ahoneybun/qmk_firmware
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Update Mass Storage bootloader so that it can support devices with only 4KB bootloader sections by creating a special AUX section before the real bootloader section to store part of the bootloader code.

Browse source
This commit is contained in:
Dean Camera 2013-03-18 17:18:11 +00:00
parent f8a1dc7424
commit be33d3a515
12 changed files with 136 additions and 109 deletions
Download patch file Download diff file Expand all files Collapse all files

42
Bootloaders/MassStorage/Descriptors.c
View file

@ -60,7 +60,7 @@ const USB_Descriptor_Device_t DeviceDescriptor =
.ManufacturerStrIndex = NO_DESCRIPTOR,
.ProductStrIndex = NO_DESCRIPTOR,
.SerialNumStrIndex = USE_INTERNAL_SERIAL,
.SerialNumStrIndex = NO_DESCRIPTOR,
.NumberOfConfigurations = FIXED_NUM_CONFIGURATIONS
};
@ -124,17 +124,6 @@ const USB_Descriptor_Configuration_t ConfigurationDescriptor =
}
};
/** Language descriptor structure. This descriptor, located in FLASH memory, is returned when the host requests
* the string descriptor with index 0 (the first index). It is actually an array of 16-bit integers, which indicate
* via the language ID table available at USB.org what languages the device supports for its string descriptors.
*/
const USB_Descriptor_String_t LanguageString =
{
.Header = {.Size = USB_STRING_LEN(1), .Type = DTYPE_String},
.UnicodeString = {LANGUAGE_ID_ENG}
};
/** This function is called by the library when in device mode, and must be overridden (see library "USB Descriptors"
* documentation) by the application code so that the address and size of a requested descriptor can be given
* to the USB library. When the device receives a Get Descriptor request on the control endpoint, this function
@ -145,30 +134,21 @@ uint16_t CALLBACK_USB_GetDescriptor(const uint16_t wValue,
const uint8_t wIndex,
const void** const DescriptorAddress)
{
const uint8_t DescriptorType = (wValue >> 8);
const uint8_t DescriptorNumber = (wValue & 0xFF);
const uint8_t DescriptorType = (wValue >> 8);
const void* Address = NULL;
uint16_t Size = NO_DESCRIPTOR;
switch (DescriptorType)
/* If/Else If chain compiles slightly smaller than a switch case */
if (DescriptorType == DTYPE_Device)
{
case DTYPE_Device:
Address = &DeviceDescriptor;
Size = sizeof(USB_Descriptor_Device_t);
break;
case DTYPE_Configuration:
Address = &ConfigurationDescriptor;
Size = sizeof(USB_Descriptor_Configuration_t);
break;
case DTYPE_String:
if (!(DescriptorNumber))
{
Address = &LanguageString;
Size = pgm_read_byte(&LanguageString.Header.Size);
}
break;
Address = &DeviceDescriptor;
Size = sizeof(USB_Descriptor_Device_t);
}
else if (DescriptorType == DTYPE_Configuration)
{
Address = &ConfigurationDescriptor;
Size = sizeof(USB_Descriptor_Configuration_t);
}
*DescriptorAddress = Address;