openblt/Target/Demo/ARMCM3_STM32F1_Olimex_STM32P103_GCC/Boot/main.c

/************************************************************************************//**
* \file         Demo/ARMCM3_STM32F1_Olimex_STM32P103_GCC/Boot/main.c
* \brief        Bootloader application source file.
* \ingroup      Boot_ARMCM3_STM32F1_Olimex_STM32P103_GCC
* \internal
*----------------------------------------------------------------------------------------
*                          C O P Y R I G H T
*----------------------------------------------------------------------------------------
*   Copyright (c) 2012  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 have received a copy of the GNU General Public License along with OpenBLT. It 
* should be located in ".\Doc\license.html". If not, contact Feaser to obtain a copy.
* 
* \endinternal
****************************************************************************************/

/****************************************************************************************
* Include files
****************************************************************************************/
#include "boot.h"                                /* bootloader generic header          */
#include "stm32f1xx.h"                           /* STM32 registers and drivers        */
#include "stm32f1xx_ll_rcc.h"                    /* STM32 LL RCC header                */
#include "stm32f1xx_ll_bus.h"                    /* STM32 LL BUS header                */
#include "stm32f1xx_ll_system.h"                 /* STM32 LL SYSTEM header             */
#include "stm32f1xx_ll_utils.h"                  /* STM32 LL UTILS header              */
#include "stm32f1xx_ll_usart.h"                  /* STM32 LL USART header              */
#include "stm32f1xx_ll_gpio.h"                   /* STM32 LL GPIO header               */


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


/************************************************************************************//**
** \brief     This is the entry point for the bootloader application and is called 
**            by the reset interrupt vector after the C-startup routines executed.
** \return    Program return code.
**
****************************************************************************************/
int main(void)
{
  /* initialize the microcontroller */
  Init();
  /* initialize the bootloader */
  BootInit();

  /* start the infinite program loop */
  while (1)
  {
    /* run the bootloader task */
    BootTask();
  }

  /* program should never get here */
  return 0;
} /*** end of main ***/


/************************************************************************************//**
** \brief     Initializes the microcontroller. 
** \return    none.
**
****************************************************************************************/
static void Init(void)
{
  /* HAL library initialization */
  HAL_Init();
  /* configure system clock */
  SystemClock_Config();
} /*** end of Init ***/

/************************************************************************************//**
** \brief     System Clock Configuration. This code was created by CubeMX and configures
**            the system clock to match the configuration in the bootloader's
**            configuration (blt_conf.h), specifically the macros:
**            BOOT_CPU_SYSTEM_SPEED_KHZ and BOOT_CPU_XTAL_SPEED_KHZ.
**            Note that the Lower Layer drivers were selected in CubeMX for the RCC
**            subsystem.
** \return    none.
**
****************************************************************************************/
static void SystemClock_Config(void)
{
  /* Set flash latency. */
  LL_FLASH_SetLatency(LL_FLASH_LATENCY_2);
  /* Verify flash latency setting. */
  if(LL_FLASH_GetLatency() != LL_FLASH_LATENCY_2)
  {
    /* Error setting flash latency. */
    ASSERT_RT(BLT_FALSE);
  }

  /* Enable the HSE clock. */
  LL_RCC_HSE_Enable();

  /* Wait till HSE is ready */
  while(LL_RCC_HSE_IsReady() != 1)
  {
    ;
  }

  /* Configure and enable the PLL. */
  LL_RCC_PLL_ConfigDomain_SYS(LL_RCC_PLLSOURCE_HSE_DIV_1, LL_RCC_PLL_MUL_9);
  LL_RCC_PLL_Enable();

  /* Wait till PLL is ready */
  while(LL_RCC_PLL_IsReady() != 1)
  {
    ;
  }
  LL_RCC_SetAHBPrescaler(LL_RCC_SYSCLK_DIV_1);
  LL_RCC_SetAPB1Prescaler(LL_RCC_APB1_DIV_2);
  LL_RCC_SetAPB2Prescaler(LL_RCC_APB2_DIV_1);
  LL_RCC_SetSysClkSource(LL_RCC_SYS_CLKSOURCE_PLL);

