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https://gitee.com/dlmu-cone/tronone-h7-scaffold
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39 lines
1.1 KiB
C
39 lines
1.1 KiB
C
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#include "delayticks.h"
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/*延时函数，不会将任务挂起*/
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void delay_ticks(uint32_t delay)
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{
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/*开始计数器值*/
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uint32_t tickstart = xTaskGetTickCount();
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/*指定延时时间*/
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uint32_t wait = delay;
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/*计算当前计数器值和开始计数器值的差*/
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uint32_t ticks_diff = xTaskGetTickCount() - tickstart;
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if ( ticks_diff < wait )
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{
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/*计算剩余等待的时间*/
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uint32_t remaining_ticks = wait - ticks_diff;
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/*循环等待，直到剩余时间结束*/
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while ( ( xTaskGetTickCount() - tickstart) < wait )
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{
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/*如果发生溢出，则重新计算时间差*/
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if ( xTaskGetTickCount() < tickstart )
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{
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/*重新计算时间差*/
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ticks_diff = UINT32_MAX - tickstart + xTaskGetTickCount();
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if ( ticks_diff < wait )
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{
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remaining_ticks = wait - ticks_diff;
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}
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else
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{
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/*如果时间差已经大于等于等待时间，则退出*/
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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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