110 lines
2.0 KiB
C
110 lines
2.0 KiB
C
/*************************************************************************
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系统延时相关函数
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***************************************************************************/
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/*
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#include "stm32f4xx.h"
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#include "type.h"
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#include "os_task.h"
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#include "FreeRTOS.h"
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*/
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#include "../inc/type.h"
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#include "../inc/delay.h"
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#include "../inc/isys_com.h"
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#include <unistd.h>
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extern volatile uint32 sys_ready;
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//extern SYS_TASK sys_task;
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void delay_ms(uint32 nms)
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{
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usleep(nms*1000);
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}
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void delay_us(uint32 nus)
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{
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uint32 index = 0;
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//系统钟168M, 循环一次4条指令, 42*4 = 168 约为1us
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//系统钟396M, 循环一次4条指令, 99*4 = 396 约为1us
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//for(index = (42 * nus); index != 0; index--)
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for(index = (99 * nus); index != 0; index--)
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{
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;
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}
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//usleep(nus);
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}
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void idelay_us(uint32 nus)
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{
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usleep(nus);
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}
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/*
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void delay_us(uint32 nus)
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{
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uint32 index = 0;
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//系统钟168M, 循环一次4条指令, 42*4 = 168 约为1us
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for(index = (42 * nus); index != 0; index--)
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{
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;
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}
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}*/
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uint32 check_delay_over(uint32 *ptick,uint32 cycle)
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{
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unsigned long tick_bak = get_sys_tick();
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//printf("cur_tick =%d\n",tick_bak);
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if((*ptick)+cycle>tick_bak)//延时还没到。
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return 0;
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else
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{
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*ptick=get_sys_tick();
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return 1;
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}
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}
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void delay_ticks(uint32 ticks)
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{
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if(!ticks)
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return;
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/*if(sys_ready)
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{
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vTaskDelay(ticks);
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}
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else
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{
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uint32 index = 0;
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for(index = (41000 * OS_PER_TICK_MS*ticks); index != 0; index--)
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{
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;
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}
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}*/
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delay_ms(ticks*10);
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}
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void task_delay(uint32 nms)
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{
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uint32 task_id;
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/*if(!sys_ready)
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{
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delay_ms(nms);
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}
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get_current_task_id(&task_id);
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if(task_id>=MAX_TASK)
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return;
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sys_task.pause[task_id] = (nms+999)/1000; //转换为秒
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vTaskDelay((nms +(OS_PER_TICK_MS-1)) / OS_PER_TICK_MS); //转化为tick值 处理结果,向上对齐 最小时间为10ms
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sys_task.pause[task_id] = 0;
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*/
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usleep(nms*1000);
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}
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