diff options
Diffstat (limited to 'nuttx/drivers/usbdev/cdc_serial.c')
| -rw-r--r-- | nuttx/drivers/usbdev/cdc_serial.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/nuttx/drivers/usbdev/cdc_serial.c b/nuttx/drivers/usbdev/cdc_serial.c index d5d5739b2..bab4e3951 100644 --- a/nuttx/drivers/usbdev/cdc_serial.c +++ b/nuttx/drivers/usbdev/cdc_serial.c @@ -2170,7 +2170,20 @@ static int usbser_ioctl(FAR struct file *filep,int cmd,unsigned long arg) case CAIOC_NOTIFY: { /* Not yet implemented. I probably won't bother to implement until - * I com up with a usage model that needs it. + * I comr up with a usage model that needs it. + * + * Here is what the needs to be done: + * + * 1. Format and send a request header with: + * + * bmRequestType: + * USB_REQ_DIR_IN|USB_REQ_TYPE_CLASS|USB_REQ_RECIPIENT_INTERFACE + * bRequest: ACM_SERIAL_STATE + * wValue: 0 + * wIndex: 0 + * wLength: Length of data + * + * 2. Followed by the notification data (in a separate packet) */ ret = -ENOSYS; |