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45 lines
1.4 KiB
C
Executable File
45 lines
1.4 KiB
C
Executable File
#pragma once
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/**
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* Convert voltage to dac units
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* @param voltage value in mv
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* @param dacval pointer to value converted to dac units
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* @param vmin minimum voltage in mV
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* @param vmax maximum voltage in mV
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* @param maximum number of steps
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* @returns FAIL when voltage outside limits, OK if conversion successful
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*/
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int Common_VoltageToDac(int voltage, int* dacval, int vmin, int vmax, int nsteps) {
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// validate
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if ((voltage < vmin) || (voltage > vmax)) {
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FILE_LOG(logERROR, ("Voltage value (to convert to dac value) is outside bounds (%d to %d mV): %d\n", vmin, vmax, voltage));
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return FAIL;
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}
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// convert
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*dacval = (int)(((voltage - vmin) / (vmax - vmin)) * (nsteps - 1) + 0.5);
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return OK;
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}
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/**
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* Convert dac units to voltage
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* @param dacval dac units
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* @param voltage pointer to value converted to mV
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* @param vmin minimum voltage in mV
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* @param vmax maximum voltage in mV
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* @param maximum number of steps
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* @returns FAIL when voltage outside limits, OK if conversion successful
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*/
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int Common_DacToVoltage(int dacval, int* voltage, int vmin, int vmax, int nsteps) {
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// validate
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if ((dacval < 0) || (dacval >= nsteps)) {
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FILE_LOG(logERROR, ("Dac units (to convert to voltage) is outside bounds (0 to %d): %d\n", nsteps - 1, dacval));
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return FAIL;
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}
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// convert
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*voltage = vmin + (vmax - vmin) * dacval / (nsteps - 1);
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return OK;
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}
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