C++ Chip_Clock_EnablePeriphClock函数代码示例

void IrTherm_Init(void){

	/* Enable clocks to SWM and IOCON to save power */
	Chip_Clock_EnablePeriphClock(SYSCTL_CLOCK_SWM);
	Chip_Clock_EnablePeriphClock(SYSCTL_CLOCK_IOCON);

	Chip_SWM_MovablePinAssign(SWM_I2C_SDA_IO, 11);
	Chip_SWM_MovablePinAssign(SWM_I2C_SCL_IO, 10);

#if (I2C_BITRATE > 400000)
	/* Enable Fast Mode Plus for I2C pins */
	Chip_IOCON_PinSetI2CMode(LPC_IOCON, IOCON_PIO10, PIN_I2CMODE_FASTPLUS);
	Chip_IOCON_PinSetI2CMode(LPC_IOCON, IOCON_PIO11, PIN_I2CMODE_FASTPLUS);
#else
	Chip_IOCON_PinSetI2CMode(LPC_IOCON, IOCON_PIO10, PIN_I2CMODE_STDFAST);
	Chip_IOCON_PinSetI2CMode(LPC_IOCON, IOCON_PIO11, PIN_I2CMODE_STDFAST);
#endif

	/* Enable I2C clock and reset I2C peripheral - the boot ROM does not do this */
	Chip_I2C_Init();

	/* Setup the I2C handle */
	i2cHandleMaster = LPC_I2CD_API->i2c_setup(LPC_I2C_BASE, i2cMasterHandleMEM);

	/* Set I2C bitrate */
	LPC_I2CD_API->i2c_set_bitrate(i2cHandleMaster, Chip_Clock_GetSystemClockRate(), I2C_BITRATE);

	/* Disable the interrupt for the I2C */
	NVIC_DisableIRQ(I2C_IRQn);

	/* Disable clocks to SWM and IOCON to save power */
	Chip_Clock_DisablePeriphClock(SYSCTL_CLOCK_SWM);
	Chip_Clock_DisablePeriphClock(SYSCTL_CLOCK_IOCON);
}

/* Board UART Initialisation function */
void Board_UART_Init(LPC_USART_T *pUART)
{
	/* Enable the clock to the Switch Matrix */
	Chip_Clock_EnablePeriphClock(SYSCTL_CLOCK_SWM);
	Chip_Clock_SetUARTClockDiv(1);	/* divided by 1 */
	if (pUART == LPC_USART0) {
		/*connect the U0_TXD_O and U0_RXD_I signals to port pins(P0.4, P0.0) */
		Chip_SWM_FixedPinEnable(ACMP_I1, DISABLE);
		Chip_SWM_MovablePinAssign(SWM_U0_TXD_O, PIO4);
		Chip_SWM_MovablePinAssign(SWM_U0_RXD_I, PIO0);
		/* Enable USART0 clock */
		Chip_Clock_EnablePeriphClock(SYSCTL_CLOCK_UART0);	// FIXME UART clocking and reset need to be part of CHIP driver
		/* Peripheral reset control to USART0, a "1" bring it out of reset. */
		Chip_SYSCTL_PeriphReset(RESET_USART0);
	}
	else if (pUART == LPC_USART1) {
		/*connect the U1_TXD_O and U1_RXD_I signals to port pins(P0.13, P0.14) */
		Chip_SWM_MovablePinAssign(SWM_U1_TXD_O, PIO13);
		Chip_SWM_MovablePinAssign(SWM_U1_RXD_I, PIO14);
		/* Enable USART1 clock */
		Chip_Clock_EnablePeriphClock(SYSCTL_CLOCK_UART1);	// FIXME UART clocking and reset need to be part of CHIP driver
		/* Peripheral reset control to USART1, a "1" bring it out of reset. */
		Chip_SYSCTL_PeriphReset(RESET_USART1);
	}
	else {
		/*connect the U2_TXD_O and U2_RXD_I signals to port pins(P0.13, P0.14) */
		Chip_SWM_MovablePinAssign(SWM_U2_TXD_O, PIO13);
		Chip_SWM_MovablePinAssign(SWM_U2_RXD_I, PIO14);
		/* Enable USART2 clock */
		Chip_Clock_EnablePeriphClock(SYSCTL_CLOCK_UART2);	// FIXME UART clocking and reset need to be part of CHIP driver
		/* Peripheral reset control to USART2, a "1" bring it out of reset. */
		Chip_SYSCTL_PeriphReset(RESET_USART2);
	}
}

