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current-sense-amplifier.txt
(774 B)
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current-sense-shunt.txt
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voltage-divider.txt
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Editing: current-sense-shunt.txt
Current Sense Shunt =================== When an io-channel measures the voltage over a current sense shunt, the interesting measurement is almost always the current through the shunt, not the voltage over it. This binding describes such a current sense circuit. Required properties: - compatible : "current-sense-shunt" - io-channels : Channel node of a voltage io-channel. - shunt-resistor-micro-ohms : The shunt resistance in microohms. Example: The system current is measured by measuring the voltage over a 3.3 ohms shunt resistor. sysi { compatible = "current-sense-shunt"; io-channels = <&tiadc 0>; /* Divide the voltage by 3300000/1000000 (or 3.3) for the current. */ shunt-resistor-micro-ohms = <3300000>; }; &i2c { tiadc: adc@48 { compatible = "ti,ads1015"; reg = <0x48>; #io-channel-cells = <1>; #address-cells = <1>; #size-cells = <0>; channel@0 { /* IN0,IN1 differential */ reg = <0>; ti,gain = <1>; ti,datarate = <4>; }; }; };
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