Triangle-Wave Generation; Figure 44. Dac Conversion (Sw Trigger Enabled) With Lfsr Wave Generation; Figure 45. Dac Triangle Wave Generation - ST STM32F102 Series Reference Manual

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Digital-to-analog converter (DAC)

DAC trigger must be enabled for noise generation, by setting the TENx bit in the DAC_CR

Triangle-wave generation

It is possible to add a small-amplitude triangular waveform on a DC or slowly varying signal.

DAC triangle-wave generation is selected by setting WAVEx[1:0] to "10". The amplitude is

configured through the MAMPx[3:0] bits in the DAC_CR register. An internal triangle counter

is incremented three APB1 clock cycles after each trigger event. The value of this counter is

then added to the DAC_DHRx register without overflow and the sum is stored into the

DAC_DORx register. The triangle counter is incremented while the value transferred into the

DAC_DORx register is less then the maximum amplitude defined by the MAMPx[3:0] bits.

Once the configured amplitude is reached, the counter is decremented down to 0, then

incremented again and so on.

It is possible to reset triangle wave generation by resetting WAVEx[1:0] bits.

MAMPx[3:0] max amplitude

DAC_DHRx base value

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