text: /* ****************************************************************
  *
  * Copyright 2019 NXP Semiconductors All Rights Reserved.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  *
  ******************************************************************/
  /************************************************************************************
   * os/configs/imxrt1050/include/board.h
   *
   *   Copyright (C) 2018 Gregory Nutt. All rights reserved.
   *   Author: Gregory Nutt <gnutt@nuttx.org>
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in
   *    the documentation and/or other materials provided with the
   *    distribution.
   * 3. Neither the name TinyARA nor the names of its contributors may be
   *    used to endorse or promote products derived from this software
   *    without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
   * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
   * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
   * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
   * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
   * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
   * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
   * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   * POSSIBILITY OF SUCH DAMAGE.
   *
   ************************************************************************************/
  
  #ifndef __CONFIGS_IMXRT1050_EVK_INCLUDE_BOARD_H
  #define __CONFIGS_IMXRT1050_EVK_INCLUDE_BOARD_H
  
  /************************************************************************************
   * Included Files
   ************************************************************************************/
  
  #include <tinyara/config.h>
  
  /************************************************************************************
   * Pre-processor Definitions
   ************************************************************************************/
  
  /* Clocking *************************************************************************/
  
  /* Set VDD_SOC to 1.5V */
  
  #define IMXRT_VDD_SOC (0x12)
  
  /* Set Arm PLL (PLL1) to  fOut    = (24Mhz * ARM_PLL_DIV_SELECT/2) / ARM_PODF_DIVISOR
   *                        600Mhz  = (24Mhz * ARM_PLL_DIV_SELECT/2) / ARM_PODF_DIVISOR
   *                        ARM_PLL_DIV_SELECT = 100
   *                        ARM_PODF_DIVISOR   = 2
   *                        600Mhz  = (24Mhz * 100/2) / 2
   *
   *     AHB_CLOCK_ROOT             = PLL1fOut / IMXRT_AHB_PODF_DIVIDER
   *     1Hz to 600 Mhz             = 600Mhz / IMXRT_ARM_CLOCK_DIVIDER
   *                        IMXRT_ARM_CLOCK_DIVIDER = 1
   *                        600Mhz  = 600Mhz / 1
   *
   *     PRE_PERIPH_CLK_SEL         = PRE_PERIPH_CLK_SEL_PLL1
   *     PERIPH_CLK_SEL             = 1 (0 select PERIPH_CLK2_PODF, 1 select PRE_PERIPH_CLK_SEL_PLL1)
   *     PERIPH_CLK                 = 600Mhz
   *
   *     IPG_CLOCK_ROOT             = AHB_CLOCK_ROOT / IMXRT_IPG_PODF_DIVIDER
   *                       IMXRT_IPG_PODF_DIVIDER = 4
   *                       150Mhz = 600Mhz / 4
   *
   *     PRECLK_CLOCK_ROOT          = IPG_CLOCK_ROOT / IMXRT_PERCLK_PODF_DIVIDER
   *                       IMXRT_PERCLK_PODF_DIVIDER = 1
   *                       150Mhz = 150Mhz / 1
   *
   *     SEMC_CLK_ROOT              = 600Mhz / IMXRT_SEMC_PODF_DIVIDER (labeled AIX_PODF in 18.2)
   *                       IMXRT_SEMC_PODF_DIVIDER = 8
   *                       75Mhz    = 600Mhz / 8
   *
   * Set Sys PLL (PLL2) to  fOut    = (24Mhz * (20+(2*(DIV_SELECT)))
   *                        528Mhz  = (24Mhz * (20+(2*(1)))
   *
   * Set USB1 PLL (PLL3) to fOut    = (24Mhz * 20)
   *                         480Mhz = (24Mhz * 20)
   */
  
  #define BOARD_XTAL_FREQUENCY     24000000
  #define IMXRT_PRE_PERIPH_CLK_SEL  CCM_CBCMR_PRE_PERIPH_CLK_SEL_PLL1
  #define IMXRT_PERIPH_CLK_SEL      CCM_CBCDR_PERIPH_CLK_SEL_PRE_PERIPH
  #define IMXRT_ARM_PLL_DIV_SELECT  100
  #define IMXRT_ARM_PODF_DIVIDER    2
  #define IMXRT_AHB_PODF_DIVIDER    1
  #define IMXRT_IPG_PODF_DIVIDER    4
  #define IMXRT_PERCLK_CLK_SEL      CCM_CSCMR1_PERCLK_CLK_SEL_IPG_CLK_ROOT
  #define IMXRT_PERCLK_PODF_DIVIDER 9
  #define IMXRT_SEMC_PODF_DIVIDER   8
  
