[GD32E23x]GD32E230F4实现delay_ms和delay_us

博主： HulkW
发布时间：2024 年 07 月 18 日
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9850字数
分类： MCU学习

GD32E230F4实现delay_ms和delay_us

GD32E230在官方的库种 GD32E23x_Firmware_Library_Vx.x.x 关于delay的功能不那么好用，并且只有 delay_1ms 函数，并没有us延时，但是很多时候仅仅需要一点点延时1ms又太长。经过查询在网上一篇文章种提到了如何定义us延时。

修改文件

修改中断文件

打开 gd32e23x_it.c 文件，拉到最后面，然后删掉Systick_Handler函数里面的调用。
修改结果如下：

/*!
    \file    gd32e23x_it.c
    \brief   interrupt service routines

    \version 2024-02-22, V2.1.0, firmware for GD32E23x
*/

/*
    Copyright (c) 2024, 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 "gd32e23x_it.h"
#include "main.h"
#include "systick.h"

/*!
    \brief      this function handles NMI exception
    \param[in]  none
    \param[out] none
    \retval     none
*/
void NMI_Handler(void)
{
    /* if NMI exception occurs, go to infinite loop */
    while(1) {
    }
}

/*!
    \brief      this function handles HardFault exception
    \param[in]  none
    \param[out] none
    \retval     none
*/
void HardFault_Handler(void)
{
    /* if Hard Fault exception occurs, go to infinite loop */
    while(1) {
    }
}

/*!
    \brief      this function handles SVC exception
    \param[in]  none
    \param[out] none
    \retval     none
*/
void SVC_Handler(void)
{
    /* if SVC exception occurs, go to infinite loop */
    while(1) {
    }
}

/*!
    \brief      this function handles PendSV exception
    \param[in]  none
    \param[out] none
    \retval     none
*/
void PendSV_Handler(void)
{
    /* if PendSV exception occurs, go to infinite loop */
    while(1) {
    }
}

/*!
    \brief      this function handles SysTick exception
    \param[in]  none
    \param[out] none
    \retval     none
*/
void SysTick_Handler(void)
{
}

修改systick文件

这里分两个文件，分别是 systick.c 和 systick.h

这两个文件几乎重写，所以直接看修改示例：

systick.h 内容

/*!
    \file    systick.h
    \brief   the header file of systick
  
    \version 2024-02-22, V2.1.0, firmware for GD32E23x
*/

/*
    Copyright (c) 2024, 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.
*/

#ifndef SYS_TICK_H
#define SYS_TICK_H

#include <stdint.h>

/* function declarations */
/* configure systick */
void systick_config(void);

/* delay a time in milliseconds */
void delay_ms(uint32_t count);

/* delay a time in microseconds */
void delay_us(uint32_t count);

#endif /* SYS_TICK_H */

systick.c 内容

/*!
    \file    systick.c
    \brief   the systick configuration file
  
    \version 2024-02-22, V2.1.0, firmware for GD32E23x
*/

/*
    Copyright (c) 2024, 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 "gd32e23x.h"
#include "systick.h"

volatile static float count_1us = 0;
volatile static float count_1ms = 0;

/**
 * ************************************************************************
 * @brief 配置 SysTick 定时器
 *
 *
 * ************************************************************************
 */
void systick_config(void)
{
    //设置了 SysTick 定时器的时钟源为 HCLK/8
    systick_clksource_set(SYSTICK_CLKSOURCE_HCLK_DIV8);
    //计算了每微秒所需的 SysTick 计数值
    count_1us = (float)SystemCoreClock/8000000;
    //计算了每毫秒所需的 SysTick 计数值
    count_1ms = (float)count_1us * 1000;
}


/**
 * ************************************************************************
 * @brief delay_us  微秒延时函数
 *
 * @param[in] count  微秒值
 *
 * ************************************************************************
 */
void delay_us(uint32_t count)
{
    uint32_t ctl;

    //设置 SysTick 计数器的装载值
    SysTick->LOAD = (uint32_t)(count * count_1us);
    //清零 SysTick 计数器，以确保计数器从零开始计数
    SysTick->VAL = 0x0000U;
    //使能 SysTick 定时器，开始进行计数
    SysTick->CTRL = SysTick_CTRL_ENABLE_Msk;
    //等待 SysTick 计数器的计数值达到装载值时退出
    do
    {
        ctl = SysTick->CTRL;    //读取 CTRL 寄存器的值
    }while((ctl & SysTick_CTRL_ENABLE_Msk)&&!(ctl & SysTick_CTRL_COUNTFLAG_Msk));
    //循环退出，禁用 SysTick 定时器
    SysTick->CTRL &= ~SysTick_CTRL_ENABLE_Msk;
    //将 SysTick 计数器的当前值清零，以便下次使用
    SysTick->VAL = 0x0000U;

