Revision 0:41db3ed6754d, committed 2016-03-12

Comitter:

jpbarraca

Date:

Sat Mar 12 00:18:53 2016 +0000

Commit message:

v0.1.2.1

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/LICENSE.txt	Sat Mar 12 00:18:53 2016 +0000
@@ -0,0 +1,339 @@
+GNU GENERAL PUBLIC LICENSE
+                       Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc., <http://fsf.org/>
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
+  The licenses for most software are designed to take away your
+freedom to share and change it.  By contrast, the GNU General Public
+License is intended to guarantee your freedom to share and change free
+software--to make sure the software is free for all its users.  This
+General Public License applies to most of the Free Software
+Foundation's software and to any other program whose authors commit to
+using it.  (Some other Free Software Foundation software is covered by
+the GNU Lesser General Public License instead.)  You can apply it to
+your programs, too.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+this service if you wish), that you receive source code or can get it
+if you want it, that you can change the software or use pieces of it
+in new free programs; and that you know you can do these things.
+
+  To protect your rights, we need to make restrictions that forbid
+anyone to deny you these rights or to ask you to surrender the rights.
+These restrictions translate to certain responsibilities for you if you
+distribute copies of the software, or if you modify it.
+
+  For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must give the recipients all the rights that
+you have.  You must make sure that they, too, receive or can get the
+source code.  And you must show them these terms so they know their
+rights.
+
+  We protect your rights with two steps: (1) copyright the software, and
+(2) offer you this license which gives you legal permission to copy,
+distribute and/or modify the software.
+
+  Also, for each author's protection and ours, we want to make certain
+that everyone understands that there is no warranty for this free
+software.  If the software is modified by someone else and passed on, we
+want its recipients to know that what they have is not the original, so
+that any problems introduced by others will not reflect on the original
+authors' reputations.
+
+  Finally, any free program is threatened constantly by software
+patents.  We wish to avoid the danger that redistributors of a free
+program will individually obtain patent licenses, in effect making the
+program proprietary.  To prevent this, we have made it clear that any
+patent must be licensed for everyone's free use or not licensed at all.
+
+  The precise terms and conditions for copying, distribution and
+modification follow.
+
+                    GNU GENERAL PUBLIC LICENSE
+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+  0. This License applies to any program or other work which contains
+a notice placed by the copyright holder saying it may be distributed
+under the terms of this General Public License.  The "Program", below,
+refers to any such program or work, and a "work based on the Program"
+means either the Program or any derivative work under copyright law:
+that is to say, a work containing the Program or a portion of it,
+either verbatim or with modifications and/or translated into another
+language.  (Hereinafter, translation is included without limitation in
+the term "modification".)  Each licensee is addressed as "you".
+
+Activities other than copying, distribution and modification are not
+covered by this License; they are outside its scope.  The act of
+running the Program is not restricted, and the output from the Program
+is covered only if its contents constitute a work based on the
+Program (independent of having been made by running the Program).
+Whether that is true depends on what the Program does.
+
+  1. You may copy and distribute verbatim copies of the Program's
+source code as you receive it, in any medium, provided that you
+conspicuously and appropriately publish on each copy an appropriate
+copyright notice and disclaimer of warranty; keep intact all the
+notices that refer to this License and to the absence of any warranty;
+and give any other recipients of the Program a copy of this License
+along with the Program.
+
+You may charge a fee for the physical act of transferring a copy, and
+you may at your option offer warranty protection in exchange for a fee.
+
+  2. You may modify your copy or copies of the Program or any portion
+of it, thus forming a work based on the Program, and copy and
+distribute such modifications or work under the terms of Section 1
+above, provided that you also meet all of these conditions:
+
+    a) You must cause the modified files to carry prominent notices
+    stating that you changed the files and the date of any change.
+
+    b) You must cause any work that you distribute or publish, that in
+    whole or in part contains or is derived from the Program or any
+    part thereof, to be licensed as a whole at no charge to all third
+    parties under the terms of this License.
+
+    c) If the modified program normally reads commands interactively
+    when run, you must cause it, when started running for such
+    interactive use in the most ordinary way, to print or display an
+    announcement including an appropriate copyright notice and a
+    notice that there is no warranty (or else, saying that you provide
+    a warranty) and that users may redistribute the program under
+    these conditions, and telling the user how to view a copy of this
+    License.  (Exception: if the Program itself is interactive but
+    does not normally print such an announcement, your work based on
+    the Program is not required to print an announcement.)
