请教关于STM32F103RCT6的DAC的问题

只看该作者 · 2011-12-8 10:02

我的程序如下：
void DAC_Configuration(void)
{
  DAC_InitTypeDef DAC_InitStructure;
/* DAC Periph clock enable */
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_DAC, ENABLE);
/* DAC channel1 Configuration */
  DAC_DeInit();
  DAC_StructInit(&DAC_InitStructure);
  DAC_InitStructure.DAC_Trigger = DAC_Trigger_Software;
  DAC_InitStructure.DAC_WaveGeneration = DAC_WaveGeneration_None;
  DAC_InitStructure.DAC_LFSRUnmask_TriangleAmplitude =DAC_TriangleAmplitude_4095;
  DAC_InitStructure.DAC_OutputBuffer = DAC_OutputBuffer_Disable;
  DAC_Init(DAC_Channel_1, &DAC_InitStructure);
  DAC_StructInit(&DAC_InitStructure);
  DAC_InitStructure.DAC_Trigger = DAC_Trigger_Software;
  DAC_InitStructure.DAC_WaveGeneration = DAC_WaveGeneration_None;
  DAC_InitStructure.DAC_LFSRUnmask_TriangleAmplitude =DAC_TriangleAmplitude_4095;
  DAC_InitStructure.DAC_OutputBuffer = DAC_OutputBuffer_Disable;
  DAC_Init(DAC_Channel_2, &DAC_InitStructure);
  DAC_Cmd(DAC_Channel_1, ENABLE);
  DAC_Cmd(DAC_Channel_2, ENABLE);
  DAC_SetDualChannelData(DAC_Align_12b_R, 0, 0);
  DAC_DualSoftwareTriggerCmd(ENABLE);
}
不知是哪里不对，现DAC输出用表测量为1V左右，请指点下！谢谢！