Editing DAC (section)

== Dac Outputting Overview ==
 - Setup handled by DAC_init()
 - Tim3 will hold a given frequency, it has an approximately 0.5second period. This is how long the high freq is held for the one bit.
 - Once Tim3 finishes, it will call a handler that checks if done, or sets Tim6 ARR depending on the next bit
 - Tim6 will at halfway through set the dac's output to 1, and at the end set the dac's output to 0. This has a frequency on the order of 1.2kHz, or 2.4kHz. This will transmit the frequency for the duration of Tim3's output

 - From packet_framer() we write the DataBlock_s->length and ->data fields, then call DAC_init()