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boards: add esp32-wroom-32

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This commit is contained in:
Schorcht 2018-10-08 12:20:49 +02:00
parent 692d6725e2
commit 6226b5dddd
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boards/esp32-wroom-32/Makefile Normal file
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MODULE = board
DIRS = $(RIOTBOARD)/common/esp32
include $(RIOTBASE)/Makefile.base

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include $(RIOTBOARD)/common/esp32/Makefile.dep
# default parameter definitions when module enc28j60 is used
ifneq (, $(filter enc28j60, $(USEMODULE)))
# avoid multiple definitions when package depenedencies are resolved recursively
ifndef ENC28J60_PARAM_DEFINED
export ENC28J60_PARAM_DEFINED = 1
# default definitions
ENC28J60_PARAM_SPI ?= SPI_DEV\(0\)
ENC28J60_PARAM_CS ?= GPIO32
ENC28J60_PARAM_INT ?= GPIO35
ENC28J60_PARAM_RESET ?= GPIO33
CFLAGS += -DENC28J60_PARAM_SPI=$(ENC28J60_PARAM_SPI)
CFLAGS += -DENC28J60_PARAM_CS=$(ENC28J60_PARAM_CS)
CFLAGS += -DENC28J60_PARAM_INT=$(ENC28J60_PARAM_INT)
CFLAGS += -DENC28J60_PARAM_RESET=$(ENC28J60_PARAM_RESET)
# to satisfy variable defintions in tests/driver_enc28j60/Makefile
ENC_SPI = $(ENC28J60_PARAM_SPI)
ENC_CS = $(ENC28J60_PARAM_CS)
ENC_INT = $(ENC28J60_PARAM_INT)
ENC_RST = $(ENC28J60_PARAM_RESET)
endif
endif
# default parameter definitions when module mfr24j40 is used
ifneq (, $(filter mrf24j40, $(USEMODULE)))
# avoid multiple definitions when package depenedencies are resolved recursively
ifndef MRF24J40_PARAM_DEFINED
export MRF24J40_PARAM_DEFINED = 1
# default definitions
MRF24J40_PARAM_SPI = SPI_DEV\(0\)
MRF24J40_PARAM_SPI_CLK = SPI_CLK_1MHZ
MRF24J40_PARAM_CS ?= GPIO16
MRF24J40_PARAM_INT ?= GPIO34
MRF24J40_PARAM_RESET ?= GPIO17
CFLAGS += -DMRF24J40_PARAM_SPI=$(MRF24J40_PARAM_SPI)
CFLAGS += -DMRF24J40_PARAM_SPI_CLK=$(MRF24J40_PARAM_SPI_CLK)
CFLAGS += -DMRF24J40_PARAM_CS=$(MRF24J40_PARAM_CS)
CFLAGS += -DMRF24J40_PARAM_INT=$(MRF24J40_PARAM_INT)
CFLAGS += -DMRF24J40_PARAM_RESET=$(MRF24J40_PARAM_RESET)
endif
endif

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# common board and CPU features
include $(RIOTBOARD)/common/esp32/Makefile.features
# additional features provided by the board
FEATURES_PROVIDED += periph_adc
FEATURES_PROVIDED += periph_dac
FEATURES_PROVIDED += periph_i2c
FEATURES_PROVIDED += periph_pwm
FEATURES_PROVIDED += periph_spi
FEATURES_PROVIDED += arduino

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USEMODULE += boards_common_esp32
include $(RIOTBOARD)/common/esp32/Makefile.include

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/*
* Copyright (C) 2018 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.
*/
/**
* @defgroup boards_esp32_wroom-32 Generic ESP32-WROOM-32 boards
* @ingroup boards_esp32
* @brief Support for generic ESP32-WROOM-32 boards
* @author Gunar Schorcht <gunar@schorcht.net>
## <a name="toc"> Table of Contents </a>
1. [Overview](#overview)
2. [Hardware](#hardware)
1. [MCU](#mcu)
2. [Board Configuration](#board_configuration)
3. [Board Pinout](#pinout)
4. [Optional Hardware Configurations](#optional_hardware)
3. [Flashing the Device](#flashing)
## <a name="overview"> Overview </a> &nbsp;&nbsp; [[TOC](#toc)]
This board definition covers not just a single board, but rather a large set of generic boards that use an ESP32-WROOM-32 module and simply break out all GPIOs to external pads without having any special hardware or interfaces on-board. Examples are Espressif's ESP32-DevKitC or NodeMCU-ESP32S and a large number of clones.
