一、硬件介绍：
萤火工场新发布的GD32VW553-IOT的外观具有十分轻量化的设计，采用的是兆易创新在23年底发布的GD32VW553HMQ7芯片，芯片采用RISC-V内核的32位微处理器。板载PCB天线和IPEX天线座实现了Wifi，蓝牙信号收发；SY8201 DC-DC芯片为板载系统提供稳定的电源；1.27mm间距的排针的BOOT跳线实现了BOOT0和BOOT1电平选择；按键和BOOT0配合使用实现固件更新功能；Flash接口可根据需要扩展合适容量的数据存储器。
二、软件环境：
在兆易创新的资料下载网页上下载GD32 Embedded Builder 作为编写代码的开发环境；GD32 All-In-One Programmer 将编译好的固件下载到开发板上。
三、GD32 Embedded Builder环境
打开GD32 Embedded Builder后在帮助下拉菜单下打开安装新软件添加 https://mirrors.ustc.edu.cn/eclipse/technology/babel/update-site/R0.20.0/2022-12/
（图中所示为华文环境）
四、固件下载：
先完成BOOT硬件跳线配置，再打开GD32 All-In-One Programmer ，PA6,PA7接入USB转换UART-TTL工具，按下复位按键KEY，按下软件上“connect”，当连接完成后完成后续下载操作。
在开发环境下生成的代码：
#include "gd32vw55x.h"
#include "systick.h"
#include <stdio.h>
#include "main.h"
#include "gd32vw553h_eval.h"
/*!
\brief toggle the led every 500ms
\param[in] none
\param[out] none
\retval none
*/
void led_spark(void)
{
static __IO uint32_t timingdelaylocal = 0U;
if(timingdelaylocal) {
if(timingdelaylocal < 500U) {
gd_eval_led_on(LED2);
gd_eval_led_on(LED3);
} else {
gd_eval_led_off(LED2);
gd_eval_led_off(LED3);
}
timingdelaylocal--;
} else {
timingdelaylocal = 1000U;
}
}
/*!
\brief main function
\param[in] none
\param[out] none
\retval none
*/
int main(void)
{
#ifdef __FIRMWARE_VERSION_DEFINE
uint32_t fw_ver = 0;
#endif /* __FIRMWARE_VERSION_DEFINE */
/* configure systick */
systick_config();
eclic_priority_group_set(ECLIC_PRIGROUP_LEVEL3_PRIO1);
/* initilize the LEDs, USART and key */
gd_eval_led_init(LED1);
gd_eval_led_init(LED2);
gd_eval_led_init(LED3);
gd_eval_com_init(EVAL_COM0);
gd_eval_key_init(KEY_TAMPER_WAKEUP, KEY_MODE_GPIO);
#ifdef __FIRMWARE_VERSION_DEFINE
fw_ver = gd32vw55x_firmware_version_get();
/* print firmware version */
printf("\r\nGD32VW55X series firmware version: V%d.%d.%d", (uint8_t)(fw_ver >> 24), (uint8_t)(fw_ver >> 16), (uint8_t)(fw_ver >> 8));
#endif /* __FIRMWARE_VERSION_DEFINE */
/* print out the clock frequency of system, AHB, APB1 and APB2 */
printf("\r\nCK_SYS is %d\r\n", rcu_clock_freq_get(CK_SYS));
printf("\r\nCK_AHB is %d\r\n", rcu_clock_freq_get(CK_AHB));
printf("\r\nCK_APB1 is %d\r\n", rcu_clock_freq_get(CK_APB1));
printf("\r\nCK_APB2 is %d\r\n", rcu_clock_freq_get(CK_APB2));
while(1) {
if(RESET == gd_eval_key_state_get(KEY_TAMPER_WAKEUP)) {
delay_1ms(50);
if(SET == gd_eval_key_state_get(KEY_TAMPER_WAKEUP)) {
gd_eval_led_toggle(LED1);
}
gd_eval_led_toggle(LED2);
delay_1ms(50);
}
}
gd_eval_led_toggle(LED3);
delay_1ms(50);
}
led在gd32vw553_eval定义如下
static uint32_t GPIO_PORT[LEDn] = {LED1_GPIO_PORT, LED2_GPIO_PORT,
LED3_GPIO_PORT};
static uint32_t GPIO_PIN[LEDn] = {LED1_PIN, LED2_PIN, LED3_PIN};
static rcu_periph_enum COM_CLK[COMn] = {EVAL_COM0_CLK};
static uint32_t COM_TX_PIN[COMn] = {EVAL_COM0_TX_PIN};
static uint32_t COM_RX_PIN[COMn] = {EVAL_COM0_RX_PIN};
static rcu_periph_enum GPIO_CLK[LEDn] = {LED1_GPIO_CLK, LED2_GPIO_CLK,
LED3_GPIO_CLK};
