hardware.h

#ifndef _BV
#define _BV(bit) (1 << (bit)) 
#endif

#define DOTSTAR_MATRIX_64x8 0
#define NEOPIXEL_MATRIX_2x_32x8 1
#define EL_WIRE_8 2
#define DOTSTAR_STRIP_120 3

//Pins for Teensy 3.2 w/ Audio board
// TODO: document more pins. audio: 9, 11, 13, 18, 19, 22, 23. 
#define SERIAL_1_RX 0
#define SERIAL_1_TX 1
#define FLOATING_PIN 3  // any floating pin. used to seed random
// Serial 3 is RX=7, TX=8 which conflicts with anything on SPI
#define SPI_MOSI_PIN 7  // alt pin for use with audio board
// Serial 2 is RX=9, TX=10 which conflicts with the SD card
#define SDCARD_CS_PIN 10
#define SPI_MISO_PIN 12
#define RED_LED 13  // this is also used by the audio board's sgtl5000 RX line
#define SPI_SCK_PIN 14  // alt pin for use with audio board
#define VOLUME_KNOB 15  // A1

#ifdef INPUT_TOUCH
  // IRQ is pulled up to 3.3V on the breakout
  // when the sensor chip detects a change in the touch sense switches, the pin goes to 0V until the data is read over i2c
  #define MPR121_IRQ 16 // TODO: is this a good pin for this?
#endif

// these can be shared between multiple i2c devices
#define SDA 18
#define SDC 19

#define FREQUENCY_RESOLUTION_HZ 43

#ifdef INPUT_TOUCH
  // Default address is 0x5A, if tied to 3.3V its 0x5B
  // If tied to SDA its 0x5C and if SCL then 0x5D
  #define MPR121_ADDRESS 0x5A

  // TODO: not all the models have touches
  // TODO: support more than one hat design
  enum touches {
    brim_front = 0,
    top = 2,
    brim_left = 4,
    brim_right = 6,
  };
#endif