+
+These requirements apply to the modified work as a whole.  If
+identifiable sections of that work are not derived from the Program,
+and can be reasonably considered independent and separate works in
+themselves, then this License, and its terms, do not apply to those
+sections when you distribute them as separate works.  But when you
+distribute the same sections as part of a whole which is a work based
+on the Program, the distribution of the whole must be on the terms of
+this License, whose permissions for other licensees extend to the
+entire whole, and thus to each and every part regardless of who wrote it.
+
+Thus, it is not the intent of this section to claim rights or contest
+your rights to work written entirely by you; rather, the intent is to
+exercise the right to control the distribution of derivative or
+collective works based on the Program.
+
+In addition, mere aggregation of another work not based on the Program
+with the Program (or with a work based on the Program) on a volume of
+a storage or distribution medium does not bring the other work under
+the scope of this License.
+
+  3. You may copy and distribute the Program (or a work based on it,
+under Section 2) in object code or executable form under the terms of
+Sections 1 and 2 above provided that you also do one of the following:
+
+    a) Accompany it with the complete corresponding machine-readable
+    source code, which must be distributed under the terms of Sections
+    1 and 2 above on a medium customarily used for software interchange; or,
+
+    b) Accompany it with a written offer, valid for at least three
+    years, to give any third party, for a charge no more than your
+    cost of physically performing source distribution, a complete
+    machine-readable copy of the corresponding source code, to be
+    distributed under the terms of Sections 1 and 2 above on a medium
+    customarily used for software interchange; or,
+
+    c) Accompany it with the information you received as to the offer
+    to distribute corresponding source code.  (This alternative is
+    allowed only for noncommercial distribution and only if you
+    received the program in object code or executable form with such
+    an offer, in accord with Subsection b above.)
+
+The source code for a work means the preferred form of the work for
+making modifications to it.  For an executable work, complete source
+code means all the source code for all modules it contains, plus any
+associated interface definition files, plus the scripts used to
+control compilation and installation of the executable.  However, as a
+special exception, the source code distributed need not include
+anything that is normally distributed (in either source or binary
+form) with the major components (compiler, kernel, and so on) of the
+operating system on which the executable runs, unless that component
+itself accompanies the executable.
+
+If distribution of executable or object code is made by offering
+access to copy from a designated place, then offering equivalent
+access to copy the source code from the same place counts as
+distribution of the source code, even though third parties are not
+compelled to copy the source along with the object code.
+
+  4. You may not copy, modify, sublicense, or distribute the Program
+except as expressly provided under this License.  Any attempt
+otherwise to copy, modify, sublicense or distribute the Program is
+void, and will automatically terminate your rights under this License.
+However, parties who have received copies, or rights, from you under
+this License will not have their licenses terminated so long as such
+parties remain in full compliance.
+
+  5. You are not required to accept this License, since you have not
+signed it.  However, nothing else grants you permission to modify or
+distribute the Program or its derivative works.  These actions are
+prohibited by law if you do not accept this License.  Therefore, by
+modifying or distributing the Program (or any work based on the
+Program), you indicate your acceptance of this License to do so, and
+all its terms and conditions for copying, distributing or modifying
+the Program or works based on it.
+
+  6. Each time you redistribute the Program (or any work based on the
+Program), the recipient automatically receives a license from the
+original licensor to copy, distribute or modify the Program subject to
+these terms and conditions.  You may not impose any further
+restrictions on the recipients' exercise of the rights granted herein.
+You are not responsible for enforcing compliance by third parties to
+this License.
+
+  7. If, as a consequence of a court judgment or allegation of patent
+infringement or for any other reason (not limited to patent issues),
+conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License.  If you cannot
+distribute so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you
+may not distribute the Program at all.  For example, if a patent
+license would not permit royalty-free redistribution of the Program by
+all those who receive copies directly or indirectly through you, then
+the only way you could satisfy both it and this License would be to
+refrain entirely from distribution of the Program.
+
+If any portion of this section is held invalid or unenforceable under
+any particular circumstance, the balance of the section is intended to
+apply and the section as a whole is intended to apply in other
+circumstances.
