基于stm32f103c8t6的UART驱动代码编写，定时器驱动代码编写，以及按键扫描驱动代码编写

基于STM32F103C8T6的UART驱动代码编写如下：

#include "stm32f10x.h"

#define USART_RX_BUF_SIZE 128

uint8_t USART_RX_BUF\[USART_RX_BUF_SIZE\];
uint8_t USART_RX_CNT = 0;

void USART1_IRQHandler(void)
{
    if (USART_GetITStatus(USART1, USART_IT_RXNE) != RESET) //接收中断
    {
        uint8_t r = USART_ReceiveData(USART1); //读取接收到的数据
        if (USART_RX_CNT < USART_RX_BUF_SIZE)
        {
            USART_RX_BUF\[USART_RX_CNT\] = r;
            USART_RX_CNT++;
        }
        USART_ClearITPendingBit(USART1, USART_IT_RXNE);
    }
    if (USART_GetITStatus(USART1, USART_IT_IDLE) != RESET) //接收完成后进入空闲中断
    {
        USART1->SR; //先读SR，再读DR才能完成idle中断的清零，否则会一直进入中断
        USART1->DR;
        if (USART_RX_CNT < USART_RX_BUF_SIZE)
        {
            // 接收完成标志位
        }
        else
        {
            // 升级程序标志
        }
        USART_RX_CNT = 0;
    }
}

定时器驱动代码编写如下：

#include "stm32f10x.h"

void TIM6_Configuration(void)
{
    TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
    NVIC_InitTypeDef NVIC_InitStructure;

    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM6, ENABLE);

    TIM_TimeBaseStructure.TIM_Period = 1000 - 1; //定时器溢出时间为1ms
    TIM_TimeBaseStructure.TIM_Prescaler = 72 - 1; //定时器时钟频率为72MHz
    TIM_TimeBaseStructure.TIM_ClockDivision = 0;
    TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
    TIM_TimeBaseInit(TIM6, &TIM_TimeBaseStructure);

    TIM_ITConfig(TIM6, TIM_IT_Update, ENABLE);

    NVIC_InitStructure.NVIC_IRQChannel = TIM6_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);

    TIM_Cmd(TIM6, ENABLE);
}

void TIM6_IRQHandler(void)
{
    if (TIM_GetITStatus(TIM6, TIM_IT_Update) != RESET)
    {
        // 定时器中断处理代码
        TIM_ClearITPendingBit(TIM6, TIM_IT_Update);
    }
}

按键扫描驱动代码编写如下：

#include "stm32f10x.h"

#define KEY_GPIO_PORT GPIOA
#define KEY_GPIO_PIN GPIO_Pin_0

void Key_Init(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);

    GPIO_InitStructure.GPIO_Pin = KEY_GPIO_PIN;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(KEY_GPIO_PORT, &GPIO_InitStructure);
}

uint8_t Key_Scan(void)
{
    if (GPIO_ReadInputDataBit(KEY_GPIO_PORT, KEY_GPIO_PIN) == RESET)
    {
        // 按键按下
        return 1;
    }
    else
    {
        // 按键未按下
        return 0;
    }
}

以上是基于STM32F103C8T6的UART驱动代码、定时器驱动代码和按键扫描驱动代码的编写。请根据实际需求进行适当的修改和调整。
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