Add optional double-banking support to the Device mode Class Drivers, on a per-endpoi...

[pub/USBasp.git] / Demos / Host / LowLevel / KeyboardHostWithParser / ConfigDescriptor.c

diff --git a/Demos/Host/LowLevel/KeyboardHostWithParser/ConfigDescriptor.c b/Demos/Host/LowLevel/KeyboardHostWithParser/ConfigDescriptor.c
index d9fd50f..e587a75 100644 (file)
--- a/Demos/Host/LowLevel/KeyboardHostWithParser/ConfigDescriptor.c
+++ b/Demos/Host/LowLevel/KeyboardHostWithParser/ConfigDescriptor.c
@@ -43,33 +43,29 @@
  *\r
  *  This routine searches for a HID interface descriptor containing at least one Interrupt type IN endpoint and HID descriptor.\r
  *\r
- *  \return An error code from the KeyboardHostWithParser_GetConfigDescriptorDataCodes_t enum.\r
+ *  \return An error code from the \ref KeyboardHostWithParser_GetConfigDescriptorDataCodes_t enum.\r
  */\r
 uint8_t ProcessConfigurationDescriptor(void)\r
 {\r
-       uint8_t* ConfigDescriptorData;\r
-       uint16_t ConfigDescriptorSize;\r
-       \r
-       /* Get Configuration Descriptor size from the device */\r
-       if (USB_GetDeviceConfigDescriptor(1, &ConfigDescriptorSize, NULL) != HOST_SENDCONTROL_Successful)\r
-         return ControlError;\r
-       \r
-       /* Ensure that the Configuration Descriptor isn't too large */\r
-       if (ConfigDescriptorSize > MAX_CONFIG_DESCRIPTOR_SIZE)\r
-         return DescriptorTooLarge;\r
-         \r
-       /* Allocate enough memory for the entire config descriptor */\r
-       ConfigDescriptorData = alloca(ConfigDescriptorSize);\r
+       uint8_t  ConfigDescriptorData[512];\r
+       uint8_t* CurrConfigLocation = ConfigDescriptorData;\r
+       uint16_t CurrConfigBytesRem;\r
 \r
        /* Retrieve the entire configuration descriptor into the allocated buffer */\r
-       USB_GetDeviceConfigDescriptor(1, &ConfigDescriptorSize, ConfigDescriptorData);\r
-       \r
-       /* Validate returned data - ensure first entry is a configuration header descriptor */\r
-       if (DESCRIPTOR_TYPE(ConfigDescriptorData) != DTYPE_Configuration)\r
-         return InvalidConfigDataReturned;\r
+       switch (USB_GetDeviceConfigDescriptor(1, &CurrConfigBytesRem, ConfigDescriptorData, sizeof(ConfigDescriptorData)))\r
+       {\r
+               case HOST_GETCONFIG_Successful:\r
+                       break;\r
+               case HOST_GETCONFIG_InvalidData:\r
+                       return InvalidConfigDataReturned;\r
+               case HOST_GETCONFIG_BuffOverflow:\r
+                       return DescriptorTooLarge;\r
+               default:\r
+                       return ControlError;\r
+       }\r
        \r
        /* Get the keyboard interface from the configuration descriptor */\r
-       if (USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,\r
+       if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation,\r
                                      DComp_NextKeyboardInterface) != DESCRIPTOR_SEARCH_COMP_Found)\r
        {\r
                /* Descriptor not found, error out */\r
@@ -77,7 +73,7 @@ uint8_t ProcessConfigurationDescriptor(void)
        }\r
        \r
        /* Get the keyboard interface's HID descriptor */\r
-       if (USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,\r
+       if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation,\r
                                      DComp_NextHID) != DESCRIPTOR_SEARCH_COMP_Found)\r
        {\r
                /* Descriptor not found, error out */\r
@@ -85,18 +81,18 @@ uint8_t ProcessConfigurationDescriptor(void)
        }\r
 \r
        /* Save the HID report size for later use */\r
-       HIDReportSize = DESCRIPTOR_CAST(ConfigDescriptorData, USB_Descriptor_HID_t).HIDReportLength;\r
+       HIDReportSize = DESCRIPTOR_CAST(CurrConfigLocation, USB_Descriptor_HID_t).HIDReportLength;\r
 \r
        /* Get the keyboard interface's data endpoint descriptor */\r
-       if (USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,\r
-                                     DComp_NextInterfaceKeyboardDataEndpoint) != DESCRIPTOR_SEARCH_COMP_Found)\r
+       if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation,\r
+                                     DComp_NextKeyboardInterfaceDataEndpoint) != DESCRIPTOR_SEARCH_COMP_Found)\r
        {\r
                /* Descriptor not found, error out */\r
                return NoEndpointFound;\r
        }\r
        \r
        /* Retrieve the endpoint address from the endpoint descriptor */\r
-       USB_Descriptor_Endpoint_t* EndpointData = DESCRIPTOR_PCAST(ConfigDescriptorData, USB_Descriptor_Endpoint_t);\r
+       USB_Descriptor_Endpoint_t* EndpointData = DESCRIPTOR_PCAST(CurrConfigLocation, USB_Descriptor_Endpoint_t);\r
 \r
        /* Configure the keyboard data pipe */\r
        Pipe_ConfigurePipe(KEYBOARD_DATAPIPE, EP_TYPE_INTERRUPT, PIPE_TOKEN_IN,\r
@@ -138,7 +134,7 @@ uint8_t DComp_NextKeyboardInterface(void* CurrentDescriptor)
  *\r
  *  \return A value from the DSEARCH_Return_ErrorCodes_t enum\r
  */\r
-uint8_t DComp_NextInterfaceKeyboardDataEndpoint(void* CurrentDescriptor)\r
+uint8_t DComp_NextKeyboardInterfaceDataEndpoint(void* CurrentDescriptor)\r
 {\r
        if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Endpoint)\r
        {\r