nuttx/boards/arm/stm32l4/stm32l476vg-disco/include/board.h

/****************************************************************************
 * boards/arm/stm32l4/stm32l476vg-disco/include/board.h
 *
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.  The
 * ASF licenses this file to you 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.
 *
 ****************************************************************************/

#ifndef __BOARDS_ARM_STM32L4_STM32L476VG_DISCO_INCLUDE_BOARD_H
#define __BOARDS_ARM_STM32L4_STM32L476VG_DISCO_INCLUDE_BOARD_H

/****************************************************************************
 * Included Files
 ****************************************************************************/

#include <nuttx/config.h>
#ifndef __ASSEMBLY__
#  include <stdint.h>
#endif

#include <arch/board/stm32l476vg-disco-clocking.h>

/****************************************************************************
 * Pre-processor Definitions
 ****************************************************************************/

/* Clocking *****************************************************************/

/* DMA Channel/Stream Selections ********************************************/

/* Stream selections are arbitrary for now but might become important in the
 * future is we set aside more DMA channels/streams.
 */

/* Values defined in arch/arm/src/stm32l4/hardware/stm32l4x6xx_dma.h */

/* XXX are these used on disco? */

#if 0

#define DMACHAN_SDMMC DMACHAN_SDMMC_1     /* 2 choices */

#define DMACHAN_SPI1_RX DMACHAN_SPI1_RX_1 /* 2 choices */
#define DMACHAN_SPI1_TX DMACHAN_SPI1_TX_1 /* 2 choices */

/* UART RX DMA configurations */

#define DMACHAN_USART1_RX DMACHAN_USART1_RX_2

#endif

/* Alternate function pin selections ****************************************/

/* USART1:
 *   RXD: PB7
 *   TXD: PA6
 *
 * these pins are shared with the I2C1, which is used for some onboard
 * devices, so I am disabling USART1, however I'm leaving the declarations
 * here for documentation for anyone who might want to use it instead of
 * those onboard devices.
 */

#if 0
#define GPIO_USART1_RX GPIO_USART1_RX_2    / * PB7  * /
#define GPIO_USART1_TX GPIO_USART1_TX_2    / * PB6  * /
#endif

/* USART2: Connected to STLink Debug via PD5, PD6
 *   RXD: PD6
 *   TXD: PD5
 */

#define GPIO_USART2_RX   GPIO_USART2_RX_2    /* PD6 */
#define GPIO_USART2_TX   GPIO_USART2_TX_2    /* PD5 */

/* I2C
 *
 * The optional _GPIO configurations allow the I2C driver to manually
 * reset the bus to clear stuck slaves.  They match the pin configuration,
 * but are normally-high GPIOs.
 *
 * I2C1 connects to devices on the Discovery board, including the
 * CS43L22 (addr 0x94)  stereo DAC and amplifier.  It shares the
 * pins with USART1, so that port is disabled so we can access the
 * onboard device.
 *
 */

#define GPIO_I2C1_SCL    (GPIO_I2C1_SCL_1|GPIO_OPENDRAIN|GPIO_SPEED_50MHz|GPIO_OUTPUT_SET)
#define GPIO_I2C1_SDA    (GPIO_I2C1_SDA_1|GPIO_OPENDRAIN|GPIO_SPEED_50MHz|GPIO_OUTPUT_SET)
#define GPIO_I2C1_SCL_GPIO \
   (GPIO_OUTPUT|GPIO_OPENDRAIN|GPIO_SPEED_50MHz|GPIO_OUTPUT_SET|GPIO_PORTB|GPIO_PIN6)
#define GPIO_I2C1_SDA_GPIO \
   (GPIO_OUTPUT|GPIO_OPENDRAIN|GPIO_SPEED_50MHz|GPIO_OUTPUT_SET|GPIO_PORTB|GPIO_PIN7)