\htmlonly<style>div.image img[src="https://docs.espressif.com/projects/esp-idf/en/latest/_images/esp32-devkitc-functional-overview1.jpg"]{width:600px;}</style>\endhtmlonly
\image html "https://docs.espressif.com/projects/esp-idf/en/latest/_images/esp32-devkitc-functional-overview1.jpg" "Espressif ESP32-DevKitC V4"
## <a name="hardware"> Hardware </a> &nbsp;&nbsp; [[TOC](#toc)]
This section describes
- the [MCU](#mcu),
- the default [board configuration](#board_configuration),
- [optional hardware configurations](#optional_hardware),
- the [board pinout](#pinout).
### <a name="mcu"> MCU </a> &nbsp;&nbsp; [[TOC](#toc)]
Most features of ESP32 boards are provided by the ESP32 SoC. The following table summarizes these features and gives an overview of which of these features are supported by RIOT. For detailed information about the ESP32, see section \ref esp32_mcu "MCU ESP32".
<center>
MCU | ESP32 | Supported by RIOT
------------|-----------|------------------
Vendor | Espressif | |
Cores | 1 or 2 x Tensilica Xtensa LX6 | 1 core
FPU | yes (ULP - Ultra low power co-processor) | no
RAM | 520 kByte SRAM <br> 16 kByte RTC SRAM | yes
ROM | 520 kByte | yes
Flash | 512 kByte ... 16 MByte | yes
Frequency | 240 MHz, 160 MHz, 80 MHz | yes
Power Consumption | 68 mA @ 240 MHz <br> 44 mA @ 160 MHz <br> 31 mA @ 80 MHz <br> 5 uA in deep sleep mode | yes <br> yes <br> yes <br> no
Timers | 4 x 64 bit | yes
ADCs | 2 x SAR-ADC with up to 18 x 12 bit channels total | yes
DACs | 2 x DAC with 8 bit | yes
GPIOs | 34 (6 of them are only inputs) | yes
I2Cs | 2 | yes
SPIs | 4 | yes
UARTs | 3 | yes
WiFi | IEEE 802.11 b/g/n built in | yes
Bluetooth | v4.2 BR/EDR and BLE | no
Ethernet | MAC interface with dedicated DMA and IEEE 1588 support | yes
CAN | version 2.0 | no
IR | up to 8 channels TX/RX | no
Motor PWM | 2 devices x 6 channels | yes
LED PWM | 16 channels | no
Crypto | Hardware acceleration of AES, SHA-2, RSA, ECC, RNG | no
Vcc | 2.5 - 3.6 V | |
Documents | [Datasheet](https://www.espressif.com/sites/default/files/documentation/esp32_datasheet_en.pdf) <br> [Technical Reference](https://www.espressif.com/sites/default/files/documentation/esp32_technical_reference_manual_en.pdf) | |
</center>
### <a name="board_configuration"> Board Configuration </a> &nbsp;&nbsp; [[TOC](#toc)]
Generic ESP32-WROOM-32 boards do not have special hardware on board and all GPIOs are simply broken out for flexibility. Therefore, the board configuration is the most flexible one with provides:
18 x ADC channels at maximum
2 x DAC channels at maximum
2 x SPI at maximum
1 x I2C at maximum
2 x UART
Since all GPIOs have broken out, GPIOs can be used for different purposes in different applications. For flexibility, GPIOs can be listed in various peripheral configurations. For example, GPIO13 is used in the ADC channel definition and the definition of the MOSI signal of SPI_DEV(0).
