cmake: Extend cflags and add Debug build type to be debuggable with gdb

st-probe: Fix segfault when programmer is already busy

travis: Initial continues integration build on linux and osx

cmake: Add -ggdb flag when CMAKE_BUILD_TYPE=Debug, add more usefull and stricter compiler flags when supported

* Fixup README to render HTML from Markdown
* Fixup CMakeLists.txt to have a lower working minimum version
* Add .travis.yml and .travis.sh for autobuild

st-probe: Initial working stlink_probe_* API and CLI tool

Trace the read data in stlink_read_debug32 and not the address of the…

Proper writing of page 0 of second bank for stm32l476xe.

avoid reading from NULL

Cleanups

Signed-off-by: Maxime Coquelin <mcoquelin.stm32@gmail.com>

The stm32l4 loader expects a count of 32 bits words while its granularity is
really 64 bits.

This patch fixes this to simplify count calculation in run_flash_loader().

Signed-off-by: Maxime Coquelin <mcoquelin.stm32@gmail.com>

All the loaders returns remaining work count in r2, except stm32l0/1.
Make these loaders behaving as the others to simplify run_flash_loader() code.

Signed-off-by: Maxime Coquelin <mcoquelin.stm32@gmail.com>

This patch invert source and destination registers in the stm32l0 and stm32l1
loaders, so that it follows the same ABI as other stm32 loaders.

Doing that, the run_flash_loader() function can be simplified a little.

Signed-off-by: Maxime Coquelin <mcoquelin.stm32@gmail.com>

This patch simplifies run_flash_loader() function in preparation for error
propagation from backends.

Doing this, we have less call sites for stlink API.

Signed-off-by: Maxime Coquelin <mcoquelin.stm32@gmail.com>

Having a type of flash information has some advantages:
 - Make the code easier to read
 - Make adding family derivatives easier (only add a new entry in header file)
 - Make the backends error propagation easier to implement (less places to fix)

Signed-off-by: Maxime Coquelin <mcoquelin.stm32@gmail.com>

Now that libusb errors are propagated up to stlink API, we can handle these
errors.

Signed-off-by: Maxime Coquelin <mcoquelin.stm32@gmail.com>

Signed-off-by: Maxime Coquelin <mcoquelin.stm32@gmail.com>

As the libusb returns errors, make the backends propagates them so that
callers can decide to continue or stop task execution.

Signed-off-by: Maxime Coquelin <mcoquelin.stm32@gmail.com>

_stlink_usb_target_voltage already returns an error value.
If value return is positive, this is a voltage, if negative this is an error.
Check the return on callers side to inform there is an error in reading the
voltage, instead of notifying of a too low voltage.

Signed-off-by: Maxime Coquelin <mcoquelin.stm32@gmail.com>

This rework is done in order to prepare for propagating errors returned by
libusb.

Signed-off-by: Maxime Coquelin <mcoquelin.stm32@gmail.com>

This rework is done in order to prepare for propagating errors returned by
libusb.

Signed-off-by: Maxime Coquelin <mcoquelin.stm32@gmail.com>

Add st-info to CMakeLists.txt

be quicker about determining erased byte pattern when flashing

make st-flash clean up on sigint/term/segv, make gdb-server clean up on sigsegv.