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Diffstat (limited to 'tinyusb/hw/bsp/lpcxpresso11u37/lpcxpresso11u37.c')
| -rwxr-xr-x | tinyusb/hw/bsp/lpcxpresso11u37/lpcxpresso11u37.c | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/tinyusb/hw/bsp/lpcxpresso11u37/lpcxpresso11u37.c b/tinyusb/hw/bsp/lpcxpresso11u37/lpcxpresso11u37.c new file mode 100755 index 00000000..11f1797a --- /dev/null +++ b/tinyusb/hw/bsp/lpcxpresso11u37/lpcxpresso11u37.c @@ -0,0 +1,208 @@ +/* + * The MIT License (MIT) + * + * Copyright (c) 2019 Ha Thach (tinyusb.org) + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + * + * This file is part of the TinyUSB stack. + */ + +#include "chip.h" +#include "../board.h" + +//--------------------------------------------------------------------+ +// Forward USB interrupt events to TinyUSB IRQ Handler +//--------------------------------------------------------------------+ +void USB_IRQHandler(void) +{ + tud_int_handler(0); +} + +//---------------------------------------------------------------- ----+ +// MACRO TYPEDEF CONSTANT ENUM +//--------------------------------------------------------------------+ +#define LED_PORT 1 +#define LED_PIN 24 +#define LED_STATE_ON 0 + +// Wake up Switch +#define BUTTON_PORT 0 +#define BUTTON_PIN 16 +#define BUTTON_STATE_ACTIVE 0 + +/* System oscillator rate and RTC oscillator rate */ +const uint32_t OscRateIn = 12000000; +const uint32_t ExtRateIn = 0; + +/* Pin muxing table, only items that need changing from their default pin + state are in this table. Not every pin is mapped. */ +/* IOCON pin definitions for pin muxing */ +typedef struct { + uint32_t port : 8; /* Pin port */ + uint32_t pin : 8; /* Pin number */ + uint32_t modefunc : 16; /* Function and mode */ +} PINMUX_GRP_T; + +static const PINMUX_GRP_T pinmuxing[] = +{ + {0, 3, (IOCON_FUNC1 | IOCON_MODE_INACT | IOCON_DIGMODE_EN)}, // USB VBUS + {0, 6, (IOCON_FUNC1 | IOCON_MODE_INACT)}, /* PIO0_6 used for USB_CONNECT */ + + {0, 18, (IOCON_FUNC1 | IOCON_MODE_INACT | IOCON_DIGMODE_EN)}, // UART0 RX + {0, 19, (IOCON_FUNC1 | IOCON_MODE_INACT | IOCON_DIGMODE_EN)}, // UART0 TX +}; + +/* Setup system clocking */ +static void SystemSetupClocking(void) +{ + volatile int i; + + /* Powerup main oscillator */ + Chip_SYSCTL_PowerUp(SYSCTL_POWERDOWN_SYSOSC_PD); + + /* Wait 200us for OSC to be stablized, no status + indication, dummy wait. */ + for (i = 0; i < 0x100; i++) {} + + /* Set system PLL input to main oscillator */ + Chip_Clock_SetSystemPLLSource(SYSCTL_PLLCLKSRC_MAINOSC); + + /* Power down PLL to change the PLL divider ratio */ + Chip_SYSCTL_PowerDown(SYSCTL_POWERDOWN_SYSPLL_PD); + + /* Setup PLL for main oscillator rate (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_SetupSystemPLL(3, 1); + + /* Powerup system PLL */ + Chip_SYSCTL_PowerUp(SYSCTL_POWERDOWN_SYSPLL_PD); + + /* Wait for PLL to lock */ + while (!Chip_Clock_IsSystemPLLLocked()) {} + + /* Set system clock divider to 1 */ + Chip_Clock_SetSysClockDiv(1); + + /* Setup FLASH access to 3 clocks */ + Chip_FMC_SetFLASHAccess(FLASHTIM_50MHZ_CPU); + + /* Set main clock source to the system PLL. This will drive 48MHz + for the main clock and 48MHz for the system clock */ + Chip_Clock_SetMainClockSource(SYSCTL_MAINCLKSRC_PLLOUT); + + /* 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()) {} +} + +// Invoked by startup code +void SystemInit(void) +{ + SystemSetupClocking(); + Chip_Clock_EnablePeriphClock(SYSCTL_CLOCK_RAM1); + + /* Enable IOCON clock */ + Chip_Clock_EnablePeriphClock(SYSCTL_CLOCK_IOCON); + for (uint32_t i = 0; i < (sizeof(pinmuxing) / sizeof(PINMUX_GRP_T)); i++) + { + Chip_IOCON_PinMuxSet(LPC_IOCON, pinmuxing[i].port, pinmuxing[i].pin, pinmuxing[i].modefunc); + } +} + +void board_init(void) +{ + SystemCoreClockUpdate(); + +#if CFG_TUSB_OS == OPT_OS_NONE + // 1ms tick timer + SysTick_Config(SystemCoreClock / 1000); +#elif CFG_TUSB_OS == OPT_OS_FREERTOS + // If freeRTOS is used, IRQ priority is limit by max syscall ( smaller is higher ) + NVIC_SetPriority(USB0_IRQn, configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY ); +#endif + + Chip_GPIO_Init(LPC_GPIO); + + // LED + Chip_GPIO_SetPinDIROutput(LPC_GPIO, LED_PORT, LED_PIN); + + // Button + Chip_GPIO_SetPinDIRInput(LPC_GPIO, BUTTON_PORT, BUTTON_PIN); + + // USB: Setup PLL clock, and power + /* 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); +} + +//--------------------------------------------------------------------+ +// Board porting API +//--------------------------------------------------------------------+ + +void board_led_write(bool state) +{ + Chip_GPIO_SetPinState(LPC_GPIO, LED_PORT, LED_PIN, state ? LED_STATE_ON : (1-LED_STATE_ON)); +} + +uint32_t board_button_read(void) +{ + return BUTTON_STATE_ACTIVE == Chip_GPIO_GetPinState(LPC_GPIO, BUTTON_PORT, BUTTON_PIN); +} + +int board_uart_read(uint8_t* buf, int len) +{ + (void) buf; (void) len; + return 0; +} + +int board_uart_write(void const * buf, int len) +{ + (void) buf; (void) len; + return 0; +} + +#if CFG_TUSB_OS == OPT_OS_NONE +volatile uint32_t system_ticks = 0; +void SysTick_Handler (void) +{ + system_ticks++; +} + +uint32_t board_millis(void) +{ + return system_ticks; +} +#endif |