/*
LUFA Library
- Copyright (C) Dean Camera, 2010.
-
+ Copyright (C) Dean Camera, 2011.
+
dean [at] fourwalledcubicle [dot] com
- www.fourwalledcubicle.com
+ www.lufa-lib.org
*/
/*
- Copyright 2010 Dean Camera (dean [at] fourwalledcubicle [dot] com)
+ Copyright 2011 Dean Camera (dean [at] fourwalledcubicle [dot] com)
- Permission to use, copy, modify, distribute, and sell this
+ Permission to use, copy, modify, distribute, and sell this
software and its documentation for any purpose is hereby granted
- without fee, provided that the above copyright notice appear in
+ without fee, provided that the above copyright notice appear in
all copies and that both that the copyright notice and this
- permission notice and warranty disclaimer appear in supporting
- documentation, and that the name of the author not be used in
- advertising or publicity pertaining to distribution of the
+ permission notice and warranty disclaimer appear in supporting
+ documentation, and that the name of the author not be used in
+ advertising or publicity pertaining to distribution of the
software without specific, written prior permission.
The author disclaim all warranties with regard to this
*
* Main source file for the CDC class bootloader. This file contains the complete bootloader logic.
*/
-
+
#define INCLUDE_FROM_BOOTLOADERCDC_C
#include "BootloaderCDC.h"
-/** Line coding options for the virtual serial port. Although the virtual serial port data is never
- * sent through a physical serial port, the line encoding data must still be read and preserved from
- * the host, or the host will detect a problem and fail to open the port. This structure contains the
- * current encoding options, including baud rate, character format, parity mode and total number of
- * bits in each data chunk.
+/** Contains the current baud rate and other settings of the first virtual serial port. This must be retained as some
+ * operating systems will not open the port unless the settings can be set successfully.
*/
-CDC_Line_Coding_t LineCoding = { .BaudRateBPS = 9600,
- .CharFormat = OneStopBit,
- .ParityType = Parity_None,
- .DataBits = 8 };
+static CDC_LineEncoding_t LineEncoding = { .BaudRateBPS = 0,
+ .CharFormat = CDC_LINEENCODING_OneStopBit,
+ .ParityType = CDC_PARITY_None,
+ .DataBits = 8 };
/** Current address counter. This stores the current address of the FLASH or EEPROM as set by the host,
* and is used when reading or writing to the AVRs memory (either FLASH or EEPROM depending on the issued
* command.)
*/
-uint32_t CurrAddress;
+static uint32_t CurrAddress;
/** Flag to indicate if the bootloader should be running, or should exit and allow the application code to run
* via a watchdog reset. When cleared the bootloader will exit, starting the watchdog and entering an infinite
* loop until the AVR restarts and the application runs.
*/
-bool RunBootloader = true;
+static bool RunBootloader = true;
-/** Main program entry point. This routine configures the hardware required by the bootloader, then continuously
+/** Main program entry point. This routine configures the hardware required by the bootloader, then continuously
* runs the bootloader processing routine until instructed to soft-exit, or hard-reset via the watchdog to start
* the loaded application code.
*/
CDC_Task();
USB_USBTask();
}
-
+
/* Disconnect from the host - USB interface will be reset later along with the AVR */
USB_Detach();
/* Disable clock division */
clock_prescale_set(clock_div_1);
-
+
/* Relocate the interrupt vector table to the bootloader section */
MCUCR = (1 << IVCE);
MCUCR = (1 << IVSEL);
-
+
/* Initialize USB Subsystem */
USB_Init();
}
{
/* Setup CDC Notification, Rx and Tx Endpoints */
Endpoint_ConfigureEndpoint(CDC_NOTIFICATION_EPNUM, EP_TYPE_INTERRUPT,
- ENDPOINT_DIR_IN, CDC_NOTIFICATION_EPSIZE,
+ ENDPOINT_DIR_IN, CDC_NOTIFICATION_EPSIZE,
ENDPOINT_BANK_SINGLE);
Endpoint_ConfigureEndpoint(CDC_TX_EPNUM, EP_TYPE_BULK,
- ENDPOINT_DIR_IN, CDC_TXRX_EPSIZE,
+ ENDPOINT_DIR_IN, CDC_TXRX_EPSIZE,
ENDPOINT_BANK_SINGLE);
Endpoint_ConfigureEndpoint(CDC_RX_EPNUM, EP_TYPE_BULK,
- ENDPOINT_DIR_OUT, CDC_TXRX_EPSIZE,
+ ENDPOINT_DIR_OUT, CDC_TXRX_EPSIZE,
ENDPOINT_BANK_SINGLE);
}
-/** Event handler for the USB_UnhandledControlRequest event. This is used to catch standard and class specific
- * control requests that are not handled internally by the USB library, so that they can be handled appropriately
- * for the application.
