tinyUSB/hw/bsp/kinetis_k32l2/boards/frdm_k32l2a4s/board.h

/*
 * 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.
 */

/* metadata:
   name: Freedom K32L2A4S
   url: https://www.nxp.com/design/design-center/development-boards-and-designs/FRDM-K32L2A4S
*/

#ifndef BOARD_H_
#define BOARD_H_

#include "fsl_device_registers.h"

#define USB_CLOCK_SOURCE kCLOCK_IpSrcFircAsync

// LED
// The Red   LED is on PTE29.
// The Green LED is on PTC4.
// The Blue  LED is on PTE31.
#define LED_PIN_CLOCK         kCLOCK_PortC
#define LED_GPIO              GPIOC
#define LED_PORT              PORTC
#define LED_PIN               4
#define LED_STATE_ON          0

// SW3 button1
#define BUTTON_PIN_CLOCK      kCLOCK_PortE
#define BUTTON_GPIO           GPIOE
#define BUTTON_PORT           PORTE
#define BUTTON_PIN            4
#define BUTTON_STATE_ACTIVE   0

// UART
#define UART_PORT             LPUART0
#define UART_PIN_CLOCK        kCLOCK_PortB
#define UART_PIN_GPIO         GPIOB
#define UART_PIN_PORT         PORTB
#define UART_PIN_RX           16u
#define UART_PIN_TX           17u
#define UART_CLOCK_SOURCE_HZ  CLOCK_GetFreq(kCLOCK_ScgFircClk)

static inline void BOARD_InitBootPins(void) {
  /*
    Enable LPUART0 clock and configure port pins.
    FIR clock is being used so the USB examples work.
  */
  PCC_LPUART0 = 0U;                          /* Clock must be off to set PCS */
  PCC_LPUART0 = PCC_CLKCFG_PCS(
      3U);        /* Select the clock. 1:OSCCLK/Bus Clock, 2:Slow IRC, 3: Fast IRC, 6: System PLL */
  PCC_LPUART0 |= PCC_CLKCFG_CGC(1U);        /* Enable LPUART */

  /* PORTB16 (pin 62) is configured as LPUART0_RX */
  gpio_pin_config_t const lpuart_config_rx = {kGPIO_DigitalInput, 0};
  GPIO_PinInit(UART_PIN_GPIO, UART_PIN_RX, &lpuart_config_rx);
  const port_pin_config_t UART_CFG = {
      kPORT_PullUp,
      kPORT_FastSlewRate,
      kPORT_PassiveFilterDisable,
      kPORT_OpenDrainDisable,
      kPORT_LowDriveStrength,
      kPORT_MuxAsGpio,
      kPORT_UnlockRegister
  };
  PORT_SetPinConfig(UART_PIN_PORT, UART_PIN_RX, &UART_CFG);
  PORT_SetPinMux(UART_PIN_PORT, UART_PIN_RX, kPORT_MuxAlt3);

  /* PORTB17 (pin 63) is configured as LPUART0_TX */
  gpio_pin_config_t const lpuart_config_tx = {kGPIO_DigitalOutput, 0};
  GPIO_PinInit(UART_PIN_GPIO, UART_PIN_TX, &lpuart_config_tx);
  PORT_SetPinMux(UART_PIN_PORT, UART_PIN_TX, kPORT_MuxAlt3);
}

#endif /* BOARD_H_ */