This is possible because GPIOs are only used for a specific peripheral interface when
- the corresponding peripheral module is used, eg. periph_i2c, or
- a corresponding init function is called z. adc_init, dac_init and pwm_init or
- The corresponding peripheral interface is used for the first time, eg. spi_aqcuire.
That is, the purpose for which a GPIO is used depends on which module or function is used first.
For example, if module periph_i2c is not used, the GPIOs listed in I2C configuration can be used for the other purposes.
The following table shows the default board configuration, which is sorted according to the defined functionality of GPIOs. This configuration can be overridden by \ref esp32_app_spec_conf "application-specific configurations".
<center>
\anchor esp32_wroom_32_table_board_configuration
Function | GPIOs | Remarks |Configuration
:---------------|:-------|:--------|:----------------------------------
BUTTON0 | GPIO0 | | |
ADC | GPIO0, GPIO2, GPIO4, GPIO12, GPIO13, <br> GPIO14, GPIO15, GPIO25, GPIO26, GPIO27, <br> GPIO32, GPIO33, GPIO34, GPIO35, GPIO36, <br> GPIO39 | | see \ref esp32_adc_channels "ADC Channels"
DAC | GPIO25, GPIO26 | | \ref esp32_dac_channels "refer"
PWM_DEV(0) | GPIO0, GPIO2, GPIO4, GPIO16, GPIO17 | - | \ref esp32_pwm_channels "DAC Channels"
PWM_DEV(1) | GPIO27, GPIO32, GPIO33 | - | \ref esp32_pwm_channels "PWM Channels"
I2C_DEV(0):SDA | GPIO21 | | \ref esp32_i2c_interfaces "I2C Interfaces"
I2C_DEV(0):SCL | GPIO22 | | \ref esp32_i2c_interfaces "I2C Interfaces"
SPI_DEV(0):CLK | GPIO18 | VSPI is used | \ref esp32_spi_interfaces "SPI Interfaces"
SPI_DEV(0):MISO | GPIO19 | VSPI is used | \ref esp32_spi_interfaces "SPI Interfaces"
SPI_DEV(0):MOSI | GPIO23 | VSPI is used | \ref esp32_spi_interfaces "SPI Interfaces"
SPI_DEV(0):CS0 | GPIO5 | VSPI is used | \ref esp32_spi_interfaces "SPI Interfaces"
SPI_DEV(1):CLK | GPIO14 | HSPI is used | \ref esp32_spi_interfaces "SPI Interfaces"
SPI_DEV(1):MISO | GPIO12 | HSPI is used | \ref esp32_spi_interfaces "SPI Interfaces"
SPI_DEV(1):MOSI | GPIO13 | HSPI is used | \ref esp32_spi_interfaces "SPI Interfaces"
SPI_DEV(1):CS0 | GPIO15 | HSPI is used | \ref esp32_spi_interfaces "SPI Interfaces"
UART_DEV(0):TxD | GPIO1 | Console (configuration is fixed) | \ref esp32_uart_interfaces "UART interfaces"
UART_DEV(0):RxD | GPIO3 | Console (configuration is fixed) | \ref esp32_uart_interfaces "UART interfaces"
UART_DEV(1):TxD | GPIO10 | not available in **qout** and **qio** flash mode | \ref esp32_uart_interfaces "UART interfaces"
UART_DEV(1):RxD | GPIO9 | not available in **qout** and **qio** flash mode | \ref esp32_uart_interfaces "UART interfaces"
</center>
@note
- The configuration of ADC channels contains all ESP32 GPIOs that can be used as ADC channels.
- The configuration of DAC channels contains all ESP32 GPIOs that can be used as DAC channels.
- GPIO9 and GIOP10 can only be used in **dout** and **dio** \ref esp32_flash_modes "flash modes".
For detailed information about the configuration of ESP32 boards, see section \ref esp32_comm_periph "Common Peripherals".