  /* Wait till System clock is ready */
  while(LL_RCC_GetSysClkSource() != LL_RCC_SYS_CLKSOURCE_STATUS_PLL)
  {
    ;
  }
  /* Update the system clock speed setting. */
  LL_SetSystemCoreClock(BOOT_CPU_SYSTEM_SPEED_KHZ * 1000u);
} /*** end of SystemClock_Config ***/


/************************************************************************************//**
** \brief     Initializes the Global MSP. This function is called from HAL_Init()
**            function to perform system level initialization (GPIOs, clock, DMA,
**            interrupt).
** \return    none.
**
****************************************************************************************/
void HAL_MspInit(void)
{
  LL_GPIO_InitTypeDef GPIO_InitStruct;
#if (BOOT_FILE_LOGGING_ENABLE > 0) && (BOOT_COM_RS232_ENABLE == 0)
  LL_USART_InitTypeDef USART_InitStruct;
#endif

  /* AFIO and PWR clock enable. */
  LL_APB2_GRP1_EnableClock(LL_APB2_GRP1_PERIPH_AFIO);
  LL_APB1_GRP1_EnableClock(LL_APB1_GRP1_PERIPH_PWR);

  /* GPIO ports clock enable. */
  LL_APB2_GRP1_EnableClock(LL_APB2_GRP1_PERIPH_GPIOA);
  LL_APB2_GRP1_EnableClock(LL_APB2_GRP1_PERIPH_GPIOB);
  LL_APB2_GRP1_EnableClock(LL_APB2_GRP1_PERIPH_GPIOC);

#if (BOOT_COM_RS232_ENABLE > 0) || (BOOT_FILE_LOGGING_ENABLE > 0)
  /* UART clock enable. */
  LL_APB1_GRP1_EnableClock(LL_APB1_GRP1_PERIPH_USART2);
#endif

#if (BOOT_COM_CAN_ENABLE > 0)
  /* CAN clock enable. */
  LL_APB1_GRP1_EnableClock(LL_APB1_GRP1_PERIPH_CAN1);
#endif

  /* Configure GPIO pin for the LED. */
  GPIO_InitStruct.Pin = LL_GPIO_PIN_12;
  GPIO_InitStruct.Mode = LL_GPIO_MODE_OUTPUT;
  GPIO_InitStruct.Speed = LL_GPIO_SPEED_FREQ_LOW;
  GPIO_InitStruct.OutputType = LL_GPIO_OUTPUT_PUSHPULL;
  LL_GPIO_Init(GPIOC, &GPIO_InitStruct);
  LL_GPIO_SetOutputPin(GPIOC, LL_GPIO_PIN_12);

  /* Configure GPIO pin for (optional) backdoor entry input. */
  GPIO_InitStruct.Pin = LL_GPIO_PIN_0;
  GPIO_InitStruct.Mode = LL_GPIO_MODE_FLOATING;
  LL_GPIO_Init(GPIOA, &GPIO_InitStruct);

#if (BOOT_COM_RS232_ENABLE > 0) || (BOOT_FILE_LOGGING_ENABLE > 0)
  /* UART TX and RX GPIO pin configuration. */
  GPIO_InitStruct.Pin = LL_GPIO_PIN_2;
  GPIO_InitStruct.Mode = LL_GPIO_MODE_ALTERNATE;
  GPIO_InitStruct.Speed = LL_GPIO_SPEED_FREQ_HIGH;
  GPIO_InitStruct.OutputType = LL_GPIO_OUTPUT_PUSHPULL;
  LL_GPIO_Init(GPIOA, &GPIO_InitStruct);
  GPIO_InitStruct.Pin = LL_GPIO_PIN_3;
  GPIO_InitStruct.Mode = LL_GPIO_MODE_FLOATING;
  LL_GPIO_Init(GPIOA, &GPIO_InitStruct);
  #if (BOOT_FILE_LOGGING_ENABLE > 0) && (BOOT_COM_RS232_ENABLE == 0)
  /* configure UART peripheral */
  USART_InitStruct.BaudRate = BOOT_COM_RS232_BAUDRATE;
  USART_InitStruct.DataWidth = LL_USART_DATAWIDTH_8B;
  USART_InitStruct.StopBits = LL_USART_STOPBITS_1;
  USART_InitStruct.Parity = LL_USART_PARITY_NONE;
  USART_InitStruct.TransferDirection = LL_USART_DIRECTION_TX_RX;
  USART_InitStruct.HardwareFlowControl = LL_USART_HWCONTROL_NONE;
  /* initialize the UART peripheral */
  LL_USART_Init(USART2, &USART_InitStruct);
  LL_USART_ConfigAsyncMode(USART2);
  LL_USART_Enable(USART2);
  #endif
#endif

