How to create a composite USB device for mass storage AND CDC ACM?

Hello 4711. Unfortunately, I wasn't able to find any recent sources for the implementation either. Kindly let us know if you've figured out a workaround to this or if you still need help, so that I can escalate your question to the team.

-Jayesh
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Jayesh (SWF)

Thanks for the hint. I tried to reproduce (again) the description from your link (before you removed it). This was not easy because of the copy&paste-errors there.

Thread "USB-Storage-Thread"
    Symbol: usb_storage_thread
    Name: USB-Storage-Thread
    Stack size (bytes): 49152
    Priority: 2
    Auto start: Disabled
    Time slicing interval (ticks): 20
    
    Instance "g_ux_device_class_storage USBX Device Class Mass Storage"
      Name: g_ux_device_class_storage
      Mass Storage Class Parameter Setup: Manual (User Manual Setup if LUN is greater than 1)
      User Setup Callback (Only valid if Parameter Setup is Manual): ux_device_class_storage_user_setup
      Last LBA of Storage Media (Only valid if Parameter Setup is Auto): 0
      Bytes Per Sector of Storage Media (Only valid if Parameter Setup is Auto): 512
      Type of Storage Media (Only valid if Parameter Setup is Auto): 0
      Removable Flag of Storage Media (Only valid if Parameter Setup is Auto): 0
      Media Read Function Callback (Only valid if Parameter Setup is Auto): dummy1
      Media Write Function Callback (Only valid if Parameter Setup is Auto): dummy2
      Media Status Function Callback (Only valid if Parameter Setup is Auto): dummy3
      USBX Device Storage Instance Activate Callback Function: NULL
      USBX Device Storage Instance Deactivate Callback Function: NULL
      Vendor ID Name: NULL
      Product ID Name: NULL
      Product Revision Number: NULL
      Product Serial Number: NULL
      Name of generated initialization function: ux_device_class_storage_init
      Auto Initialization: Disable
      
      Instance "USBX Device Class Mass Storage Source"
        Show linkage warning: Disabled
        
      Instance "USBX Device Configuration"
        Vendor ID: 0x045B
        Product ID: 0x5302
        Device Release Number: 0x0100
        Index of Manufacturer String Descriptor: 0x01
        Index of Product String Descriptor: 0x02
        Index of Serial Number String Descriptor: 0x03
        Class Code: Miscellaneous
        Index of String Descriptor describing this configuration: 0x05
        Size of USB Descriptor in bytes for this configuration (Modify this value only for Vendor-specific Class, otherwise set zero): 0x00
        Number of Interfaces (Modify this value only for Vendor-specific Class, otherwise set zero): 0x00
        Self-Powered: Disable
        Remote Wakeup: Disable
        Maximum Power Consumption (in 2mA units): 250
        Supported Language Code: 0x0409
        Name of USBX String Framework: usbx_string_framework
        Total index number of USB String Descriptors in USBX String Framework: 6
        Name of USBX Language Framework: NULL
        Number of Languages to support (US English is applied if zero is set): 0
        Name of generated initialization function: ux_device_init
        Auto Initialization: Disable
        
        Instance "g_sf_el_ux_dcd_fs_0 USBX Port DCD on sf_el_ux for USBFS"
          Name: g_sf_el_ux_dcd_fs_0
          USB Controller Selection: USBFS
          
          Instance "g_transfer0 Transfer Driver on r_dmac USBFS FIFO 0"
            Name: g_transfer0
            Channel: 1
            Mode: Block
            Transfer Size: 1 Byte
            Destination Address Mode: Fixed
            Source Address Mode: Incremented
            Repeat Area (Unused in Normal Mode): Source
            Destination Pointer: NULL
            Source Pointer: NULL
            Number of Transfers: 0
            Number of Blocks (Valid only in Repeat and Block Mode): 0
            Offset value: 0
            Activation Source: USBFS FIFO 0
            Auto Enable: False
            Callback: NULL
            Transfer End Interrupt Priority: Priority 5
            
          Instance "g_transfer1 Transfer Driver on r_dmac USBFS FIFO 1"
            Name: g_transfer1
            Channel: 2
            Mode: Block
            Transfer Size: 1 Byte
            Destination Address Mode: Incremented
            Source Address Mode: Fixed
            Repeat Area (Unused in Normal Mode): Destination
            Destination Pointer: NULL
            Source Pointer: NULL
            Number of Transfers: 0
            Number of Blocks (Valid only in Repeat and Block Mode): 0
            Offset value: 0
            Activation Source: USBFS FIFO 1
            Auto Enable: False
            Callback: NULL
            Transfer End Interrupt Priority: Priority 5
            
        Instance "USBX on ux"
          USBX Pool Memory Name: g_ux_pool_memory
          USBX Pool Memory Size: 0x10000
          User Callback for Host Event Notification(Only valid for USB Host): NULL
          User Callback for Device Event Notification(Only valid for USB Device): NULL
          Name of generated initialization function: ux_common_init
          Auto Initialization: Disable
          
          Instance "USBX Source"
            Show linkage warning: Disabled
            
      Instance "g_usb_interface_descriptor_storage_0 USBX Interface Configuration Mass Storage Class"
        Name: g_usb_interface_descriptor_storage_0
        Interface Number of Bulk-Only Data Interface: 0x02
        Endpoint Number to be used for Bulk Out transfer: Endpoint 4
        Endpoint Number to be used for Bulk In transfer: Endpoint 5
        
    Instance "g_sf_comms0 Communications Framework on sf_el_ux_comms_v2"
      Name: g_sf_comms0
      Name of generated initialization function: sf_comms_init0
      Auto Initialization: Enable
      
