141 lines
4.4 KiB
C
141 lines
4.4 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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* Copyright (c) 2020, Koji Kitayama
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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 "board.h"
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#include "fsl_gpio.h"
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#include "fsl_port.h"
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#include "fsl_clock.h"
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#include "fsl_lpuart.h"
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#include "clock_config.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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void board_init(void)
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{
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/* Enable port clocks for UART/LED/Button pins */
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CLOCK_EnableClock(UART_PIN_CLOCK);
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CLOCK_EnableClock(LED_PIN_CLOCK);
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CLOCK_EnableClock(BUTTON_PIN_CLOCK);
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gpio_pin_config_t led_config = { kGPIO_DigitalOutput, 0 };
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GPIO_PinInit(LED_GPIO, LED_PIN, &led_config);
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PORT_SetPinMux(LED_PORT, LED_PIN, kPORT_MuxAsGpio);
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gpio_pin_config_t button_config = { kGPIO_DigitalInput, 0 };
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GPIO_PinInit(BUTTON_GPIO, BUTTON_PIN, &button_config);
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const port_pin_config_t BUTTON_CFG = {
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kPORT_PullUp,
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kPORT_FastSlewRate,
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kPORT_PassiveFilterDisable,
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kPORT_LowDriveStrength,
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kPORT_MuxAsGpio
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};
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PORT_SetPinConfig(BUTTON_PORT, BUTTON_PIN, &BUTTON_CFG);
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/* PORTA1 (pin 23) is configured as LPUART0_RX */
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PORT_SetPinMux(PORTA, 1U, kPORT_MuxAlt2);
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/* PORTA2 (pin 24) is configured as LPUART0_TX */
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PORT_SetPinMux(PORTA, 2U, kPORT_MuxAlt2);
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SIM->SOPT5 = ((SIM->SOPT5 &
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/* Mask bits to zero which are setting */
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(~(SIM_SOPT5_LPUART0TXSRC_MASK | SIM_SOPT5_LPUART0RXSRC_MASK)))
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/* LPUART0 Transmit Data Source Select: LPUART0_TX pin. */
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| SIM_SOPT5_LPUART0TXSRC(SOPT5_LPUART0TXSRC_LPUART_TX)
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/* LPUART0 Receive Data Source Select: LPUART_RX pin. */
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| SIM_SOPT5_LPUART0RXSRC(SOPT5_LPUART0RXSRC_LPUART_RX));
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BOARD_BootClockRUN();
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SystemCoreClockUpdate();
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CLOCK_SetLpuart0Clock(1);
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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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lpuart_config_t uart_config;
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LPUART_GetDefaultConfig(&uart_config);
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uart_config.baudRate_Bps = CFG_BOARD_UART_BAUDRATE;
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uart_config.enableTx = true;
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uart_config.enableRx = true;
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LPUART_Init(UART_PORT, &uart_config, CLOCK_GetFreq(kCLOCK_McgIrc48MClk));
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// USB
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CLOCK_EnableUsbfs0Clock(kCLOCK_UsbSrcIrc48M, 48000000U);
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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(LED_GPIO, 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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return BUTTON_STATE_ACTIVE == GPIO_PinRead(BUTTON_GPIO, 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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LPUART_ReadBlocking(UART_PORT, buf, len);
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return len;
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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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LPUART_WriteBlocking(UART_PORT, (uint8_t const*) buf, len);
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return len;
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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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