/* Initialize pin and clocks for USB0/USB1 port */
static void usb_pin_clk_init(void) {
  /* enable USB main clock */
  Chip_Clock_SetUSBClockSource(SYSCTL_USBCLKSRC_PLLOUT, 1);
  /* Enable AHB clock to the USB block and USB RAM. */
  Chip_Clock_EnablePeriphClock(SYSCTL_CLOCK_USB);
  Chip_Clock_EnablePeriphClock(SYSCTL_CLOCK_USBRAM);
  /* power UP USB Phy */
  Chip_SYSCTL_PowerUp(SYSCTL_POWERDOWN_USBPAD_PD);
}

/* Initialize GPIO block */
void Chip_GPIO_Init(LPC_GPIO_T *pGPIO)
{
	Chip_Clock_EnablePeriphClock(SYSCTL_CLOCK_GPIO0);
	Chip_Clock_EnablePeriphClock(SYSCTL_CLOCK_GPIO1);
	Chip_Clock_EnablePeriphClock(SYSCTL_CLOCK_GPIO2);
	Chip_Clock_EnablePeriphClock(SYSCTL_CLOCK_MUX);
	
	Chip_SYSCTL_PeriphReset(RESET_MUX);
}

/* Initializes pin muxing for SPI1 interface - note that SystemInit() may
   already setup your pin muxing at system startup */
static void Init_SPI_PinMux(void)
{
#if (defined(BOARD_NXP_LPCXPRESSO_812) || defined(BOARD_LPC812MAX))
	/* Enable the clock to the Switch Matrix */
	Chip_Clock_EnablePeriphClock(SYSCTL_CLOCK_SWM);
	/*
	 * Initialize SSP0 pins connect
	 * SCK1: PINASSIGN4[31:24]: Select P0.12
	 * MOSI1: PINASSIGN5[7:0]: Select P0.14
	 * MISO1: PINASSIGN5[15:8] : Select P0.6
	 * SSEL1: PINASSIGN5[23:16]: Select P0.13
	 */
	Chip_SWM_DisableFixedPin(SWM_FIXED_VDDCMP);

	Chip_SWM_MovablePinAssign(SWM_SPI0_SCK_IO, 12);
	Chip_SWM_MovablePinAssign(SWM_SPI1_SCK_IO, 7);

	Chip_SWM_MovablePinAssign(SWM_SPI0_MOSI_IO, 14);
	Chip_SWM_MovablePinAssign(SWM_SPI1_MOSI_IO, 9);
#if defined(BOARD_LPC812MAX)
	Chip_SWM_MovablePinAssign(SWM_SPI0_MISO_IO, 15);
	Chip_SWM_MovablePinAssign(SWM_SPI1_MISO_IO, 0);
#else
	Chip_SWM_MovablePinAssign(SWM_SPI0_MISO_IO, 6);
	Chip_SWM_MovablePinAssign(SWM_SPI1_MISO_IO, 1);
#endif
	Chip_SWM_DisableFixedPin(SWM_FIXED_ACMP_I1);
	Chip_SWM_MovablePinAssign(SWM_SPI0_SSEL_IO, 13);
	Chip_SWM_MovablePinAssign(SWM_SPI1_SSEL_IO, 10);

	/* Disable the clock to the Switch Matrix to save power */
	Chip_Clock_DisablePeriphClock(SYSCTL_CLOCK_SWM);
#elif defined(BOARD_NXP_LPCXPRESSO_824)
	/* Enable the clock to the Switch Matrix */
	Chip_Clock_EnablePeriphClock(SYSCTL_CLOCK_SWM);

