110 lines
2.4 KiB
C
110 lines
2.4 KiB
C
/*
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* Copyright (c) 2006-2022, 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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* 2021-01-04 iysheng first version
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* 2021-09-07 idk500 suit for Vango V85xx
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* 2021-09-08 ZhuXW add delay function
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*/
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#include <stdint.h>
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#include <rthw.h>
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#include <rtthread.h>
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#include <target.h>
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#include <board.h>
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#include <drv_usart.h>
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/*
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* System Clock Configuration
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*/
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void SystemClock_Config(void)
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{
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// SysTick_Config(SystemCoreClock / RT_TICK_PER_SECOND);
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NVIC_SetPriority(SysTick_IRQn, 0);
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CLK_InitTypeDef CLK_Struct;
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CLK_Struct.ClockType = CLK_TYPE_AHBSRC \
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|CLK_TYPE_PLLL \
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|CLK_TYPE_HCLK \
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|CLK_TYPE_PCLK;
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CLK_Struct.AHBSource = CLK_AHBSEL_LSPLL;
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CLK_Struct.PLLL.Frequency = CLK_PLLL_26_2144MHz;
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CLK_Struct.PLLL.Source = CLK_PLLLSRC_XTALL;
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CLK_Struct.PLLL.State = CLK_PLLL_ON;
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CLK_Struct.HCLK.Divider = 1;
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CLK_Struct.PCLK.Divider = 2;
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CLK_ClockConfig(&CLK_Struct);
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}
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/*
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* This is the timer interrupt service routine.
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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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/**
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* This function will initial V85xx board.
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*/
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void rt_hw_board_init()
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{
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SystemClock_Config();
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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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#if defined(RT_USING_CONSOLE) && defined(RT_USING_DEVICE)
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rt_console_set_device(RT_CONSOLE_DEVICE_NAME);
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#endif
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#ifdef BSP_USING_SDRAM
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rt_system_heap_init((void *)EXT_SDRAM_BEGIN, (void *)EXT_SDRAM_END);
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#else
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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 rt_hw_us_delay(rt_uint32_t us)
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{
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rt_uint32_t ticks;
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rt_uint32_t told, tnow, tcnt = 0;
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rt_uint32_t reload = SysTick->LOAD;
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ticks = us * reload / (1000000 / RT_TICK_PER_SECOND);
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told = SysTick->VAL;
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while (1)
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{
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tnow = SysTick->VAL;
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if (tnow != told)
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{
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if (tnow < told)
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{
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tcnt += told - tnow;
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}
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else
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{
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tcnt += reload - tnow + told;
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}
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told = tnow;
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if (tcnt >= ticks)
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{
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break;
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}
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}
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}
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}
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/*@}*/
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