148 lines
6.6 KiB
C
148 lines
6.6 KiB
C
/************************************************************************************//**
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* \file Demo/ARMCM3_LM3S_EK_LM3S6965_Crossworks/Boot/main.c
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* \brief Bootloader application source file.
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* \ingroup Boot_ARMCM3_LM3S_EK_LM3S6965_Crossworks
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* \internal
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*----------------------------------------------------------------------------------------
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* C O P Y R I G H T
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*----------------------------------------------------------------------------------------
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* Copyright (c) 2012 by Feaser http://www.feaser.com All rights reserved
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*
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*----------------------------------------------------------------------------------------
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* L I C E N S E
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*----------------------------------------------------------------------------------------
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* This file is part of OpenBLT. OpenBLT is free software: you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as published by the Free
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* Software Foundation, either version 3 of the License, or (at your option) any later
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* version.
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*
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* OpenBLT is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU General Public License for more details.
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*
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* You have received a copy of the GNU General Public License along with OpenBLT. It
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* should be located in ".\Doc\license.html". If not, contact Feaser to obtain a copy.
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*
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* \endinternal
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****************************************************************************************/
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/****************************************************************************************
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* Include files
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****************************************************************************************/
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#include "boot.h" /* bootloader generic header */
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#include "inc/hw_ints.h"
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#include "inc/hw_memmap.h"
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#include "inc/hw_nvic.h"
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#include "inc/hw_sysctl.h"
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#include "inc/hw_types.h"
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#include "driverlib/sysctl.h"
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#include "driverlib/gpio.h"
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#if (BOOT_FILE_LOGGING_ENABLE > 0)
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#include "driverlib/uartlib.h"
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#endif
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#include "shared_params.h" /* Shared parameters header */
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/****************************************************************************************
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* Function prototypes
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****************************************************************************************/
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static void Init(void);
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/************************************************************************************//**
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** \brief This is the entry point for the bootloader application and is called
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** by the reset interrupt vector after the C-startup routines executed.
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** \return Program return code.
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**
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****************************************************************************************/
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int main(void)
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{
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blt_int8u deferredInitRequestFlag = 0;
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/* initialize the microcontroller */
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Init();
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/* initialize the shared parameters module */
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SharedParamsInit();
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/* initialize the bootloader */
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BootInit();
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#if (BOOT_COM_DEFERRED_INIT_ENABLE == 1)
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/* the bootloader is configured to NOT initialize the TCP/IP network stack by default
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* to bypass unnecessary delay times before starting the user program. the TCP/IP net-
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* work tack is now only initialized when: (a) no valid user program is detected, or
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* (b) a forced backdoor entry occurred (CpuUserProgramStartHook() returned BLT_FALSE).
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*
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* these demo bootloader and user programs have one extra feature implemented for
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* demonstration purposes. the demo user program can detect firmware update requests
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* from the TCP/IP network in which case it activates the bootloader. But...the
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* TCP/IP network stack will not be initialized in this situation. for this reason
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* the shared parameter module was integrated in both the bootloader and user program.
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* more information about the shared parameter module can be found here:
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* https://www.feaser.com/en/blog/?p=216
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*
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* the shared parameter at the first index (0) contains a flag. this flag is set to
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* 1, right before the user program activates this bootloader, to explicitly request
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* the bootloader to initialize the TCP/IP network stack. this makes it possible for
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* a firmware update to proceed. the code here reads out this flag and performs the
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* TCP/IP network stack initialization when requested.
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*/
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SharedParamsReadByIndex(0, &deferredInitRequestFlag);
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if (deferredInitRequestFlag == 1)
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{
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/* explicitly initialize all communication interface for which the deferred
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* initialization feature was enabled.
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*/
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ComDeferredInit();
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}
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#endif
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/* start the infinite program loop */
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while (1)
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{
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/* run the bootloader task */
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BootTask();
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}
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/* program should never get here */
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return 0;
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} /*** end of main ***/
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/************************************************************************************//**
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** \brief Initializes the microcontroller.
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** \return none.
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**
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****************************************************************************************/
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static void Init(void)
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{
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/* set the clocking to run at 50MHz from the PLL */
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SysCtlClockSet(SYSCTL_SYSDIV_4 | SYSCTL_USE_PLL | SYSCTL_OSC_MAIN | SYSCTL_XTAL_8MHZ);
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/* initialize the status button as a digital input. it is used to override the
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* starting of the user program.
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*/
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SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOF);
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GPIODirModeSet(GPIO_PORTF_BASE, GPIO_PIN_1, GPIO_DIR_MODE_IN);
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GPIOPadConfigSet(GPIO_PORTF_BASE, GPIO_PIN_1, GPIO_STRENGTH_2MA, GPIO_PIN_TYPE_STD_WPU);
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#if (BOOT_COM_RS232_ENABLE > 0)
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#if (BOOT_COM_RS232_CHANNEL_INDEX == 0)
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/* enable and configure UART0 related peripherals and pins */
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SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOA);
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GPIOPinTypeUART(GPIO_PORTA_BASE, GPIO_PIN_0 | GPIO_PIN_1);
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#endif
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#elif (BOOT_FILE_LOGGING_ENABLE > 0)
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/* log info strings to UART during firmware updates from local file storage */
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/* enable and configure UART0 related peripherals and pins */
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SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOA);
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GPIOPinTypeUART(GPIO_PORTA_BASE, GPIO_PIN_0 | GPIO_PIN_1);
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/* enable the UART0 peripheral */
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SysCtlPeripheralEnable(SYSCTL_PERIPH_UART0);
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/* configure the UART0 baudrate and communication parameters */
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UARTConfigSetExpClk(UART0_BASE, SysCtlClockGet(), 57600,
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(UART_CONFIG_WLEN_8 | UART_CONFIG_STOP_ONE |
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UART_CONFIG_PAR_NONE));
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#endif
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} /*** end of Init ***/
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/*********************************** end of main.c *************************************/
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