/* XXX Is I2C2 used on Disco? */

#if 0

#define GPIO_I2C2_SCL    (GPIO_I2C2_SCL_1|GPIO_OPENDRAIN|GPIO_SPEED_50MHz|GPIO_OUTPUT_SET)
#define GPIO_I2C2_SDA    (GPIO_I2C2_SDA_1|GPIO_OPENDRAIN|GPIO_SPEED_50MHz|GPIO_OUTPUT_SET)
#define GPIO_I2C2_SCL_GPIO \
   (GPIO_OUTPUT|GPIO_OPENDRAIN|GPIO_SPEED_50MHz|GPIO_OUTPUT_SET|GPIO_PORTB|GPIO_PIN10)
#define GPIO_I2C2_SDA_GPIO \
   (GPIO_OUTPUT|GPIO_OPENDRAIN|GPIO_SPEED_50MHz|GPIO_OUTPUT_SET|GPIO_PORTB|GPIO_PIN11)

#endif

/* Quad SPI pin mapping */

#define GPIO_QSPI_CS         (GPIO_QSPI_NCS_2 | GPIO_FLOAT | GPIO_PUSHPULL | GPIO_SPEED_100MHz)
#define GPIO_QSPI_IO0        (GPIO_QSPI_BK1_IO0_2 | GPIO_FLOAT | GPIO_PUSHPULL | GPIO_SPEED_100MHz)
#define GPIO_QSPI_IO1        (GPIO_QSPI_BK1_IO1_2 | GPIO_FLOAT | GPIO_PUSHPULL | GPIO_SPEED_100MHz)
#define GPIO_QSPI_IO2        (GPIO_QSPI_BK1_IO2_2 | GPIO_FLOAT | GPIO_PUSHPULL | GPIO_SPEED_100MHz)
#define GPIO_QSPI_IO3        (GPIO_QSPI_BK1_IO3_2 | GPIO_FLOAT | GPIO_PUSHPULL | GPIO_SPEED_100MHz)
#define GPIO_QSPI_SCK        (GPIO_QSPI_CLK_2 | GPIO_FLOAT | GPIO_PUSHPULL | GPIO_SPEED_100MHz)

/* SPI */

/* XXX is SPI1 used on Disco? */

#if 0

#define GPIO_SPI1_MISO   GPIO_SPI1_MISO_1
#define GPIO_SPI1_MOSI   GPIO_SPI1_MOSI_1
#define GPIO_SPI1_SCK    GPIO_SPI1_SCK_1

#endif

/* SPI2 is used for several peripherals on the Discovery board, including
 * L3GD20 - 3 axis Gyroscope
 * LSM303CTR - eCompass, comprising an accelerometer and magnetometer
 */

#define GPIO_SPI2_MISO   GPIO_SPI2_MISO_3
#define GPIO_SPI2_MOSI   GPIO_SPI2_MOSI_3
#define GPIO_SPI2_SCK    GPIO_SPI2_SCK_3

/* PD7; gyroscope CS */

#define GPIO_SPI_CS_GYRO_OFF \
    (GPIO_INPUT | GPIO_PULLDOWN | GPIO_SPEED_2MHz | \
     GPIO_PORTD | GPIO_PIN7)
#define GPIO_SPI_CS_GYRO \
    (GPIO_OUTPUT | GPIO_PUSHPULL | GPIO_SPEED_2MHz | \
     GPIO_OUTPUT_SET | GPIO_PORTD | GPIO_PIN7)

/* PE0; accelerometer CS */

#define GPIO_SPI_CS_ACCEL_OFF \
    (GPIO_INPUT | GPIO_PULLDOWN | GPIO_SPEED_2MHz | \
     GPIO_PORTE | GPIO_PIN0)
#define GPIO_SPI_CS_ACCEL \
    (GPIO_OUTPUT | GPIO_PUSHPULL | GPIO_SPEED_2MHz | \
     GPIO_OUTPUT_SET | GPIO_PORTE | GPIO_PIN0)

/* PC0; magnetometer CS */

#define GPIO_SPI_CS_MAGNETO_OFF \
    (GPIO_INPUT | GPIO_PULLDOWN | GPIO_SPEED_2MHz | \
     GPIO_PORTC | GPIO_PIN0)
#define GPIO_SPI_CS_MAGNETO \
    (GPIO_OUTPUT | GPIO_PUSHPULL | GPIO_SPEED_2MHz | \
     GPIO_OUTPUT_SET | GPIO_PORTC | GPIO_PIN0)

