帮我写一个使用STM32f103zet6库函数 DMA 高级定时器 采集占空比的程序精度为1%

当然可以帮你编写一个使用STM32F103ZET6库函数和DMA高级定时器的程序，用于采集占空比，并保持精度在1%内。以下是一个示例程序：

#include "stm32f10x.h"

// 定义计数器的周期
#define TIMER_PERIOD 65535

void TIM3_PWM_Input_Init(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;
    TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
    TIM_ICInitTypeDef TIM_ICInitStructure;
    DMA_InitTypeDef DMA_InitStructure;

    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
    RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);

    // 配置GPIO引脚
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    // 配置TIM3计数器
    TIM_TimeBaseStructure.TIM_Period = TIMER_PERIOD;
    TIM_TimeBaseStructure.TIM_Prescaler = 0;
    TIM_TimeBaseStructure.TIM_ClockDivision = 0;
    TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
    TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);

    // 配置TIM3通道1为输入捕获模式
    TIM_ICInitStructure.TIM_Channel = TIM_Channel_1;
    TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising;
    TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI;
    TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;
    TIM_ICInitStructure.TIM_ICFilter = 0x0;
    TIM_ICInit(TIM3, &TIM_ICInitStructure);

    // 配置DMA1通道6为定时器3的输入捕获通道1
    DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)&(TIM3->CCR1);
    DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)&duration;
    DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
    DMA_InitStructure.DMA_BufferSize = 1;
    DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
    DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
    DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
    DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
    DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
    DMA_InitStructure.DMA_Priority = DMA_Priority_High;
    DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
    DMA_Init(DMA1_Channel6, &DMA_InitStructure);

    // 启动DMA1通道6
    DMA_Cmd(DMA1_Channel6, ENABLE);

    // 启动TIM3计数器
    TIM_Cmd(TIM3, ENABLE);
}

float GetPWM_DutyCycle(void)
{
    float dutyCycle = 0.0;

    // 等待DMA传输完成
    while (DMA_GetFlagStatus(DMA1_FLAG_TC6) == RESET);

    // 获取捕获时间
    uint32_t duration = TIM3->CCR1;

    // 计算占空比
    dutyCycle = (float)duration / TIMER_PERIOD * 100.0;

    // 清除DMA传输完成标志
    DMA_ClearFlag(DMA1_FLAG_TC6);

    return dutyCycle;
}

int main(void)
{
    float dutyCycle = 0.0;

    TIM3_PWM_Input_Init();

    while (1)
    {
        // 获取占空比
        dutyCycle = GetPWM_DutyCycle();
        // 打印占空比
        printf("PWM Duty Cycle: %.2f%%\n", dutyCycle);

        // 延时一段时间
        delay_ms(1000);
    }
}

请注意，以上代码仅为示例，你可能需要根据你的具体硬件和需求进行适当的修改和调整。同时，确保在使用printf函数之前，你已经正确配置了串口通信。

希望这个示例能够帮助到你！如果有任何问题，请随时提问。