43 lines
840 B
C
43 lines
840 B
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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*/
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#include <rtthread.h>
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#include "gk7101.h"
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#include "board.h"
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/**
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* @brief System Clock Configuration
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*/
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void rt_hw_clock_init(void)
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{
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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 start_time = 0;
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rt_uint32_t end_time = 0;
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int time_difference = 0;
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start_time = gkosGetTicks();
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do
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{
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end_time = gkosGetTicks();
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time_difference = (rt_uint32_t)(end_time - start_time);
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/* check overflow */
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if(start_time > end_time)
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{
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time_difference = ((time_difference < 0L) ? -time_difference : time_difference); /* C-LIB code for labs() */
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}
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}while(time_difference < (us/1000));
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}
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