86 lines
1.9 KiB
C
86 lines
1.9 KiB
C
/*
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* Copyright (c) 2006-2021, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2017-07-24 Tanek the first version
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* 2018-11-12 Ernest Chen modify copyright
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* 2020-06-27 AHTYDHD modify to adapt in TM4C123
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*/
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#include <stdint.h>
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#include <stdbool.h>
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#include "inc/hw_sysctl.h"
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#include "inc/hw_memmap.h"
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#include "driverlib/fpu.h"
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#include "driverlib/sysctl.h"
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#include "driverlib/systick.h"
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#include "board.h"
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uint32_t SystemCoreClock;
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/* this function set the system clock */
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void SystemCoreClockUpdate(void)
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{
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FPULazyStackingEnable();
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/* Set the clocking to run directly from the crystal. 50MHz*/
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SysCtlClockSet(SYSCTL_SYSDIV_4 | SYSCTL_USE_PLL | SYSCTL_XTAL_16MHZ |
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SYSCTL_OSC_MAIN);
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SystemCoreClock = SysCtlClockGet();
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}
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/* this funtion set the Systick and enable systick int */
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void SysTickConfig()
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{
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SysTickDisable();
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SysTickPeriodSet(SystemCoreClock / RT_TICK_PER_SECOND);
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SysTickIntEnable();
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SysTickEnable();
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}
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/**
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* This function will initial your board.
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*/
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void rt_hw_board_init()
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{
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/* System Clock Update */
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SystemCoreClockUpdate();
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/* System Tick Configuration */
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SysTickConfig();
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#ifdef RT_USING_SERIAL
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rt_hw_usart_init();
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#endif
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#ifdef RT_USING_PIN
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rt_hw_pin_init();
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#endif
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#ifdef RT_USING_PWM
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rt_hw_pwm_init();
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#endif
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#ifdef RT_USING_I2C
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rt_hw_i2c_init();
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#endif
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/* Call components board initial (use INIT_BOARD_EXPORT()) */
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#ifdef RT_USING_COMPONENTS_INIT
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rt_components_board_init();
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#endif
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/* set the console device */
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rt_console_set_device(RT_CONSOLE_DEVICE_NAME);
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#if defined(RT_USING_USER_MAIN) && defined(RT_USING_HEAP)
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rt_system_heap_init((void *)HEAP_BEGIN, (void *)HEAP_END);
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#endif
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}
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void SysTick_Handler(void)
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{
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/* enter interrupt */
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rt_interrupt_enter();
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rt_tick_increase();
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/* leave interrupt */
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rt_interrupt_leave();
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}
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