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