BUTTONx_GPIO_CLK_ENABLE
时间: 2024-06-17 21:07:04 浏览: 13
BUTTONx_GPIO_CLK_ENABLE是一个宏定义,用于使能BUTTONx对应的GPIO端口时钟。这个宏定义通常在STM32的HAL库中使用,其中x表示具体的按钮编号。通过使能GPIO端口时钟,可以让对应的GPIO引脚可以正常工作,实现对按钮的读取操作。需要注意的是,使用BUTTONx_GPIO_CLK_ENABLE之前,需要先调用RCC_PeriphCLKInit()函数进行时钟初始化。
相关问题
请基于stm32f4写一个小游戏
好的,我可以给您提供一个简单的游戏示例:跑酷游戏。
首先,您需要准备以下硬件和软件:
硬件:
- STM32F4开发板
- OLED屏幕
- 两个按钮
软件:
- Keil MDK-ARM开发环境
- STM32F4的HAL库和OLED驱动库
接下来,按照以下步骤进行操作:
1. 初始化OLED屏幕和两个按钮的GPIO引脚。
2. 定义游戏中的角色和障碍物,以及它们的坐标和速度。
3. 在循环中不断更新角色和障碍物的坐标,并检测是否发生碰撞。
4. 将角色和障碍物的图像绘制到OLED屏幕上。
5. 使用两个按钮控制角色的跳跃。
下面是示例代码:
```
#include "stm32f4xx_hal.h"
#include "ssd1306.h"
#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
GPIO_TypeDef* BUTTON1_GPIO_PORT = GPIOA;
const uint16_t BUTTON1_GPIO_PIN = GPIO_PIN_0;
GPIO_TypeDef* BUTTON2_GPIO_PORT = GPIOA;
const uint16_t BUTTON2_GPIO_PIN = GPIO_PIN_1;
typedef struct {
int x, y;
int speed;
} Obstacle;
typedef struct {
int x, y;
int vy;
} Player;
Obstacle obstacle;
Player player;
void init() {
ssd1306_Init();
GPIO_InitTypeDef GPIO_InitStruct;
__HAL_RCC_GPIOA_CLK_ENABLE();
GPIO_InitStruct.Pin = BUTTON1_GPIO_PIN;
GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
HAL_GPIO_Init(BUTTON1_GPIO_PORT, &GPIO_InitStruct);
GPIO_InitStruct.Pin = BUTTON2_GPIO_PIN;
HAL_GPIO_Init(BUTTON2_GPIO_PORT, &GPIO_InitStruct);
obstacle.x = SCREEN_WIDTH;
obstacle.y = SCREEN_HEIGHT - 10;
obstacle.speed = 5;
player.x = 10;
player.y = SCREEN_HEIGHT - 10;
player.vy = 0;
}
void update() {
// Update obstacle position
obstacle.x -= obstacle.speed;
// Check collision
if (player.x + 10 > obstacle.x && player.x < obstacle.x + 10 &&
player.y + 10 > obstacle.y && player.y < obstacle.y + 10) {
// Game over
while (1) {
ssd1306_Fill(Black);
ssd1306_SetCursor(10, 20);
ssd1306_WriteString("Game Over", Font_11x18, White);
ssd1306_UpdateScreen();
}
}
// Update player position
player.y += player.vy;
if (player.y < 0) {
player.y = 0;
} else if (player.y > SCREEN_HEIGHT - 10) {
player.y = SCREEN_HEIGHT - 10;
}
// Jump
if (!HAL_GPIO_ReadPin(BUTTON1_GPIO_PORT, BUTTON1_GPIO_PIN)) {
player.vy = -10;
}
// Draw
ssd1306_Fill(Black);
ssd1306_DrawBitmap(obstacle.x, obstacle.y, obstacle_image, 10, 10, White);
ssd1306_DrawBitmap(player.x, player.y, player_image, 10, 10, White);
ssd1306_UpdateScreen();
}
int main(void) {
HAL_Init();
init();
while (1) {
update();
}
}
```
请注意,上述代码只是一个简单的示例,您可以根据自己的需要进行修改和优化。
stm32f103按键控制电机转速实验内容
实验目的:使用STM32F103单片机控制直流电机转速,并通过按键控制电机的转速。
实验器材:STM32F103C8T6开发板、直流电源、直流电机、按键开关、杜邦线等。
实验原理:通过PWM输出控制电机的转速,按键控制占空比的变化,从而改变电机的转速。
实验步骤:
1. 将STM32F103C8T6开发板与直流电机连接,电源接入开发板的5V和GND端口,电机的正极接入开发板的PA6口,电机的负极接入开发板的GND端口。
2. 将按键连接到开发板的PC13口,其中一个端口接入PC13口,另一个端口接入GND端口。
3. 配置开发板的PWM输出,将PA6口配置为TIM3_CH1输出,使用TIM3作为PWM输出的定时器。具体配置方法可以参考STM32的官方文档和开发板的手册。
4. 配置开发板的中断服务函数,当按键按下时,改变PWM的占空比,从而改变电机的转速。具体代码实现可以参考下面的示例代码。
5. 编写主函数,初始化开发板的各个模块,并进入循环中等待按键的触发。
示例代码:
```
#include "stm32f10x.h"
