30 lines
752 B
Markdown
30 lines
752 B
Markdown
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# Example: ADC2
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This test code shows how to configure ADC2 and read the voltage connected to GPIO pin.
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### ADC2 functions:
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ADC1_CHANNEL_7: GPIO27, voltage range [0V..3.1V], the data range [0..4095],
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saturates at about 1.1V.
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DAC_CHANNEL_1: GPIO25, output range [0V..3.3V]
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### Test:
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Please choose the channel (GPIO) to output DAC signals and the channel to input
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signals to ADC by menuconfig:
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make menuconfig
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Then connect two pins by a wire directly.
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E.g. Choose GPIO27 for ADC and GPIO 25 for DAC in menuconfig (default option).
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Then connect them up.
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Connection of ADC and DAC to the same pin is also allowed. In this case, you don't
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have to connect by a wire externally. E.g. choose GPIO 26 for both ADC and DAC in
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menuconfig.
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