+/** Event handler for the USB_ControlRequest event. This is used to catch and process control requests sent to
+ * the device from the USB host before passing along unhandled control requests to the library for processing
+ * internally.
*/
-void EVENT_USB_Device_UnhandledControlRequest(void)
+void EVENT_USB_Device_ControlRequest(void)
{
- uint8_t* LineCodingData = (uint8_t*)&LineCoding;
+ /* Ignore any requests that aren't directed to the CDC interface */
+ if ((USB_ControlRequest.bmRequestType & (CONTROL_REQTYPE_TYPE | CONTROL_REQTYPE_RECIPIENT)) !=
+ (REQTYPE_CLASS | REQREC_INTERFACE))
+ {
+ return;
+ }
/* Process CDC specific control requests */
switch (USB_ControlRequest.bRequest)
{
- case REQ_GetLineEncoding:
+ case CDC_REQ_GetLineEncoding:
if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))
{
Endpoint_ClearSETUP();
- for (uint8_t i = 0; i < sizeof(LineCoding); i++)
- Endpoint_Write_Byte(*(LineCodingData++));
-
- Endpoint_ClearIN();
-
- Endpoint_ClearStatusStage();
- }
-
- break;
- case REQ_SetLineEncoding:
- if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE))
- {
- Endpoint_ClearSETUP();
-
- while (!(Endpoint_IsOUTReceived()))
- {
- if (USB_DeviceState == DEVICE_STATE_Unattached)
- return;
- }
-
- for (uint8_t i = 0; i < sizeof(LineCoding); i++)
- *(LineCodingData++) = Endpoint_Read_Byte();
-
+ /* Write the line coding data to the control endpoint */
+ Endpoint_Write_Control_Stream_LE(&LineEncoding, sizeof(CDC_LineEncoding_t));
Endpoint_ClearOUT();
-
- Endpoint_ClearStatusStage();
}
-
+
break;
- case REQ_SetControlLineState:
+ case CDC_REQ_SetLineEncoding:
if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE))
{
Endpoint_ClearSETUP();
-
- Endpoint_ClearStatusStage();
+
+ /* Read the line coding data in from the host into the global struct */
+ Endpoint_Read_Control_Stream_LE(&LineEncoding, sizeof(CDC_LineEncoding_t));
+ Endpoint_ClearIN();
}
-
+
break;
}
}
+#if !defined(NO_BLOCK_SUPPORT)
/** Reads or writes a block of EEPROM or FLASH memory to or from the appropriate CDC data endpoint, depending
* on the AVR910 protocol command issued.
*
{
uint16_t BlockSize;
char MemoryType;
-
+
bool HighByte = false;
uint8_t LowByte = 0;
-
+
BlockSize = (FetchNextCommandByte() << 8);
BlockSize |= FetchNextCommandByte();
-
+
MemoryType = FetchNextCommandByte();
if ((MemoryType != 'E') && (MemoryType != 'F'))
{
/* Send error byte back to the host */
WriteNextResponseByte('?');
-
+
return;
}
#if (FLASHEND > 0xFFFF)
WriteNextResponseByte(pgm_read_byte_far(CurrAddress | HighByte));
#else
- WriteNextResponseByte(pgm_read_byte(CurrAddress | HighByte));
+ WriteNextResponseByte(pgm_read_byte(CurrAddress | HighByte));
#endif
-
+
/* If both bytes in current word have been read, increment the address counter */
if (HighByte)
CurrAddress += 2;
-
+
HighByte = !HighByte;
}
else
{
/* Read the next EEPROM byte into the endpoint */
- WriteNextResponseByte(eeprom_read_byte((uint8_t*)(uint16_t)(CurrAddress >> 1)));
+ WriteNextResponseByte(eeprom_read_byte((uint8_t*)(intptr_t)(CurrAddress >> 1)));
/* Increment the address counter after use */
CurrAddress += 2;
- }
+ }
}
}
else
boot_page_erase(PageStartAddress);
boot_spm_busy_wait();
}
-
+
while (BlockSize--)
{
if (MemoryType == 'F')
- {
+ {
/* If both bytes in current word have been written, increment the address counter */
if (HighByte)
{
