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https://github.com/zephyrproject-rtos/zephyr
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e18fcbba5a
Now that device_api attribute is unmodified at runtime, as well as all the other attributes, it is possible to switch all device driver instance to be constant. A coccinelle rule is used for this: @r_const_dev_1 disable optional_qualifier @ @@ -struct device * +const struct device * @r_const_dev_2 disable optional_qualifier @ @@ -struct device * const +const struct device * Fixes #27399 Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com> |
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| README.rst | ||
| sample.yaml | ||
.. _usb_cdc-acm_composite: USB CDC ACM Sample Composite Application ######################################## Overview ******** This sample app demonstrates use of a USB Communication Device Class (CDC) Abstract Control Model (ACM) driver provided by the Zephyr project in Composite configuration. Two serial ports are created when the device is plugged to the PC. Received data from one serial port is sent to another serial port provided by this driver. Running ******* Plug the board into a host device, for example, a PC running Linux. The board will be detected as shown by the Linux dmesg command: .. code-block:: console usb 1-1.5.4: new full-speed USB device number 28 using ehci-pci usb 1-1.5.4: New USB device found, idVendor=2fe3, idProduct=0002, bcdDevice= 2.03 usb 1-1.5.4: New USB device strings: Mfr=1, Product=2, SerialNumber=3 usb 1-1.5.4: Product: Zephyr CDC ACM Composite sample usb 1-1.5.4: Manufacturer: ZEPHYR usb 1-1.5.4: SerialNumber: 86FE679A598AC47A cdc_acm 1-1.5.4:1.0: ttyACM1: USB ACM device cdc_acm 1-1.5.4:1.2: ttyACM2: USB ACM device The app prints on serial output, used for the console: .. code-block:: console Wait for DTR Open a serial port emulator, for example, minicom, and attach it to both detected CDC ACM devices: .. code-block:: console minicom --device /dev/ttyACM1 minicom --device /dev/ttyACM2 The app should respond on serial output with: .. code-block:: console DTR set, start test Baudrate detected: 115200 Baudrate detected: 115200 And on ttyACM devices provided by the Zephyr USB device stack: .. code-block:: console Send characters to another UART device The characters entered in one serial port will be sent to another serial port.