#include "stm32f10x_gpio.h"
#include "stm32f10x_rcc.h"
#include "stm32f10x_tim.h"
#define MOTOR_PWM_TIM TIM3
#define MOTOR_PWM_PIN GPIO_Pin_6
#define MOTOR_PWM_GPIO GPIOA
#define MOTOR_PWM_TIM_CLK RCC_APB1Periph_TIM3
#define MOTOR_PWM_GPIO_CLK RCC_APB2Periph_GPIOA
#define BUTTON_GPIO GPIOC
#define BUTTON_PIN GPIO_Pin_13
#define BUTTON_GPIO_CLK RCC_APB2Periph_GPIOC
void TIM_Configuration(void)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
/* TIM3 clock enable */
RCC_APB1PeriphClockCmd(MOTOR_PWM_TIM_CLK, ENABLE);
/* GPIOA clock enable */
RCC_APB2PeriphClockCmd(MOTOR_PWM_GPIO_CLK, ENABLE);
/* GPIOA Configuration: PA6 as alternate function push-pull */
GPIO_InitStructure.GPIO_Pin = MOTOR_PWM_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(MOTOR_PWM_GPIO, &GPIO_InitStructure);
/* Time base configuration */
TIM_TimeBaseStructure.TIM_Period = 999;
TIM_TimeBaseStructure.TIM_Prescaler = 719;
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(MOTOR_PWM_TIM, &TIM_TimeBaseStructure);
/* PWM1 Mode configuration: Channel1 */
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse = 0;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OC1Init(MOTOR_PWM_TIM, &TIM_OCInitStructure);
TIM_OC1PreloadConfig(MOTOR_PWM_TIM, TIM_OCPreload_Enable);
/* TIM3 enable counter */
TIM_Cmd(MOTOR_PWM_TIM, ENABLE);
}
void EXTI_Configuration(void)
{
EXTI_InitTypeDef EXTI_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
/* GPIOC clock enable */
RCC_APB2PeriphClockCmd(BUTTON_GPIO_CLK, ENABLE);
/* Configure Button pin as input floating */
GPIO_InitStructure.GPIO_Pin = BUTTON_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
GPIO_Init(BUTTON_GPIO, &GPIO_InitStructure);
/* Connect Button EXTI Line to Button GPIO Pin */
GPIO_EXTILineConfig(GPIO_PortSourceGPIOC, GPIO_PinSource13);
/* Configure Button EXTI line */
EXTI_InitStructure.EXTI_Line = EXTI_Line13;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
/* Enable and set Button EXTI Interrupt to the lowest priority */
NVIC_InitStructure.NVIC_IRQChannel = EXTI15_10_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x0F;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x0F;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
int main(void)
{
TIM_Configuration();
EXTI_Configuration();
while (1)
{
/* Do nothing */
}
}
void EXTI15_10_IRQHandler(void)
{
if (EXTI_GetITStatus(EXTI_Line13) != RESET)
{
static uint16_t pwm_value = 0;
static uint8_t increase_pwm = 1;
if (increase_pwm)
{
pwm_value += 100;
if (pwm_value >= 1000)
{
increase_pwm = 0;
}
}
else
{
pwm_value -= 100;
if (pwm_value <= 0)
{
increase_pwm = 1;
}
}
TIM_SetCompare1(MOTOR_PWM_TIM, pwm_value);
EXTI_ClearITPendingBit(EXTI_Line13);
}
}
```
实验注意事项:
1. 实验中要注意电机的正负极的接线,保证电机能够正常工作。
2. 在按键的中断服务函数中,要注意占空比的变化范围,避免电机转速变化过快或过慢。
3. 在编写代码时,要注意各个模块的初始化顺序和参数设置,保证程序能够正常运行。
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