84 lines
2.5 KiB
C
84 lines
2.5 KiB
C
/*!
|
|
\file systick.c
|
|
\brief the systick configuration file
|
|
|
|
\version 2022-03-08, V2.0.0, demo for GD32F4xx
|
|
*/
|
|
|
|
/*
|
|
Copyright (c) 2022, GigaDevice Semiconductor Inc.
|
|
|
|
Redistribution and use in source and binary forms, with or without modification,
|
|
are permitted provided that the following conditions are met:
|
|
|
|
1. Redistributions of source code must retain the above copyright notice, this
|
|
list of conditions and the following disclaimer.
|
|
2. Redistributions in binary form must reproduce the above copyright notice,
|
|
this list of conditions and the following disclaimer in the documentation
|
|
and/or other materials provided with the distribution.
|
|
3. Neither the name of the copyright holder nor the names of its contributors
|
|
may be used to endorse or promote products derived from this software without
|
|
specific prior written permission.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
|
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
|
|
INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
|
|
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
|
|
WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
|
|
OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#include "gd32f4xx.h"
|
|
#include "systick.h"
|
|
|
|
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, 0x00U);
|
|
}
|
|
|
|
/*!
|
|
\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--;
|
|
}
|
|
}
|