### <a name="optional_hardware"> Optional Hardware Configurations </a> &nbsp;&nbsp; [[TOC](#toc)]
MRF24J40-based IEEE 802.15.4 radio modules and ENC28J60-based Ethernet network interface modules have been tested with the board. You could use the following code in your \ref esp32_app_spec_conf "application-specific configuration" to use such modules:
```
#ifdef BOARD_ESP32_WROOM-32
#if MODULE_MRF24J40
#define MRF24J40_PARAM_CS GPIO16 /* MRF24J40 CS signal */
#define MRF24J40_PARAM_RESET GPIO17 /* MRF24J40 RESET signal */
#define MRF24J40_PARAM_INT GPIO34 /* MRF24J40 INT signal */
#endif
#if MODULE_ENC28J80
#define ENC28J80_PARAM_CS GPIO32 /* ENC28J80 CS signal */
#define ENC28J80_PARAM_RESET GPIO33 /* ENC28J80 RESET signal */
#define ENC28J80_PARAM_INT GPIO35 /* ENC28J80 INT signal */
endif
#endif
```
For other parameters, the default values defined by the drivers can be used.
@note The **RESET** signal of MRF24J40 and ENC28J60 based modules can also be connected to the **RST** pin of the board (see \ref esp32_wroom_32_pinout "pinout") to keep the configured GPIO free for other purposes.
### <a name="pinout"> Board Pinout </a> &nbsp;&nbsp; [[TOC](#toc)]
The following figure shows the pinout of the defined default configuration for the EPS32-DevKitC board as an example of generic ESP32-WROOM-32 boards. The light green GPIOs are not used by configured on-board hardware components and can be used for any purpose. However, if optional off-board hardware modules are used, these GPIOs may also be occupied, see \ref esp32_wroom_32_table_board_configuration "optional functions" in table board configuration.
The corresponding board schematics can be found her [here](https://dl.espressif.com/dl/schematics/esp32_devkitc_v4-sch-20180607a.pdf)
\anchor esp32_wroom_32_pinout
@image html "https://gitlab.com/gschorcht/RIOT.wiki-Images/raw/master/esp32/ESP32-WROOM-32_pinouts.png?inline=false" "EPS32-DevKitC V4 Pinout"
## <a name="flashing"> Flashing the Device </a> &nbsp;&nbsp; [[TOC](#toc)]
Flashing RIOT is quite easy. The board has a Micro-USB connector with reset/boot/flash logic. Just connect the board to your host computer and type using the programming port:
```
make flash BOARD=esp32-wroom-32 ...
```
For detailed information about ESP32 as well as configuring and compiling RIOT for ESP32 boards, see \ref esp32_riot.
*/

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/*
* Copyright (C) 2018 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_esp32_wroom-32
* @{
*
* @file
* @brief Board specific configuration for the Arduino API
*
* @author Gunar Schorcht <gunar@schorcht.net>
*/
#ifndef ARDUINO_BOARD_H
#define ARDUINO_BOARD_H
#include "periph/gpio.h"
#include "periph/adc.h"
#ifdef __cplusplus
extern "C" {
#endif
/**
* @brief The on-board LED is not available
*/
#define ARDUINO_LED (0)
/**
* @brief Look-up table for the Arduino's digital pins
*/
static const gpio_t arduino_pinmap[] = {
GPIO3, /* ARDUINO_PIN_0 (RxD) */
GPIO1, /* ARDUINO_PIN_1 (TxD) */
GPIO12, /* ARDUINO_PIN_2 */
GPIO27, /* ARDUINO_PIN_3 (PWM) */
GPIO2, /* ARDUINO_PIN_4 */
GPIO32, /* ARDUINO_PIN_5 (PWM) */
GPIO33, /* ARDUINO_PIN_6 (PWM) */
GPIO13, /* ARDUINO_PIN_7 */
GPIO14, /* ARDUINO_PIN_8 */
GPIO0, /* ARDUINO_PIN_9 (PWM) */
GPIO5, /* ARDUINO_PIN_10 (CS0 / PWM) */
GPIO23, /* ARDUINO_PIN_11 (MOSI / PWM) */
GPIO19, /* ARDUINO_PIN_12 (MISO) */
GPIO18, /* ARDUINO_PIN_13 (SCK) */
GPIO25, /* ARDUINO_PIN_A0 */
GPIO26, /* ARDUINO_PIN_A1 */
