enable neopixel and i2c on feather by default

Author: ladyada

Diff for: variants/adafruit_feather_esp32s2/pins_arduino.h

@@ -25,6 +25,7 @@
 #define NEOPIXEL_NUM        1     // number of neopixels
 #define NEOPIXEL_POWER      21    // power pin
 #define NEOPIXEL_POWER_ON   HIGH  // power pin state when on
+#define PIN_I2C_POWER       7     // Ppwer pin for I2C
 
 static const uint8_t SDA = 3;
 static const uint8_t SCL = 4;

Diff for: variants/adafruit_feather_esp32s2/variant.cpp

@@ -31,7 +31,15 @@ extern "C" {
 // Initialize variant/board, called before setup()
 void initVariant(void)
 {
+  // This board has a power control pin, and we must set it to output and high
+  // in order to enable the NeoPixels.
+  pinMode(NEOPIXEL_POWER, OUTPUT);
+  digitalWrite(NEOPIXEL_POWER, HIGH);
 
+  // This board has a power control pin, and we must set it to output and low
+  // in order to enable the I2C port.
+  pinMode(PIN_I2C_POWER, OUTPUT);
+  digitalWrite(PIN_I2C_POWER, LOW);
 }
 
 }