DAC offset problem

spa23 · ‎2013-10-18

Posted on October 18, 2013 at 09:50

HI

I have a small issue with the DAC in a stm32F103, there Is a small offset between DAC_DHR12R1 and DAC_DOR1 registers

The code is pretty simple:

DAC_InitStructure.DAC_Trigger = DAC_Trigger_Software;

DAC_InitStructure.DAC_WaveGeneration = DAC_WaveGeneration_None;

DAC_InitStructure.DAC_OutputBuffer = DAC_OutputBuffer_Enable;

DAC_Init( DAC_Channel_1, &DAC_InitStructure );

DAC_SetChannel1Data( DAC_Align_12b_R, value );

DAC_SoftwareTriggerCmd(DAC_Channel_1, ENABLE);

And the test result:

DAC_DHR12R1 DAC_DOR1

40 41

409 411

1023 1026

2047 2051

3071 3076

4095 5

Has anyone else seen the same problem?

Another thing is that I can�t get it to work with DAC_Trigger_None. any ideas?

#dac

Amel NASRI · ‎2013-10-22

Posted on October 22, 2013 at 11:40

Hi Panduro,

Isn't the commande enabling the DAC Channel1 missed?

DAC_Cmd(DAC_Channel_1, ENABLE);

-Mayla-

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spa23 · ‎2013-10-23

Posted on October 23, 2013 at 09:42

Yes, (copy paste error) I have it in my code.