diff options
| author | Dean Camera <dean@fourwalledcubicle.com> | 2009-04-07 11:46:54 +0000 |
|---|---|---|
| committer | Dean Camera <dean@fourwalledcubicle.com> | 2009-04-07 11:46:54 +0000 |
| commit | 51910b450533fb7c335ee3d970d758fc25b05547 (patch) | |
| tree | 2be6906f92a7531a022f567103eb912b6efe891b /Demos/Host | |
| parent | cb7884da506096352ad82a1317b998813b74f4f8 (diff) | |
| download | lufa-51910b450533fb7c335ee3d970d758fc25b05547.tar.gz lufa-51910b450533fb7c335ee3d970d758fc25b05547.tar.bz2 lufa-51910b450533fb7c335ee3d970d758fc25b05547.zip | |
Added support to the CDCHost demo for devices with mutiple CDC interfaces which are not the correct ACM type preceeding the desired ACM CDC interface.
Diffstat (limited to 'Demos/Host')
| -rw-r--r-- | Demos/Host/CDCHost/ConfigDescriptor.c | 45 | ||||
| -rw-r--r-- | Demos/Host/CDCHost/ConfigDescriptor.h | 3 |
2 files changed, 39 insertions, 9 deletions
diff --git a/Demos/Host/CDCHost/ConfigDescriptor.c b/Demos/Host/CDCHost/ConfigDescriptor.c index eb80ec3ea..3b919bd9b 100644 --- a/Demos/Host/CDCHost/ConfigDescriptor.c +++ b/Demos/Host/CDCHost/ConfigDescriptor.c @@ -69,8 +69,8 @@ uint8_t ProcessConfigurationDescriptor(void) if (DESCRIPTOR_TYPE(ConfigDescriptorData) != DTYPE_Configuration)
return InvalidConfigDataReturned;
- /* Get the CDC interface from the configuration descriptor */
- if (USB_Host_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData, NextCDCInterface))
+ /* Get the CDC control interface from the configuration descriptor */
+ if (USB_Host_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData, NextCDCControlInterface))
{
/* Descriptor not found, error out */
return NoCDCInterfaceFound;
@@ -83,11 +83,24 @@ uint8_t ProcessConfigurationDescriptor(void) if (USB_Host_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,
NextInterfaceCDCDataEndpoint))
{
- /* Get the next CDC interface from the configuration descriptor (CDC class has two CDC interfaces) */
- if (USB_Host_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData, NextCDCInterface))
+ /* Check to see if the control interface's notification pipe has been found, if so search for the data interface */
+ if (FoundEndpoints & (1 << CDC_NOTIFICATIONPIPE))
{
- /* Descriptor not found, error out */
- return NoCDCInterfaceFound;
+ /* Get the next CDC data interface from the configuration descriptor (CDC class has two CDC interfaces) */
+ if (USB_Host_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData, NextCDCDataInterface))
+ {
+ /* Descriptor not found, error out */
+ return NoCDCInterfaceFound;
+ }
+ }
+ else
+ {
+ /* Get the next CDC control interface from the configuration descriptor (CDC class has two CDC interfaces) */
+ if (USB_Host_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData, NextCDCControlInterface))
+ {
+ /* Descriptor not found, error out */
+ return NoCDCInterfaceFound;
+ }
}
/* Fetch the next bulk or interrupt endpoint from the current CDC interface */
@@ -155,11 +168,11 @@ uint8_t ProcessConfigurationDescriptor(void) * configuration descriptor, to search for a specific sub descriptor. It can also be used to abort the configuration
* descriptor processing if an incompatible descriptor configuration is found.
*
- * This comparator searches for the next Interface descriptor of the correct CDC Class, Subclass and Protocol values.
+ * This comparator searches for the next Interface descriptor of the correct CDC control Class, Subclass and Protocol values.
*
* \return A value from the DSEARCH_Return_ErrorCodes_t enum
*/
-DESCRIPTOR_COMPARATOR(NextCDCInterface)
+DESCRIPTOR_COMPARATOR(NextCDCControlInterface)
{
if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Interface)
{
@@ -170,7 +183,23 @@ DESCRIPTOR_COMPARATOR(NextCDCInterface) {
return Descriptor_Search_Found;
}
+ }
+
+ return Descriptor_Search_NotFound;
+}
+/** Descriptor comparator function. This comparator function is can be called while processing an attached USB device's
+ * configuration descriptor, to search for a specific sub descriptor. It can also be used to abort the configuration
+ * descriptor processing if an incompatible descriptor configuration is found.
+ *
+ * This comparator searches for the next Interface descriptor of the correct CDC data Class, Subclass and Protocol values.
+ *
+ * \return A value from the DSEARCH_Return_ErrorCodes_t enum
+ */
+DESCRIPTOR_COMPARATOR(NextCDCDataInterface)
+{
+ if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Interface)
+ {
/* Check the CDC descriptor class, subclass and protocol, break out if correct data interface found */
if ((DESCRIPTOR_CAST(CurrentDescriptor, USB_Descriptor_Interface_t).Class == CDC_DATA_CLASS) &&
(DESCRIPTOR_CAST(CurrentDescriptor, USB_Descriptor_Interface_t).SubClass == CDC_DATA_SUBCLASS) &&
diff --git a/Demos/Host/CDCHost/ConfigDescriptor.h b/Demos/Host/CDCHost/ConfigDescriptor.h index 0ba614824..9db4b6505 100644 --- a/Demos/Host/CDCHost/ConfigDescriptor.h +++ b/Demos/Host/CDCHost/ConfigDescriptor.h @@ -77,7 +77,8 @@ };
/* Configuration Descriptor Comparison Functions: */
- DESCRIPTOR_COMPARATOR(NextCDCInterface);
+ DESCRIPTOR_COMPARATOR(NextCDCControlInterface);
+ DESCRIPTOR_COMPARATOR(NextCDCDataInterface);
DESCRIPTOR_COMPARATOR(NextInterfaceCDCDataEndpoint);
/* Function Prototypes: */
|