}


/**
 * ************************************************************************
 * @brief delay_ms 毫秒延时函数
 *
 * @param[in] count  毫秒值
 *
 * ************************************************************************
 */
void delay_ms(uint32_t count)
{
    uint32_t ctl;

    //设置 SysTick 计数器的装载值
    SysTick->LOAD = (uint32_t)(count * count_1ms);
    //清零 SysTick 计数器，以确保计数器从零开始计数
    SysTick->VAL = 0x0000U;
    //使能 SysTick 定时器，开始进行计数
    SysTick->CTRL = SysTick_CTRL_ENABLE_Msk;
    //等待 SysTick 计数器的计数值达到装载值时退出
    do
    {
        ctl = SysTick->CTRL;    //读取 CTRL 寄存器的值
    }while((ctl&SysTick_CTRL_ENABLE_Msk)&&!(ctl & SysTick_CTRL_COUNTFLAG_Msk));
    //循环退出，禁用 SysTick 定时器
    SysTick->CTRL &= ~SysTick_CTRL_ENABLE_Msk;
    //将 SysTick 计数器的当前值清零，以便下次使用
    SysTick->VAL = 0x0000U;
}

函数调用

#include "gd32e23x.h"
#include "systick.h"
#include <stdio.h>
#include "main.h"


/**
 * ************************************************************************
 * @brief 主函数main
 *
 *
 * @return
 * ************************************************************************
 */
int main(void)
{
    uint8_t num1;
    delay_ms(num1);

    uint8_t num2;
    delay_us(num2);

    while(1)
    {

    }
}

附录

【GD32】---- 移植工程模板及点灯测试

最后修改：2024 年 09 月 02 日

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November 18th, 2024 at 12:32 am

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[GD32E23x]GD32E230F4实现delay_ms和delay_us

HulkW • 2024 年 07 月 18 日

<h1>GD32E230F4实现delay_ms和delay_us</h1><p>GD32E230在官方的库种 <code>GD32E23x_Firmware_Library_Vx.x.x</code> 关于delay的功能不那么好用，并且只有 <code>delay_1ms</code> 函数，并没有us延时，但是很多时候仅仅需要一点点延时1ms又太长。经过查询在网上一篇文章种提到了如何定义us延时。</p><h2>修改文件</h2><h3>修改中断文件</h3><p>打开 <code>gd32e23x_it.c</code> 文件，拉到最后面，然后删掉Systick_Handler函数里面的调用。<br>修改结果如下：</p><pre><code class="lang-c">/*!
    \file    gd32e23x_it.c
    \brief   interrupt service routines

\version 2024-02-22, V2.1.0, firmware for GD32E23x
*/

/*
    Copyright (c) 2024, 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 &quot;AS IS&quot;
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 &quot;gd32e23x_it.h&quot;
#include &quot;main.h&quot;
#include &quot;systick.h&quot;

/*!
    \brief      this function handles NMI exception
    \param[in]  none
    \param[out] none
    \retval     none
*/
void NMI_Handler(void)
{
    /* if NMI exception occurs, go to infinite loop */
    while(1) {
    }
}

/*!
    \brief      this function handles HardFault exception
    \param[in]  none
    \param[out] none
    \retval     none
*/
void HardFault_Handler(void)
{
    /* if Hard Fault exception occurs, go to infinite loop */
    while(1) {
    }
}

/*!
    \brief      this function handles SVC exception
    \param[in]  none
    \param[out] none
    \retval     none
*/
void SVC_Handler(void)
{
    /* if SVC exception occurs, go to infinite loop */
    while(1) {
    }
}

/*!
    \brief      this function handles PendSV exception
    \param[in]  none
    \param[out] none
    \retval     none
*/
void PendSV_Handler(void)
{
    /* if PendSV exception occurs, go to infinite loop */
    while(1) {
    }
}

/*!
    \brief      this function handles SysTick exception
    \param[in]  none
    \param[out] none
    \retval     none
*/
void SysTick_Handler(void)
{
}</code></pre><h3>修改systick文件</h3><p>这里分两个文件，分别是 <code>systick.c</code> 和 <code>systick.h</code></p><p>这两个文件几乎重写，所以直接看修改示例：</p><p><code>systick.h</code> 内容</p><pre><code class="lang-c">/*!
    \file    systick.h
    \brief   the header file of systick
  
    \version 2024-02-22, V2.1.0, firmware for GD32E23x
*/

/*
    Copyright (c) 2024, 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 &quot;AS IS&quot; 
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.
*/

#ifndef SYS_TICK_H
#define SYS_TICK_H

#include &lt;stdint.h&gt;

/* function declarations */
/* configure systick */
void systick_config(void);

/* delay a time in milliseconds */
void delay_ms(uint32_t count);

