STM8L怎么才能自动产生锯齿波?

只看该作者 · 2015-6-8 14:22

官方的例子是搬移数据实现的.我看DataSheet说可以自动产生锯齿波,但是用下面的代码完全没有波形输出.要产生锯齿波,需要做哪些事情?

void main(void)

{

  CLK_PeripheralClockConfig(CLK_Peripheral_TIM4, ENABLE);

  CLK_PeripheralClockConfig(CLK_Peripheral_DAC, ENABLE);  

  

  TIM4_TimeBaseInit(TIM4_Prescaler_4,0xFF);

  TIM4_SelectOutputTrigger(TIM4_TRGOSource_Update);

  TIM4_Cmd(ENABLE);



  DAC_Init(DAC_Channel_1,DAC_Trigger_T4_TRGO,DAC_OutputBuffer_Enable);

  DAC_WaveGenerationCmd(DAC_Channel_1,DAC_Wave_Triangle,ENABLE);  

  DAC_SetTriangleWaveAmplitude (DAC_Channel_1,DAC_TriangleAmplitude_1023);



  DAC_Cmd(DAC_Channel_1,ENABLE); 



  /* Infinite loop */

  while (1)

  {

  }

}