STM32F103和STM32F407的DMA配置有什么区别，请写一个示例程序

STM32F103和STM32F407的DMA配置有以下区别：

1. STM32F407支持更高速的DMA传输，最高可达168MHz；

2. STM32F407支持更多的DMA通道，可达16个通道，而STM32F103只有7个通道；

3. STM32F407支持多缓存区模式，可以实现双缓存或循环缓存的DMA传输；

4. STM32F407支持更多的外设，如USB、SDIO等，这些外设都可以使用DMA传输。

以下是一个基于STM32CubeIDE的示例程序，用于将ADC采集的数据通过DMA传输到SRAM中：

#include "stm32f1xx_hal.h"
#include "stm32f1xx_hal_adc.h"
#include "stm32f1xx_hal_dma.h"

#define ADC_BUFFER_SIZE 100

/* ADC handle declaration */
ADC_HandleTypeDef hadc1;

/* DMA handle declaration */
DMA_HandleTypeDef hdma_adc1;

/* Buffer used for ADC conversion */
uint16_t adc_buffer[ADC_BUFFER_SIZE];

/* Function prototypes */
static void MX_DMA_Init(void);
static void MX_ADC1_Init(void);

int main(void)
{
  /* MCU Configuration--------------------------------------------------------*/

  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
  HAL_Init();

  /* Configure the system clock */
  SystemClock_Config();

  /* Initialize all configured peripherals */
  MX_DMA_Init();
  MX_ADC1_Init();

  /* Start ADC conversion */
  HAL_ADC_Start_DMA(&hadc1, (uint32_t*)adc_buffer, ADC_BUFFER_SIZE);

  while (1)
  {
    /* Do something with the ADC data */
  }
}

/**
  * Initializes the DMA controller for ADC channel 1.
  */
static void MX_DMA_Init(void)
{
  /* DMA controller clock enable */
  __HAL_RCC_DMA1_CLK_ENABLE();

  /* DMA interrupt init */
  /* DMA1_Channel1_IRQn interrupt configuration */
  HAL_NVIC_SetPriority(DMA1_Channel1_IRQn, 0, 0);
  HAL_NVIC_EnableIRQ(DMA1_Channel1_IRQn);

  /* DMA1 channel1 configuration */
  hdma_adc1.Instance = DMA1_Channel1;
  hdma_adc1.Init.Direction = DMA_DIR_PERIPH_TO_MEMORY;          // STM32F103和STM32F407的DMA配置区别之一，传输方向不同
  hdma_adc1.Init.PeriphInc = DMA_PINC_DISABLE;
  hdma_adc1.Init.MemInc = DMA_MINC_ENABLE;
  hdma_adc1.Init.PeriphDataAlignment = DMA_PDATAALIGN_HALFWORD;
  hdma_adc1.Init.MemDataAlignment = DMA_MDATAALIGN_HALFWORD;
  hdma_adc1.Init.Mode = DMA_CIRCULAR;                           // STM32F407支持多缓存区模式，STM32F103不支持
  hdma_adc1.Init.Priority = DMA_PRIORITY_HIGH;
  if (HAL_DMA_Init(&hdma_adc1) != HAL_OK)
  {
    Error_Handler();
  }

  /* DMA interrupt init */
  /* DMA1_Channel1_IRQn interrupt configuration */
  HAL_NVIC_SetPriority(DMA1_Channel1_IRQn, 0, 0);
  HAL_NVIC_EnableIRQ(DMA1_Channel1_IRQn);
}

/**
  * Initializes the ADC1 channel 1 with DMA.
  */
static void MX_ADC1_Init(void)
{
  ADC_ChannelConfTypeDef sConfig = {0};

  /* ADC1 clock enable */
  __HAL_RCC_ADC1_CLK_ENABLE();

  /* DMA1 clock enable */
  __HAL_RCC_DMA1_CLK_ENABLE();

  /* ADC1 DMA Init */
  /* ADC1 Init */
  hadc1.Instance = ADC1;
  hadc1.Init.ScanConvMode = ADC_SCAN_ENABLE;
  hadc1.Init.ContinuousConvMode = ENABLE;
  hadc1.Init.DiscontinuousConvMode = DISABLE;
  hadc1.Init.ExternalTrigConv = ADC_SOFTWARE_START;
  hadc1.Init.DataAlign = ADC_DATAALIGN_RIGHT;
  hadc1.Init.NbrOfConversion = 1;
  if (HAL_ADC_Init(&hadc1) != HAL_OK)
  {
    Error_Handler();
  }

  /* Configure regular channel */
  sConfig.Channel = ADC_CHANNEL_1;
  sConfig.Rank = ADC_REGULAR_RANK_1;
  sConfig.SamplingTime = ADC_SAMPLETIME_13CYCLES_5;
  if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
  {
    Error_Handler();
  }

  /* ADC1 DMA Init */
  hdma_adc1.Instance = DMA1_Channel1;
  hdma_adc1.Init.Direction = DMA_DIR_PERIPH_TO_MEMORY;  // STM32F103和STM32F407的DMA配置区别之一，传输方向不同
  hdma_adc1.Init.PeriphInc = DMA_PINC_DISABLE;
  hdma_adc1.Init.MemInc = DMA_MINC_ENABLE;
  hdma_adc1.Init.PeriphDataAlignment = DMA_PDATAALIGN_HALFWORD;
  hdma_adc1.Init.MemDataAlignment = DMA_MDATAALIGN_HALFWORD;
  hdma_adc1.Init.Mode = DMA_CIRCULAR;                   // STM32F407支持多缓存区模式，STM32F103不支持
  hdma_adc1.Init.Priority = DMA_PRIORITY_HIGH;
  if (HAL_DMA_Init(&hdma_adc1) != HAL_OK)
  {
    Error_Handler();
  }

  /* Associate the initialized DMA handle to the the ADC handle */
  __HAL_LINKDMA(&hadc1, DMA_Handle, hdma_adc1);

  /* ADC1 interrupt Init */
  HAL_NVIC_SetPriority(ADC1_IRQn, 0, 0);
  HAL_NVIC_EnableIRQ(ADC1_IRQn);

}

这是一个简单的示例程序，仅供参考。具体的DMA配置需要根据实际应用场景进行调整。