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/*
* The MIT License (MIT)
*
* Copyright (c) 2018, hathach (tinyusb.org)
* Copyright (c) 2020, Koji Kitayama
*
* 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 "../board.h"
#include "board.h"
#include "fsl_gpio.h"
#include "fsl_port.h"
#include "fsl_clock.h"
#include "fsl_lpuart.h"
#include "clock_config.h"
//--------------------------------------------------------------------+
// Forward USB interrupt events to TinyUSB IRQ Handler
//--------------------------------------------------------------------+
void USB0_IRQHandler(void)
{
tud_int_handler(0);
}
void board_init(void)
{
/* Enable port clocks for UART/LED/Button pins */
CLOCK_EnableClock(UART_PIN_CLOCK);
CLOCK_EnableClock(LED_PIN_CLOCK);
CLOCK_EnableClock(BUTTON_PIN_CLOCK);
gpio_pin_config_t led_config = { kGPIO_DigitalOutput, 0 };
GPIO_PinInit(LED_GPIO, LED_PIN, &led_config);
PORT_SetPinMux(LED_PORT, LED_PIN, kPORT_MuxAsGpio);
gpio_pin_config_t button_config = { kGPIO_DigitalInput, 0 };
GPIO_PinInit(BUTTON_GPIO, BUTTON_PIN, &button_config);
const port_pin_config_t BUTTON_CFG = {
kPORT_PullUp,
kPORT_FastSlewRate,
kPORT_PassiveFilterDisable,
kPORT_LowDriveStrength,
kPORT_MuxAsGpio
};
PORT_SetPinConfig(BUTTON_PORT, BUTTON_PIN, &BUTTON_CFG);
/* PORTA1 (pin 23) is configured as LPUART0_RX */
PORT_SetPinMux(PORTA, 1U, kPORT_MuxAlt2);
/* PORTA2 (pin 24) is configured as LPUART0_TX */
PORT_SetPinMux(PORTA, 2U, kPORT_MuxAlt2);
SIM->SOPT5 = ((SIM->SOPT5 &
/* Mask bits to zero which are setting */
(~(SIM_SOPT5_LPUART0TXSRC_MASK | SIM_SOPT5_LPUART0RXSRC_MASK)))
/* LPUART0 Transmit Data Source Select: LPUART0_TX pin. */
| SIM_SOPT5_LPUART0TXSRC(SOPT5_LPUART0TXSRC_LPUART_TX)
/* LPUART0 Receive Data Source Select: LPUART_RX pin. */
| SIM_SOPT5_LPUART0RXSRC(SOPT5_LPUART0RXSRC_LPUART_RX));
BOARD_BootClockRUN();
SystemCoreClockUpdate();
CLOCK_SetLpuart0Clock(1);
#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
lpuart_config_t uart_config;
LPUART_GetDefaultConfig(&uart_config);
uart_config.baudRate_Bps = CFG_BOARD_UART_BAUDRATE;
uart_config.enableTx = true;
uart_config.enableRx = true;
LPUART_Init(UART_PORT, &uart_config, CLOCK_GetFreq(kCLOCK_McgIrc48MClk));
// USB
CLOCK_EnableUsbfs0Clock(kCLOCK_UsbSrcIrc48M, 48000000U);
}
//--------------------------------------------------------------------+
// Board porting API
//--------------------------------------------------------------------+
void board_led_write(bool state)
{
GPIO_PinWrite(LED_GPIO, LED_PIN, state ? LED_STATE_ON : (1-LED_STATE_ON));
}
uint32_t board_button_read(void)
{
return BUTTON_STATE_ACTIVE == GPIO_PinRead(BUTTON_GPIO, BUTTON_PIN);
}
int board_uart_read(uint8_t* buf, int len)
{
LPUART_ReadBlocking(UART_PORT, buf, len);
return len;
}
int board_uart_write(void const * buf, int len)
{
LPUART_WriteBlocking(UART_PORT, (uint8_t*)buf, len);
return len;
}
#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
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