      Instance "g_ux_device_class_cdc_acm0 USBX Device Class CDC-ACM"
        Name: g_ux_device_class_cdc_acm0
        USBX CDC-ACM instance_activate Function Callback: ux_cdc_device0_instance_activate
        USBX CDC-ACM instance_deactivate Function Callback: ux_cdc_device0_instance_deactivate
        USBX CDC-ACM parameter_change Function Callback: NULL
        Name of generated initialization function: ux_device_class_cdc_acm_init0
        Auto Initialization: Enable
        
        Instance "USBX Device Configuration"
          Vendor ID: 0x045B
          Product ID: 0x5302
          Device Release Number: 0x0100
          Index of Manufacturer String Descriptor: 0x01
          Index of Product String Descriptor: 0x02
          Index of Serial Number String Descriptor: 0x03
          Class Code: Miscellaneous
          Index of String Descriptor describing this configuration: 0x05
          Size of USB Descriptor in bytes for this configuration (Modify this value only for Vendor-specific Class, otherwise set zero): 0x00
          Number of Interfaces (Modify this value only for Vendor-specific Class, otherwise set zero): 0x00
          Self-Powered: Disable
          Remote Wakeup: Disable
          Maximum Power Consumption (in 2mA units): 250
          Supported Language Code: 0x0409
          Name of USBX String Framework: usbx_string_framework
          Total index number of USB String Descriptors in USBX String Framework: 6
          Name of USBX Language Framework: NULL
          Number of Languages to support (US English is applied if zero is set): 0
          Name of generated initialization function: ux_device_init
          Auto Initialization: Disable
          
          Instance "g_sf_el_ux_dcd_fs_0 USBX Port DCD on sf_el_ux for USBFS"
            Name: g_sf_el_ux_dcd_fs_0
            USB Controller Selection: USBFS
            
            Instance "g_transfer0 Transfer Driver on r_dmac USBFS FIFO 0"
              Name: g_transfer0
              Channel: 1
              Mode: Block
              Transfer Size: 1 Byte
              Destination Address Mode: Fixed
              Source Address Mode: Incremented
              Repeat Area (Unused in Normal Mode): Source
              Destination Pointer: NULL
              Source Pointer: NULL
              Number of Transfers: 0
              Number of Blocks (Valid only in Repeat and Block Mode): 0
              Offset value: 0
              Activation Source: USBFS FIFO 0
              Auto Enable: False
              Callback: NULL
              Transfer End Interrupt Priority: Priority 5
              
            Instance "g_transfer1 Transfer Driver on r_dmac USBFS FIFO 1"
              Name: g_transfer1
              Channel: 2
              Mode: Block
              Transfer Size: 1 Byte
              Destination Address Mode: Incremented
              Source Address Mode: Fixed
              Repeat Area (Unused in Normal Mode): Destination
              Destination Pointer: NULL
              Source Pointer: NULL
              Number of Transfers: 0
              Number of Blocks (Valid only in Repeat and Block Mode): 0
              Offset value: 0
              Activation Source: USBFS FIFO 1
              Auto Enable: False
              Callback: NULL
              Transfer End Interrupt Priority: Priority 5
              
          Instance "USBX on ux"
            USBX Pool Memory Name: g_ux_pool_memory
            USBX Pool Memory Size: 0x10000
            User Callback for Host Event Notification(Only valid for USB Host): NULL
            User Callback for Device Event Notification(Only valid for USB Device): NULL
            Name of generated initialization function: ux_common_init
            Auto Initialization: Disable
            
            Instance "USBX Source"
              Show linkage warning: Disabled
              
        Instance "g_usb_interface_desc_cdcacm_0 USBX Interface Configuration CDC-ACM"
          Name: g_usb_interface_desc_cdcacm_0
          Interface Number of Communications Class interface: 0x00
          Interrupt Transfer endpoint to use for Communications Class: Endpoint 3
          Polling period for Interrupt Endpoint (in mS/125us units for FS/HS): 0x0F
          Interface Number of Data Class interface: 0x01
          Bulk In Transfer endpoint to use for Data Class: Endpoint 1
          Bulk Out Transfer endpoint to use for Data Class: Endpoint 2
          Index of String Descriptor Describing Communications Class interface (Interface Descriptor:iInterface).: 0x06
          Index of String Descriptor Describing Data Class interface (Interface Descriptor:iInterface).: 0x00
          

Finally I ended up in a hardfault where the call stack is not really helpful to find out the reason for this issue. :-(

Till now I didn't find a working solution for my problem.
Are there any hints from the Renesas-Staff?

Hello 4711. Apologies for the delay. I've submitted a ticket for this issue and I'll let you know once I receive the response from the team. 

-Jayesh
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Hello 4711. Apologies for the delay. This is the response I received from the team:

When you hit hardfault, it is frustating as you dont know what causes it.  I usually add Segger hardfault handler to my project. When a hardfault is encountered, I can still step out of the hole and inspect which ever codes I was trying to execute before falling into this fault.  Hopefully it will give hint how to resolve it.  

Cortex-M Fault - SEGGER Wiki

For your case, I need to enable this macro, UX_SYSTEM_DEVICE_ONLY. The isr is trying to execute code from hcd.  In your case, only dcd is used.  This is on SSP 2.2.0/e2studio 2022-04.  I dont know what effect on EWARM or SSP version you are using.

Thanks, I opend a ticked hoping that there will be a functional solution because my project became time critical meanwhile.

Thanks for this hint. At the moment I don't have enough time to try to implement this. Do you think that this will work for a Renesas-Controller too because the registers used there are from the STM32?

The Segger Hardfault Handler deals with ARM Cortex M core registers.  I have use it on Synergy and RA.

Thanks, I'll try it.