基于软件stm32cubemx和板子stm32F103C8T6,编写符合以下要求的主函数代码:配置8兆的晶振,72Mhz的APB1时钟频率,利用定时器中断实现0.5s闪led灯一次,5s过后led灯一直亮着,10s后led灯熄灭。任意期间按一次按键,就要从头开始闪烁的任务。
时间: 2024-09-27 19:07:41 浏览: 47
首先,我们需要明确的是STM32CubeMX是一款图形化配置工具,并非直接生成代码,但它能帮助我们设置STM32的寄存器值。不过,基于您的需求,我可以提供一段示例C代码,说明如何通过代码来实现您描述的功能。假设已有一个按键中断初始化好的结构(如KeypadInterrupt),以下是一个基础的示例,包括配置时钟、定时器和LED闪烁及按键处理:
```c
#include "stm32f1xx_hal.h"
#include "stm32f10x_tim.h"
#include "stm32f10x_gpio.h"
#define LED_PIN GPIO_Pin_12
#define KEY_PIN GPIO_Pin_0
#define LED_GPIO_PORT GPIOA
#define KEY_GPIO_PORT GPIOB
// 定义定时器参数
TIM_HandleTypeDef htim1;
const uint32_t APB1Prescaler = (HAL_RCC_GetPCLK1Freq() / 72000000U - 1);
const uint32_t TimerPeriod = (8000000 * 2) - 1; // 8MHz晶振,周期约为0.5s
void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct;
RCC_ClkInitTypeDef RCC_ClkInitStruct;
__HAL_RCC_PWR_CLK_ENABLE();
__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
RCC_OscInitStruct.HSEState = RCC_HSE_ON;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9;
if HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
Error_Handler();
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
|RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_APB1_DIV4;
RCC_ClkInitStruct.APB2CLKDivider = RCC_APB2_DIV2;
if HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5) != HAL_OK)
Error_Handler();
__HAL_RCC_GPIOA_CLK_ENABLE();
__HAL_RCC_GPIOB_CLK_ENABLE();
}
void Tim1_IRQHandler(void)
{
TIM_ClearITPendingBit(htim1.Instance, TIM_IT_Update);
HAL_GPIO_TogglePin(LED_GPIO_PORT, LED_PIN);
}
int main(void)
{
HAL_Init();
SystemClock_Config();
TIM_TimeBaseInitTypeDef.TIM basal_freq;
basal_freq.Prescaler = APB1Prescaler;
basal_freq.CounterMode = TIM_COUNTERMODE_UP;
basal_freq.Period = TimerPeriod;
basal_freq.ClockDivision = TIM_CLOCKDIVISION_DIV1;
htim1.Instance = TIM1;
htim1.Init = basal_freq;
if (HAL_TIM_Base_Init(&htim1) != HAL_OK)
Error_Handler();
__TIM1_UP_IRQn_ENABLE();
GPIO_InitTypeDef GPIO_InitStruct;
GPIO_InitStruct.Pin = LED_PIN;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
HAL_GPIO_Init(LED_GPIO_PORT, &GPIO_InitStruct);
GPIO_InitStruct.Pin = KEY_PIN;
GPIO_InitStruct.Mode = GPIO_MODE_IT_FALLING;
GPIO_InitStruct.Pull = GPIO_PULLUP;
HAL_GPIO_Init(KEY_GPIO_PORT, &GPIO_InitStruct);
while (1)
{
// 检查按键是否按下
if (__HAL_GPIO_EXTI_GET_IT(KEY_GPIO_PORT, KEY_PIN))
{
// 按键按下,清零定时器并重新开始闪烁
TIM_Cmd(&htim1, ENABLE);
HAL_GPIO_EXTI_IRQHandler(KEY_GPIO_PORT);
HAL_Delay(500);
TIM_Cmd(&htim1, DISABLE);
}
if (HAL_TIM_Base_GetOverrun(&htim1) == TIM_FLAG_UPDATE)
{
TIM_Cmd(&htim1, DISABLE);
HAL_GPIO_TogglePin(LED_GPIO_PORT, LED_PIN);
HAL_Delay(5000);
TIM_Cmd(&htim1, ENABLE);
}
// 如果已经过去了10秒
if (HAL_TIM_Base_GetTime(&htim1) >= 10000UL)
{
HAL_GPIO_WritePin(LED_GPIO_PORT, LED_PIN, GPIO_PIN_SET);
HAL_Delay(5000);
HAL_GPIO_WritePin(LED_GPIO_PORT, LED_PIN, GPIO_PIN_RESET);
}
}
}
// 错误处理函数
void Error_Handler(void)
{
while (1)
{
}
}
```
注意:此代码仅为示例,实际应用中可能需要根据具体的STM32库文件和硬件配置进行调整。同时,对于按键中断部分,你需要确保你的按键连接到正确的中断引脚,并且该中断已经被正确地连接到`__TIM1_UP_IRQn`上。
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