119 lines
5.0 KiB
C
119 lines
5.0 KiB
C
/****************************************************************************************
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| Description: bootloader application source file
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| File Name: main.c
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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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| 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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| 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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| You should have received a copy of the GNU General Public License along with OpenBLT.
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| If not, see <http://www.gnu.org/licenses/>.
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| A special exception to the GPL is included to allow you to distribute a combined work
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| that includes OpenBLT without being obliged to provide the source code for any
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| proprietary components. The exception text is included at the bottom of the license
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| file <license.html>.
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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 "efm32.h" /* EFM32 registers */
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#include "efm32_chip.h" /* EFM32 chip initialization */
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#include "efm32_cmu.h" /* EFM32 clock management */
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#include "efm32_gpio.h"
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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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** NAME: main
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** PARAMETER: none
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** RETURN VALUE: program return code
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** DESCRIPTION: 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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**
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****************************************************************************************/
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int main(void)
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{
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/* initialize the microcontroller */
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Init();
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/* initialize the bootloader */
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BootInit();
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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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** NAME: Init
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** PARAMETER: none
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** RETURN VALUE: none
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** DESCRIPTION: Initializes the microcontroller. The interrupts are disabled, the
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** clocks are configured and the flash wait states are configured.
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**
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****************************************************************************************/
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static void Init(void)
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{
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/* initialize the system and its clocks */
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SystemInit();
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/* handle chip errate workarounds */
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CHIP_Init();
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/* enable the low frequency crystal oscillator */
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CMU_OscillatorEnable(cmuOsc_LFXO, true, true);
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/* turn on clocking of all the modules */
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CMU->HFCORECLKEN0 |= 0x0F;
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CMU->HFPERCLKEN0 |= 0xFFFF;
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/* disable clocking of the modules that are not in use */
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CMU_ClockEnable(cmuClock_AES, false);
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CMU_ClockEnable(cmuClock_DMA, false);
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CMU_ClockEnable(cmuClock_EBI, false);
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CMU_ClockEnable(cmuClock_PRS, false);
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CMU_ClockEnable(cmuClock_USART0, false);
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CMU_ClockEnable(cmuClock_USART1, false);
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CMU_ClockEnable(cmuClock_USART2, false);
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CMU_ClockEnable(cmuClock_UART0, false);
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CMU_ClockEnable(cmuClock_ACMP0, false);
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CMU_ClockEnable(cmuClock_ACMP1, false);
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CMU_ClockEnable(cmuClock_DAC0, false);
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CMU_ClockEnable(cmuClock_ADC0, false);
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CMU_ClockEnable(cmuClock_I2C0, false);
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CMU_ClockEnable(cmuClock_VCMP, false);
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#if (BOOT_COM_UART_ENABLE > 0)
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/* enable power to U2 (RS232_PWR_E) */
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GPIO_PinModeSet(gpioPortB, 9, gpioModePushPullDrive, 1);
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/* set port B outputs to drive up to 20 mA */
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GPIO_DriveModeSet(gpioPortB, gpioDriveModeHigh);
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#endif
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} /*** end of Init ***/
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/*********************************** end of main.c *************************************/
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