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I want to convert 4 analog input in the same time

Question asked by Sun_Woo.Lee on Mar 31, 2017
Latest reply on Mar 31, 2017 by AvaTar

I want to convert 4 analog input in the same time, I chose the stm32f3 303vdt because it contains 4 ADCs. The problems is that I don't know how to get them working together. I have read that only two of them can work simultaneously ADC1 and ADC2, ADC3 and ADC4.

so i can use DMA setting.

My question is what's configuration have I to do for this stuff?

Dual ADC modes

In devices with two ADCs or more, dual ADC modes can be used (see Figure 69):

  • ADC1 and ADC2 can be used together in dual mode (ADC1 is master)
  • ADC3 and ADC4 can be used together in dual mode (ADC3 is master)

In dual ADC mode, the start of conversion is triggered alternately or simultaneously by the ADCx master to the ADC slave, depending on the mode selected by the bits DUAL[4:0] in the ADCx_CCR register.

Four possible modes are implemented:

  • Injected simultaneous mode
  • Regular simultaneous mode
  • Interleaved mode
  • Alternate trigger mode

how can i dual adc mode?

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