+
+It is not the purpose of this section to induce you to infringe any
+patents or other property right claims or to contest validity of any
+such claims; this section has the sole purpose of protecting the
+integrity of the free software distribution system, which is
+implemented by public license practices.  Many people have made
+generous contributions to the wide range of software distributed
+through that system in reliance on consistent application of that
+system; it is up to the author/donor to decide if he or she is willing
+to distribute software through any other system and a licensee cannot
+impose that choice.
+
+This section is intended to make thoroughly clear what is believed to
+be a consequence of the rest of this License.
+
+  8. If the distribution and/or use of the Program is restricted in
+certain countries either by patents or by copyrighted interfaces, the
+original copyright holder who places the Program under this License
+may add an explicit geographical distribution limitation excluding
+those countries, so that distribution is permitted only in or among
+countries not thus excluded.  In such case, this License incorporates
+the limitation as if written in the body of this License.
+
+  9. The Free Software Foundation may publish revised and/or new versions
+of the General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+Each version is given a distinguishing version number.  If the Program
+specifies a version number of this License which applies to it and "any
+later version", you have the option of following the terms and conditions
+either of that version or of any later version published by the Free
+Software Foundation.  If the Program does not specify a version number of
+this License, you may choose any version ever published by the Free Software
+Foundation.
+
+  10. If you wish to incorporate parts of the Program into other free
+programs whose distribution conditions are different, write to the author
+to ask for permission.  For software which is copyrighted by the Free
+Software Foundation, write to the Free Software Foundation; we sometimes
+make exceptions for this.  Our decision will be guided by the two goals
+of preserving the free status of all derivatives of our free software and
+of promoting the sharing and reuse of software generally.
+
+                            NO WARRANTY
+
+  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
+FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
+OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
+PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
+OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS
+TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE
+PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
+REPAIR OR CORRECTION.
+
+  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
+REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
+INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
+OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
+TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
+YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
+PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGES.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    {description}
+    Copyright (C) {year}  {fullname}
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License along
+    with this program; if not, write to the Free Software Foundation, Inc.,
+    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program is interactive, make it output a short notice like this
+when it starts in an interactive mode:
+
+    Gnomovision version 69, Copyright (C) year name of author
+    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, the commands you use may
+be called something other than `show w' and `show c'; they could even be
+mouse-clicks or menu items--whatever suits your program.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary.  Here is a sample; alter the names:
+
+  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
+  `Gnomovision' (which makes passes at compilers) written by James Hacker.
+
+  {signature of Ty Coon}, 1 April 1989
+  Ty Coon, President of Vice
+
+This General Public License does not permit incorporating your program into
+proprietary programs.  If your program is a subroutine library, you may
+consider it more useful to permit linking proprietary applications with the
+library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/README.md	Sat Mar 12 00:18:53 2016 +0000
@@ -0,0 +1,37 @@
+# LogicAlNucleo
+
+A SUMP compatible Logical Analyser for the NucleoF401RE (STM32F4xx) almost up to 10MSPS, 8Ch, 32K samples memory.
+
+This will turn any NucleoF401RE (will work with other boards but it was not tested) system into a Logical Analyser compatible with a subset of the SUMP protocol. It can be used with clients such as [PulseView](http://sigrok.org/wiki/PulseView), [sigrok-cli](http://sigrok.org/wiki/Sigrok-cli), and [LogicSniffer](http://www.lxtreme.nl/ols/). While it is not as feature complete as other products, such as the [OLS](http://dangerousprototypes.com/docs/Open_Bench_Logic_Sniffer), it can turn that STM32 board that is lying around into a no frills, bare to the bones, logic analyser.
+
+Sampling rate up to 500KSPS should work on most platforms. Higher than that, only the F401RE, or other similar >84Mhz platform should provide results with accurate timing measurements up to 5MSPS. 10MSPS will be accepted but do not trust timing information as the board cannot really keep up with this speed. However this sampling rate can still be usefull. If you wish to add support for other platforms, please focus in creating the appropriate unrolled loops callibrated with an osciloscope.
+
+PORTB is current used, and Pins PB_0 to PB_7 are reported. Unfortunately these pins are scattered over the board and are not contiguous. Check [this](http://developer.mbed.org/platforms/ST-Nucleo-F401RE/) diagram to find them.
