RIOT/boards/esp32s2-lilygo-ttgo-t8/include/periph_conf.h

/*
 * Copyright (C) 2022 Gunar Schorcht
 *
 * This file is subject to the terms and conditions of the GNU Lesser
 * General Public License v2.1. See the file LICENSE in the top level
 * directory for more details.
 */

/**
 * @ingroup     boards_esp32s2_lilygo_ttgo_t8
 * @brief       Peripheral configurations for the LILYGO TTGO T8 ESP32-S2 board
 * @{
 *
 * The peripheral configurations in this file can be used for the
 * LILYGO TTGO T8 ESP32-S2 board.
 *
 * For detailed information about the peripheral configuration for ESP32-S2
 * boards, see section \ref esp32_peripherals "Common Peripherals".
 *
 * @note
 * Most definitions can be overridden by an
 * \ref esp32_application_specific_configurations
 * "application-specific board configuration" if necessary.
 *
 * @file
 * @author      Gunar Schorcht <gunar@schorcht.net>
 */

#ifndef PERIPH_CONF_H
#define PERIPH_CONF_H

#include <stdint.h>

#ifdef __cplusplus
extern "C" {
#endif

/**
 * @name    ADC and DAC channel configuration
 * @{
 */
/**
 * @brief   Declaration of GPIOs that can be used as ADC channels
 *
 * All ADC pins of ADC1 that are broken out are declared as ADC channels except
 * GPIO3 which is a strapping pin. GPIO7 and GPIO8 are also used by `I2C_DEV(0)`
 * if enabled. GPIO9 is not broken out and used to measure V_BAT.
 *
 * @note As long as the GPIOs listed in ADC_GPIOS are not initialized as ADC
 * channels with the `adc_init` function, they can be used for other
 * purposes.
 */
#ifndef ADC_GPIOS
#define ADC_GPIOS   { GPIO1, GPIO2, GPIO4, GPIO5, GPIO6, GPIO7, GPIO8, GPIO9 }
#endif

/**
 * @brief   Declaration of GPIOs that can be used as DAC channels
 *
 * @note As long as the GPIOs listed in DAC_GPIOS are not initialized as DAC
 * channels with the `dac_init` function, they can be used for other
 * purposes.
 */
#ifndef DAC_GPIOS
#define DAC_GPIOS   { GPIO17, GPIO18 }
#endif
/** @} */

/**
 * @name   I2C configuration
 *
 * Only one I2C interface I2C_DEV(0) is defined.
 *
 * The GPIOs listed in the configuration are only initialized as I2C signals
 * when module `periph_i2c` is used. Otherwise they are not allocated and
 * can be used for other purposes.
 *
 * @{
 */
#ifndef I2C0_SPEED
#define I2C0_SPEED  I2C_SPEED_FAST  /**< I2C bus speed of I2C_DEV(0) */
#endif
#ifndef I2C0_SCL
#define I2C0_SCL    GPIO7           /**< SCL signal of I2C_DEV(0) */
#endif
#ifndef I2C0_SDA
#define I2C0_SDA    GPIO8           /**< SDA signal of I2C_DEV(0) */
#endif
/** @} */

/**
 * @name   PWM channel configuration
 *
 * Two PWM devices are configured. These devices
 * contain all GPIOs that are not defined as I2C, SPI or UART for this board.
 * Generally, all outputs pins could be used as PWM channels.
 *
 * @note As long as the according PWM device is not initialized with
 * the `pwm_init`, the GPIOs declared for this device can be used
 * for other purposes.
 *
 * @{
 */

/**
 * @brief Declaration of the channels for device PWM_DEV(0),
 *        at maximum PWM_CHANNEL_NUM_DEV_MAX.
 */
#ifndef PWM0_GPIOS
#define PWM0_GPIOS  { GPIO39, GPIO40, GPIO41, GPIO42 }
#endif

/**
 * @brief Declaration of the channels for device PWM_DEV(1),
 *        at maximum PWM_CHANNEL_NUM_DEV_MAX.
 *
 * These PWM channels cannot be used if an external 32 kHz crystal is
 * connected to the board at GPIO15 and GPIO16 (configured by the DIP switches).
 */
#ifndef MODULE_ESP_RTC_TIMER_32K
#ifndef PWM1_GPIOS
#define PWM1_GPIOS  { GPIO15, GPIO16 }
#endif
#endif

/** @} */

/**
 * @name    SPI configuration
 *
 * SPI_DEV(0) is used for the Display. The GPIOs are not broken out.<br>
 * SPI_DEV(1) is used for the SD Card slot. The GPIOs are broken out and can
 * also be used by other devices.
 *
 * @note The GPIOs listed in the configuration are first initialized as SPI
 * signals when the corresponding SPI interface is used for the first time
 * by either calling the `spi_init_cs` function or the `spi_acquire`
 * function. That is, they are not allocated as SPI signals before and can
 * be used for other purposes as long as the SPI interface is not used.
 * @{
 */

#ifndef SPI0_CTRL
#define SPI0_CTRL   FSPI    /**< FSPI (SPI Controller 2) is used as SPI_DEV(0) */
#endif
#ifndef SPI0_SCK
#define SPI0_SCK    GPIO36  /**< FSPICLK used as signal `OLED_CLK` */
#endif
#ifndef SPI0_MISO
#define SPI0_MISO   GPIO9   /**< FSPIHD dummy (not broken out), GPIO37 is used as DCX */
#endif
#ifndef SPI0_MOSI
#define SPI0_MOSI   GPIO35  /**< FSPID used as Display signal `OLED_MOSI` */
#endif
#ifndef SPI0_CS0
#define SPI0_CS0    GPIO34  /**< FSPICS0 used as Display signal `OLED_CS` */
#endif

#ifndef SPI1_CTRL
#define SPI1_CTRL   HSPI    /**< HSPI (SPI Controller 3) is used as SPI_DEV(1) */
#endif
#ifndef SPI1_SCK
#define SPI1_SCK    GPIO12  /**< SPI SCK */
#endif
#ifndef SPI1_MISO
#define SPI1_MISO   GPIO13  /**< SPI MISO */
#endif
#ifndef SPI1_MOSI
#define SPI1_MOSI   GPIO11  /**< SPI MOSI */
#endif
#ifndef SPI1_CS0
#define SPI1_CS0    GPIO10  /**< SPI CS0 used for Display */
#endif
/** @} */

/**
 * @name   UART configuration
 *
 * ESP32-S2 provides 2 UART interfaces at maximum:
 *
 * UART_DEV(0) uses fixed standard configuration.<br>
 * UART_DEV(1) is not used.<br>
 *
 * @{
 */
#define UART0_TXD   GPIO43  /**< direct I/O pin for UART_DEV(0) TxD, can't be changed */
#define UART0_RXD   GPIO44  /**< direct I/O pin for UART_DEV(0) RxD, can't be changed */

/** @} */

#ifdef __cplusplus
} /* end extern "C" */
#endif

/* include common peripheral definitions as last step */
#include "periph_conf_common.h"

#endif /* PERIPH_CONF_H */
/** @} */