SM6FBQ / HackRF clone - History

h1r9: fix usb_vendor_request_reset()

The bootloader is configured by pin straps on certain pins. We use some
of those for other purposes in r9 which causes the bootloader to
misbehave if the device is reset from software. By switching these pins
from outputs to inputs just before reset this problem is avoided.

h1r9: workaround platform detection problem

On the first spin of r9 one of the pins used for platform detection is
pulled up to VAA, not VCC, and VAA hasn't been switched on yet at the
time of platform detection. This results in r9 being misidentified as OG
from time to time.

As a temporary workaround until the next board spin, change the platform
from OG to r9 if it is detected as OG but has r9 pin straps.

h1r9: configure MAX2839 HPF

Without this, the RX baseband gain amplifies a DC offset.

h1r9: don't write to outputs in TIMER3 ext. match register

Writing to the output bits in the TIMER3 external match register
resulted in intermittent failures that varied in likelihood from board
to board and from commit to commit for no apparent reason.