GPIO4, /* ARDUINO_PIN_A2 */
GPIO15, /* ARDUINO_PIN_A3 */
GPIO21, /* ARDUINO_PIN_A4 (SDA) */
GPIO22, /* ARDUINO_PIN_A5 (SCL) */
};
/**
* @brief Look-up table for the Arduino's analog pins
*/
static const adc_t arduino_analog_map[] = {
GPIO25, /* ARDUINO_PIN_A0 */
GPIO26, /* ARDUINO_PIN_A1 */
GPIO4, /* ARDUINO_PIN_A2 */
GPIO15, /* ARDUINO_PIN_A3 */
GPIO34, /* ARDUINO_PIN_A4 (SDA) */
GPIO35, /* ARDUINO_PIN_A5 (SCL) */
};
#ifdef __cplusplus
}
#endif
#endif /* ARDUINO_BOARD_H */
/** @} */

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/*
* Copyright (C) 2018 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_esp32_wroom-32
* @brief Board specific definitions for generic ESP32-WROOM-32 boards
* @{
*
* This configuration can be used for a large set of ESP32 boards that
* use an ESP32-WROOM-32 module and simply break out all GPIOs to external
* pads without having any special hardware or interfaces on-board.
* Examples are Espressif's EPS32-DEVKIT or NodeMCU-ESP32S and a large
* number of clones.
*
* For detailed information about the configuration of ESP32 boards, see
* section \ref esp32_comm_periph "Common Peripherals".
*
* @note
* Most definitions can be overridden by an \ref esp32_app_spec_conf
* "application-specific board configuration".
*
* @file
* @author Gunar Schorcht <gunar@schorcht.net>
*/
#ifndef BOARD_H
#define BOARD_H
#include <stdint.h>
#ifdef __cplusplus
extern "C" {
#endif
#ifdef __cplusplus
} /* end extern "C" */
#endif
/**
* @name Button pin definitions
* @{
*/
/**
* Generic ESP32 boards have a BOOT button, which can be used as normal button
* during normal operation. Since the GPIO0 pin is pulled up, the button
* signal is inverted, i.e., pressing the button will give a low signal.
*/
#define BUTTON0_PIN GPIO0
/** @} */
/**
* @name LED (on-board) configuration
*
* Generic ESP32 boards usually do not have on-board LEDs.
* @{
*/
/** @} */
/* include common board definitions as last step */
#include "board_common.h"
#endif /* BOARD_H */
/** @} */

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/*
* Copyright (C) 2018 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.
*/
#ifndef GPIO_PARAMS_H
#define GPIO_PARAMS_H
/**
* @ingroup boards_esp32_wroom-32
* @brief Board specific configuration of direct mapped GPIOs
* @file
* @author Gunar Schorcht <gunar@schorcht.net>
* @{
*/
#include "board.h"
#include "saul/periph.h"
#ifdef __cplusplus
extern "C" {
#endif
/**
* @brief LED and Button configuration
*/
static const saul_gpio_params_t saul_gpio_params[] =
{
{
.name = "BOOT",
.pin = BUTTON0_PIN,
.mode = GPIO_IN,
.flags = 0
},
};
#ifdef __cplusplus
}
#endif
#endif /* GPIO_PARAMS_H */
/** @} */

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/*
* Copyright (C) 2018 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_esp32_wroom-32
* @brief Peripheral MCU configuration for generic ESP32-WROOM-32 boards
* @{
*
* This configuration can be used for a large set of ESP32 boards that
* use an ESP32-WROOM-32 module and simply break out all GPIOs to external
* pads without having any special hardware or interfaces on-board.
* Examples are Espressif's EPS32-DEVKIT or NodeMCU-ESP32S and a large
* number of clones.
*
* For detailed information about the configuration of ESP32 boards, see
* section \ref esp32_comm_periph "Common Peripherals".
*
* @note
* Most definitions can be overridden by an \ref esp32_app_spec_conf
* "application-specific board configuration".
