/****************************************************************************************
|  Description: bootloader application source file
|    File Name: main.c
|
|----------------------------------------------------------------------------------------
|                          C O P Y R I G H T
|----------------------------------------------------------------------------------------
|   Copyright (c) 2013  by Feaser    http://www.feaser.com    All rights reserved
|
|----------------------------------------------------------------------------------------
|                            L I C E N S E
|----------------------------------------------------------------------------------------
| This file is part of OpenBLT. OpenBLT is free software: you can redistribute it and/or
| modify it under the terms of the GNU General Public License as published by the Free
| Software Foundation, either version 3 of the License, or (at your option) any later
| version.
|
| OpenBLT is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
| without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
| PURPOSE. See the GNU General Public License for more details.
|
| You should have received a copy of the GNU General Public License along with OpenBLT.
| If not, see <http://www.gnu.org/licenses/>.
|
| A special exception to the GPL is included to allow you to distribute a combined work 
| that includes OpenBLT without being obliged to provide the source code for any 
| proprietary components. The exception text is included at the bottom of the license
| file <license.html>.
| 
****************************************************************************************/

/****************************************************************************************
* Include files
****************************************************************************************/
#include "boot.h"                                /* bootloader generic header          */
#include "stm32f4xx.h"                           /* STM32 registers                    */
#include "stm32f4xx_conf.h"                      /* STM32 peripheral drivers           */


/****************************************************************************************
* Function prototypes
****************************************************************************************/
static void Init(void);


/****************************************************************************************
** NAME:           main
** PARAMETER:      none
** RETURN VALUE:   none
** DESCRIPTION:    This is the entry point for the bootloader application and is called 
**                 by the reset interrupt vector after the C-startup routines executed.
**
****************************************************************************************/
void main(void)
{
  /* initialize the microcontroller */
  Init();
  /* initialize the bootloader */
  BootInit();
  
  /* start the infinite program loop */
  while (1)
  {
    /* run the bootloader task */
    BootTask();
  }
} /*** end of main ***/


/****************************************************************************************
** NAME:           Init
** PARAMETER:      none
** RETURN VALUE:   none
** DESCRIPTION:    Initializes the microcontroller. The interrupts are disabled, the
**                 clocks are configured and the flash wait states are configured.
**
****************************************************************************************/
static void Init(void)
{
#if (BOOT_COM_UART_ENABLE > 0)
  GPIO_InitTypeDef  GPIO_InitStructure;
#elif (BOOT_FILE_SYS_ENABLE > 0)
  GPIO_InitTypeDef  GPIO_InitStructure;
  USART_InitTypeDef USART_InitStructure;
#endif  

  /* disable all interrupts to prevent possible jump back to the user program */
  __disable_irq();
  /* initialize the system and its clocks */
  SystemInit();
#if (BOOT_COM_UART_ENABLE > 0)
  /* enable UART peripheral clock */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART6, ENABLE);
  /* enable GPIO peripheral clock for transmitter and receiver pins */
  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC, ENABLE);
  /* connect the pin to the peripherals alternate function */
  GPIO_PinAFConfig(GPIOC, GPIO_PinSource6, GPIO_AF_USART6);
  GPIO_PinAFConfig(GPIOC, GPIO_PinSource7, GPIO_AF_USART6);
  /* configure USART Tx as alternate function  */
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(GPIOC, &GPIO_InitStructure);
  /* configure USART Rx as alternate function */
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7;
  GPIO_Init(GPIOC, &GPIO_InitStructure);
#elif (BOOT_FILE_SYS_ENABLE > 0)
  /* enable UART peripheral clock */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART6, ENABLE);
  /* enable GPIO peripheral clock for transmitter and receiver pins */
  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC, ENABLE);
  /* connect the pin to the peripherals alternate function */
  GPIO_PinAFConfig(GPIOC, GPIO_PinSource6, GPIO_AF_USART6);
  GPIO_PinAFConfig(GPIOC, GPIO_PinSource7, GPIO_AF_USART6);
  /* configure USART Tx as alternate function  */
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(GPIOC, &GPIO_InitStructure);
  /* configure USART Rx as alternate function */
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7;
  GPIO_Init(GPIOC, &GPIO_InitStructure);
  /* initialize the uart for the specified communication speed */
  USART_InitStructure.USART_BaudRate = BOOT_COM_UART_BAUDRATE;
  USART_InitStructure.USART_WordLength = USART_WordLength_8b;
  USART_InitStructure.USART_StopBits = USART_StopBits_1;
  USART_InitStructure.USART_Parity = USART_Parity_No;
  USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
  USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
  USART_Init(USART6, &USART_InitStructure);
  /* enable UART */
  USART_Cmd(USART6, ENABLE);
#endif
} /*** end of Init ***/


/*********************************** end of main.c *************************************/