dc31-addon-addon-badge-firm.../badge_firmware/driver/Debug/systick_delay.c

72 lines
2.4 KiB
C

#include "systick_delay.h"
#include "hk32f030m.h"
static uint32_t fac_us = 0;
static uint32_t fac_ms = 0;
/*******************************************************************************
* Function Name : SysTick_Init
* Description : SysTick Initialize
* Input : none
* Output : none
* Return : none
* Set SysTick clock source to 1/8 of HCLK
*******************************************************************************/
void SysTick_Init(void)
{
SysTick_CLKSourceConfig(SysTick_CLKSource_HCLK_Div8);
fac_us = SystemCoreClock / 8000000;
fac_ms = SystemCoreClock / 8000;
}
/*******************************************************************************
* Function Name : SysTick_DelayUs
* Description : delay by microseconds
* Input : nus -- number of microseconds
* Output : none
* Return : none
*******************************************************************************/
void SysTick_DelayUs(uint32_t nus)
{
uint32_t temp;
if (nus > 0)
{
SysTick->LOAD = nus * fac_us; // Set Reload Value
SysTick->VAL = 0x00; // Set Current Value to 0
SysTick->CTRL |= SysTick_CTRL_ENABLE_Msk; // Start counter
// Block when SysTick is running and counter flag not set
do
{
temp = SysTick->CTRL;
}
while ((temp & SysTick_CTRL_ENABLE_Msk) && !(temp & SysTick_CTRL_COUNTFLAG_Msk));
SysTick->CTRL &= ~SysTick_CTRL_ENABLE_Msk; // Stop counter
}
}
/*******************************************************************************
* Function Name : SysTick_DelayMs
* Description : Delay by milliseconds
SysTick->LOAD is 24-bit so the max delay = 0xFFFFFF*8*1000 / SYSCLK
* Input : nms -- number of milliseconds
*******************************************************************************/
void SysTick_DelayMs(uint16_t nms)
{
uint32_t temp;
if (nms > 0)
{
SysTick->LOAD = nms * fac_ms; // Set Reload Value (24-bit)
SysTick->VAL = 0x00; // Set Current Value to 0
SysTick->CTRL |= SysTick_CTRL_ENABLE_Msk; // Start counter
// Block when SysTick is running and counter flag not set
do
{
temp = SysTick->CTRL;
}
while ((temp & SysTick_CTRL_ENABLE_Msk) && !(temp & SysTick_CTRL_COUNTFLAG_Msk));
SysTick->CTRL &= ~SysTick_CTRL_ENABLE_Msk; // Stop counter
}
}