*
* @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
*
* For generic boards, all ADC pins that have broken out are declared as ADC
* channels.
*
* @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 { GPIO0 , GPIO2 , GPIO4 , GPIO12, GPIO13, GPIO14, \
GPIO15, GPIO25, GPIO26, GPIO27, GPIO32, GPIO33, \
GPIO34, GPIO35, GPIO36, GPIO39 }
#endif
/**
* @brief Declaration of GPIOs that can be used as DAC channels
*
* For generic boards the 2 DAC lines GPIO25 and GPIO26 are declared 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 { GPIO25, GPIO26 }
#endif
/** @} */
/**
* @name I2C configuration
*
* For generic boards, only one I2C interface I2C_DEV(0) is defined.
*
* The GPIOs listed in the configuration are only initialized as I2C signals
* when module ```perpih_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 GPIO22 /**< SCL signal of I2C_DEV(0) [UEXT1] */
#endif
#ifndef I2C0_SDA
#define I2C0_SDA GPIO21 /**< SDA signal of I2C_DEV(0) [UEXT1] */
#endif
/** @} */
/**
* @name PWM channel configuration
*
* For generic boards, 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 six channels.
*/
#ifndef PWM0_GPIOS
#define PWM0_GPIOS { GPIO0, GPIO2, GPIO4, GPIO16, GPIO17 }
#endif
/**
* @brief Declaration of the channels for device PWM_DEV(1),
* at maximum six channels.
*/
#ifndef PWM1_GPIOS
#define PWM1_GPIOS { GPIO27, GPIO32, GPIO33 }
#endif
/** @} */
/**
* @name SPI configuration
*
* @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_DEV
#define SPI0_DEV VSPI /**< VSPI is used as SPI_DEV(0) */
#endif
#ifndef SPI0_SCK
#define SPI0_SCK GPIO18 /**< VSPI SCK */
#endif
#ifndef SPI0_MISO
#define SPI0_MISO GPIO19 /**< VSPI MISO */
#endif
#ifndef SPI0_MOSI
#define SPI0_MOSI GPIO23 /**< VSPI MOSI */
#endif
#ifndef SPI0_CS0
#define SPI0_CS0 GPIO5 /**< VSPI CS0 */
#endif
#ifndef SPI1_DEV
#define SPI1_DEV HSPI /**< HSPI is used as SPI_DEV(1) */
#endif
#ifndef SPI1_SCK
#define SPI1_SCK GPIO14 /**< HSPI SCK */
#endif
#ifndef SPI1_MISO
#define SPI1_MISO GPIO12 /**< HSPI MISO */
#endif
#ifndef SPI1_MOSI
#define SPI1_MOSI GPIO13 /**< HSPI MOSI */
#endif
#ifndef SPI1_CS0
#define SPI1_CS0 GPIO15 /**< HSPI CS0 */
#endif
/** @} */
/**
* @name UART configuration
*
* ESP32 provides 3 UART interaces at maximum:
*
* UART_DEV(0) uses fixed standard configuration.<br>
* UART_DEV(1) is defined here.<br>
* UART_DEV(2) is not used.<br>
*
* @{
*/
#define UART0_TXD GPIO10 /**< direct I/O pin for UART_DEV(0) TxD, can't be changed */
#define UART0_RXD GPIO9 /**< direct I/O pin for UART_DEV(0) RxD, can't be changed */
#if FLASH_MODE_DOUT || FLASH_MODE_DIO || DOXYGEN
#ifndef UART1_TXD
#define UART1_TXD GPIO10 /**< direct I/O pin for UART_DEV(1) TxD */
#endif
#ifndef UART1_RXD
#define UART1_RXD GPIO9 /**< direct I/O pin for UART_DEV(1) RxD */
#endif
#else
#warning Configuration problem: Flash mode is qio or qout, \
GPIO9 and GPIO10 are not available for UART1 as configured
#endif
/** @} */
#ifdef __cplusplus
} /* end extern "C" */
#endif
/* include common peripheral definitions as last step */
#include "periph_conf_common.h"
#endif /* PERIPH_CONF_H */
/** @} */