+
+This implementation was based in the [mbed](https://mbed.org/) environment in order to increase its compatibility, as new targets are expected to be supported. The focus of this implementation is compatibility and extensibility, and not only performance.
+
+## Features
+
+### Supported
+- Configurable sampling rate up to 10Mhz on the F401RE platform
+- Basic parallel triggers
+- Generic compatibility with other platforms through the MBED API
+- Test mode where PWM signals from 1us to 500ms will be generated and then captured. You can use this mode to test the accuracy of each mode.
+
+### Planned
+- RLE support
+- Serial triggers (for speeds lower than 1MSPS)
+- Post trigger delay
+- External test modes
+
+### Limitations
+
+- Reaching 10MSPS requires the use of synchronous code (instead of a much better asynchronous, interrupt based approach, yet slower). If the sampling function is waiting for results or for a trigger, the board will be "stuck" waiting. Just push the reset and move on as nothing is wrong. The Green LED will be active if the board is waiting for the acquisition process to finish.
+
+## Download
+
+Get the source code from github and compile it using the ARM toolchain available from the [Launchpad page](https://launchpad.net/gcc-arm-embedded/+download). If you have the toolchain available, the Makefile will take care of all compilation and linking.
+
+In alternative you can also use the code in [mbed](https://mbed.org/). Just load the code without the mbed directory. 
+
+Finally download the latest precompiled binary from the [releases web page](https://github.com/jpbarraca/LogicAlNucleo/releases) and flash it. The binary file suits the NUCLEO-F401RE board.
\ No newline at end of file

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Sampler.cpp	Sat Mar 12 00:18:53 2016 +0000
@@ -0,0 +1,308 @@
+/*
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ GNU General Public License for more details.
+
+ Author: Joao Paulo Barraca <jpbarraca@gmail.com>
+*/
+
+#include "mbed.h"
+#include "Sampler.h"
+#include <algorithm>
+
+#define TRIGGER_PARALLEL 0
+#define TRIGGER_SERIAL 1
+#define TRIGGER_DISABLED 0xFF
+
+#define TRIGGER_MODE_SERIAL 0
+#define TRIGGER_MODE_PARALLEL 1
+
+#define FLAGS_DEMUX 1
+#define FLAGS_FILTER 2
+#define FLAGS_CHANNEL_GROUPS 0x3C
+#define FLAGS_EXTERNAL 0x40
+#define FLAGS_INVERTED 0x80
+#define FLAGS_TEST 0x400
+
+
+#define SUMP_ORIGINAL_FREQ  (100000000)
+#define SYSTEM_CLOCK_MULT (SystemCoreClock / 1000000)
+#define BUFFER_SIZE 32768
+#define MAX_FREQUENCY 10000000
+
+__attribute((section("AHBSRAM0"),aligned))  uint8_t  main_buffer[BUFFER_SIZE];
+
+#define likely(x) __builtin_expect((x),1)
+
+Sampler::Sampler(Serial *sp)
+{
+    pc = sp;
+    bufferSize = BUFFER_SIZE;
+    buffer =  main_buffer;
+
+    //Setup port
+    SET_BIT(RCC->AHB1ENR, RCC_AHB1ENR_GPIOBEN);
+    GPIOB->OSPEEDR = 3;         // High Speed
+    GPIOB->BSRR = 0xFFFF0000;   // No Special pins
+    GPIOB->MODER = 0;           // Input
+    GPIOB->PUPDR = 0;           // No pull up or pull down
+
+    reset();
+}
+
+void Sampler::reset()
+{
+    buffer_index = 0;
+    setTriggerMask(0);
+    setTriggerValue(0);
+    setTriggerState(0);
+    setSamplingDivider(11);
+    setFlags(0);
+    setSampleNumber(bufferSize);
+    setSamplingDelay(0);
+}
+
+uint32_t Sampler::getMaxFrequency(){
+    return MAX_FREQUENCY;
+}
+
+uint32_t Sampler::getBufferSize(){
+    return bufferSize;
+}
+
+void Sampler::setSamplingDivider(uint32_t divider)
+{
+    //Max speed is 10Mhz
+    if(divider < 9)
+        divider = 9;
+
+    samplingPeriod = (divider+1)*10;
+}
+
+void Sampler::setSampleNumber(uint32_t s)
+{
+    sampleNumber = min((uint32_t) bufferSize, s);
+}
+
+void Sampler::setSamplingDelay(uint16_t s)
+{
+    sampleDelay = s;
+}
+
+void Sampler::setTriggerMask(uint32_t s)
+{
+    triggerMask = s;
+}
+void Sampler::setTriggerValue(uint32_t s)
+{
+    triggerValue = s & 0xFF;
+}
+
+void Sampler::setTriggerState(uint8_t state){
+    triggerState = state;
+}
+
+void Sampler::setFlags(uint32_t s)
+{
+    flags = s;
+}
+
+void Sampler::runTest()
+{
+    //TODO
+}
+
+void Sampler::start()
+{
+
+    int32_t snum = sampleNumber;
+
+
+    if(sampleDelay > 0){
+        wait_us(sampleDelay);
+    }
+
+    if(triggerState == 1){
+        while((GPIOB->IDR & triggerMask) != triggerValue);
+    }
+    
+    //10Mhz (Close but not really...)