static uint32_t KEY_PORT[KEYn] = {TAMPER_WAKEUP_KEY_GPIO_PORT};
static uint32_t KEY_PIN[KEYn] = {TAMPER_WAKEUP_KEY_PIN};
static rcu_periph_enum KEY_CLK[KEYn] = {TAMPER_WAKEUP_KEY_GPIO_CLK};
static exti_line_enum KEY_EXTI_LINE[KEYn] = {TAMPER_WAKEUP_KEY_EXTI_LINE};
static uint8_t KEY_PORT_SOURCE[KEYn] = {TAMPER_WAKEUP_KEY_EXTI_PORT_SOURCE};
static uint8_t KEY_PIN_SOURCE[KEYn] = {TAMPER_WAKEUP_KEY_EXTI_PIN_SOURCE};
static IRQn_Type KEY_IRQn[KEYn] = {TAMPER_WAKEUP_KEY_EXTI_IRQn};
led操作函数如下：
void gd_eval_led_toggle(led_typedef_enum lednum)
{
GPIO_TG(GPIO_PORT[lednum]) = GPIO_PIN[lednum];
}
点亮LED
void gd_eval_led_on(led_typedef_enum lednum)
{
GPIO_BOP(GPIO_PORT[lednum]) = GPIO_PIN[lednum];
}
息灭LED
void gd_eval_led_off(led_typedef_enum lednum)
{
GPIO_BC(GPIO_PORT[lednum]) = GPIO_PIN[lednum];
}
按键初始
void gd_eval_key_init(key_typedef_enum key_num, keymode_typedef_enum key_mode)
{
/* enable the key clock */
rcu_periph_clock_enable(KEY_CLK[key_num]);
rcu_periph_clock_enable(RCU_SYSCFG);
/* configure button pin as input */
gpio_mode_set(KEY_PORT[key_num], GPIO_MODE_INPUT, GPIO_PUPD_NONE, KEY_PIN[key_num]);
if(key_mode == KEY_MODE_EXTI){
/* enable and set key EXTI interrupt to the lowest priority */
eclic_priority_group_set(ECLIC_PRIGROUP_LEVEL3_PRIO1);
eclic_irq_enable(KEY_IRQn[key_num],1, 1);
/* connect key EXTI line to key GPIO pin */
syscfg_exti_line_config(KEY_PORT_SOURCE[key_num], KEY_PIN_SOURCE[key_num]);
/* configure key EXTI line */
exti_init(KEY_EXTI_LINE[key_num], EXTI_INTERRUPT, EXTI_TRIG_FALLING);
exti_interrupt_flag_clear(KEY_EXTI_LINE[key_num]);
}
}
按键获取
uint8_t gd_eval_key_state_get(key_typedef_enum button)
{
return gpio_input_bit_get(KEY_PORT[button], KEY_PIN[button]);
}
串口初始：
void gd_eval_com_init(uint32_t com)
{
/* enable GPIO clock */
uint32_t COM_ID = 0U;
if(EVAL_COM0 == com)
{
COM_ID = 0U;
}
rcu_periph_clock_enable(EVAL_COM0_TX_GPIO_CLK);
rcu_periph_clock_enable(EVAL_COM0_RX_GPIO_CLK);
/* enable USART clock */
rcu_periph_clock_enable(COM_CLK[COM_ID]);
/* connect port to USARTx_Tx */
gpio_af_set(EVAL_COM0_TX_GPIO_PORT, EVAL_COM0_TX_AF, COM_TX_PIN[COM_ID]);
/* connect port to USARTx_Rx */
gpio_af_set(EVAL_COM0_RX_GPIO_PORT, EVAL_COM0_RX_AF, COM_RX_PIN[COM_ID]);
/* configure USART Tx as alternate function push-pull */
gpio_mode_set(EVAL_COM0_TX_GPIO_PORT, GPIO_MODE_AF, GPIO_PUPD_PULLUP, COM_TX_PIN[COM_ID]);
gpio_output_options_set(EVAL_COM0_TX_GPIO_PORT, GPIO_OTYPE_PP, GPIO_OSPEED_25MHZ, COM_TX_PIN[COM_ID]);
/* configure USART Rx as alternate function push-pull */
gpio_mode_set(EVAL_COM0_RX_GPIO_PORT, GPIO_MODE_AF, GPIO_PUPD_PULLUP, COM_RX_PIN[COM_ID]);
gpio_output_options_set(EVAL_COM0_RX_GPIO_PORT, GPIO_OTYPE_PP, GPIO_OSPEED_25MHZ, COM_RX_PIN[COM_ID]);
/* USART configure */
usart_deinit(com);
usart_baudrate_set(com, 115200U);
usart_receive_config(com, USART_RECEIVE_ENABLE);
usart_transmit_config(com, USART_TRANSMIT_ENABLE);
usart_enable(com);
}