/* Increment the address counter after use */
CurrAddress += 2;
-
- HighByte = false;
}
else
{
LowByte = FetchNextCommandByte();
-
- HighByte = true;
}
+
+ HighByte = !HighByte;
}
else
{
/* Write the next EEPROM byte from the endpoint */
- eeprom_write_byte((uint8_t*)(uint16_t)(CurrAddress >> 1), FetchNextCommandByte());
+ eeprom_write_byte((uint8_t*)((intptr_t)(CurrAddress >> 1)), FetchNextCommandByte());
/* Increment the address counter after use */
CurrAddress += 2;
{
/* Commit the flash page to memory */
boot_page_write(PageStartAddress);
-
+
/* Wait until write operation has completed */
boot_spm_busy_wait();
}
-
+
/* Send response byte back to the host */
- WriteNextResponseByte('\r');
+ WriteNextResponseByte('\r');
}
}
+#endif
/** Retrieves the next byte from the host in the CDC data OUT endpoint, and clears the endpoint bank if needed
* to allow reception of the next data packet from the host.
{
/* Select the OUT endpoint so that the next data byte can be read */
Endpoint_SelectEndpoint(CDC_RX_EPNUM);
-
+
/* If OUT endpoint empty, clear it and wait for the next packet from the host */
while (!(Endpoint_IsReadWriteAllowed()))
{
return 0;
}
}
-
+
/* Fetch the next byte from the OUT endpoint */
return Endpoint_Read_Byte();
}
{
/* Select the IN endpoint so that the next data byte can be written */
Endpoint_SelectEndpoint(CDC_TX_EPNUM);
-
+
/* If IN endpoint full, clear it and wait until ready for the next packet to the host */
if (!(Endpoint_IsReadWriteAllowed()))
{
Endpoint_ClearIN();
-
+
while (!(Endpoint_IsINReady()))
- {
+ {
if (USB_DeviceState == DEVICE_STATE_Unattached)
return;
}
}
-
- /* Write the next byte to the OUT endpoint */
+
+ /* Write the next byte to the IN endpoint */
Endpoint_Write_Byte(Response);
}
{
/* Select the OUT endpoint */
Endpoint_SelectEndpoint(CDC_RX_EPNUM);
-
+
/* Check if endpoint has a command in it sent from the host */
- if (Endpoint_IsOUTReceived())
- {
- /* Read in the bootloader command (first byte sent from host) */
- uint8_t Command = FetchNextCommandByte();
+ if (!(Endpoint_IsOUTReceived()))
+ return;
- if ((Command == 'L') || (Command == 'P') || (Command == 'T') || (Command == 'E'))
- {
- if (Command == 'E')
- RunBootloader = false;
- if (Command == 'T')
- FetchNextCommandByte();
+ /* Read in the bootloader command (first byte sent from host) */
+ uint8_t Command = FetchNextCommandByte();
- /* Send confirmation byte back to the host */
- WriteNextResponseByte('\r');
- }
- else if (Command == 't')
- {
- /* Return ATMEGA128 part code - this is only to allow AVRProg to use the bootloader */
- WriteNextResponseByte(0x44);
+ if (Command == 'E')
+ {
+ RunBootloader = false;
+
+ /* Send confirmation byte back to the host */
+ WriteNextResponseByte('\r');
+ }
+ else if (Command == 'T')
+ {
+ FetchNextCommandByte();
- WriteNextResponseByte(0x00);
- }
- else if (Command == 'a')
- {
- /* Indicate auto-address increment is supported */
- WriteNextResponseByte('Y');
- }
- else if (Command == 'A')
- {
- /* Set the current address to that given by the host */
- CurrAddress = (FetchNextCommandByte() << 9);
- CurrAddress |= (FetchNextCommandByte() << 1);
+ /* Send confirmation byte back to the host */
+ WriteNextResponseByte('\r');
+ }
+ else if ((Command == 'L') || (Command == 'P'))
+ {
+ /* Send confirmation byte back to the host */
+ WriteNextResponseByte('\r');
