Can't open /dev/ttyRPMSG0

[Tom18]

I used the same code. Previously, I was using STM32Cube_FW_MP1_V1.2.0, but after forcibly upgrading to STM32Cube_FW_MP1_V1.7.0 using CubeIDE, the compiled firmware can no longer generate a virtual serial port（ /dev/ttyRPMSG0）.

This is the log I used with version 1.7.

[ 3276.128100] remoteproc remoteproc0: powering up m4
[ 3276.141973] remoteproc remoteproc0: Booting fw image RPMsg_UART_CM4_te.elf, size 2549508
[ 3276.149267]  mlahb:m4@10000000#vdev0buffer: assigned reserved memory node vdev0buffer@10042000
[ 3276.164561] virtio_rpmsg_bus virtio0: rpmsg host is online
[ 3276.168677] virtio_rpmsg_bus virtio0: creating channel rpmsg-tty addr 0x400
[ 3276.188640]  mlahb:m4@10000000#vdev0buffer: registered virtio0 (type 7)
[ 3276.203388] remoteproc remoteproc0: remote processor m4 is now up

This is the log I used with version 1.2

[ 3395.909607] remoteproc remoteproc0: powering up m4
[ 3395.954530] remoteproc remoteproc0: Booting fw image RPMsg_UART_CM4.elf, size 2042304
[ 3395.961362]  mlahb:m4@10000000#vdev0buffer: assigned reserved memory node vdev0buffer@10042000
[ 3395.975942] virtio_rpmsg_bus virtio0: rpmsg host is online
[ 3395.980062] virtio_rpmsg_bus virtio0: creating channel rpmsg-tty-channel addr 0x0
[ 3395.994741]  mlahb:m4@10000000#vdev0buffer: registered virtio0 (type 7)
[ 3395.999912] remoteproc remoteproc0: remote processor m4 is now up
[ 3396.028384] rpmsg_tty virtio0.rpmsg-tty-channel.-1.0: new channel: 0x400 -> 0x0 : ttyRPMSG0

This is a portion of my code, generated by CubeIDE. 

/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
  HAL_Init();

  /* USER CODE BEGIN Init */

  /* USER CODE END Init */

  if(IS_ENGINEERING_BOOT_MODE())
  {
    /* Configure the system clock */
    SystemClock_Config();
  }
  else
  {
    /* IPCC initialisation */
    MX_IPCC_Init();
    /* OpenAmp initialisation ---------------------------------*/
    MX_OPENAMP_Init(RPMSG_REMOTE, NULL);
  }

  /* USER CODE BEGIN SysInit */

  /* USER CODE END SysInit */

  /* Initialize all configured peripherals */
  /* USER CODE BEGIN 2 */

  if (VIRT_UART_Init(&huart0) != VIRT_UART_OK)
  {

	  Error_Handler();
   }

  if(VIRT_UART_RegisterCallback(&huart0, VIRT_UART_RXCPLT_CB_ID, VIRT_UART0_RxCpltCallback) != VIRT_UART_OK)
  {
	  Error_Handler();
  }
  /* USER CODE END 2 */

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */

[Olivier GALLIEN]

Hi @Tom18 

Going from 1.2 to 1.7 is a huge jump. Did you also move to latest CubeIDE ? 

Olivier 

[Tom18]

Yes, I'm using the latest version of cubeIDE v1.90, but it doesn't work. My device is mp151. I created a new demo to test it, but it still didn't work. Ultimately, I could only choose not to upgrade the firmware library

[shivam203]

Hi @Tom18 ,

You can take reference from the application which is present on this location:
STM32Cube_FW_MP1_V1.7.0\Projects\STM32MP157C-DK2\Applications\OpenAMP\OpenAMP_TTY_echo
On running the project present of this location, I got these logs.

Thank you

                                                                                                                                                                                           
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