写一段 stm32F103C8T6标准库的定时器3输入通道1和通道2交叉输入模式，且分别上升沿触发和下降沿触发，输入捕获触发DMA1通道6搬运，计算输入方波占空比的代码，不用中断

好的，以下是符合您要求的代码：

#include "stm32f10x.h"

void init_timer_input_capture_DMA(void) {
    // 使能 DMA1 时钟
    RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
    // 使能 TIM3 时钟
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);
    // 使能 GPIOB 时钟
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);

    // 配置 GPIOB.4 和 GPIOB.5 为复用推挽输出模式
    GPIO_InitTypeDef GPIO_InitStructure;
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4 | GPIO_Pin_5;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOB, &GPIO_InitStructure);

    // 配置 TIM3 输入捕获通道1和通道2
    TIM_ICInitTypeDef TIM_ICInitStructure;
    TIM_ICInitStructure.TIM_Channel = TIM_Channel_1;
    TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising; // 上升沿触发
    TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI;
    TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;
    TIM_ICInitStructure.TIM_ICFilter = 0x0;
    TIM_ICInit(TIM3, &TIM_ICInitStructure);

    TIM_ICInitStructure.TIM_Channel = TIM_Channel_2;
    TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Falling; // 下降沿触发
    TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_IndirectTI;
    TIM_ICInit(TIM3, &TIM_ICInitStructure);

    // 配置 TIM3 为输入捕获模式
    TIM_Cmd(TIM3, ENABLE);
    TIM_CtrlPWMOutputs(TIM3, DISABLE);
    TIM_ITConfig(TIM3, TIM_IT_Update, DISABLE);
    TIM_ITConfig(TIM3, TIM_IT_CC1 | TIM_IT_CC2, ENABLE);

    // 配置 DMA1 通道6
    DMA_InitTypeDef DMA_InitStructure;
    DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t) & (TIM3->CCR1);
    DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t) & input_capture_buffer[0];
    DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
    DMA_InitStructure.DMA_BufferSize = 2;
    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);

    // 开始 DMA1 通道6 数据传输
    DMA_Cmd(DMA1_Channel6, ENABLE);
}

uint16_t input_capture_buffer[2];

uint8_t calculate_duty_cycle(void) {
    uint16_t period = input_capture_buffer[1] - input_capture_buffer[0];
    uint16_t duty_cycle = (input_capture_buffer[1] - input_capture_buffer[2]) * 100 / period;
    return duty_cycle;
}

这段代码会初始化定时器 TIM3 的输入捕获通道 1 和通道 2，分别配置为上升沿触发和下降沿触发。当输入捕获事件发生时，会触发 DMA1 通道6 来自动搬运 TIM3 的捕获寄存器的值到 `input_capture_buffer` 数组中。然后通过计算 `input_capture_buffer` 中的数值，可以得到输入方波的占空比。