SmartPDCode/GD32F427/core/systick.c

#include "gd32f4xx.h"
#include "systick.h"
#include "FreeRTOS.h"


__IO uint32_t uwTick;

#define SYS_SUPPORT_OS 1

volatile static uint32_t delay;

/*!
    \brief    configure systick
    \param[in]  none
    \param[out] none
    \retval     none
*/
void systick_config(void)
{
    /* setup systick timer for 1000Hz interrupts */
    if(SysTick_Config(SystemCoreClock / 1000U)) {
        /* capture error */
        while(1) {
        }
    }
    /* configure the systick handler priority */
    NVIC_SetPriority(SysTick_IRQn, 0x15U);
}





/*!
    \brief    delay a time in milliseconds
    \param[in]  count: count in milliseconds
    \param[out] none
    \retval     none
*/
void delay_1ms(uint32_t count)
{
    delay = count;

    while(0U != delay) {
    }
}

/*!
    \brief    delay decrement
    \param[in]  none
    \param[out] none
    \retval     none
*/
void delay_decrement(void)
{
    if(0U != delay) {
        delay--;
    }
		uwTick += 1;
}
void delay_us(uint32_t nus)
{
	uint32_t j = 0;
	uint8_t i = 0;	
	for(j = 0 ;j < nus;j++)
	{
		for(i=0;i<255;i++);
	}
}
uint32_t systick_get()
{
	return uwTick;
}