180 lines
6.3 KiB
C
180 lines
6.3 KiB
C
/*
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* The MIT License (MIT)
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*
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* Copyright (c) 2018, hathach (tinyusb.org)
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*
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* This file is part of the TinyUSB stack.
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*/
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#include "../board.h"
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#include "fsl_device_registers.h"
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#include "fsl_gpio.h"
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#include "fsl_power.h"
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#include "fsl_iocon.h"
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//--------------------------------------------------------------------+
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// Forward USB interrupt events to TinyUSB IRQ Handler
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//--------------------------------------------------------------------+
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void USB0_IRQHandler(void)
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{
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tud_int_handler(0);
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}
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//--------------------------------------------------------------------+
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// MACRO TYPEDEF CONSTANT ENUM
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//--------------------------------------------------------------------+
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#define LED_PORT 0
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#define LED_PIN 29
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#define LED_STATE_ON 0
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// WAKE button
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#define BUTTON_PORT 0
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#define BUTTON_PIN 24
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// IOCON pin mux
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#define IOCON_PIO_DIGITAL_EN 0x80u /*!< Enables digital function */
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#define IOCON_PIO_FUNC1 0x01u /*!< Selects pin function 1 */
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#define IOCON_PIO_FUNC7 0x07u /*!< Selects pin function 7 */
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#define IOCON_PIO_INPFILT_OFF 0x0100u /*!< Input filter disabled */
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#define IOCON_PIO_INV_DI 0x00u /*!< Input function is not inverted */
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#define IOCON_PIO_MODE_INACT 0x00u /*!< No addition pin function */
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#define IOCON_PIO_OPENDRAIN_DI 0x00u /*!< Open drain is disabled */
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#define IOCON_PIO_SLEW_STANDARD 0x00u /*!< Standard mode, output slew rate control is enabled */
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/****************************************************************
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name: BOARD_BootClockFROHF96M
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outputs:
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- {id: SYSTICK_clock.outFreq, value: 96 MHz}
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- {id: System_clock.outFreq, value: 96 MHz}
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settings:
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- {id: SYSCON.MAINCLKSELA.sel, value: SYSCON.fro_hf}
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sources:
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- {id: SYSCON.fro_hf.outFreq, value: 96 MHz}
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******************************************************************/
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void BootClockFROHF96M(void)
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{
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/*!< Set up the clock sources */
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/*!< Set up FRO */
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POWER_DisablePD(kPDRUNCFG_PD_FRO_EN); /*!< Ensure FRO is on */
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CLOCK_AttachClk(kFRO12M_to_MAIN_CLK); /*!< Switch to FRO 12MHz first to ensure we can change voltage without
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accidentally being below the voltage for current speed */
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POWER_SetVoltageForFreq(96000000U); /*!< Set voltage for the one of the fastest clock outputs: System clock output */
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CLOCK_SetFLASHAccessCyclesForFreq(96000000U); /*!< Set FLASH wait states for core */
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CLOCK_SetupFROClocking(96000000U); /*!< Set up high frequency FRO output to selected frequency */
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/*!< Set up dividers */
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CLOCK_SetClkDiv(kCLOCK_DivAhbClk, 1U, false); /*!< Set AHBCLKDIV divider to value 1 */
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CLOCK_SetClkDiv(kCLOCK_DivSystickClk, 0U, true); /*!< Reset SYSTICKCLKDIV divider counter and halt it */
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CLOCK_SetClkDiv(kCLOCK_DivSystickClk, 1U, false); /*!< Set SYSTICKCLKDIV divider to value 1 */
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/*!< Set up clock selectors - Attach clocks to the peripheries */
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CLOCK_AttachClk(kFRO_HF_to_MAIN_CLK); /*!< Switch MAIN_CLK to FRO_HF */
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/*!< Set SystemCoreClock variable. */
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SystemCoreClock = 96000000U;
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}
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void board_init(void)
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{
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// Enable IOCON clock
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CLOCK_EnableClock(kCLOCK_Iocon);
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// Enable GPIO0 clock
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CLOCK_EnableClock(kCLOCK_Gpio0);
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// Init 96 MHz clock
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BootClockFROHF96M();
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#if CFG_TUSB_OS == OPT_OS_NONE
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// 1ms tick timer
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SysTick_Config(SystemCoreClock / 1000);
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#elif CFG_TUSB_OS == OPT_OS_FREERTOS
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// If freeRTOS is used, IRQ priority is limit by max syscall ( smaller is higher )
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NVIC_SetPriority(USB0_IRQn, configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY );
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#endif
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GPIO_PortInit(GPIO, LED_PORT);
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GPIO_PortInit(GPIO, BUTTON_PORT);
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// LED
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gpio_pin_config_t const led_config = { kGPIO_DigitalOutput, 0};
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GPIO_PinInit(GPIO, LED_PORT, LED_PIN, &led_config);
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board_led_write(true);
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// Button
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gpio_pin_config_t const button_config = { kGPIO_DigitalInput, 0};
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GPIO_PinInit(GPIO, BUTTON_PORT, BUTTON_PIN, &button_config);
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// USB
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const uint32_t port1_pin6_config = (
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IOCON_PIO_FUNC7 | /* Pin is configured as USB0_VBUS */
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IOCON_PIO_MODE_INACT | /* No addition pin function */
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IOCON_PIO_INV_DI | /* Input function is not inverted */
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IOCON_PIO_DIGITAL_EN | /* Enables digital function */
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IOCON_PIO_INPFILT_OFF | /* Input filter disabled */
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IOCON_PIO_OPENDRAIN_DI /* Open drain is disabled */
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);
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IOCON_PinMuxSet(IOCON, 1, 6, port1_pin6_config); /* PORT1 PIN6 (coords: 26) is configured as USB0_VBUS */
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POWER_DisablePD(kPDRUNCFG_PD_USB0_PHY); /*Turn on USB Phy */
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CLOCK_EnableUsbfs0Clock(kCLOCK_UsbSrcFro, CLOCK_GetFreq(kCLOCK_FroHf)); /* enable USB IP clock */
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}
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//--------------------------------------------------------------------+
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// Board porting API
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//--------------------------------------------------------------------+
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void board_led_write(bool state)
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{
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GPIO_PinWrite(GPIO, LED_PORT, LED_PIN, state ? LED_STATE_ON : (1-LED_STATE_ON));
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}
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uint32_t board_button_read(void)
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{
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// active low
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return 1-GPIO_PinRead(GPIO, BUTTON_PORT, BUTTON_PIN);
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}
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int board_uart_read(uint8_t* buf, int len)
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{
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(void) buf; (void) len;
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return 0;
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}
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int board_uart_write(void const * buf, int len)
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{
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(void) buf; (void) len;
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return 0;
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}
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#if CFG_TUSB_OS == OPT_OS_NONE
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volatile uint32_t system_ticks = 0;
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void SysTick_Handler(void)
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{
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system_ticks++;
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}
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uint32_t board_millis(void)
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{
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return system_ticks;
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}
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#endif
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