main.c

/* *****************************************************************************
 * The MIT License
 *
 * Copyright (c) 2010 LeafLabs LLC.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 * ****************************************************************************/

/**
 *  @file main.c
 *
 *  @brief main loop and calling any hardware init stuff. timing hacks for EEPROM
 *  writes not to block usb interrupts. logic to handle 2 second timeout then
 *  jump to user code.
 *
 */

#include "common.h"
#include "dfu.h"
extern volatile dfuUploadTypes_t userUploadType;

int main()
{
    bool no_user_jump = FALSE;
    bool dont_wait=FALSE;

    systemReset(); // peripherals but not PC
    setupCLK();
    setupLEDAndButton();
    setupUSB();
    setupFLASH();

    switch(checkAndClearBootloaderFlag())
    {
        case 0x01:
            no_user_jump = TRUE;
#if defined(LED_BANK) && defined(LED_PIN) && defined(LED_ON_STATE)
            strobePin(LED_BANK, LED_PIN, STARTUP_BLINKS, BLINK_FAST,LED_ON_STATE);
#endif
        break;
        case 0x02:
            dont_wait=TRUE;
        break;
        default:
			#ifdef FASTBOOT
				dont_wait=TRUE;
			#else
				#if defined(LED_BANK) && defined(LED_PIN) && defined(LED_ON_STATE)
							strobePin(LED_BANK, LED_PIN, STARTUP_BLINKS, BLINK_FAST,LED_ON_STATE);
				#endif
			#endif            

            if (!checkUserCode(USER_CODE_FLASH0X8005000) && !checkUserCode(USER_CODE_FLASH0X8002000))
            {
                no_user_jump = TRUE;
            }
            else if (readButtonState())
            {
				no_user_jump = TRUE;
				#ifdef FASTBOOT
					dont_wait=FALSE;
				#endif
            }
        break;
    }

    if (!dont_wait)
    {
        int delay_count = 0;

        while ((delay_count++ < BOOTLOADER_WAIT) || no_user_jump)
        {
#if defined(LED_BANK) && defined(LED_PIN) && defined(LED_ON_STATE)
            strobePin(LED_BANK, LED_PIN, 1, BLINK_SLOW,LED_ON_STATE);
#endif
            if (dfuUploadStarted())
            {
                dfuFinishUpload(); // systemHardReset from DFU once done
            }
        }
    }

    if (checkUserCode(USER_CODE_FLASH0X8002000))
    {
        jumpToUser(USER_CODE_FLASH0X8002000);
    }
    else
    {
        if (checkUserCode(USER_CODE_FLASH0X8005000))
        {
            jumpToUser(USER_CODE_FLASH0X8005000);
        }
        else
        {
            // Nothing to execute in either Flash or RAM
#if defined(LED_BANK) && defined(LED_PIN) && defined(LED_ON_STATE)
            strobePin(LED_BANK, LED_PIN, 5, BLINK_FAST,LED_ON_STATE);
#endif
            systemHardReset();
        }
    }

    return 0;// Added to please the compiler
}