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| author | Kevin O'Connor <kevin@koconnor.net> | 2019-11-25 00:12:56 -0500 |
|---|---|---|
| committer | Kevin O'Connor <kevin@koconnor.net> | 2019-11-25 18:32:52 -0500 |
| commit | f76cb92b15afbb5022696bf20c7a0172e3c6f834 (patch) | |
| tree | e81a0f63ac4ab8650b8b15fc4a6c6a3ddd3c98a4 /src/generic/usb_cdc.c | |
| parent | bd6c25c9f8c28831d146f9077a0a2aa636c6e037 (diff) | |
| download | kutter-f76cb92b15afbb5022696bf20c7a0172e3c6f834.tar.gz kutter-f76cb92b15afbb5022696bf20c7a0172e3c6f834.tar.xz kutter-f76cb92b15afbb5022696bf20c7a0172e3c6f834.zip | |
usb_cdc: Add a usb_fill_serial() helper function
Add a helper function to fill the usb serial string descriptor. Use
it in the lpc176x code.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Diffstat (limited to 'src/generic/usb_cdc.c')
| -rw-r--r-- | src/generic/usb_cdc.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/src/generic/usb_cdc.c b/src/generic/usb_cdc.c index e213a07c..9adc0aa9 100644 --- a/src/generic/usb_cdc.c +++ b/src/generic/usb_cdc.c @@ -284,10 +284,27 @@ static const struct descriptor_s { &cdc_string_manufacturer, SIZE_cdc_string_manufacturer }, { (USB_DT_STRING<<8) | USB_STR_ID_PRODUCT, USB_LANGID_ENGLISH_US, &cdc_string_product, SIZE_cdc_string_product }, +#if !CONFIG_USB_SERIAL_NUMBER_CHIPID { (USB_DT_STRING<<8) | USB_STR_ID_SERIAL, USB_LANGID_ENGLISH_US, &cdc_string_serial, SIZE_cdc_string_serial }, +#endif }; +// Fill in a USB serial string descriptor from a chip id +void +usb_fill_serial(struct usb_string_descriptor *desc, int strlen, void *id) +{ + desc->bLength = sizeof(*desc) + strlen * sizeof(desc->data[0]); + desc->bDescriptorType = USB_DT_STRING; + + uint8_t *src = id; + int i; + for (i = 0; i < strlen; i++) { + uint8_t c = i & 1 ? src[i/2] & 0x0f : src[i/2] >> 4; + desc->data[i] = c < 10 ? c + '0' : c - 10 + 'A'; + } +} + /**************************************************************** * USB endpoint 0 control message handling |