ADCChannel Constructor Validation

Question

Problem: ADCChannel Constructor Validation. Solve this hands-on electronics task on EWskills.

Accepted Answer

#include 
using namespace std;

class ADCChannel {
private:
    int channel;
    int resolution;

public:
    ADCChannel(int ch, int res) {
        // Validate channel
        if (ch < 0) channel = 0;
        else if (ch > 15) channel = 15;
        else channel = ch;

        // Validate resolution
        if (res == 8 || res == 10 || res == 12)
            resolution = res;
        else
            resolution = 12; // safe default
    }

    void print() {
        cout << "CH=" << channel << " RES=" << resolution;
    }
};

int main() {
    int ch, res;
    cin >> ch >> res;

    ADCChannel adc(ch, res);
    adc.print();

    return 0;
}

Explanation & Logic Summary:

The constructor guarantees the object always enters a valid state.
ADC channels are clamped to the hardware-supported range (0–15).
Unsupported ADC resolutions fall back to a safe default (12 bits).
This defensive initialization pattern prevents invalid peripheral configuration in firmware.

Firmware Relevance & Real-World Context:

ADC peripherals accept only limited channel indices and resolution settings.
Invalid configuration can stall peripherals or corrupt data.
Embedded drivers must validate parameters before writing to hardware registers.
This constructor models safe, real-world firmware initialization practices.

96. ADCChannel Constructor Validation