phy0: phy0 {

compatible = "ulpi-phy";

#phy-cells = <0>;

reg = <0xe0002000 0x1000>;

view-port = <0x170>;

drv-vbus;

}

结果报错如下：

NOTE: Resolving any missing task queue dependencies

Initialising tasks: 100% |#######################################| Time: 0:00:14

Checking sstate mirror object availability: 100% |###############| Time: 0:00:01

NOTE: Executing SetScene Tasks

NOTE: Executing RunQueue Tasks

ERROR: device-tree-xilinx+gitAUTOINC+f38738e568-r0 do_compile: Function failed: do_compile (log file is located at /home/liwenz/alinx/gpio/build/tmp/work/plnx_zynq7-xilinx-linux-gnueabi/device-tree/xilinx+gitAUTOINC+f38738e568-r0/temp/log.do_compile.130709)

ERROR: Logfile of failure stored in: /home/liwenz/alinx/gpio/build/tmp/work/plnx_zynq7-xilinx-linux-gnueabi/device-tree/xilinx+gitAUTOINC+f38738e568-r0/temp/log.do_compile.130709

Log data follows:

| DEBUG: Executing shell function do_compile

| Error: /home/liwenz/alinx/gpio/build/tmp/work/plnx_zynq7-xilinx-linux-gnueabi/device-tree/xilinx+gitAUTOINC+f38738e568-r0/system-user.dtsi:7.8-20 syntax error

| FATAL ERROR: Unable to parse input tree

| WARNING: /home/liwenz/alinx/gpio/build/tmp/work/plnx_zynq7-xilinx-linux-gnueabi/device-tree/xilinx+gitAUTOINC+f38738e568-r0/temp/run.do_compile.130709:1 exit 1 from 'dtc -I dts -O dtb -R 8 -p 0x1000 -b 0 -i /home/liwenz/alinx/gpio/build/../components/plnx_workspace/device-tree/device-tree -i /home/liwenz/alinx/gpio/build/tmp/work-shared/plnx-zynq7/kernel-source/include -i /home/liwenz/alinx/gpio/build/tmp/work-shared/plnx-zynq7/kernel-source/include -i /home/liwenz/alinx/gpio/build/tmp/work/plnx_zynq7-xilinx-linux-gnueabi/device-tree/xilinx+gitAUTOINC+f38738e568-r0 -o ${DTS_NAME}.dtb `basename ${DTS_FILE}`.pp'

| ERROR: Function failed: do_compile (log file is located at /home/liwenz/alinx/gpio/build/tmp/work/plnx_zynq7-xilinx-linux-gnueabi/device-tree/xilinx+gitAUTOINC+f38738e568-r0/temp/log.do_compile.130709)

ERROR: Task (/home/liwenz/petalinux/components/yocto/source/arm/layers/meta-xilinx/meta-xilinx-bsp/recipes-bsp/device-tree/device-tree.bb:do_compile) failed with exit code '1'

NOTE: Tasks Summary: Attempted 3004 tasks of which 2991 didn't need to be rerun and 1 failed.

Summary: 1 task failed:

/home/liwenz/petalinux/components/yocto/source/arm/layers/meta-xilinx/meta-xilinx-bsp/recipes-bsp/device-tree/device-tree.bb:do_compile

Summary: There was 1 ERROR message shown, returning a non-zero exit code.

ERROR: Failed to build project

其实别人给我这么说的：

Please follow below steps.

1 . Open system-user.dtsi and add below device tree changes.

vim project-spec/meta-user/recipes-bsp/device-tree/files/system-user.dtsi

/include/ "system-conf.dtsi"

/ {

};

&usb0 {

dr_mode = "host";

status = "okay";

};

&usb1 {

dr_mode = "host";

status = "okay";

};

petalinux-build

我这么做，可以 petalinux-build 但没有变化，还是看不到u 盘。

还有devicetree 在petalinux-build 后是不是有个结果文件，这样可以核对检查。

workproject/components/plnx_workspace/device-tree/device-tree 下有个

zynq-7000.dtsi 我以为他就是结果文件

上面推荐那么修改，这个文件没变化。 usb 段是这样的

usb0: usb@e0002000 {

compatible = "xlnx,zynq-usb-2.20a", "chipidea,usb2";

status = "disabled";

clocks = ;

interrupt-parent = ;

interrupts = <0 21 4>;

reg = <0xe0002000 0x1000>;

phy_type = "ulpi";

};

这里有个disabled ， 但我发现串口， sd 都是disable 但他们可以用