+ }
+ else if (Command == 't')
+ {
+ /* Return ATMEGA128 part code - this is only to allow AVRProg to use the bootloader */
+ WriteNextResponseByte(0x44);
+ WriteNextResponseByte(0x00);
+ }
+ else if (Command == 'a')
+ {
+ /* Indicate auto-address increment is supported */
+ WriteNextResponseByte('Y');
+ }
+ else if (Command == 'A')
+ {
+ /* Set the current address to that given by the host */
+ CurrAddress = (FetchNextCommandByte() << 9);
+ CurrAddress |= (FetchNextCommandByte() << 1);
- /* Send confirmation byte back to the host */
- WriteNextResponseByte('\r');
- }
- else if (Command == 'p')
- {
- /* Indicate serial programmer back to the host */
- WriteNextResponseByte('S');
- }
- else if (Command == 'S')
- {
- /* Write the 7-byte software identifier to the endpoint */
- for (uint8_t CurrByte = 0; CurrByte < 7; CurrByte++)
- WriteNextResponseByte(SOFTWARE_IDENTIFIER[CurrByte]);
- }
- else if (Command == 'V')
- {
- WriteNextResponseByte('0' + BOOTLOADER_VERSION_MAJOR);
- WriteNextResponseByte('0' + BOOTLOADER_VERSION_MINOR);
- }
- else if (Command == 's')
- {
- WriteNextResponseByte(AVR_SIGNATURE_3);
- WriteNextResponseByte(AVR_SIGNATURE_2);
- WriteNextResponseByte(AVR_SIGNATURE_1);
- }
- else if (Command == 'b')
+ /* Send confirmation byte back to the host */
+ WriteNextResponseByte('\r');
+ }
+ else if (Command == 'p')
+ {
+ /* Indicate serial programmer back to the host */
+ WriteNextResponseByte('S');
+ }
+ else if (Command == 'S')
+ {
+ /* Write the 7-byte software identifier to the endpoint */
+ for (uint8_t CurrByte = 0; CurrByte < 7; CurrByte++)
+ WriteNextResponseByte(SOFTWARE_IDENTIFIER[CurrByte]);
+ }
+ else if (Command == 'V')
+ {
+ WriteNextResponseByte('0' + BOOTLOADER_VERSION_MAJOR);
+ WriteNextResponseByte('0' + BOOTLOADER_VERSION_MINOR);
+ }
+ else if (Command == 's')
+ {
+ WriteNextResponseByte(AVR_SIGNATURE_3);
+ WriteNextResponseByte(AVR_SIGNATURE_2);
+ WriteNextResponseByte(AVR_SIGNATURE_1);
+ }
+ else if (Command == 'e')
+ {
+ /* Clear the application section of flash */
+ for (uint32_t CurrFlashAddress = 0; CurrFlashAddress < BOOT_START_ADDR; CurrFlashAddress += SPM_PAGESIZE)
{
- WriteNextResponseByte('Y');
-
- /* Send block size to the host */
- WriteNextResponseByte(SPM_PAGESIZE >> 8);
- WriteNextResponseByte(SPM_PAGESIZE & 0xFF);
+ boot_page_erase(CurrFlashAddress);
+ boot_spm_busy_wait();
+ boot_page_write(CurrFlashAddress);
+ boot_spm_busy_wait();
}
- else if (Command == 'e')
- {
- /* Clear the application section of flash */
- for (uint32_t CurrFlashAddress = 0; CurrFlashAddress < BOOT_START_ADDR; CurrFlashAddress++)
- {
- boot_page_erase(CurrFlashAddress);
- boot_spm_busy_wait();
- boot_page_write(CurrFlashAddress);
- boot_spm_busy_wait();
- CurrFlashAddress += SPM_PAGESIZE;
- }
-
- /* Send confirmation byte back to the host */
- WriteNextResponseByte('\r');
- }
- else if (Command == 'l')
- {
- /* Set the lock bits to those given by the host */
- boot_lock_bits_set(FetchNextCommandByte());
+ /* Send confirmation byte back to the host */
+ WriteNextResponseByte('\r');
+ }
+ #if !defined(NO_LOCK_BYTE_WRITE_SUPPORT)
+ else if (Command == 'l')
+ {
+ /* Set the lock bits to those given by the host */
+ boot_lock_bits_set(FetchNextCommandByte());
- /* Send confirmation byte back to the host */
- WriteNextResponseByte('\r');
- }
- else if (Command == 'r')
