+++ /dev/null
-/*
- LUFA Library
- Copyright (C) Dean Camera, 2010.
-
- dean [at] fourwalledcubicle [dot] com
- www.fourwalledcubicle.com
-*/
-
-/*
- Copyright 2010 Dean Camera (dean [at] fourwalledcubicle [dot] com)
-
- 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
- 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
- software without specific, written prior permission.
-
- The author disclaim all warranties with regard to this
- software, including all implied warranties of merchantability
- and fitness. In no event shall the author be liable for any
- special, indirect or consequential damages or any damages
- whatsoever resulting from loss of use, data or profits, whether
- in an action of contract, negligence or other tortious action,
- arising out of or in connection with the use or performance of
- this software.
-*/
-
-/** \file
- *
- * Main source file for the TeensyHID bootloader. This file contains the complete bootloader logic.
- */
-
-#include "TeensyHID.h"
-
-/** Flag to indicate if the bootloader should be running, or should exit and allow the application code to run
- * via a soft reset. When cleared, the bootloader will abort, the USB interface will shut down and the application
- * started via a forced watchdog reset.
- */
-bool RunBootloader = true;
-
-/** 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.
- */
-int main(void)
-{
- /* Setup hardware required for the bootloader */
- SetupHardware();
-
- /* Enable global interrupts so that the USB stack can function */
- sei();
-
- while (RunBootloader)
- USB_USBTask();
-
- /* Disconnect from the host - USB interface will be reset later along with the AVR */
- USB_Detach();
-
- /* Enable the watchdog and force a timeout to reset the AVR */
- wdt_enable(WDTO_250MS);
-
- for (;;);
-}
-
-/** Configures all hardware required for the bootloader. */
-void SetupHardware(void)
-{
- /* Disable watchdog if enabled by bootloader/fuses */
- MCUSR &= ~(1 << WDRF);
- wdt_disable();
-
- /* Relocate the interrupt vector table to the bootloader section */
- MCUCR = (1 << IVCE);
- MCUCR = (1 << IVSEL);
-
- /* Initialize USB subsystem */
- USB_Init();
-}
-
-/** Event handler for the USB_ConfigurationChanged event. This configures the device's endpoints ready
- * to relay data to and from the attached USB host.
- */
-void EVENT_USB_Device_ConfigurationChanged(void)
-{
- /* Setup HID Report Endpoint */
- Endpoint_ConfigureEndpoint(HID_EPNUM, EP_TYPE_INTERRUPT,
- ENDPOINT_DIR_IN, HID_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 (including the HID commands, which are
- * all issued via the control endpoint), so that they can be handled appropriately for the application.
- */
-void EVENT_USB_Device_UnhandledControlRequest(void)
-{
- /* Handle HID Class specific requests */
- switch (USB_ControlRequest.bRequest)
- {
- case REQ_SetReport:
- Endpoint_ClearSETUP();
-
- /* Wait until the command has been sent by the host */
- while (!(Endpoint_IsOUTReceived()));
-
- /* Read in the write destination index */
- uint16_t PageIndex = Endpoint_Read_Word_LE();
-
- /* Check if the command is a program page command, or a start application command */
- if (PageIndex == TEENSY_STARTAPPLICATION)
- {
- RunBootloader = false;
- }
- else
- {
- #if (FLASHEND > 0xFFFF)
- uint32_t PageByteAddress = ((uint32_t)PageIndex << 8);
- #else
- uint16_t PageByteAddress = PageIndex;
- #endif
-
- /* Erase the given FLASH page, ready to be programmed */
- boot_page_erase(PageByteAddress);
- boot_spm_busy_wait();
-
- /* Write each of the FLASH page's bytes in sequence */
- #if (SPM_PAGESIZE == 128)
- for (uint8_t PageByte = 0; PageByte < SPM_PAGESIZE; PageByte += 2)
- #else
- for (uint16_t PageByte = 0; PageByte < SPM_PAGESIZE; PageByte += 2)
- #endif
- {
- /* Check if endpoint is empty - if so clear it and wait until ready for next packet */
- if (!(Endpoint_BytesInEndpoint()))
- {
- Endpoint_ClearOUT();
- while (!(Endpoint_IsOUTReceived()));
- }
-
- /* Write the next data word to the FLASH page */
- boot_page_fill(PageByteAddress + PageByte, Endpoint_Read_Word_LE());
- }
-
- /* Write the filled FLASH page to memory */
- boot_page_write(PageByteAddress);
- boot_spm_busy_wait();
- }
-
- Endpoint_ClearOUT();
-
- Endpoint_ClearStatusStage();
-
- break;
- }
-}
projects / pub / lufa.git / blobdiff