  #define IMXRT_SYS_PLL_SELECT      CCM_ANALOG_PLL_SYS_DIV_SELECT_22
  
  #define BOARD_CPU_FREQUENCY \
  	(BOARD_XTAL_FREQUENCY * (IMXRT_ARM_PLL_DIV_SELECT / 2)) / IMXRT_ARM_PODF_DIVIDER
  
  /* LED definitions ******************************************************************/
  /* There are four LED status indicators located on the EVK Board.  The functions of
   * these LEDs include:
   *
   *   - Main Power Supply(D3)
   *     Green: DC 5V main supply is normal.
   *     Red:   J2 input voltage is over 5.6V.
   *     Off:   The board is not powered.
   *   - Reset RED LED(D15)
   *   - OpenSDA LED(D16)
   *   - USER LED(D18)
   *
   * Only a single LED, D18, is under software control.
   */
  
  /* LED index values for use with board_userled() */
  
  #define BOARD_USERLED     0
  #define BOARD_NLEDS       1
  
  /* LED bits for use with board_userled_all() */
  
  #define BOARD_USERLED_BIT (1 << BOARD_USERLED)
  
  /* This LED is not used by the board port unless CONFIG_ARCH_LEDS is
   * defined.  In that case, the usage by the board port is defined in
   * include/board.h and src/imxrt_autoleds.c. The LED is used to encode
   * OS-related events as follows:
   *
   *   -------------------- ----------------------------- ------
   *   SYMBOL                   Meaning                   LED
   *   -------------------- ----------------------------- ------ */
  
  #define LED_STARTED       0		/* TinyARA has been started  OFF    */
  #define LED_HEAPALLOCATE  0		/* Heap has been allocated OFF    */
  #define LED_IRQSENABLED   0		/* Interrupts enabled      OFF    */
  #define LED_STACKCREATED  1		/* Idle stack created      ON     */
  #define LED_INIRQ         2		/* In an interrupt         N/C    */
  #define LED_SIGNAL        2		/* In a signal handler     N/C    */
  #define LED_ASSERTION     2		/* An assertion failed     N/C    */
  #define LED_PANIC         3		/* The system has crashed  FLASH  */
  #undef  LED_IDLE				/* Not used                       */
  
  /* Thus if the LED is statically on, TinyARA has successfully  booted and is,
   * apparently, running normally.  If the LED is flashing at approximately
   * 2Hz, then a fatal error has been detected and the system has halted.
   */
  
  /* Button definitions ***************************************************************/
  
  /* The IMXRT board has one external user button
   *
   * 1. SW8 (IRQ88)   GPIO5-00
   */
  
  #define BUTTON_SW8        0
  
  #define BUTTON_SW8_BIT    (1 << BUTTON_SW8)
  
  /* PIO Disambiguation ***************************************************************/
  /* LPUARTs
   *
   * Virtual console port provided by OpenSDA:
   *
   *          UART1_TXD   GPIO_AD_B0_12  LPUART1_TX
   *          UART1_RXD   GPIO_AD_B0_13  LPUART1_RX
   *
   *   NOTE: There are no alternative pin configurations for LPUART1.
   *
   * Arduino RS-232 Shield:
   *
   *   J22 D0 UART_RX/D0  GPIO_AD_B1_07  LPUART3_RX
   *   J22 D1 UART_TX/D1  GPIO_AD_B1_06  LPUART3_TX
   */
  
  #define GPIO_LPUART3_RX   GPIO_LPUART3_RX_1	/* GPIO_AD_B1_07 */
  #define GPIO_LPUART3_TX   GPIO_LPUART3_TX_1	/* GPIO_AD_B1_06 */
  
  /* LPI2Cs
   *
   * Arduino Connector
   *
   *   J23 A4 A4/ADC4/SDA  GPIO_AD_B1_01  LPI2C1_SDA
   *   J23 A5 A5/ADC5/SCL  GPIO_AD_B1_00  LPI2C1_SCL
   */
  
  #define GPIO_LPI2C1_SDA   GPIO_LPI2C1_SDA_2	/* GPIO_AD_B1_01 */
  #define GPIO_LPI2C1_SCL   GPIO_LPI2C1_SCL_2	/* GPIO_AD_B1_00 */
  
  #define GPIO_LPI2C3_SDA   GPIO_LPI2C3_SDA_2	/* GPIO_AD_B1_01 */
  #define GPIO_LPI2C3_SCL   GPIO_LPI2C3_SCL_2	/* GPIO_AD_B1_00 */
  
  /************************************************************************************
   * Public Types
   ************************************************************************************/
  
  /************************************************************************************
   * Public Data
   ************************************************************************************/
  
  #ifndef __ASSEMBLY__
  
  #undef EXTERN
  #if defined(__cplusplus)
  #define EXTERN extern "C"
  extern "C" {
  #else
  #define EXTERN extern
  #endif
  
  /************************************************************************************
   * Public Functions
   ************************************************************************************/
  
  #undef EXTERN
  #if defined(__cplusplus)
  }
  #endif
  
  #endif							/* __ASSEMBLY__ */
  #endif							/* __CONFIGS_IMXRT1050_EVK_INCLUDE_BOARD_H */
  