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Tighten up the Bootloader GetDescriptor() function, as the descriptor size can be extracted from the header after the address has been found.

This commit is contained in:
Dean Camera 2011-02-06 17:04:39 +00:00
parent a95d224185
commit 355d12e039
3 changed files with 31 additions and 49 deletions
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19
Bootloaders/CDC/Descriptors.c
View File

@ -206,38 +206,29 @@ uint16_t CALLBACK_USB_GetDescriptor(const uint16_t wValue,
const uint8_t wIndex, const uint8_t wIndex,
const void** const DescriptorAddress) const void** const DescriptorAddress)
{ {
const uint8_t DescriptorType = (wValue >> 8); const uint8_t DescriptorType = (wValue >> 8);
const uint8_t DescriptorNumber = (wValue & 0xFF); const uint8_t DescriptorNumber = (wValue & 0xFF);
const void* Address = NULL; const void* Address = NULL;
uint16_t Size = NO_DESCRIPTOR;
switch (DescriptorType) switch (DescriptorType)
{ {
case DTYPE_Device: case DTYPE_Device:
Address = &DeviceDescriptor; Address = &DeviceDescriptor;
Size = sizeof(USB_Descriptor_Device_t);
break; break;
case DTYPE_Configuration: case DTYPE_Configuration:
Address = &ConfigurationDescriptor; Address = &ConfigurationDescriptor;
Size = sizeof(USB_Descriptor_Configuration_t);
break; break;
case DTYPE_String: case DTYPE_String:
if (!(DescriptorNumber)) if (!(DescriptorNumber))
{ Address = &LanguageString;
Address = &LanguageString;
Size = LanguageString.Header.Size;
}
else else
{ Address = &ProductString;
Address = &ProductString;
Size = ProductString.Header.Size;
}
break; break;
} }
*DescriptorAddress = Address; *DescriptorAddress = Address;
return Size; return (Address != NULL) ? ((USB_Descriptor_Header_t*)Address)->Size : NO_DESCRIPTOR;
} }

33
Bootloaders/DFU/Descriptors.c
View File

@ -73,17 +73,17 @@ USB_Descriptor_Configuration_t ConfigurationDescriptor =
{ {
.Config = .Config =
{ {
.Header = {.Size = sizeof(USB_Descriptor_Configuration_Header_t), .Type = DTYPE_Configuration}, .Header = {.Size = sizeof(USB_Descriptor_Configuration_Header_t), .Type = DTYPE_Configuration},
.TotalConfigurationSize = sizeof(USB_Descriptor_Configuration_t), .TotalConfigurationSize = sizeof(USB_Descriptor_Configuration_t),
.TotalInterfaces = 1, .TotalInterfaces = 1,
.ConfigurationNumber = 1, .ConfigurationNumber = 1,
.ConfigurationStrIndex = NO_DESCRIPTOR, .ConfigurationStrIndex = NO_DESCRIPTOR,
.ConfigAttributes = USB_CONFIG_ATTR_BUSPOWERED, .ConfigAttributes = USB_CONFIG_ATTR_BUSPOWERED,
.MaxPowerConsumption = USB_CONFIG_POWER_MA(100) .MaxPowerConsumption = USB_CONFIG_POWER_MA(100)
}, },
.DFU_Interface = .DFU_Interface =
@ -147,38 +147,29 @@ uint16_t CALLBACK_USB_GetDescriptor(const uint16_t wValue,
const uint8_t wIndex, const uint8_t wIndex,
const void** const DescriptorAddress) const void** const DescriptorAddress)
{ {
const uint8_t DescriptorType = (wValue >> 8); const uint8_t DescriptorType = (wValue >> 8);
const uint8_t DescriptorNumber = (wValue & 0xFF); const uint8_t DescriptorNumber = (wValue & 0xFF);
const void* Address = NULL; const void* Address = NULL;
uint16_t Size = NO_DESCRIPTOR;
switch (DescriptorType) switch (DescriptorType)
{ {
case DTYPE_Device: case DTYPE_Device:
Address = &DeviceDescriptor; Address = &DeviceDescriptor;
Size = sizeof(USB_Descriptor_Device_t);
break; break;
case DTYPE_Configuration: case DTYPE_Configuration:
Address = &ConfigurationDescriptor; Address = &ConfigurationDescriptor;
Size = sizeof(USB_Descriptor_Configuration_t);
break; break;
case DTYPE_String: case DTYPE_String:
if (!(DescriptorNumber)) if (!(DescriptorNumber))
{ Address = &LanguageString;
Address = &LanguageString;
Size = LanguageString.Header.Size;
}
else else
{ Address = &ProductString;
Address = &ProductString;
Size = ProductString.Header.Size;
}
break; break;
} }
*DescriptorAddress = Address; *DescriptorAddress = Address;
return Size; return (Address != NULL) ? ((USB_Descriptor_Header_t*)Address)->Size : NO_DESCRIPTOR;
} }

28
Bootloaders/DFU/Descriptors.h
View File

@ -137,21 +137,21 @@
*/ */
typedef struct typedef struct
{ {
USB_Descriptor_Header_t Header; /**< Standard descriptor header structure */ USB_Descriptor_Header_t Header; /**< Standard descriptor header structure */
uint8_t Attributes; /**< DFU device attributes, a mask comprising of the uint8_t Attributes; /**< DFU device attributes, a mask comprising of the
* ATTR_* macros listed in this source file * ATTR_* macros listed in this source file
*/ */
uint16_t DetachTimeout; /**< Timeout in milliseconds between a USB_DETACH uint16_t DetachTimeout; /**< Timeout in milliseconds between a USB_DETACH
* command being issued and the device detaching * command being issued and the device detaching
* from the USB bus * from the USB bus
*/ */
uint16_t TransferSize; /**< Maximum number of bytes the DFU device can accept uint16_t TransferSize; /**< Maximum number of bytes the DFU device can accept
* from the host in a transaction * from the host in a transaction
*/ */
uint16_t DFUSpecification; /**< BCD packed DFU specification number this DFU uint16_t DFUSpecification; /**< BCD packed DFU specification number this DFU
* device complies with * device complies with
*/ */
} USB_Descriptor_DFU_Functional_t; } USB_Descriptor_DFU_Functional_t;
/** Type define for the device configuration descriptor structure. This must be defined in the /** Type define for the device configuration descriptor structure. This must be defined in the