2016-06-11 22:13:39 +02:00
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system/composite
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^^^^^^^^^^^^^^^^^^
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2017-07-16 16:45:26 +02:00
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This logic adds a NSH command to control a USB composite device. The only
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supported devices in the composite are CDC/ACM serial and a USB mass storage
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device. Which devices are enclosed in a composite device is configured with
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an array of configuration-structs, handed over to the function
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composite_initialize().
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2016-06-11 22:13:39 +02:00
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Required overall configuration:
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2017-07-16 16:45:26 +02:00
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Enable the USB Support of your Hardware / Processor e.g. SAMV7_USBDEVHS=y
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CONFIG_USBDEV=y - USB device support
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CONFIG_USBDEV_COMPOSITE=y - USB composite device support
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CONFIG_COMPOSITE_IAD=y - Interface associate descriptor needed
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CONFIG_CDCACM=y - USB CDC/ACM serial device support
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CONFIG_CDCACM_COMPOSITE=y - USB CDC/ACM serial composite device support
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The interface-, string-descriptor- and endpoint-numbers are configured via the
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configuration-structs as noted above. The CDC/ACM serial device needs three
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endpoints; one interrupt-driven and two bulk endpoints.
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CONFIG_USBMSC=y - USB mass storage device support
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CONFIG_USBMSC_COMPOSITE=y - USB mass storage composite device support
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Like the configuration for the CDC/ACM, the descriptor- and endpoint-numbers
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are configured via the configuration struct.
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Depending on the configuration struct you need to configure different vendor-
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and product-IDs. Each VID/PID is unique to a device and thus to a dedicated
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configuration.
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Linux tries to detect the device types and installs default drivers if the
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VID/PID pair is unknown.
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Windows insists on a known and installed configuration. With an Atmel
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hardware and Atmel-Studio or the Atmel-USB-drivers installed, you can test
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your configuration with Atmel Example Vendor- and Product-IDs.
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If you have a USBMSC and a CDC/ACM configured in your combo, then you can try
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to use
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- VID = 0x03EB (ATMEL)
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- PID = 0x2424 (ASF Example with MSC and CDC)
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If for example you try to test a configuration with up to seven CDCs, then
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- VID = 0x03EB (ATMEL)
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- PID = 0x2426 (ASF Example with up to seven CDCs)
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2016-06-11 22:13:39 +02:00
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CONFIG_NSH_BUILTIN_APPS
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This add-on can be built as two NSH "built-in" commands if this option
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2017-07-16 16:45:26 +02:00
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is selected: 'conn' will connect the USB composite device; 'disconn'
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2016-06-11 22:13:39 +02:00
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will disconnect the USB composite device.
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Configuration options unique to this add-on:
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CONFIG_SYSTEM_COMPOSITE_DEBUGMM
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Enables some debug tests to check for memory usage and memory leaks.
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If CONFIG_USBDEV_TRACE is enabled (or CONFIG_DEBUG_FEATURES and CONFIG_DEBUG_USB), then
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the add-on code will also manage the USB trace output. The amount of trace output
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can be controlled using:
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CONFIG_SYSTEM_COMPOSITE_TRACEINIT
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Show initialization events
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CONFIG_SYSTEM_COMPOSITE_TRACECLASS
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Show class driver events
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CONFIG_SYSTEM_COMPOSITE_TRACETRANSFERS
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Show data transfer events
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CONFIG_SYSTEM_COMPOSITE_TRACECONTROLLER
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Show controller events
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CONFIG_SYSTEM_COMPOSITE_TRACEINTERRUPTS
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Show interrupt-related events.
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