	/* Master Pins for SPI0 */
	Chip_SWM_MovablePinAssign(SWM_SPI0_SSEL0_IO, 15);
	Chip_SWM_MovablePinAssign(SWM_SPI0_SCK_IO, 24);
	Chip_SWM_MovablePinAssign(SWM_SPI0_MISO_IO, 25);
	Chip_SWM_MovablePinAssign(SWM_SPI0_MOSI_IO, 26);

	/* Slave Pins for SPI1 */
	Chip_SWM_MovablePinAssign(SWM_SPI1_SSEL0_IO, 17);
	Chip_SWM_MovablePinAssign(SWM_SPI1_SCK_IO, 18);
	Chip_SWM_MovablePinAssign(SWM_SPI1_MISO_IO, 28);
	Chip_SWM_MovablePinAssign(SWM_SPI1_MOSI_IO, 16);

	/* Disable the clock to the Switch Matrix to save power */
	Chip_Clock_DisablePeriphClock(SYSCTL_CLOCK_SWM);
#else
	/* Configure your own SPI pin muxing here if needed */
#warning "No SPI pin muxing defined"
#endif
}

/* Set up and initialize hardware prior to call to main */
void Board_SystemInit(void)
{
	/* System clock to the GPIO & the SWM & the IOCON need to be enabled or
  most of the I/O related peripherals won't work. */
	Chip_Clock_EnablePeriphClock(SYSCTL_CLOCK_SWM);
	Chip_Clock_EnablePeriphClock(SYSCTL_CLOCK_GPIO);
	Chip_Clock_EnablePeriphClock(SYSCTL_CLOCK_IOCON);

	/* Setup system clocking and muxing */
	SystemSetupMuxing();
}

/* Set up and initialize all required blocks and functions related to the
   board hardware */
void Board_Init(void)
{
	/* INMUX and IOCON are used by many apps, enable both INMUX and IOCON clock bits here. */
	Chip_Clock_EnablePeriphClock(SYSCON_CLOCK_INPUTMUX);
	Chip_Clock_EnablePeriphClock(SYSCON_CLOCK_IOCON);

	/* Sets up DEBUG UART */
	DEBUGINIT();

	/* Initialize GPIO */
	Chip_GPIO_Init(LPC_GPIO);

	/* Initialize the LEDs. Be careful with below routine, once it's called some of the I/O will be set to output. */
	Board_LED_Init();
}

/* Initializes pin muxing for SPI interface - note that SystemInit() may
   already setup your pin muxing at system startup */
static void Init_SPI_PinMux(void)
{
#if (defined(BOARD_NXP_LPCXPRESSO_1549))

	/* Enable the clock to the Switch Matrix */
	Chip_Clock_EnablePeriphClock(SYSCTL_CLOCK_SWM);
	/*
	 * Initialize SPI0 pins connect
	 * SCK0: PINASSIGN3[15:8]: Select P0.0
	 * MOSI0: PINASSIGN3[23:16]: Select P0.16
	 * MISO0: PINASSIGN3[31:24] : Select P0.10
	 * SSEL0: PINASSIGN4[7:0]: Select P0.9
	 */
	Chip_IOCON_PinMuxSet(LPC_IOCON, 0, 0, (IOCON_MODE_INACT | IOCON_DIGMODE_EN));
	Chip_IOCON_PinMuxSet(LPC_IOCON, 0, 16, (IOCON_MODE_INACT | IOCON_DIGMODE_EN));
	Chip_IOCON_PinMuxSet(LPC_IOCON, 0, 10, (IOCON_MODE_INACT | IOCON_DIGMODE_EN));
	Chip_IOCON_PinMuxSet(LPC_IOCON, 0, 9, (IOCON_MODE_INACT | IOCON_DIGMODE_EN));

	Chip_SWM_MovablePinAssign(SWM_SPI0_SCK_IO, 0);	/* P0.0 */
	Chip_SWM_MovablePinAssign(SWM_SPI0_MOSI_IO, 16);/* P0.16 */
	Chip_SWM_MovablePinAssign(SWM_SPI0_MISO_IO, 10);/* P0.10 */
	Chip_SWM_MovablePinAssign(SWM_SPI0_SSELSN_0_IO, 9);	/* P0.9 */

