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109 lines
3.0 KiB
C
109 lines
3.0 KiB
C
/*!
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\file systick.c
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\brief the systick configuration file
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\version 2016-01-15, V1.0.0, demo for GD32F1x0
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\version 2016-05-13, V2.0.0, demo for GD32F1x0
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\version 2019-11-20, V3.0.0, demo for GD32F1x0
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*/
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/*
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Copyright (c) 2019, GigaDevice Semiconductor Inc.
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Redistribution and use in source and binary forms, with or without modification,
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are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice, this
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list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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3. Neither the name of the copyright holder nor the names of its contributors
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may be used to endorse or promote products derived from this software without
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specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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OF SUCH DAMAGE.
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*/
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#include "gd32f1x0.h"
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#include "systick.h"
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volatile static uint32_t delay;
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volatile static unsigned long tick_count_ms = 0;
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/*!
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\brief configure systick
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\param[in] none
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\param[out] none
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\retval none
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*/
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void systick_config(void)
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{
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/* setup systick timer for 1000Hz interrupts */
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if (SysTick_Config(SystemCoreClock / 1000)){
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/* capture error */
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while (1){
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}
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}
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/* configure the systick handler priority */
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NVIC_SetPriority(SysTick_IRQn, 0x00);
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}
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/*!
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\brief delay a time in milliseconds
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\param[in] count: count in milliseconds
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\param[out] none
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\retval none
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*/
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void delay_1ms(uint32_t count)
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{
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delay = count;
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while(0 != delay){
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}
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}
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/*!
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\brief delay decrement
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\param[in] none
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\param[out] none
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\retval none
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*/
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void delay_decrement(void)
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{
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if (0 != delay){
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delay--;
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}
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}
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/*!
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\brief tick count increment in ms
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\param[in] none
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\param[out] none
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\retval none
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*/
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void tick_count_increment()
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{
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tick_count_ms++;
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}
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/*!
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\brief get tick count in ms
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\param[in] *count: pointer to count
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\param[out] none
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\retval none
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*/
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void get_tick_count_ms(unsigned long *count)
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{
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*count = tick_count_ms;
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}
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