increase iterations to get good results from LM
better check for convergence, comparison with initial fitness is a better way to determine if convergence occurs, if fitness has not improved compared to initial fitness it means optimiser has failed.
Like was done to inertial AK8963 and inertial sensor move the decision
regarding the I2C bus to the caller. We don't allow changing the address
because apparently HMC5843 doesn't support different addresses.
Changing only the bus could be more easily done but this prepares the
ground for using HMC5843 on an AuxiliarBus.
The need for a more generic abstraction is evidenced by this commit: a
"SerialBus" in AP_HAL would be a nice addition rather than letting each
driver to provide its own. However the methods are a little bit
different from what we have in AK8963. It's safer to do the simple
conversion now and later on to add the abstraction changing everybody to
use it.
read() calls accumulate() which takes the lock by itself so we must
release it like we were doing before 669ae26 ("AP_Compass: encapsulated
calibration in HMC").
Just like was done for inertial sensor, different detect() functions
might need different arguments and passing a pointer to function here is
cumbersome. For example, it forces to have a method like "detect_i2c2"
rather than allowing hal.i2c2 to be passed as parameter.
This commit changes the way libraries headers are included in source files:
- If the header is in the same directory the source belongs to, so the
notation '#include ""' is used with the path relative to the directory
containing the source.
- If the header is outside the directory containing the source, then we use
the notation '#include <>' with the path relative to libraries folder.
Some of the advantages of such approach:
- Only one search path for libraries headers.
- OSs like Windows may have a better lookup time.
In case of error or zeroed data, the i2c semaphore wasn't given.
It happened at first startup on Bebop and caused a failure:
"PANIC: failed to take _bus->sem 100 times in a row..."