#if (BOOT_COM_CAN_ENABLE > 0)
  /* CAN TX and RX GPIO pin configuration. */
  GPIO_InitStruct.Pin = LL_GPIO_PIN_8;
  GPIO_InitStruct.Mode = LL_GPIO_MODE_INPUT;
  LL_GPIO_Init(GPIOB, &GPIO_InitStruct);
  GPIO_InitStruct.Pin = LL_GPIO_PIN_9;
  GPIO_InitStruct.Mode = LL_GPIO_MODE_ALTERNATE;
  GPIO_InitStruct.Speed = LL_GPIO_SPEED_FREQ_HIGH;
  GPIO_InitStruct.OutputType = LL_GPIO_OUTPUT_PUSHPULL;
  LL_GPIO_Init(GPIOB, &GPIO_InitStruct);
  /* Re-map CAN1 pins to PB8 and PB9. */
  LL_GPIO_AF_RemapPartial2_CAN1();
#endif
} /*** end of HAL_MspInit ***/


/************************************************************************************//**
** \brief     DeInitializes the Global MSP. This function is called from HAL_DeInit()
**            function to perform system level de-initialization (GPIOs, clock, DMA,
**            interrupt).
** \return    none.
**
****************************************************************************************/
void HAL_MspDeInit(void)
{
  /* Reset the RCC clock configuration to the default reset state. */
  LL_RCC_DeInit();
  
  /* Deinit used GPIOs. */
  LL_GPIO_DeInit(GPIOC);
  LL_GPIO_DeInit(GPIOB);
  LL_GPIO_DeInit(GPIOA);

#if (BOOT_COM_CAN_ENABLE > 0)
  /* CAN clock disable. */
  LL_APB1_GRP1_DisableClock(LL_APB1_GRP1_PERIPH_CAN1);
#endif

#if (BOOT_COM_RS232_ENABLE > 0) || (BOOT_FILE_LOGGING_ENABLE > 0)
  #if (BOOT_FILE_LOGGING_ENABLE > 0) && (BOOT_COM_RS232_ENABLE == 0)
  /* Disable UART peripheral */
  LL_USART_Disable(USART2);
  #endif
  /* UART clock disable. */
  LL_APB1_GRP1_DisableClock(LL_APB1_GRP1_PERIPH_USART2);
#endif

  /* GPIO ports clock disable. */
  LL_APB2_GRP1_DisableClock(LL_APB2_GRP1_PERIPH_GPIOC);
  LL_APB2_GRP1_DisableClock(LL_APB2_GRP1_PERIPH_GPIOB);
  LL_APB2_GRP1_DisableClock(LL_APB2_GRP1_PERIPH_GPIOA);

  /* AFIO and PWR clock disable. */
  LL_APB1_GRP1_DisableClock(LL_APB1_GRP1_PERIPH_PWR);
  LL_APB2_GRP1_DisableClock(LL_APB2_GRP1_PERIPH_AFIO);
} /*** end of HAL_MspDeInit ***/


/************************************************************************************//**
** \brief     This function handles the SysTick interrupt. The HAL driver is initialized
**            before the bootloader disables the global interrupts and reconfigures the
**            SysTick. It is theoretically possible that the SysTick interrupt still
**            fires before the timer driver disables it. Therefore the handler is
**            implemented here. If not, then the default handler from the C startup 
**            code is used, which hangs the system.
** \return    none.
**
****************************************************************************************/
void SysTick_Handler(void)
{
  /* Nothing to do here. */
} /*** end of SysTick_Handler ***/


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