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hulk
2024-12-03 15:33:54 +08:00
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119
src/gd32e23x_it.c Normal file
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/*!
\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)
{
}
void TIMER13_IRQHandler(void)
{
if (timer_interrupt_flag_get(TIMER13, TIMER_INT_FLAG_UP) == SET)
{
timer_interrupt_flag_clear(TIMER13, TIMER_INT_FLAG_UP);
static uint8_t led_status = 0;
if (led_status)
{
//! turn on led & reconfig timer13 period to 19000(1900ms)
gpio_bit_write(GPIOB, GPIO_PIN_1, RESET);
timer_autoreload_value_config(TIMER13, 19200);
} else {
//! turn off led & reconfig timer13 period to 1000(100ms)
gpio_bit_write(GPIOB, GPIO_PIN_1, SET);
timer_autoreload_value_config(TIMER13, 800);
}
led_status = !led_status;
}
}

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/*!
\file main.c
\brief led spark with systick, USART print and key example
\version 2024-02-22, V2.1.0, firmware for GD32E23x
*/
#include "main.h"
#include <stdio.h>
#include "gd32e23x.h"
#include "systick.h"
#include "gd32e23x_libopt.h"
#include "peripheral.h"
/*!
\brief main function
\param[in] none
\param[out] none
\retval none
*/
int main(void)
{
/* configure systick */
systick_config();
usart_config();
led_blink_config();
delay_ms(5000);
printf("system start!\r\n");
while(1){
printf("hello world!\r\n");
delay_ms(5000);
}
}
/* retarget the C library printf function to the USART */
int _write (int fd, char *pBuffer, int size)
{
for (int i = 0; i < size; i++)
{
usart_data_transmit(USART0, (uint8_t)pBuffer[i]);
while(RESET == usart_flag_get(USART0, USART_FLAG_TBE));
}
return size;
}

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src/peripheral.c Normal file
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//
// Created by yelv1 on 24-9-22.
//
#include "peripheral.h"
#include "gd32e23x.h"
void usart_config(void)
{
rcu_periph_clock_enable(RCU_GPIOA);
rcu_periph_clock_enable(RCU_USART0);
gpio_af_set(GPIOA, GPIO_AF_1, GPIO_PIN_3);
gpio_af_set(GPIOA, GPIO_AF_1, GPIO_PIN_2);
gpio_mode_set(GPIOA, GPIO_MODE_AF, GPIO_PUPD_PULLUP, GPIO_PIN_3);
gpio_output_options_set(GPIOA, GPIO_OTYPE_PP, GPIO_OSPEED_10MHZ, GPIO_PIN_3);
gpio_mode_set(GPIOA, GPIO_MODE_AF, GPIO_PUPD_PULLUP, GPIO_PIN_2);
gpio_output_options_set(GPIOA, GPIO_OTYPE_PP, GPIO_OSPEED_10MHZ, GPIO_PIN_2);
usart_deinit(USART0);
usart_baudrate_set(USART0, 115200U);
usart_receive_config(USART0, USART_RECEIVE_ENABLE);
usart_transmit_config(USART0, USART_TRANSMIT_ENABLE);
usart_enable(USART0);
gpio_mode_set(GPIOA, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, GPIO_PIN_4);
gpio_output_options_set(GPIOA, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_4);
gpio_bit_write(GPIOA, GPIO_PIN_4, SET);
}
/*!
\brief led blink configuration
\param[in] none
\param[out] none
\retval none
*/
void led_blink_config(void)
{
rcu_periph_clock_enable(RCU_GPIOB);
gpio_mode_set(GPIOB, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, GPIO_PIN_1);
gpio_output_options_set(GPIOB, GPIO_OTYPE_OD, GPIO_OSPEED_50MHZ, GPIO_PIN_1);
gpio_bit_write(GPIOB, GPIO_PIN_1, SET);
rcu_periph_clock_enable(RCU_TIMER13);
timer_deinit(RCU_TIMER13);
timer_parameter_struct timer_initpara;
timer_struct_para_init(&timer_initpara);
timer_initpara.prescaler =7199;
timer_initpara.alignedmode =TIMER_COUNTER_EDGE;
timer_initpara.counterdirection =TIMER_COUNTER_UP;
timer_initpara.period =999;
timer_initpara.clockdivision =TIMER_CKDIV_DIV1;
timer_init(TIMER13, &timer_initpara);
timer_auto_reload_shadow_enable(TIMER13);
timer_interrupt_enable(TIMER13, TIMER_INT_UP);
nvic_irq_enable(TIMER13_IRQn, 0);
timer_enable(TIMER13);
}

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/**
* ************************************************************************
*
* @file systick.c
* @author GD32
* @brief 通过 SysTick 定时器进行微秒级别和毫秒级别的延时函数
*
* ************************************************************************
* @copyright Copyright (c) 2024 GD32
* ************************************************************************
*/
#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;
}