From 787c891702a9e6f4ddfe4f4c04457d7304fd21d5 Mon Sep 17 00:00:00 2001 From: hathach Date: Tue, 21 Jul 2020 21:00:11 +0700 Subject: add note for MS OS 1.0 Descriptor at 0xEE --- examples/device/cdc_msc/src/usb_descriptors.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'examples/device/cdc_msc/src') diff --git a/examples/device/cdc_msc/src/usb_descriptors.c b/examples/device/cdc_msc/src/usb_descriptors.c index d6b0d73cc..e13b8189b 100644 --- a/examples/device/cdc_msc/src/usb_descriptors.c +++ b/examples/device/cdc_msc/src/usb_descriptors.c @@ -187,7 +187,8 @@ uint16_t const* tud_descriptor_string_cb(uint8_t index, uint16_t langid) chr_count = 1; }else { - // Convert ASCII string into UTF-16 + // Note: the 0xEE index string is a Microsoft OS 1.0 Descriptors. + // https://docs.microsoft.com/en-us/windows-hardware/drivers/usbcon/microsoft-defined-usb-descriptors if ( !(index < sizeof(string_desc_arr)/sizeof(string_desc_arr[0])) ) return NULL; @@ -197,6 +198,7 @@ uint16_t const* tud_descriptor_string_cb(uint8_t index, uint16_t langid) chr_count = strlen(str); if ( chr_count > 31 ) chr_count = 31; + // Convert ASCII string into UTF-16 for(uint8_t i=0; i