/* XXX these will need to be set up when these get implemented:
 * PD2 gyro INT1
 * PB8 gyro INT2/DRDY
 *
 * PE1 accel INT
 * PC2 magneto DRDY
 * PC1 magneto INT
 */

/* LEDs
 *
 * The STM32L476VG-DISCO board provides two user LEDs, LD4 (red) and LD5
 * (green).
 *
 * PB2 is LD4 (red)
 * PE8 is LD5 (green)
 *   - When the I/O is HIGH value, the LED is on.
 *   - When the I/O is LOW, the LED is off.
 */

/* LED index values for use with board_userled() */

#define BOARD_LED_RED     0
#define BOARD_LED_GRN     1
#define BOARD_NLEDS       2

/* LED bits for use with board_userled_all() */

#define BOARD_LED_RED_BIT (1 << BOARD_LED_RED)
#define BOARD_LED_GRN_BIT (1 << BOARD_LED_GRN)

/* These LEDs are 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/stm32_autoleds.c. The LEDs are used to encode
 * OS-related events as follows when the red and green LEDs are available:
 *
 *   SYMBOL                Meaning               BOARD_LED_GRN  BOARD_LED_RED
 *   -------------------  ----------------------  -----------    ------------
 *   LED_STARTED          NuttX has been started
 *   LED_HEAPALLOCATE     Heap has been allocated
 *   LED_IRQSENABLED      Interrupts enabled
 *   LED_STACKCREATED     Idle stack created
 *   LED_INIRQ            In an interrupt
 *   LED_SIGNAL           In a signal handler
 *   LED_ASSERTION        An assertion failed
 *   LED_PANIC            The system has crashed                  Blinking
 *   LED_IDLE             MCU is is sleep mode       ON
 *
 * Thus if BOARD_LED_GRN, NuttX has successfully booted and is, apparently,
 * running normally.  If BOARD_LED_RED is flashing at approximately 2Hz, then
 * a fatal error has been detected and the system has halted.
 */

#define LED_STARTED      0
#define LED_HEAPALLOCATE 1
#define LED_IRQSENABLED  2
#define LED_STACKCREATED 3
#define LED_INIRQ        4
#define LED_SIGNAL       5
#define LED_ASSERTION    6
#define LED_PANIC        7
#define LED_IDLE         8

/* Buttons
 *
 *  There is a 4 way d-pad 'joystick' with center button
 *  connected to PA0,1,5,2,3
 *                 C L D R U
 */

#define BUTTON_CENTER      0
#define BUTTON_LEFT        1
#define BUTTON_DOWN        2
#define BUTTON_RIGHT       3
#define BUTTON_UP          4
#define NUM_BUTTONS        5

#define BUTTON_CENTER_BIT  (1 << BUTTON_CENTER)
#define BUTTON_LEFT_BIT    (1 << BUTTON_LEFT)
#define BUTTON_DOWN_BIT    (1 << BUTTON_DOWN)
#define BUTTON_RIGHT_BIT   (1 << BUTTON_RIGHT)
#define BUTTON_UP_BIT      (1 << BUTTON_UP)

/****************************************************************************
 * Public Data
 ****************************************************************************/

#ifndef __ASSEMBLY__

#undef EXTERN
#if defined(__cplusplus)
#define EXTERN extern "C"
extern "C"
{
#else
#define EXTERN extern
#endif

/****************************************************************************
 * Public Function Prototypes
 ****************************************************************************/

/****************************************************************************
 * Name: stm32l4_board_initialize
 *
 * Description:
 *   All STM32L4 architectures must provide the following entry point.
 *   This entry point is called early in the initialization -- after all
 *   memory has been configured and mapped but before any devices have been
 *   initialized.
 *
 ****************************************************************************/

void stm32l4_board_initialize(void);

#undef EXTERN
#if defined(__cplusplus)
}
#endif

#endif /* __ASSEMBLY__ */
#endif /* __BOARDS_ARM_STM32L4_STM32L476VG_DISCO_INCLUDE_BOARD_H */