C++ (Cpp) FlashLED Examples

Example #1

File: spi_example.c Project: RadhikaG/misc

void SPI_LoopbackTest()
{
    SPI_Init();
    char i = SPI_Xfer(5);
    SPI_Close();
    FlashLED(i+1);
}

Example #2

File: main.cpp Project: AbuShaqra/lpc1114fn28

int main(void)
{
	// Set system frequency to 48MHz
	SystemFrequency = ConfigurePLL(12000000UL, 48000000UL);

	// Enable clock to IO Configuration block.  Needed for UART, SPI, I2C, etc...
	SYSCON_SYSAHBCLKCTRL_IOCON(SYSAHBCLKCTRL_ENABLE);
	
  SysTick_Config(SystemFrequency/10000 - 1); // Generate interrupt each .1 ms
	
	// set direction on port 0_7 (pin 28) to output
	GPIO0_DIR(7, GPIO_OUTPUT);	
	GPIO0_DATA(7, 1);  // turn on diagnostic led

	GPIO1_DIR(4, GPIO_OUTPUT);	// configure port 1_5 (pin 14) for output
	GPIO1_DIR(5, GPIO_OUTPUT);	// configure port 1_5 (pin 14) for output

	// PWM output (pin 1) is tied to 1,2EN on H-bridge (SN754410 Quad Half H-bridge)	// 
	SetupPWM();

	MotorDir(0, 0);	// turn on braking at 100%
	MotorPower(0, 100);

	// motor details:
	// 120:1 gearbox
	// 8 teeth on motor gear
	// 32 teeth on gear with optical wheel
	// 4 edges per rot of optical wheel
	// 8/32*120*4 = 106.666 edges per rev
	// At 5.5V max speed with just 2 gears,
	// pulse width is avg 9.5 ms.
	//
	// a full stop should be no edge for about 150ms
	// and motor on brake.
	//
	
	g_motorPos = 0;
	g_motorStop = 0;
	g_motorTime = 0;
	g_motorInc = 0;
	
	// setup interrupts on PIO1_0
	IOCON_PIO1_0_MODE(PIO1_0_MODE_PULLDOWN_RESISTOR);
	GPIO1_DIR(0, GPIO_INPUT);	
	GPIO1_IS(0, GPIO_EDGE_SENSITIVE);
	GPIO1_IBE(0, GPIO_BOTH_EDGES);
	GPIO1_IE(0, GPIO_INTERRUPT_ENABLE);

  NVIC_EnableIRQ(EINT1_IRQn);

	U64 time1, time2, oldTime;
	int pos, oldPos;
	oldTime = 0xFFFFFFFFFFFFFFFF;
	U64 systickcnt;
	int desiredMotorInc;		// g_motorInc can only be changed when in a stopped state

	while (1)
	{
		FlashLED();
		desiredMotorInc = g_motorInc = 1;
		g_motorStop = 100;
		MotorDir(0, 1);
		MotorPower(0, 100);

		while (1)
		{
			do {
				time1 = g_motorTime;
				pos = g_motorPos;
				time2 = g_motorTime;
			} while (time1 != time2);

			if (pos > g_motorStop)
			{
				desiredMotorInc = -1;
			}
			else if (pos < g_motorStop)
			{
				desiredMotorInc = 1;
			}

			systickcnt = SysTickCnt;
			if ((systickcnt - time2) > 200 /*ms*/)
			{
				// stopped
				if (pos ==  g_motorStop)
				{
					break;	//achieved goal pos and we are stopped
				}
				
				if (desiredMotorInc != g_motorInc)
				{
					g_motorInc = desiredMotorInc;		// g_motorInc must always be 1 or -1, otherwise we lose track of position
					// change direction and turn power back on
					MotorDir(0, desiredMotorInc);
					MotorPower(0, 20);
				}
			}
		}

		FlashLED();
		desiredMotorInc = g_motorInc = -1;
		g_motorStop = 0;
		MotorDir(0, -1);
		MotorPower(0, 100);

		while (1)
		{
			do {
				time1 = g_motorTime;
				pos = g_motorPos;
				time2 = g_motorTime;
			} while (time1 != time2);

			if (pos > g_motorStop)
			{
				desiredMotorInc = -1;
			}
			else if (pos < g_motorStop)
			{
				desiredMotorInc = 1;
			}

			systickcnt = SysTickCnt;
			if ((systickcnt - time2) > 200 /*ms*/)
			{
				// stopped
				if (pos ==  g_motorStop)
				{
					break;	//achieved goal pos and we are stopped
				}
				
				if (desiredMotorInc != g_motorInc)
				{
					g_motorInc = desiredMotorInc;		// g_motorInc must always be 1 or -1, otherwise we lose track of position
					// change direction and turn power back on
					MotorDir(0, desiredMotorInc);
					MotorPower(0, 20);
				}
			}
		}

	}
}