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Added i2c slave support
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Keep things simple.
Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
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a byte and then read.
Slight tidy up.
Reformatted CREDITS file to be in correct order.
Added a note about buffer overrun
Signed-off-by:- Barry Carter <barry.carter@gmail.com>
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Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
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examples
Signed-off-by: Aditya Gaddam <adityagaddam@gmail.com>"
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function. While the second shows the use of a static class method as the event handler. Both work on Maple REVC
Signed-off-by: Aditya Gaddam <adityagaddam@gmail.com>"
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I'm currently measuring over 500 KB/sec with screen as my serial
monitor. If I don't display the output at all, I get over 600
KB/sec. Nice!
Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
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Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
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Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
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Too ugly? Meh.
Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
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This is straightforward. Do it in a verbose style with lots of
comments, so we can use this patch as an example for how to port
existing DMA code.
Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
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Touch up comments, change some function names, and don't set something
to zero which already is.
Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
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Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
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Someone pointed to this example on the DMA page in the wiki, so it's
probably worth making it more clear what's going on. Remove unused
code, add comments, and move things around for better exposition.
Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
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Stupidly, spi_gpio_cfg() didn't take a spi_dev* argument on F1,
because it doesn't matter there. On F2, where we need to set an
alternate function when configuring GPIOs for SPI, we need to know the
dev.
We can't add break backwards compatibility, so we need a new
function. However, we've since added a bunch of foo_gpio_cfg()
routines, and we don't want confusing asymmetry in the names. So a
global style change is needed. (Fortunately, the new functions weren't
part of a release, so it's no problem to change their names).
Change all foo_gpio_cfg() routines to foo_config_gpios() (or
foo_config_gpio(), if there's only one GPIO to configure). For
backwards compatibility, make spi_gpio_cfg() on F1 an __always_inline
call to spi_config_gpios().
Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
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Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
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Serial1 writes back what it receives.
Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
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Fix @file in many places. Also fix up the descriptions where it's
appropriate. This standardizes the @file formatting across the library
to explicitly include any parent directories up to the repository
root.
Besides being nice, this will hopefully let us manage Doxygen's XML
output so as to make extracting series-specific pieces via Breathe in
the leaflabs-docs repo possible.
Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
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Currently passing on STM32F2.
Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
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Move libmaple/*.h to (new) libmaple/include/libmaple/. The new
accepted way to include a libmaple header foo.h is with:
#include <libmaple/foo.h>
This is more polite in terms of the include namespace. It also allows
us to e.g. implement the Arduino SPI library at all (which has header
SPI.h; providing it was previously impossible on case-insensitive
filesystems due to libmaple's spi.h).
Similarly for Wirish.
The old include style (#include "header.h") is now deprecated.
libmaple/*.h:
- Change include guard #defines from _FOO_H_ to _LIBMAPLE_FOO_H_.
- Add license headers where they're missing
- Add conditional extern "C" { ... } blocks where they're missing
(they aren't always necessary, but we might was well do it against
the future, while we're at it.).
- Change includes from #include "foo.h" to #include <libmaple/foo.h>.
- Move includes after extern "C".
- Remove extra trailing newlines
Note that this doesn't include the headers under libmaple/usb/ or
libmaple/usb/usb_lib. These will get fixed later.
libmaple/*.c:
- Change includes from #include "foo.h" to #include <libmaple/foo.h>.
Makefile:
- Add I$(LIBMAPLE_PATH)/include/libmaple to GLOBAL_FLAGS. This allows
for users (including Wirish) to migrate their code, but should go
away ASAP, since it slows down compilation.
Wirish:
- Move wirish/**/*.h to (new) wirish/include/wirish/. This ignores
the USB headers, which, as usual, are getting handled after
everything else.
- Similarly generify wirish/boards/ structure. For each supported
board "foo", move wirish/boards/foo.h and wirish/boards/foo.cpp to
wirish/boards/foo/include/board/board.h and
wirish/boards/foo/board.cpp, respectively. Also remove the #ifdef
hacks around the .cpp files.
- wirish/rules.mk: put wirish/boards/foo/include in the include path
(and add wirish/boards/foo/board.cpp to the list of sources to be
compiled). This allows saying:
#include <board/board.h>
instead of the hack currently in place. We can allow the user to
override this setting later to make adding custom board definitions
easier.
- Disable -Werror in libmaple/rules.mk, as the current USB warnings
don't let the olimex_stm32_h103 board compile. We can re-enable
-Werror once we've moved the board-specific bits out of libmaple
proper.
libraries, examples:
- Update includes accordingly.
- Miscellaneous cosmetic fixups.
Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
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This messes with timing a little, but makes it faster to test. The
timing was never perfect anyway, due to incrementing count.
Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
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This replaces the previously undocumented 'd' option, which tested the
pin mode INPUT_PULLDOWN.
Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
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Actually read a character each time we ask for one. Put pin 22 back
into OUTPUT mode when we're done.
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SerialUSB.read() is already blocking, so no sense looping on available().
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Measure pins one at a time.
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Each call to measure_adc_noise() now does
N_ADC_NOISE_MEASUREMENTS (currently 40) samples, instead of just 1.
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Update measure_adc_noise() to actually use the Welford online
algorithm, instead of accumulating data in an array on the stack.
This allows us to increase the number of samples (to 1000).
Revised algorithm tested on host PC and compared (in Python) against
numpy with a list of 100 values in [0, 1) drawn using random.random().
Results (Python):
>>> r = [random.random() for i in xrange(100)]
>>> numpy.mean(r)
0.50073064742634854
>>> numpy.var(r)
0.083726090293309297
Results (C++, x86 host PC):
n: 100 mean: 0.500731 variance: 0.084572
So this algorithm for variance has some inaccuracies, but it appears
to be good to a couple of significant figures.
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Print input as if it were an ASCII character, not a number.
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Nonportable (Maple Mini only) test of external interrupt
functionality. When wired properly, this triggers various EXTI lines
simultaneously, keeping track of the number of times each handler is
invoked.
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Don't modify the core FreeRTOS code; only change source that's
specific to libmaple.
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example blinky.
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Changes make sure that base arithmetic applies correctly for various
integral types, and that floating point numbers can be printed at
various precisions.
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Go through overlong source code lines and convert as many of them as
appropriate to be 80-column clean. This mostly affects license
headers. Overlong lines are determined by running following from the
libmaple base directory:
$ ack-grep --nocolor --nogroup --cpp --cc --ignore-dir=usb -- '.{80}'
Note that this excludes libmaple's usb subdirectory, which is still
full of ST code that doesn't follow the libmaple source code
guidelines.
Contents of ~/.ackrc (these won't matter, but are included for
completeness):
--ignore-dir=docs
--ignore-dir=build
--type-set
ld=.ld
--type-set
rst=.rst
--type-set
txt=.txt
--type-set
mk=.mk
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Committing the results of running the following on the libmaple root
directory:
$ fromdos `grep --exclude-dir='[.]git' -Ilsr $'\r$' .`
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