- {
- WriteNextResponseByte(boot_lock_fuse_bits_get(GET_LOCK_BITS));
- }
- else if (Command == 'F')
- {
- WriteNextResponseByte(boot_lock_fuse_bits_get(GET_LOW_FUSE_BITS));
- }
- else if (Command == 'N')
- {
- WriteNextResponseByte(boot_lock_fuse_bits_get(GET_HIGH_FUSE_BITS));
- }
- else if (Command == 'Q')
- {
- WriteNextResponseByte(boot_lock_fuse_bits_get(GET_EXTENDED_FUSE_BITS));
- }
- else if (Command == 'C')
- {
- /* Write the high byte to the current flash page */
- boot_page_fill(CurrAddress, FetchNextCommandByte());
+ /* Send confirmation byte back to the host */
+ WriteNextResponseByte('\r');
+ }
+ #endif
+ else if (Command == 'r')
+ {
+ WriteNextResponseByte(boot_lock_fuse_bits_get(GET_LOCK_BITS));
+ }
+ else if (Command == 'F')
+ {
+ WriteNextResponseByte(boot_lock_fuse_bits_get(GET_LOW_FUSE_BITS));
+ }
+ else if (Command == 'N')
+ {
+ WriteNextResponseByte(boot_lock_fuse_bits_get(GET_HIGH_FUSE_BITS));
+ }
+ else if (Command == 'Q')
+ {
+ WriteNextResponseByte(boot_lock_fuse_bits_get(GET_EXTENDED_FUSE_BITS));
+ }
+ #if !defined(NO_BLOCK_SUPPORT)
+ else if (Command == 'b')
+ {
+ WriteNextResponseByte('Y');
- /* Send confirmation byte back to the host */
- WriteNextResponseByte('\r');
- }
- else if (Command == 'c')
- {
- /* Write the low byte to the current flash page */
- boot_page_fill(CurrAddress | 1, FetchNextCommandByte());
-
- /* Increment the address */
- CurrAddress += 2;
-
- /* Send confirmation byte back to the host */
- WriteNextResponseByte('\r');
- }
- else if (Command == 'm')
- {
- /* Commit the flash page to memory */
- boot_page_write(CurrAddress);
-
- /* Wait until write operation has completed */
- boot_spm_busy_wait();
+ /* Send block size to the host */
+ WriteNextResponseByte(SPM_PAGESIZE >> 8);
+ WriteNextResponseByte(SPM_PAGESIZE & 0xFF);
+ }
+ else if ((Command == 'B') || (Command == 'g'))
+ {
+ /* Delegate the block write/read to a separate function for clarity */
+ ReadWriteMemoryBlock(Command);
+ }
+ #endif
+ #if !defined(NO_FLASH_BYTE_SUPPORT)
+ else if (Command == 'C')
+ {
+ /* Write the high byte to the current flash page */
+ boot_page_fill(CurrAddress, FetchNextCommandByte());
- /* Send confirmation byte back to the host */
- WriteNextResponseByte('\r');
- }
- else if ((Command == 'B') || (Command == 'g'))
- {
- /* Delegate the block write/read to a separate function for clarity */
- ReadWriteMemoryBlock(Command);
- }
- else if (Command == 'R')
- {
- #if (FLASHEND > 0xFFFF)
- uint16_t ProgramWord = pgm_read_word_far(CurrAddress);
- #else
- uint16_t ProgramWord = pgm_read_word(CurrAddress);
- #endif
-
- WriteNextResponseByte(ProgramWord >> 8);
- WriteNextResponseByte(ProgramWord & 0xFF);
- }
- else if (Command == 'D')
- {
- /* Read the byte from the endpoint and write it to the EEPROM */
- eeprom_write_byte((uint8_t*)((uint16_t)(CurrAddress >> 1)), FetchNextCommandByte());
-
- /* Increment the address after use */
- CurrAddress += 2;
-
- /* Send confirmation byte back to the host */
- WriteNextResponseByte('\r');
- }
- else if (Command == 'd')
- {
- /* Read the EEPROM byte and write it to the endpoint */
- WriteNextResponseByte(eeprom_read_byte((uint8_t*)((uint16_t)(CurrAddress >> 1))));
+ /* Send confirmation byte back to the host */
+ WriteNextResponseByte('\r');
+ }
+ else if (Command == 'c')
+ {
+ /* Write the low byte to the current flash page */
