73 lines
1.5 KiB
C
73 lines
1.5 KiB
C
|
/*
|
||
|
|
File Name : yc_systick.c
|
||
|
|
Author : Yichip
|
||
|
|
Version : V1.0
|
||
|
|
Date : 2018/03/27
|
||
|
|
Description : systick encapsulation.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "yc_systick.h"
|
||
|
|
|
||
|
|
tick SystickCount;
|
||
|
|
|
||
|
|
void Systick_Dealy_Ms(uint32_t MS)
|
||
|
|
{
|
||
|
|
uint32_t ReloadValue;
|
||
|
|
|
||
|
|
ReloadValue = MS * 9600;
|
||
|
|
|
||
|
|
*SYSTICK_CSR &= ~(((uint32_t)1) << SYSTICK_CSR_ENABLE);
|
||
|
|
*SYSTICK_RVR = ReloadValue; //Set the reload value
|
||
|
|
*SYSTICK_CVR = 0; //clear the current value
|
||
|
|
*SYSTICK_CSR |= ((SYSTICK_SYSCLOCK << SYSTICK_CSR_CLKSOURCE) | (1 << SYSTICK_CSR_ENABLE));
|
||
|
|
|
||
|
|
while (!(*SYSTICK_CVR == 0));
|
||
|
|
*SYSTICK_RVR = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
uint32_t SysTick_Config(uint32_t ReloadValue)
|
||
|
|
{
|
||
|
|
ReloadValue -= 1;
|
||
|
|
if (!IS_RELOAD_VALUE(ReloadValue))
|
||
|
|
return 1;
|
||
|
|
|
||
|
|
*SYSTICK_CSR &= ~(((uint32_t)1) << SYSTICK_CSR_ENABLE);
|
||
|
|
|
||
|
|
*SYSTICK_RVR = ReloadValue; //Set the reload value
|
||
|
|
*SYSTICK_CVR = 0; //clear the current value
|
||
|
|
SystickCount = 0; // Reset the overflow counter
|
||
|
|
*SYSTICK_CSR |=
|
||
|
|
((SYSTICK_SYSCLOCK << SYSTICK_CSR_CLKSOURCE) |
|
||
|
|
(1 << SYSTICK_CSR_ENABLE) |
|
||
|
|
(1 << SYSTICK_CSR_TICKINT));
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
tick SysTick_GetTick()
|
||
|
|
{
|
||
|
|
return SystickCount;
|
||
|
|
}
|
||
|
|
|
||
|
|
Boolean SysTick_IsTimeOut(tick start_tick, int interval)
|
||
|
|
{
|
||
|
|
start_tick = SysTick_GetTick() - start_tick;
|
||
|
|
if (start_tick < 0)
|
||
|
|
start_tick += TICK_MAX_VALUE;
|
||
|
|
if (((start_tick * (*SYSTICK_RVR)) / (CPU_MHZ / 1000)) >= interval)
|
||
|
|
{
|
||
|
|
return TRUE;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
return FALSE;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
uint32_t SysTick_GetRelativeTime(tick start_tick)
|
||
|
|
{
|
||
|
|
start_tick = SysTick_GetTick() - start_tick;
|
||
|
|
if (start_tick < 0)
|
||
|
|
start_tick += TICK_MAX_VALUE;
|
||
|
|
return ((start_tick * (*SYSTICK_RVR)) / (CPU_MHZ / 1000));
|
||
|
|
}
|