	/* Disable the clock to the Switch Matrix to save power */
	Chip_Clock_DisablePeriphClock(SYSCTL_CLOCK_SWM);
#else
	/* Configure your own SPI pin muxing here if needed */
#warning "No SPI pin muxing defined"
#endif
}

static void usb_pin_clk_init(void)
{
	/* enable USB main clock */
	Chip_Clock_SetUSBClockSource(SYSCTL_USBCLKSRC_PLLOUT, 1);
	/* Enable AHB clock to the USB block and USB RAM. */
	Chip_Clock_EnablePeriphClock(SYSCTL_CLOCK_USB);
	Chip_Clock_EnablePeriphClock(SYSCTL_CLOCK_USBRAM);
	/* power UP USB Phy */
	Chip_SYSCTL_PowerUp(SYSCTL_POWERDOWN_USBPAD_PD);
	
	/* Enable IOCON clock */
	Chip_Clock_EnablePeriphClock(SYSCTL_CLOCK_IOCON);

	Chip_IOCON_PinMuxSet(LPC_IOCON, 0,  3, (IOCON_FUNC1 | IOCON_MODE_INACT)); 		/* PIO0_3 used for USB_VBUS */
	Chip_IOCON_PinMuxSet(LPC_IOCON, 0,  6,  (IOCON_FUNC1 | IOCON_MODE_INACT));		/* PIO0_6 used for USB_CONNECT */
}

/* Initialize the SPI */
void Chip_SPI_Init(LPC_SPI_T *pSPI, SPI_CONFIG_T *pConfig)
{
	uint32_t EnStat = pSPI->CFG & SPI_CFG_SPI_EN;

	Chip_Clock_EnablePeriphClock((pSPI == LPC_SPI1) ? SYSCTL_CLOCK_SPI1 : SYSCTL_CLOCK_SPI0);
	Chip_SYSCTL_PeriphReset((pSPI == LPC_SPI1) ? RESET_SPI1 : RESET_SPI0);

	/* Disable before update CFG register */
	if (EnStat) {
		Chip_SPI_Disable(pSPI);
	}

	/* SPI Configurate */
	pSPI->CFG = ((uint32_t) pConfig->ClockMode) | ((uint32_t) pConfig->DataOrder) | ((uint32_t) pConfig->Mode) |
				((uint32_t) pConfig->SSELPol);

	/* Rate Divider setting */
	pSPI->DIV = SPI_DIV_VAL(pConfig->ClkDiv);

	/* Clear status flag*/
	Chip_SPI_ClearStatus(pSPI, SPI_STAT_CLR_RXOV | SPI_STAT_CLR_TXUR | SPI_STAT_CLR_SSA | SPI_STAT_CLR_SSD);

	/* Return the previous state */
	if (EnStat) {
		Chip_SPI_Enable(pSPI);
	}
}

void Chip_USB_Init(void)
{
	/* Set USB PLL input to main oscillator */
	Chip_Clock_SetUSBPLLSource(SYSCTL_PLLCLKSRC_MAINOSC);
	/* Setup USB PLL  (FCLKIN = 12MHz) * 4 = 48MHz
	   MSEL = 3 (this is pre-decremented), PSEL = 1 (for P = 2)
	   FCLKOUT = FCLKIN * (MSEL + 1) = 12MHz * 4 = 48MHz
	   FCCO = FCLKOUT * 2 * P = 48MHz * 2 * 2 = 192MHz (within FCCO range) */
	Chip_Clock_SetupUSBPLL(3, 1);

	/* Powerup USB PLL */
	Chip_SYSCTL_PowerUp(SYSCTL_POWERDOWN_USBPLL_PD);

