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Fixed LowLevel JoystickHostWithParser demo not saving the chosen HID interface's report descriptor size.

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Simplified low level Host demo configuration descriptor parser routines.
This commit is contained in:
Dean Camera 2010-10-01 12:01:54 +00:00
parent d36c96d6a5
commit c8942ef469
15 changed files with 175 additions and 217 deletions
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27
Projects/MissileLauncher/ConfigDescriptor.c
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@ -51,8 +51,9 @@ uint8_t ProcessConfigurationDescriptor(void)
void* CurrConfigLocation = ConfigDescriptorData;
uint16_t CurrConfigBytesRem;
USB_Descriptor_Endpoint_t* DataINEndpoint = NULL;
USB_Descriptor_Endpoint_t* DataOUTEndpoint = NULL;
USB_Descriptor_Interface_t* HIDInterface = NULL;
USB_Descriptor_Endpoint_t* DataINEndpoint = NULL;
USB_Descriptor_Endpoint_t* DataOUTEndpoint = NULL;
/* Retrieve the entire configuration descriptor into the allocated buffer */
switch (USB_Host_GetDeviceConfigDescriptor(1, &CurrConfigBytesRem, ConfigDescriptorData, sizeof(ConfigDescriptorData)))
@ -66,19 +67,12 @@ uint8_t ProcessConfigurationDescriptor(void)
default:
return ControlError;
}
/* Get the first HID interface from the configuration descriptor */
if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation,
DComp_NextHIDInterface) != DESCRIPTOR_SEARCH_COMP_Found)
{
/* Descriptor not found, error out */
return NoCompatibleInterfaceFound;
}
while (!(DataINEndpoint) || !(DataOUTEndpoint))
{
/* Get the next HID interface's data endpoint descriptor */
if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation,
/* See if we've found a likely compatible interface, and if there is an endpoint within that interface */
if (!(HIDInterface) ||
USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation,
DComp_NextHIDInterfaceDataEndpoint) != DESCRIPTOR_SEARCH_COMP_Found)
{
/* Not all HID devices have an OUT endpoint - if we've reached the end of the HID descriptor
@ -86,9 +80,6 @@ uint8_t ProcessConfigurationDescriptor(void)
if (DataINEndpoint)
break;
/* Clear any found endpoints */
DataOUTEndpoint = NULL;
/* Get the next HID interface from the configuration descriptor */
if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation,
DComp_NextHIDInterface) != DESCRIPTOR_SEARCH_COMP_Found)
@ -97,6 +88,12 @@ uint8_t ProcessConfigurationDescriptor(void)
return NoCompatibleInterfaceFound;
}
/* Save the interface in case we need to refer back to it later */
HIDInterface = DESCRIPTOR_PCAST(CurrConfigLocation, USB_Descriptor_Interface_t);
/* Clear any found endpoints */
DataOUTEndpoint = NULL;
/* Skip the remainder of the loop as we have not found an endpoint yet */
continue;
}