This removes the definition of the offset variable,
volatile uint32_t usb_bulk_buffer_offset = 0;
which is actually superfluous. This variable, along with its neighbour
usb_bulk_buffer_tx, is placed explicitly by the linker script. Its type
is defined by the declaration in usb_bulk_buffer.h.
There is no need to define it here, and doing so gives the misleading
impression that its initial value can be changed by modifying this line!
The initialization to zero never actually takes effect, because the
variable is not placed in the .data or .bss sections which are
initialised by the startup code.
The offset and tx variables are both set in set_transceiver_mode
before SGPIO streaming is started, so the M0 code does not use
them uninitialised.
When switching to frequency mode or modifying the frequency ranges,
ensure that the Opera Cake is switched to the correct port on the very
next tuning.
This uses `add_custom_command` to run a cmake script instead of using
`configure_file` directly, which allows for adding dependencies and
creates an ouput that can be depended on.
It also uses `add_custom_command` instead of `add_custom_target` to
create the M0 binary, since custom targets have no output file to depend
on.
Unfortunately, multiple targets cannot depend on the same generated file
or cmake tries to run the generation multiple times in parallel. So, the
.bin/.s generation is now duplicated for each target so they don't
conflict.
fixes#693
This changes m0_rom_to_ram to read directly from the ROM region, rather
than copying from where .text has been copied to RAM.
Previously the second .text section would be merged with the first one,
so the M0 image would be copied to RAM during `pre_main`. However, on
newer linkers the sections are not merged together so the second .text
section did not get copied to RAM.
fixes#936
Previously, a USB vendor request could interrupt in the middle of
set_freq and make conflicting changes, leaving the HackRF in an
undefined state.
fixes#772
Previously the firmware would re-initialise the bulk endpoints on
every transceiver mode change including a USB data toggle reset,
which could cause the first bulk packet (512-bytes) to be dropped
by the host if the PID no longer matched.
For RX, this replaces received samples with an 8-bit incrementing counter.
This allows for identification of any dropped or repeated samples across the
SGPIO interface.
For TX, this compares transmitted samples against another 8-bit incrementing
counter, and raises pin B2AUX1 if they don't match. This should be used with
a tool on the host-side that transmits a matching counter.