I am not getting output on mic nor on iPhone's oscilloscope app

[GoogleCodeExporter]

What steps will reproduce the problem?
1. flashed the firmware on hijack device.
2. opened the oscilloscope application on iPhone with full volume
3. Gave uart data input (0-3.3v) to A6 pin of hijack device.

As expected i should get fsk output on mic which i am not getting, neither i am 
getting any waveform on oscilloscope app.

i have checked waveform's on external oscilloscope, which resulted to a 
constant 0.8v dc voltage on mic with or without data given to the input. These 
are the measurements obtained
Vcc = 2.73v, Right = 0.8v (22khz), Mic=0.8v

I have even checked the GPIO pin (P1.7) where i am getting squarewave's after 
inputting the data.

Can u please suggest some pointers, so as to know where i am going wrong.

Original issue reported on code.google.com by [email protected] on 11 Jul 2013 at 1:20