	/* Wait for PLL to lock */
	while (!Chip_Clock_IsUSBPLLLocked()) {}

	/* enable USB main clock */
	Chip_Clock_SetUSBClockSource(SYSCTL_USBCLKSRC_PLLOUT, 1);
	/* Enable AHB clock to the USB block. */
	Chip_Clock_EnablePeriphClock(SYSCTL_CLOCK_USB);
	/* power UP USB Phy */
	Chip_SYSCTL_PowerUp(SYSCTL_POWERDOWN_USBPHY_PD);
	/* Reset USB block */
	Chip_SYSCTL_PeriphReset(RESET_USB);
}

void CAN_baudrate_calculate(uint32_t baud_rate, uint32_t *can_api_timing_cfg)
{
    uint32_t pClk, div, quanta, segs, seg1, seg2, clk_per_bit, can_sjw;
    Chip_Clock_EnablePeriphClock(SYSCTL_CLOCK_CAN);
    pClk = Chip_Clock_GetMainClockRate();

    clk_per_bit = pClk / baud_rate;

    for (div = 0; div <= 15; div++) {
        for (quanta = 1; quanta <= 32; quanta++) {
            for (segs = 3; segs <= 17; segs++) {
                if (clk_per_bit == (segs * quanta * (div + 1))) {
                    segs -= 3;
                    seg1 = segs / 2;
                    seg2 = segs - seg1;
                    can_sjw = seg1 > 3 ? 3 : seg1;
                    can_api_timing_cfg[0] = div;
                    can_api_timing_cfg[1] =
                        ((quanta - 1) & 0x3F) | (can_sjw & 0x03) << 6 | (seg1 & 0x0F) << 8 | (seg2 & 0x07) << 12;
                    return;
                }
            }
        }
    }
}

/* Initialize I2C Interface */
void Chip_I2C_Init(void)
{
	/* Enable I2C clock */
	Chip_Clock_EnablePeriphClock(SYSCTL_CLOCK_I2C);
	/* Peripheral reset control to I2C */
	Chip_SYSCTL_PeriphReset(RESET_I2C);
}

// Initialize the push button
void pb_init(void){
	// Set initial values
	pbState = READY;
	pbTenths = 0;
	pbLongPress = false;
	pbShortPress = false;

	// Set up timer interrupt
	Chip_MRT_IntClear(LPC_MRT_CH(0));
	Chip_MRT_SetEnabled(LPC_MRT_CH(0));

	// Set up pin interrupt
	Chip_PININT_Init(LPC_GPIO_PIN_INT);
	Chip_Clock_EnablePeriphClock(SYSCTL_CLOCK_PININT);
	Chip_SYSCTL_PeriphReset(RESET_PININT);
	Chip_INMUX_PinIntSel(0, 0, PWR_PB_SENSE);
	Chip_PININT_ClearIntStatus(LPC_GPIO_PIN_INT, 1 << 0);
	Chip_PININT_SetPinModeLevel(LPC_GPIO_PIN_INT, 1 << 0);

	PININT_EnableLevelInt(LPC_GPIO_PIN_INT, 1 << 0);
	PININT_LowActive(LPC_GPIO_PIN_INT, 1 << 0); // Enable low first so that initial press is not detected

	NVIC_ClearPendingIRQ(PIN_INT0_IRQn);
	NVIC_EnableIRQ(PIN_INT0_IRQn);
	NVIC_SetPriority(PIN_INT0_IRQn, 0x02); // Set higher than systick, but lower than sampling
}

/* Initialize the ADC peripheral and the ADC setup structure to default value */
void Chip_ADC_Init(LPC_ADC_T *pADC, ADC_CLOCK_SETUP_T *ADCSetup)
{
	uint8_t div;
	uint32_t cr = 0;
	uint32_t clk;

	Chip_Clock_EnablePeriphClock(SYSCTL_CLOCK_ADC);

#if defined(ADC_TRIM_SUPPORT)
	pADC->ADTRM = 0xF00;
#endif
	pADC->INTEN = 0;		/* Disable all interrupts */

	cr |= ADC_CR_PDN;

	ADCSetup->adcRate = ADC_MAX_SAMPLE_RATE;
	ADCSetup->bitsAccuracy = 0;	/* LPC17xx/40xx doesn't support this setting */
	clk = 0;
	ADCSetup->burstMode = false;
	div = getClkDiv(pADC, false, ADCSetup->adcRate, clk);
	cr |= ADC_CR_CLKDIV(div);
#if !defined(ADC_ACC_12BITS)
	cr |= ADC_CR_BITACC(ADCSetup->bitsAccuracy);
#endif /*defined(ADC_ACC_12BITS)*/
	pADC->CR = cr;
}