This program activates the MAX2837 transceiver to transmit an unmodulated
carrier.
Required Lemondrop -> Jellybean connections:
SCK: Lemondrop P3 pin 2 -> Jellybean P9 2
CS_XCVR: Lemondrop P3 pin 3 -> Jellybean P9 3
MOSI: Lemondrop P3 pin 4 -> Jellybean P9 4
CS_AD: Lemondrop P3 pin 5 -> Jellybean P9 5
MISO: Lemondrop P3 pin 6 -> Jellybean P9 6
ENABLE: Lemondrop P6 pin 12 -> Jellybean P7 pin 12
RXENABLE: Lemondrop P6 pin 13 -> Jellybean P7 pin 13
TXENABLE: Lemondrop P6 pin 15 -> Jellybean P7 pin 15
SCL: Lemondrop P7 pin 3 -> Jellybean P6 pin 3
SDA: Lemondrop P7 pin 5 -> Jellybean P6 pin 5
SDA: Lemondrop P7 pin 6 -> Jellybean P6 pin 6
VCC: Lemondrop P4 pin 2, 4, or 6 -> Jellybean P17 pin 2, 4, or 6
GND: Lemondrop P5 -> Jellybean P13
For now we are running everything at 3.3 V, but in the future we may also
require:
1V8: Lemondrop P11 pin 2, 4, or 6 -> Jellybean P16 pin 2, 4, or 6