请问CH32F103R8T6的DMA和DAC无法正常输出是为什么？

之前使用的是STM32，单位采购替换了贵公司的CH32F103R8T6，使用HAL库配置DAC_CH2和DMA circle模式，如何正确修改？

原来的程序如下：


主函数中语句
HAL_DAC_Start_DMA(&hdac,DAC_CHANNEL_2,DAC1_Value,1,DAC_ALIGN_12B_R);


dac.c中语句
void MX_DAC_Init(void)
{
  DAC_ChannelConfTypeDef sConfig = {0};
  hdac.Instance = DAC;
  if (HAL_DAC_Init(&hdac) != HAL_OK)
  {
    Error_Handler();
  }
  sConfig.DAC_Trigger = DAC_TRIGGER_NONE;
  sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_DISABLE;
  if (HAL_DAC_ConfigChannel(&hdac, &sConfig, DAC_CHANNEL_2) != HAL_OK)
  {
    Error_Handler();
  }
}


void HAL_DAC_MspInit(DAC_HandleTypeDef* dacHandle)
{


  GPIO_InitTypeDef GPIO_InitStruct = {0};
  if(dacHandle->Instance==DAC)
  {
    __HAL_RCC_DAC_CLK_ENABLE();
    __HAL_RCC_GPIOA_CLK_ENABLE();


    GPIO_InitStruct.Pin = DAC_Pin;
    GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
    HAL_GPIO_Init(DAC_GPIO_Port, &GPIO_InitStruct);


    hdma_dac_ch2.Instance = DMA2_Channel4;
    hdma_dac_ch2.Init.Direction = DMA_MEMORY_TO_PERIPH;
    hdma_dac_ch2.Init.PeriphInc = DMA_PINC_DISABLE;
    hdma_dac_ch2.Init.MemInc = DMA_MINC_ENABLE;
    hdma_dac_ch2.Init.PeriphDataAlignment = DMA_PDATAALIGN_HALFWORD;
    hdma_dac_ch2.Init.MemDataAlignment = DMA_MDATAALIGN_HALFWORD;
    hdma_dac_ch2.Init.Mode = DMA_CIRCULAR;
    hdma_dac_ch2.Init.Priority = DMA_PRIORITY_LOW;
    if (HAL_DMA_Init(&hdma_dac_ch2) != HAL_OK)
    {
      Error_Handler();
    }


    __HAL_LINKDMA(dacHandle,DMA_Handle2,hdma_dac_ch2);
  }
}


尝试将DMA2_Channel4修改为DMA1_Channel4，无输出；不使用DMA可以正常输出