public void ChangeDirectionToOutput()
{
var machine = new Machine();
var gpio = new LPC43xx_GPIO(machine);
machine.SystemBus.Register(gpio, new BusRangeRegistration(0x4000A000, 0x400));
// Given a just reseted gpio port
gpio.Reset();
for (var port = 0; port < 8; port++)
{
// When GPIO_DIR it's written to set all pins as outputs
gpio.WriteDoubleWord(GPIO_DIR + 4 * port, 0xFFFFFFFF);
// Then GPIO_DIR should confirm that all pins are outpus
Assert.AreEqual(gpio.ReadDoubleWord(GPIO_DIR + 4 * port), 0xFFFFFFFF);
// And GPIO_MASK should have retained the reset value
Assert.AreEqual(gpio.ReadDoubleWord(GPIO_MASK + 4 * port), 0x00000000);
// And GPIO_PIN should have retained the reset value
Assert.AreEqual(gpio.ReadDoubleWord(GPIO_PIN + 4 * port), 0x00000000);
// And GPIO_MPIN should have retained the reset value
Assert.AreEqual(gpio.ReadDoubleWord(GPIO_MPIN + 4 * port), 0x00000000);
// And GPIO_SET should have retained the reset value
Assert.AreEqual(gpio.ReadDoubleWord(GPIO_SET + 4 * port), 0x00000000);
}
}
public void ChangeMaskedOuputState()
{
var machine = new Machine();
var gpio = new LPC43xx_GPIO(machine);
machine.SystemBus.Register(gpio, new BusRangeRegistration(0x4000A000, 0x400));
gpio.Reset();
for (var port = 0; port < 8; port++)
{
// Given a gpio port with all pins configured as outputs
gpio.WriteDoubleWord(GPIO_DIR + 4 * port, 0xFFFFFFFF);
// And a gpio port with all pins setted to high state
gpio.WriteDoubleWord(GPIO_PIN + 4 * port, 0xFFFFFFFF);
// When GPIO_MASK it's written to set filter out lower half pins
gpio.WriteDoubleWord(GPIO_MASK + 4 * port, 0x0000FFFF);
// Then GPIO_MPORT should return filtered pins in low and not filtered pins in high
Assert.AreEqual(gpio.ReadDoubleWord(GPIO_MPIN + 4 * port), 0xFFFF0000);
// When GPIO_MPORT it's written to set filter pins to low
gpio.WriteDoubleWord(GPIO_MPIN + 4 * port, 0x00000000);
// Then GPIO_PORT should return not filtered pins in low and filtered pins in high
Assert.AreEqual(gpio.ReadDoubleWord(GPIO_PIN + 4 * port), 0x0000FFFF);
// When GPIO_MASK it's written to set filter out upper half pins
gpio.WriteDoubleWord(GPIO_MASK + 4 * port, 0xFFFF0000);
// Then GPIO_MPORT should return filtered pins in low and not filtered pins in high
Assert.AreEqual(gpio.ReadDoubleWord(GPIO_MPIN + 4 * port), 0x0000FFFF);
}
}
public void ChangeMask()
{
var machine = new Machine();
var gpio = new LPC43xx_GPIO(machine);
machine.SystemBus.Register(gpio, new BusRangeRegistration(0x4000A000, 0x400));
gpio.Reset();
for (var port = 0; port < 8; port++)
{
// When GPIO_MASK it's written to set filter out all pins
gpio.WriteDoubleWord(GPIO_MASK + 4 * port, 0xFFFFFFFF);
// Then GPIO_MASK should confirm that all pins are filtered out
Assert.AreEqual(gpio.ReadDoubleWord(GPIO_MASK + 4 * port), 0xFFFFFFFF);
}
}
public void InitTest()
{
var machine = new Machine();
var gpio = new LPC43xx_GPIO(machine);
machine.SystemBus.Register(gpio, new BusRangeRegistration(0x4000A000, 0x400));
// Given a just reseted gpio port
gpio.Reset();
for (var port = 0; port < 8; port++)
{
// Then GPIO_DIR should have a value equal to cero
Assert.AreEqual(gpio.ReadDoubleWord(GPIO_DIR + 4 * port), 0x00000000);
