esp32/boards: Add new FeatherS2-Neo board definition.

ports/esp32/boards/UM_FEATHERS2NEO/manifest.py

@@ -0,0 +1,2 @@
+include("$(PORT_DIR)/boards/manifest.py")
+freeze("modules")

ports/esp32/boards/UM_FEATHERS2NEO/modules/feathers2neo.py

@@ -0,0 +1,90 @@
+# FeatherS2 Neo MicroPython Helper Library
+# 2021 Seon Rozenblum - Unexpected Maker
+#
+# Project home:
+#   https://unexpectedmaker.com/feathers2-neo
+#
+# 2021-Sep-04 - v0.1 - Initial implementation
+
+# Import required libraries
+from micropython import const
+from machine import Pin, ADC
+import machine, time
+
+# FeatherS2 Neo Hardware Pin Assignments
+
+# Sense Pins
+VBUS_SENSE = const(34)
+VBAT_SENSE = const(2)
+
+# RGB LED Pins
+RGB_DATA = const(40)
+RGB_PWR = const(39)
+
+# RGB MATRIX LED Pins
+RGB_MATRIX_DATA = const(21)
+RGB_MATRIX_PWR = const(4)
+
+# SPI
+SPI_MOSI = const(35)
+SPI_MISO = const(37)
+SPI_CLK = const(36)
+
+# I2C
+I2C_SDA = const(8)
+I2C_SCL = const(9)
+
+# DAC
+DAC1 = const(17)
+DAC2 = const(18)
+
+# Helper functions
+def set_pixel_power(state):
+    """Enable or Disable power to the onboard NeoPixel to either show colour, or to reduce power for deep sleep."""
+    Pin(RGB_PWR, Pin.OUT).value(state)
+
+
+def set_pixel_matrix_power(state):
+    """Enable or Disable power to the onboard NeoPixel RGB Matrix to either show colours, or to reduce power for deep sleep."""
+    Pin(RGB_MATRIX_PWR, Pin.OUT).value(state)
+
+
+def get_battery_voltage():
+    """
+    Returns the current battery voltage. If no battery is connected, returns 4.2V which is the charge voltage
+    This is an approximation only, but useful to detect if the charge state of the battery is getting low.
+    """
+    adc = ADC(Pin(VBAT_SENSE))  # Assign the ADC pin to read
+    measuredvbat = adc.read()  # Read the value
+    measuredvbat /= 8192  # divide by 8192 as we are using the default ADC voltage range of 0-1V
+    measuredvbat *= 4.2  # Multiply by 4.2V, our reference voltage
+    return round(measuredvbat, 2)
+
+
+def get_vbus_present():
+    """Detect if VBUS (5V) power source is present"""
+    return Pin(VBUS_SENSE, Pin.IN).value() == 1
+
+
+# NeoPixel rainbow colour wheel
+def rgb_color_wheel(wheel_pos):
+    """Color wheel to allow for cycling through the rainbow of RGB colors."""
+    wheel_pos = wheel_pos % 255
+
+    if wheel_pos < 85:
+        return 255 - wheel_pos * 3, 0, wheel_pos * 3
+    elif wheel_pos < 170:
+        wheel_pos -= 85
+        return 0, wheel_pos * 3, 255 - wheel_pos * 3
+    else:
+        wheel_pos -= 170
+        return wheel_pos * 3, 255 - wheel_pos * 3, 0
+
+
+# Go into deep sleep but shut down the RGB LED first to save power
+# Use this if you want lowest deep sleep current
+def go_deepsleep(t):
+    """Deep sleep helper that also powers down the on-board NeoPixel."""
+    set_pixel_power(False)
+    set_pixel_matrix_power(False)
+    machine.deepsleep(t)

ports/esp32/boards/UM_FEATHERS2NEO/mpconfigboard.cmake

@@ -0,0 +1,8 @@
+set(IDF_TARGET esp32s2)
+set(SDKCONFIG_DEFAULTS
+    boards/sdkconfig.base
+    boards/sdkconfig.spiram_sx
+    boards/sdkconfig.usb
+)
+
+set(MICROPY_FROZEN_MANIFEST ${MICROPY_BOARD_DIR}/manifest.py)

ports/esp32/boards/UM_FEATHERS2NEO/mpconfigboard.h

@@ -0,0 +1,12 @@
+#define MICROPY_HW_BOARD_NAME "FeatherS2 Neo"
+#define MICROPY_HW_MCU_NAME "ESP32-S2FN4R2"
+
+#define MICROPY_PY_BLUETOOTH                (0)
+#define MICROPY_HW_ENABLE_SDCARD            (0)
+
+#define MICROPY_HW_I2C0_SCL (9)
+#define MICROPY_HW_I2C0_SDA (8)
+
+#define MICROPY_HW_SPI1_MOSI (35)  // SDO
+#define MICROPY_HW_SPI1_MISO (37)  // SDI
+#define MICROPY_HW_SPI1_SCK (36)

ports/esp32/boards/UM_FEATHERS2NEO/sdkconfig.board

@@ -0,0 +1,8 @@
+CONFIG_FLASHMODE_QIO=y
+CONFIG_ESPTOOLPY_FLASHFREQ_80M=y
+CONFIG_USB_AND_UART=y
+CONFIG_ESPTOOLPY_AFTER_NORESET=y
+
+# LWIP
+CONFIG_LWIP_LOCAL_HOSTNAME="UMFeatherS2Neo"
+# end of LWIP

tools/autobuild/build-esp32-latest.sh

@@ -49,4 +49,5 @@ else
     do_build esp32c3 GENERIC_C3
     do_build tinys2 UM_TINYS2
     do_build featherS2 UM_FEATHERS2
+    do_build featherS2neo UM_FEATHERS2NEO
 fi