TIM - 高级定时器

void TIM_Adv_GPIO_Configuration(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;

    /* 开启 GPIOA / GPIOB 时钟 */
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB, ENABLE);

    /* PA8: TIM1_CH1 → 复用推挽输出 */
    GPIO_InitStructure.GPIO_Pin   = GPIO_Pin_8;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_Mode  = GPIO_Mode_AF_PP;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    /* PB13: TIM1_CH1N → 复用推挽输出 */
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13;
    GPIO_Init(GPIOB, &GPIO_InitStructure);

    /* PB12: TIM1_BKIN → 上拉输入（拉高触发刹车） */
    GPIO_InitStructure.GPIO_Pin  = GPIO_Pin_12;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
    GPIO_Init(GPIOB, &GPIO_InitStructure);
}

void TIM_Adv_Configuration(void)
{
    TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
    TIM_OCInitTypeDef       TIM_OCInitStructure;

    /* 开启 TIM1 时钟（TIM1 挂在 APB2 上） */
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);

    /* 时基：PSC=71 → CK_CNT=1MHz；ARR=999 → PWM 周期 1ms (1kHz) */
    TIM_TimeBaseStructure.TIM_Period            = 999;                    // ARR
    TIM_TimeBaseStructure.TIM_Prescaler         = 71;                     // PSC，72MHz/72=1MHz
    TIM_TimeBaseStructure.TIM_ClockDivision     = TIM_CKD_DIV1;
    TIM_TimeBaseStructure.TIM_CounterMode       = TIM_CounterMode_Up;     // 向上计数
    TIM_TimeBaseStructure.TIM_RepetitionCounter = 0;                      // 每次溢出都产生更新事件
    TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);

    /* CH1 互补输出比较：PWM1 模式，占空比 25%（CCR=250） */
    TIM_OCInitStructure.TIM_OCMode      = TIM_OCMode_PWM1;                // CNT<CCR 时输出有效电平
    TIM_OCInitStructure.TIM_OutputState  = TIM_OutputState_Enable;        // 主输出 OCx 使能
    TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;       // 互补输出 OCxN 使能
    TIM_OCInitStructure.TIM_Pulse       = 250;                            // CCR，占空比 = 250/1000 = 25%
    TIM_OCInitStructure.TIM_OCPolarity  = TIM_OCPolarity_High;            // 主输出高电平有效
    TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High;           // 互补输出高电平有效
    TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Reset;          // 空闲时主输出低
    TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCNIdleState_Reset;        // 空闲时互补输出低
    TIM_OC1Init(TIM1, &TIM_OCInitStructure);

    /* 使能 CCR1 预装载，运行期改 CCR 会在下个更新事件生效 */
    TIM_OC1PreloadConfig(TIM1, TIM_OCPreload_Enable);
    TIM_ARRPreloadConfig(TIM1, ENABLE);
}

void TIM_Adv_BDTR_Configuration(void)
{
    TIM_BDTRInitTypeDef TIM_BDTRInitStructure;

    /* 死区时间 DTG=0xFF：在 tDTS=72MHz 下约 1.75us（最大档位） */
    TIM_BDTRInitStructure.TIM_OSSRState       = TIM_OSSRState_Enable;     // 运行模式下空闲时输出由 OCx 决定
    TIM_BDTRInitStructure.TIM_OSSIState       = TIM_OSSIState_Enable;     // 空闲模式下输出由 OISx 决定
    TIM_BDTRInitStructure.TIM_LOCKLevel       = TIM_LOCKLevel_OFF;        // 不锁定，可随时改配置
    TIM_BDTRInitStructure.TIM_DeadTime        = 0xFF;                     // 死区发生器，最大死区
    TIM_BDTRInitStructure.TIM_Break           = TIM_Break_Enable;         // 使能刹车输入
    TIM_BDTRInitStructure.TIM_BreakPolarity   = TIM_BreakPolarity_High;   // BKIN 高电平有效（拉高触发刹车）
    TIM_BDTRInitStructure.TIM_AutomaticOutput = TIM_AutomaticOutput_Enable; // 刹车解除后自动恢复输出
    TIM_BDTRConfig(TIM1, &TIM_BDTRInitStructure);

    /* 使能主输出 MOE（高级定时器必须）+ 启动计数器 */
    TIM_CtrlPWMOutputs(TIM1, ENABLE);
    TIM_Cmd(TIM1, ENABLE);
}

int main(void)
{
    delay_init();
    UART_Configuration(115200);

    printf("\nTIM1 Advanced Complementary PWM Test.\n");
    printf("CH1=PA8, CH1N=PB13, BKIN=PB12\n");

    /* 依次初始化：GPIO → 时基+OC → BDTR+启动 */
    TIM_Adv_GPIO_Configuration();
    TIM_Adv_Configuration();
    TIM_Adv_BDTR_Configuration();

    while (1)
    {
        /* 读取 BDTR.MOE 主输出使能位：1=正常输出，0=刹车触发 */
        if (TIM1->BDTR & TIM_BDTR_MOE)
            printf("PWM Running  (MOE=1)\n");
        else
            printf("Break Active (MOE=0) -- PB12 pulled high!\n");

        delay_ms(500);
    }
}

int SER_PutChar(int ch)
{
    while (!USART_GetFlagStatus(USART_TEST, USART_FLAG_TC));
    USART_SendData(USART_TEST, (uint8_t)ch);
    return ch;
}

int fputc(int c, FILE *f)
{
    if (c == '\n')
        SER_PutChar('\r');         // 补回车，确保串口工具正确换行
    return (SER_PutChar(c));
}