/* * Copyright (C) 2018 Shanghai Eastsoft Microelectronics Co., Ltd. * * SPDX-License-Identifier: Apache-2.0 * * Change Logs: * Date Author Notes * 2019-03-01 wangyq the first version */ #include <rthw.h> #include <rtthread.h> #include "board.h" #include "drv_uart.h" #include "drv_gpio.h" #include <ald_cmu.h> #include <ald_gpio.h> /** * @addtogroup es32f0 */ /*@{*/ /******************************************************************************* * Function Name : NVIC_Configuration * Description : Configures Vector Table base location. * Input : None * Output : None * Return : None *******************************************************************************/ void NVIC_Configuration(void) { } /******************************************************************************* * Function Name : SystemClock_Configuration * Description : Configures the System Clock. * Input : None * Output : None * Return : None *******************************************************************************/ void SystemClock_Config(void) { /* hosc 12MHz, from hosc/3 pll to 48MHz */ cmu_pll1_config(CMU_PLL1_INPUT_HOSC_3, CMU_PLL1_OUTPUT_48M); /* MCLK 48MHz */ cmu_clock_config(CMU_CLOCK_PLL1, 48000000); } /******************************************************************************* * Function Name : SysTick_Configuration * Description : Configures the SysTick for OS tick. * Input : None * Output : None * Return : None *******************************************************************************/ void SysTick_Configuration(void) { /* ticks = sysclk / RT_TICK_PER_SECOND */ SysTick_Config(cmu_get_sys_clock() / RT_TICK_PER_SECOND); } /** * This is the timer interrupt service routine. * */ void systick_irq_cbk(void) { /* enter interrupt */ rt_interrupt_enter(); rt_tick_increase(); /* leave interrupt */ rt_interrupt_leave(); } /*@}*/ /** * This function will initial ES32F0 board. */ void rt_hw_board_init(void) { /* NVIC Configuration */ NVIC_Configuration(); /*System Clock Configuration */ SystemClock_Config(); /* Configure the SysTick */ SysTick_Configuration(); #ifdef RT_USING_HEAP rt_system_heap_init((void *)HEAP_BEGIN, (void *)HEAP_END); #endif #ifdef RT_USING_COMPONENTS_INIT rt_components_board_init(); #endif #ifdef RT_USING_CONSOLE rt_console_set_device(RT_CONSOLE_DEVICE_NAME); #endif } /** * This function will delay for some us. * * @param us the delay time of us */ void rt_hw_us_delay(rt_uint32_t us) { unsigned int start, now, delta, reload, us_tick; start = SysTick->VAL; reload = SysTick->LOAD; us_tick = cmu_get_sys_clock() / 1000000UL; do { now = SysTick->VAL; delta = start > now ? start - now : reload + start - now; } while (delta < us_tick * us); }