CcmPinTests.cs

using Meadow;
using Meadow.Hardware;
using Meadow.Logging;
using Meadow.Units;
using System;
using System.Threading;
using System.Threading.Tasks;

namespace CoreComputeBreakout;

public class CcmPinTests
{
    private IMeadowDevice _device;
    private Logger _logger;

    public CcmPinTests(IMeadowDevice device, Logger logger)
    {
        _device = device;
        _logger = logger;
    }

    public static void PulsePwm(IPwmPort pwm, Action? beforeUp = null, Action? beforeDown = null)
    {
        beforeUp?.Invoke();

        for (var i = 0; i < 100; i += 5)
        {
            pwm.DutyCycle = i / 100f;
            Thread.Sleep(100);
        }

        beforeDown?.Invoke();

        for (var i = 100; i > 0; i -= 5)
        {
            pwm.DutyCycle = i / 100f;
            Thread.Sleep(100);
        }
    }

    public async Task TestPulsePWMs(IF7CoreComputeMeadowDevice device, int iterations)
    {
        for (var i = 0; i < iterations; i++)
        {
            foreach (var pin in device.Pins)
            {
                if (pin.Supports<IPwmChannelInfo>())
                {
                    using (var pwm = device.CreatePwmPort(pin, new Frequency(500, Frequency.UnitType.Hertz), dutyCycle: 0f))
                    {
                        pwm.Start();

                        // do it twice to give the user the chance to probe
                        for (int c = 0; c < 2; c++)
                        {
                            PulsePwm(
                                pwm,
                                () => _logger.Info($"Pin {pin.Name} increasing"),
                                () => _logger.Info($"Pin {pin.Name} decreasing")
                                );
                        }
                    }
                }
            }
        }
    }

    public async Task TestSPI5ControlPins(int iterations)
    {
        // this method is intended to allow testing the display control pins with a scope
        var chipSelect = _device.CreateDigitalOutputPort(_device.GetPin("D17"));
        var dc = _device.CreateDigitalOutputPort(_device.GetPin("D18"));
        var reset = _device.CreateDigitalOutputPort(_device.GetPin("D19"));

        await Task.Run(async () =>
        {
            while (iterations > 0)
            {
                var state = false;

                for (int i = 0; i < 20; i++)
                {
                    _logger.Info($"CS {state}");
                    chipSelect.State = state;
                    await Task.Delay(500);
                }

                for (int i = 0; i < 20; i++)
                {
                    _logger.Info($"DC {state}");
                    chipSelect.State = state;
                    await Task.Delay(500);
                }

                for (int i = 0; i < 20; i++)
                {
                    _logger.Info($"RES {state}");
                    chipSelect.State = state;
                    await Task.Delay(500);
                }

                iterations--;
            }
        });
    }
}