/* delay a time in microseconds */
void delay_us(uint32_t count);

#endif /* SYS_TICK_H */</code></pre><p><code>systick.c</code> 内容</p><pre><code class="lang-c">/*!
    \file    systick.c
    \brief   the systick configuration file
  
    \version 2024-02-22, V2.1.0, firmware for GD32E23x
*/

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 &quot;AS IS&quot; 
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 &quot;gd32e23x.h&quot;
#include &quot;systick.h&quot;

volatile static float count_1us = 0;
volatile static float count_1ms = 0;

/**
 * ************************************************************************
 * @brief 配置 SysTick 定时器
 *
 *
 * ************************************************************************
 */
void systick_config(void)
{
    //设置了 SysTick 定时器的时钟源为 HCLK/8
    systick_clksource_set(SYSTICK_CLKSOURCE_HCLK_DIV8);
    //计算了每微秒所需的 SysTick 计数值
    count_1us = (float)SystemCoreClock/8000000;
    //计算了每毫秒所需的 SysTick 计数值
    count_1ms = (float)count_1us * 1000;
}

/**
 * ************************************************************************
 * @brief delay_us  微秒延时函数
 *
 * @param[in] count  微秒值
 *
 * ************************************************************************
 */
void delay_us(uint32_t count)
{
    uint32_t ctl;

//设置 SysTick 计数器的装载值
    SysTick-&gt;LOAD = (uint32_t)(count * count_1us);
    //清零 SysTick 计数器，以确保计数器从零开始计数
    SysTick-&gt;VAL = 0x0000U;
    //使能 SysTick 定时器，开始进行计数
    SysTick-&gt;CTRL = SysTick_CTRL_ENABLE_Msk;
    //等待 SysTick 计数器的计数值达到装载值时退出
    do
    {
        ctl = SysTick-&gt;CTRL;    //读取 CTRL 寄存器的值
    }while((ctl &amp; SysTick_CTRL_ENABLE_Msk)&amp;&amp;!(ctl &amp; SysTick_CTRL_COUNTFLAG_Msk));
    //循环退出，禁用 SysTick 定时器
    SysTick-&gt;CTRL &amp;= ~SysTick_CTRL_ENABLE_Msk;
    //将 SysTick 计数器的当前值清零，以便下次使用
    SysTick-&gt;VAL = 0x0000U;

}

/**
 * ************************************************************************
 * @brief delay_ms 毫秒延时函数
 *
 * @param[in] count  毫秒值
 *
 * ************************************************************************
 */
void delay_ms(uint32_t count)
{
    uint32_t ctl;

//设置 SysTick 计数器的装载值
    SysTick-&gt;LOAD = (uint32_t)(count * count_1ms);
    //清零 SysTick 计数器，以确保计数器从零开始计数
    SysTick-&gt;VAL = 0x0000U;
    //使能 SysTick 定时器，开始进行计数
    SysTick-&gt;CTRL = SysTick_CTRL_ENABLE_Msk;
    //等待 SysTick 计数器的计数值达到装载值时退出
    do
    {
        ctl = SysTick-&gt;CTRL;    //读取 CTRL 寄存器的值
    }while((ctl&amp;SysTick_CTRL_ENABLE_Msk)&amp;&amp;!(ctl &amp; SysTick_CTRL_COUNTFLAG_Msk));
    //循环退出，禁用 SysTick 定时器
    SysTick-&gt;CTRL &amp;= ~SysTick_CTRL_ENABLE_Msk;
    //将 SysTick 计数器的当前值清零，以便下次使用
    SysTick-&gt;VAL = 0x0000U;
}</code></pre><h2>函数调用</h2><pre><code class="lang-c">#include &quot;gd32e23x.h&quot;
#include &quot;systick.h&quot;
#include &lt;stdio.h&gt;
#include &quot;main.h&quot;

/**
 * ************************************************************************
 * @brief 主函数main
 *
 *
 * @return
 * ************************************************************************
 */
int main(void)
{
    uint8_t num1;
    delay_ms(num1);

uint8_t num2;
    delay_us(num2);

while(1)
    {

}
}</code></pre><h1>附录</h1><p><span class="external-link"><a class="no-external-link" href="https://www.cnblogs.com/zxr-blog/p/18175017" target="_blank"><i data-feather="external-link"></i>【GD32】---- 移植工程模板及点灯测试</a></span></p>

[GD32E23x]GD32E230F4实现delay_ms和delay_us

GD32E230F4实现delay_ms和delay_us

修改文件

修改中断文件

修改systick文件

函数调用

附录

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[GD32E23x]GD32E230F4实现delay_ms和delay_us

GD32E230F4实现delay_ms和delay_us

修改文件

修改中断文件

修改systick文件

函数调用

附录

3 条评论

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[GD32E23x]GD32E230F4实现delay_ms和delay_us

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