fix host issue when mounting an CDC device without IAD
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@@ -1522,7 +1522,7 @@ static bool _parse_configuration_descriptor(uint8_t dev_addr, tusb_desc_configur
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#if CFG_TUH_MIDI
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// MIDI has 2 interfaces (Audio Control v1 + MIDIStreaming) but does not have IAD
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// manually increase the associated count
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// manually force associated count = 2
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if (1 == assoc_itf_count &&
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TUSB_CLASS_AUDIO == desc_itf->bInterfaceClass &&
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AUDIO_SUBCLASS_CONTROL == desc_itf->bInterfaceSubClass &&
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@@ -1532,6 +1532,17 @@ static bool _parse_configuration_descriptor(uint8_t dev_addr, tusb_desc_configur
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}
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#endif
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#if CFG_TUH_CDC
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// Some legacy CDC device does not use IAD but rather use device class as hint to combine 2 interfaces
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// manually force associated count = 2
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if (1 == assoc_itf_count &&
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TUSB_CLASS_CDC == desc_itf->bInterfaceClass &&
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CDC_COMM_SUBCLASS_ABSTRACT_CONTROL_MODEL == desc_itf->bInterfaceSubClass)
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{
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assoc_itf_count = 2;
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}
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#endif
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uint16_t const drv_len = tu_desc_get_interface_total_len(desc_itf, assoc_itf_count, (uint16_t) (desc_end-p_desc));
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TU_ASSERT(drv_len >= sizeof(tusb_desc_interface_t));
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