+ boot_page_fill(CurrAddress | 0x01, FetchNextCommandByte());
- /* Increment the address after use */
- CurrAddress += 2;
- }
- else if (Command == 27)
- {
- /* Escape is sync, ignore */
- }
- else
- {
- /* Unknown command, return fail code */
- WriteNextResponseByte('?');
- }
+ /* Increment the address */
+ CurrAddress += 2;
- /* Select the IN endpoint */
- Endpoint_SelectEndpoint(CDC_TX_EPNUM);
+ /* Send confirmation byte back to the host */
+ WriteNextResponseByte('\r');
+ }
+ else if (Command == 'm')
+ {
+ /* Commit the flash page to memory */
+ boot_page_write(CurrAddress);
- /* Remember if the endpoint is completely full before clearing it */
- bool IsEndpointFull = !(Endpoint_IsReadWriteAllowed());
+ /* Wait until write operation has completed */
+ boot_spm_busy_wait();
- /* Send the endpoint data to the host */
- Endpoint_ClearIN();
-
- /* If a full endpoint's worth of data was sent, we need to send an empty packet afterwards to signal end of transfer */
- if (IsEndpointFull)
- {
- while (!(Endpoint_IsINReady()))
- {
- if (USB_DeviceState == DEVICE_STATE_Unattached)
- return;
- }
+ /* Send confirmation byte back to the host */
+ WriteNextResponseByte('\r');
+ }
+ else if (Command == 'R')
+ {
+ #if (FLASHEND > 0xFFFF)
+ uint16_t ProgramWord = pgm_read_word_far(CurrAddress);
+ #else
+ uint16_t ProgramWord = pgm_read_word(CurrAddress);
+ #endif
+
+ WriteNextResponseByte(ProgramWord >> 8);
+ WriteNextResponseByte(ProgramWord & 0xFF);
+ }
+ #endif
+ #if !defined(NO_EEPROM_BYTE_SUPPORT)
+ else if (Command == 'D')
+ {
+ /* Read the byte from the endpoint and write it to the EEPROM */
+ eeprom_write_byte((uint8_t*)((intptr_t)(CurrAddress >> 1)), FetchNextCommandByte());
- Endpoint_ClearIN();
- }
+ /* Increment the address after use */
+ CurrAddress += 2;
- /* Wait until the data has been sent to the host */
+ /* Send confirmation byte back to the host */
+ WriteNextResponseByte('\r');
+ }
+ else if (Command == 'd')
+ {
+ /* Read the EEPROM byte and write it to the endpoint */
+ WriteNextResponseByte(eeprom_read_byte((uint8_t*)((intptr_t)(CurrAddress >> 1))));
+
+ /* Increment the address after use */
+ CurrAddress += 2;
+ }
+ #endif
+ else if (Command != 27)
+ {
+ /* Unknown (non-sync) command, return fail code */
+ WriteNextResponseByte('?');
+ }
+
+ /* Select the IN endpoint */
+ Endpoint_SelectEndpoint(CDC_TX_EPNUM);
+
+ /* Remember if the endpoint is completely full before clearing it */
+ bool IsEndpointFull = !(Endpoint_IsReadWriteAllowed());
+
+ /* Send the endpoint data to the host */
+ Endpoint_ClearIN();
+
+ /* If a full endpoint's worth of data was sent, we need to send an empty packet afterwards to signal end of transfer */
+ if (IsEndpointFull)
+ {
while (!(Endpoint_IsINReady()))
- {
+ {
if (USB_DeviceState == DEVICE_STATE_Unattached)
return;
}
-
- /* Select the OUT endpoint */
- Endpoint_SelectEndpoint(CDC_RX_EPNUM);
- /* Acknowledge the command from the host */
- Endpoint_ClearOUT();
+ Endpoint_ClearIN();
+ }
+
+ /* Wait until the data has been sent to the host */
+ while (!(Endpoint_IsINReady()))
+ {
+ if (USB_DeviceState == DEVICE_STATE_Unattached)
+ return;
}
+
+ /* Select the OUT endpoint */
+ Endpoint_SelectEndpoint(CDC_RX_EPNUM);
+
+ /* Acknowledge the command from the host */
+ Endpoint_ClearOUT();
}
+
projects / pub / USBasp.git / blobdiff