boards/esp32s2-mini: add definition for ESP32 S2 Mini

boards/common/makefiles/stdio_tinyusb_cdc_acm.dep.mk

@@ -0,0 +1,11 @@
+ifeq (,$(filter stdio_% slipdev_stdio,$(USEMODULE)))
+  # Use stdio_tinyusb_cdc_acm only if no other stdio is requested explicitly.
+  # and usbus is used for any other reason
+  ifneq (,$(filter usbus,$(USEMODULE)))
+    USEMODULE += stdio_cdc_acm
+  else
+    USEMODULE += stdio_tinyusb_cdc_acm
+  endif
+
+  FEATURES_REQUIRED += highlevel_stdio
+endif

boards/esp32s2-wemos-mini/Kconfig

@@ -0,0 +1,24 @@
+# Copyright (c) 2022 Benjamin Valentin
+#
+# 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.
+
+config BOARD
+    default "esp32s2-wemos-mini" if BOARD_ESP32S2_WEMOS_MINI
+
+config BOARD_ESP32S2_WEMOS_MINI
+    bool
+    default y
+    select BOARD_COMMON_ESP32S2
+    select CPU_MODEL_ESP32S2_FN4R2
+    select HAS_PERIPH_ADC
+    select HAS_PERIPH_DAC
+    select HAS_PERIPH_I2C
+    select HAS_PERIPH_PWM
+    select HAS_PERIPH_SPI
+    select HAS_PERIPH_USBDEV
+    select HAS_TINYUSB_DEVICE
+    select HAS_HIGHLEVEL_STDIO
+
+source "$(RIOTBOARD)/common/esp32s2/Kconfig"

boards/esp32s2-wemos-mini/Makefile

@@ -0,0 +1,5 @@
+MODULE = board
+
+DIRS = $(RIOTBOARD)/common/esp32s2
+
+include $(RIOTBASE)/Makefile.base

boards/esp32s2-wemos-mini/Makefile.dep

@@ -0,0 +1,2 @@
+include $(RIOTBOARD)/common/makefiles/stdio_tinyusb_cdc_acm.dep.mk
+include $(RIOTBOARD)/common/esp32s2/Makefile.dep

boards/esp32s2-wemos-mini/Makefile.features

@@ -0,0 +1,15 @@
+CPU_MODEL = esp32s2_fn4r2
+
+# common board and CPU features
+include $(RIOTBOARD)/common/esp32s2/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 += periph_usbdev
+
+FEATURES_PROVIDED += highlevel_stdio
+FEATURES_PROVIDED += tinyusb_device

boards/esp32s2-wemos-mini/Makefile.include

@@ -0,0 +1,9 @@
+PORT_LINUX ?= /dev/ttyACM0
+
+USB_VID ?= $(USB_VID_TESTING)
+USB_PID ?= $(USB_PID_TESTING)
+
+CFLAGS += -DCONFIG_CONSOLE_UART_TX=39
+CFLAGS += -DCONFIG_CONSOLE_UART_RX=37
+
+include $(RIOTBOARD)/common/esp32s2/Makefile.include

boards/esp32s2-wemos-mini/doc.txt

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+/*
+ * Copyright (C) 2022 Benjamin Valentin
+ *
+ * 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_esp32s2-wemos-mini Wemos S2 mini Board
+ * @ingroup     boards_esp32s2
+ * @brief       Support for Wemos S2 mini Board
+ * @author      Benjamin Valentin <[email protected]>
+
+\section esp32s2-wemos-mini Wemos S2 mini
+
+## Overview {#esp32s2-wemos-mini_overview}
+
+\image html "https://www.wemos.cc/en/latest/_images/s2_mini_v1.0.0_4_16x9.jpg" "Wemos S2 mini" width=600px
+
+Documentation for the board can be found on the vendor page:
+
+- [Wemos S2 mini](https://www.wemos.cc/en/latest/s2/s2_mini.html)
+- [Schematic](https://www.wemos.cc/en/latest/_static/files/sch_s2_mini_v1.0.0.pdf)
+
+## Flashing the Device {#esp32s2-wemos-mini_flashing}
+
+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:
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+BOARD=esp32s2-wemos-mini make flash
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+If RIOT is already on the device, it should automatically enter bootloader mode.
+If this does not work or the device is stuck in some other mode, you can force
+it into bootloader mode by pressing the Reset (RST) button while holding the BOOT (0)
+button.
+
+For detailed information about ESP32-S2 as well as configuring and compiling
+RIOT for ESP32-S2 boards, see \ref esp32_riot.
+
+[Back to table of contents](#esp32s2-wemos-mini_toc)
+ */

boards/esp32s2-wemos-mini/esp32s2-wemos-mini.config

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+CONFIG_PACKAGE_TINYUSB=y
+CONFIG_MODULE_STDIO_TINYUSB_CDC_ACM=y

boards/esp32s2-wemos-mini/include/board.h

@@ -0,0 +1,80 @@
+/*
+ * Copyright (C) 2022 Benjamin Valentin
+ *
+ * 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-wemos-mini
+ * @brief       Board definitions for Wemos S2 mini board
+ * @{
+ *
+ * The board definitions in this file is valid for the Wemos S2 mini board.
+ *
+ * @file
+ * @author      Benjamin Valentin <[email protected]>
+ */
+
+#ifndef BOARD_H
+#define BOARD_H
+
+#include <stdint.h>
+
+/**
+ * @name    Button pin definitions
+ * @{
+ */
+
+/**
+ * @brief   Default button GPIO pin definition
+ *
+ * Wemos S2 mini boards have a BOOT button connected to GPIO0, which can be
+ * used as 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 BTN0_PIN        GPIO0
+
+/**
+ * @brief   Default button GPIO mode definition
+ */
+#define BTN0_MODE       GPIO_IN_PU
+
+/**
+ * @brief   Default interrupt flank definition for the button GPIO
+ */
+#ifndef BTN0_INT_FLANK
+#define BTN0_INT_FLANK  GPIO_FALLING
+#endif
+
+/**
+ * @brief   Definition for compatibility with previous versions
+ */
+#define BUTTON0_PIN     BTN0_PIN
+
+/** @} */
+
+/**
+ * @name    LED (on-board) configuration
+ *
+ * @{
+ */
+#define LED0_PIN        GPIO15  /**< LED is connected to GPIO15 */
+#define LED0_ACTIVE     1       /**< LED is high active */
+/** @} */
+
+/* include common board definitions as last step */
+#include "board_common.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifdef __cplusplus
+} /* end extern "C" */
+#endif
+
+#endif /* BOARD_H */
+/** @} */

boards/esp32s2-wemos-mini/include/gpio_params.h

@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2022 Benjamin Valentin
+ *
+ * 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_esp32s2-wemos-mini
+ * @brief       Board specific configuration of direct mapped GPIOs
+ * @file
+ * @author      Benjamin Valentin <[email protected]>
+ * @{
+ */
+
+#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 = "LED",
+        .pin = LED0_PIN,
+        .mode = GPIO_OUT,
+    },
+    {
+        .name = "BOOT",
+        .pin = BTN0_PIN,
+        .mode = BTN0_MODE,
+        .flags = SAUL_GPIO_INVERTED
+    },
+};
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* GPIO_PARAMS_H */
+/** @} */