[ARM][NXP]: MIMXRT1180-EVK USB ECM/EEM problem

[javad123javad]

Describe the bug

Hi,

We're experiencing issues with the USB EEM/ECM functionality on the NXP MIMXRT1180-EVK board.

• When building and flashing Zephyr’s network application (ECM on the CM33 core, the application fails to load after flashing. Following this, the board becomes unresponsive, and no further applications can be flashed.

• The same problem is happening when using other USB-based applications such as samples/subsys/usb/cdc_acm

• On the CM7 core, the application loads successfully, but the USB stack fails to initialize.

Could you please advise on how to resolve this or suggest any troubleshooting steps?

Thanks,

Regression

• This is a regression.

Steps to reproduce

• Adding the following configuration to the project configuration:

CONFIG_USB_DEVICE_STACK=y

# Select USB Configurations
CONFIG_USB_DEVICE_NETWORK_ECM=y

#########################

# Other network-related configs:
# Networking config

CONFIG_NETWORKING=y                             
CONFIG_NET_INTERFACE_NAME=y         
CONFIG_NET_IPV4=y                                       
CONFIG_NET_IPV6=n                   
CONFIG_NET_IPV4_AUTO=n                          
CONFIG_NET_TCP=y                                     
CONFIG_NET_UDP=y
CONFIG_NET_SOCKETS=y                           
CONFIG_ZVFS_POLL_MAX=8
CONFIG_ZVFS_OPEN_MAX=32

CONFIG_NET_DRIVERS=y
CONFIG_NET_L2_ETHERNET=y
CONFIG_NET_LOOPBACK=y                       
CONFIG_NET_MGMT=y
CONFIG_NET_MGMT_EVENT=y
CONFIG_DNS_RESOLVER=y
CONFIG_ETH_DRIVER=y
CONFIG_ETH_NXP_IMX_NETC=y
CONFIG_NET_IF_MAX_IPV4_COUNT=8
CONFIG_NET_DSA=y

CONFIG_NET_DEFAULT_IF_ETHERNET=y
CONFIG_NET_MAX_CONN=16
CONFIG_NET_MAX_CONTEXTS=16
CONFIG_NET_TX_STACK_SIZE=1500

CONFIG_NET_IF_MCAST_IPV4_ADDR_COUNT=8
CONFIG_NET_BUF_DATA_SIZE=2048

CONFIG_NET_CONFIG_SETTINGS=y
CONFIG_NET_CONFIG_NEED_IPV4=y
CONFIG_NET_CONFIG_MY_IPV4_ADDR="192.168.100.21"
CONFIG_NET_CONFIG_INIT_TIMEOUT=120
CONFIG_NET_NATIVE=y

• Disable one USB USBphys (Only one USB Phy is supported):

zephyr_udc0: &usb1 {
        status = "okay";
        phy-handle = <&usbphy1>;
};

&usbphy1 {
        status = "okay";
        tx-d-cal = <7>;
        tx-cal-45-dp-ohms = <6>;
        tx-cal-45-dm-ohms = <6>;
};

zephyr_udc1: &usb2{
        status = "disabled";
        phy-handle = <&usbphy2>;
};

&usbphy2 {
        status = "disabled";
        tx-d-cal = <7>;
        tx-cal-45-dp-ohms = <6>;
        tx-cal-45-dm-ohms = <6>;
};

Relevant log output

Impact

Major – Severely degrades functionality; workaround is difficult or unavailable.

Environment

• OS: Linux
• Zephyr: 4.2.99
• SDK: zephyr-sdk-0.17.2

Additional Context

No response

[EmilioCBen]

@MarkWangChinese
Would you mind taking a look at this?

[DerekSnell]

Hi @javad123javad ,

Your config shows you are trying to use the old (now legacy) USB Device stack. The RT1180 only supports the latest USB Device-Next stack. This earlier issue #85266 (comment) discusses that limitation. And recently with PR #87269 the new Device-Next stack is now the default, and the samples have been updated.

Using the latest cdc_acm with the new default stack works fine for me on the mimxrt1180_evk/cm33 board. For ECM, I see the USB samples page says "USB CDC ECM and USB CDC NCM implementations are covered by the networking samples zperf: Network Traffic Generator or HTTP Server". However, I do not yet have those working. We can look into that more next week.

Best regards