104 lines
3.3 KiB
C
104 lines
3.3 KiB
C
/* metadata:
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name: LPCXpresso11U37
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url: https://www.nxp.com/design/design-center/development-boards-and-designs/OM13074
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*/
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#ifndef BOARD_H
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#define BOARD_H
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#define LED_PORT 1
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#define LED_PIN 24
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#define LED_STATE_ON 0
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// Wake up Switch
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#define BUTTON_PORT 0
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#define BUTTON_PIN 16
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#define BUTTON_STATE_ACTIVE 0
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/* System oscillator rate and RTC oscillator rate */
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const uint32_t OscRateIn = 12000000;
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const uint32_t ExtRateIn = 0;
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/* Pin muxing table, only items that need changing from their default pin
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state are in this table. Not every pin is mapped. */
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/* IOCON pin definitions for pin muxing */
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typedef struct {
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uint32_t port : 8; /* Pin port */
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uint32_t pin : 8; /* Pin number */
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uint32_t modefunc : 16; /* Function and mode */
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} PINMUX_GRP_T;
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static const PINMUX_GRP_T pinmuxing[] = {
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{0, 3, (IOCON_FUNC1 | IOCON_MODE_INACT | IOCON_DIGMODE_EN)}, // USB VBUS
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{0, 6, (IOCON_FUNC1 | IOCON_MODE_INACT)}, /* PIO0_6 used for USB_CONNECT */
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{0, 18, (IOCON_FUNC1 | IOCON_MODE_INACT | IOCON_DIGMODE_EN)}, // UART0 RX
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{0, 19, (IOCON_FUNC1 | IOCON_MODE_INACT | IOCON_DIGMODE_EN)}, // UART0 TX
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};
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/* Setup system clocking */
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static inline void Chip_SetupXtalClocking(void) {
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volatile int i;
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/* Powerup main oscillator */
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Chip_SYSCTL_PowerUp(SYSCTL_POWERDOWN_SYSOSC_PD);
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/* Wait 200us for OSC to be stablized, no status
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indication, dummy wait. */
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for (i = 0; i < 0x100; i++) {}
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/* Set system PLL input to main oscillator */
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Chip_Clock_SetSystemPLLSource(SYSCTL_PLLCLKSRC_MAINOSC);
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/* Power down PLL to change the PLL divider ratio */
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Chip_SYSCTL_PowerDown(SYSCTL_POWERDOWN_SYSPLL_PD);
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/* Setup PLL for main oscillator rate (FCLKIN = 12MHz) * 4 = 48MHz
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MSEL = 3 (this is pre-decremented), PSEL = 1 (for P = 2)
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FCLKOUT = FCLKIN * (MSEL + 1) = 12MHz * 4 = 48MHz
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FCCO = FCLKOUT * 2 * P = 48MHz * 2 * 2 = 192MHz (within FCCO range) */
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Chip_Clock_SetupSystemPLL(3, 1);
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/* Powerup system PLL */
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Chip_SYSCTL_PowerUp(SYSCTL_POWERDOWN_SYSPLL_PD);
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/* Wait for PLL to lock */
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while (!Chip_Clock_IsSystemPLLLocked()) {}
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/* Set system clock divider to 1 */
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Chip_Clock_SetSysClockDiv(1);
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/* Setup FLASH access to 3 clocks */
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Chip_FMC_SetFLASHAccess(FLASHTIM_50MHZ_CPU);
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/* Set main clock source to the system PLL. This will drive 48MHz
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for the main clock and 48MHz for the system clock */
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Chip_Clock_SetMainClockSource(SYSCTL_MAINCLKSRC_PLLOUT);
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/* Set USB PLL input to main oscillator */
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Chip_Clock_SetUSBPLLSource(SYSCTL_PLLCLKSRC_MAINOSC);
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/* Setup USB PLL (FCLKIN = 12MHz) * 4 = 48MHz
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MSEL = 3 (this is pre-decremented), PSEL = 1 (for P = 2)
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FCLKOUT = FCLKIN * (MSEL + 1) = 12MHz * 4 = 48MHz
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FCCO = FCLKOUT * 2 * P = 48MHz * 2 * 2 = 192MHz (within FCCO range) */
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Chip_Clock_SetupUSBPLL(3, 1);
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/* Powerup USB PLL */
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Chip_SYSCTL_PowerUp(SYSCTL_POWERDOWN_USBPLL_PD);
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/* Wait for PLL to lock */
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while (!Chip_Clock_IsUSBPLLLocked()) {}
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}
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static inline void Chip_USB_Init(void) {
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/* enable USB main clock */
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Chip_Clock_SetUSBClockSource(SYSCTL_USBCLKSRC_PLLOUT, 1);
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/* Enable AHB clock to the USB block and USB RAM. */
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Chip_Clock_EnablePeriphClock(SYSCTL_CLOCK_USB);
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Chip_Clock_EnablePeriphClock(SYSCTL_CLOCK_USBRAM);
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/* power UP USB Phy */
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Chip_SYSCTL_PowerUp(SYSCTL_POWERDOWN_USBPAD_PD);
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}
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#endif
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