-// Pin Arduino
-// 0 B16 RXD
-// 1 B17 TXD
-// 2 D0
-// 3 A12 FTM1_CH0
-// 4 A13 FTM1_CH1
-// 5 D7 FTM0_CH7 OC0B/T1
-// 6 D4 FTM0_CH4 OC0A
-// 7 D2
-// 8 D3 ICP1
-// 9 C3 FTM0_CH2 OC1A
-// 10 C4 FTM0_CH3 SS/OC1B
-// 11 C6 MOSI/OC2A
-// 12 C7 MISO
-// 13 C5 SCK
-// 14 D1
-// 15 C0
-// 16 B0 (FTM1_CH0)
-// 17 B1 (FTM1_CH1)
-// 18 B3 SDA
-// 19 B2 SCL
-// 20 D5 FTM0_CH5
-// 21 D6 FTM0_CH6
-// 22 C1 FTM0_CH0
-// 23 C2 FTM0_CH1
-// 24 A5 (FTM0_CH2)
-// 25 B19
-// 26 E1
-// 27 C9
-// 28 C8
-// 29 C10
-// 30 C11
-// 31 E0
-// 32 B18
-// 33 A4 (FTM0_CH1)
-// (34) analog only
-// (35) analog only
-// (36) analog only
-// (37) analog only
+// Pin Name Function Hardware
+// ----------------------------------
+// 0 B16 RX1
+// 1 B17 TX1
+// 2 D0
+// 3 A12 FTM1_CH0 PWM (CAN TX - Teensy 3.1)
+// 4 A13 FTM1_CH1 PWM (CAN RX - Teensy 3.1)
+// 5 D7 FTM0_CH7 PWM
+// 6 D4 FTM0_CH4 PWM
+// 7 D2 RX3
+// 8 D3 TX3
+// 9 C3 FTM0_CH2 RX2 PWM
+// 10 C4 FTM0_CH3 TX2 PWM CS
+// 11 C6 DOUT
+// 12 C7 DIN
+// 13 C5 LED SCK
+// 14 D1
+// 15 C0
+// 16 B0 (FTM1_CH0)
+// 17 B1 (FTM1_CH1)
+// 18 B3 SDA0
+// 19 B2 SCL0
+// 20 D5 FTM0_CH5 PWM
+// 21 D6 FTM0_CH6 PWM
+// 22 C1 FTM0_CH0 PWM
+// 23 C2 FTM0_CH1 PWM
+// 24 A5 (FTM0_CH2)
+// 25 B19 (PWM - Teensy 3.1)
+// 26 E1
+// 27 C9
+// 28 C8
+// 29 C10 (SCL1 - Teensy 3.1)
+// 30 C11 (SDA1 - Teensy 3.1)
+// 31 E0
+// 32 B18 (PWM - Teensy 3.1)
+// 33 A4 (FTM0_CH1)
+// 34 analog only
+// 35 analog only
+// 36 analog only
+// 37 analog only
+// 38 Temp Sensor
+// 39 Vref
+// 40 DAC/A14
// not available to user:
-// A0 FTM0_CH5 SWD Clock
-// A1 FTM0_CH6 USB ID
-// A2 FTM0_CH7 SWD Trace
-// A3 FTM0_CH0 SWD Data
+// A0 FTM0_CH5 SWD Clock
+// A1 FTM0_CH6 USB ID
+// A2 FTM0_CH7 SWD Trace
+// A3 FTM0_CH0 SWD Data
+
+// Analog
+// Pin Pin Name
+// -----------------
+// A0 14 D1
+// A1 15 C0
+// A2 16 B0
+// A3 17 B1
+// A4 18 B3
+// A5 19 B2
+// A6 20 D5
+// A7 21 D6
+// A8 22 C1
+// A9 23 C2
+// A10
+// A11
+// A12
+// A13
+// A14 DAC (Teensy 3.1 Only)
+// A15 26 E1
+// A16 27 C9
+// A17 28 C8
+// A18 29 C10
+// A19 30 C11
+// A20 31 E0
+