// And GPIO_MASK should have a value equal to cero
Assert.AreEqual(gpio.ReadDoubleWord(GPIO_MASK + 4 * port), 0x00000000);
// And GPIO_SET should have a value equal to cero
Assert.AreEqual(gpio.ReadDoubleWord(GPIO_SET + 4 * port), 0x00000000);
}
}
public void ChangeOutputsState()
{
var machine = new Machine();
var gpio = new LPC43xx_GPIO(machine);
machine.SystemBus.Register(gpio, new BusRangeRegistration(0x4000A000, 0x400));
gpio.Reset();
for (var port = 0; port < 8; port++)
{
// Given a gpio port with all pins configured as outputs
gpio.WriteDoubleWord(GPIO_DIR + 4 * port, 0xFFFFFFFF);
// When GPIO_PIN are writed to set all outpus pins to high state
gpio.WriteDoubleWord(GPIO_PIN + 4 * port, 0xFFFFFFFF);
// Then GPIO_PIN should have the current value of the outputs
Assert.AreEqual(gpio.ReadDoubleWord(GPIO_PIN + 4 * port), 0xFFFFFFFF);
// And GPIO_SET should have the current value of the outputs
Assert.AreEqual(gpio.ReadDoubleWord(GPIO_SET + 4 * port), 0xFFFFFFFF);
// When GPIO_PIN are writed to set all outpus pins to low state
gpio.WriteDoubleWord(GPIO_PIN + 4 * port, 0x00000000);
// Then GPIO_PIN should have the current value of the outputs
Assert.AreEqual(gpio.ReadDoubleWord(GPIO_PIN + 4 * port), 0x00000000);
// And GPIO_SET should have the current value of the outputs
Assert.AreEqual(gpio.ReadDoubleWord(GPIO_SET + 4 * port), 0x00000000);
// When GPIO_SET are writed to set all outpus pins to high state
gpio.WriteDoubleWord(GPIO_SET + 4 * port, 0xFFFFFFFF);
// Then GPIO_PIN should have the current value of the outputs
Assert.AreEqual(gpio.ReadDoubleWord(GPIO_PIN + 4 * port), 0xFFFFFFFF);
// When GPIO_SET are writed to not produce changes in the outputs
gpio.WriteDoubleWord(GPIO_SET + 4 * port, 0x00000000);
// Then GPIO_PIN should have retained the previous value of the outputs
Assert.AreEqual(gpio.ReadDoubleWord(GPIO_PIN + 4 * port), 0xFFFFFFFF);
// When GPIO_CLR are writed to set all outpus pins to low state
gpio.WriteDoubleWord(GPIO_CLR + 4 * port, 0xFFFFFFFF);
// Then GPIO_PIN should have the current value of the outputs
Assert.AreEqual(gpio.ReadDoubleWord(GPIO_PIN + 4 * port), 0x00000000);
// When GPIO_SET are writed to not produce changes in the outputs
gpio.WriteDoubleWord(GPIO_CLR + 4 * port, 0x00000000);
// Then GPIO_PIN should have retained the previous value of the outputs
Assert.AreEqual(gpio.ReadDoubleWord(GPIO_PIN + 4 * port), 0x00000000);
// When GPIO_NOT are writed to change all outpus pins
gpio.WriteDoubleWord(GPIO_NOT + 4 * port, 0xFFFFFFFF);
// Then GPIO_PIN should have the current value of the outputs
Assert.AreEqual(gpio.ReadDoubleWord(GPIO_PIN + 4 * port), 0xFFFFFFFF);
// When GPIO_NOT are writed to change all outpus pins
gpio.WriteDoubleWord(GPIO_NOT + 4 * port, 0xFFFFFFFF);
// Then GPIO_PIN should have the current value of the outputs
Assert.AreEqual(gpio.ReadDoubleWord(GPIO_PIN + 4 * port), 0x00000000);
// When GPIO_NOT are writed to to not produce changes in the outputs
gpio.WriteDoubleWord(GPIO_NOT + 4 * port, 0x00000000);
// Then GPIO_PIN should have retained the previous value of the outputs
Assert.AreEqual(gpio.ReadDoubleWord(GPIO_PIN + 4 * port), 0x00000000);
}
}