+    if(samplingPeriod == 100){
+        while(likely(snum >= 4)){
+            buffer[snum - 1] = GPIOB->IDR;
+            __asm volatile ( " NOP\nNOP\n");
+            buffer[snum - 2] = GPIOB->IDR;
+            __asm volatile ( " NOP\nNOP\n");
+            buffer[snum - 3] = GPIOB->IDR;  
+            __asm volatile ( " NOP\nNOP\n");
+            buffer[snum - 4] = GPIOB->IDR;  
+            snum -= 4;
+        }
+    //5Mhz (Almost)
+     }else  if(samplingPeriod == 200){
+        while(likely(snum >= 4)){
+            buffer[snum - 1] = GPIOB->IDR;
+            __asm volatile ( " NOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\n");
+            __asm volatile ( " NOP\nNOP\nNOP\n");
+            
+            buffer[snum - 2] = GPIOB->IDR;
+            __asm volatile ( " NOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\n");
+            __asm volatile ( " NOP\nNOP\nNOP\n");
+
+            buffer[snum - 3] = GPIOB->IDR;
+            __asm volatile ( " NOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\n");
+            __asm volatile ( " \nNOP\nNOP\nNOP\n");
+
+            buffer[snum - 4] = GPIOB->IDR;
+            __asm volatile ( " NOP\nNOP\nNOP\nNOP\nNOP\n");
+            snum -= 4;
+        }
+    //2Mhz (True)
+     }else if(samplingPeriod == 500){
+        while(likely(snum >= 4)){
+            
+            buffer[snum - 1] = GPIOB->IDR;
+            __asm volatile ( " NOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\n");
+            __asm volatile ( " NOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\n");
+            __asm volatile ( " NOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\n");
+            __asm volatile ( " NOP\nNOP\nNOP\nNOP\n");
+            
+            buffer[snum - 2] = GPIOB->IDR;
+            __asm volatile ( " NOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\n");
+            __asm volatile ( " NOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\n");
+            __asm volatile ( " NOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\n");
+            __asm volatile ( " NOP\nNOP\nNOP\n");
+            
+            buffer[snum - 3] = GPIOB->IDR;
+            __asm volatile ( " NOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\n");
+            __asm volatile ( " NOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\n");
+            __asm volatile ( " NOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\n");
+            __asm volatile ( " NOP\nNOP\nNOP\n");
+            
+            buffer[snum - 4] = GPIOB->IDR;
+            __asm volatile ( " NOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\n");
+            __asm volatile ( " NOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\n");
+            __asm volatile ( " NOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\n");
+            snum -= 4;
+        }
+        //1Mhz (True)
+     }else if(samplingPeriod == 1000){
+        while(likely(snum >= 4)){
+
+            buffer[snum - 1] = GPIOB->IDR;
+            __asm volatile ( " NOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\n");
+            __asm volatile ( " NOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\n");
+            __asm volatile ( " NOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\n");
+            __asm volatile ( " NOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP");
+            __asm volatile ( " NOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\n");
+            __asm volatile ( " NOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\n");
+            __asm volatile ( " NOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\n");
+            __asm volatile ( " NOP\nNOP\nNOP\n");
+            
+            buffer[snum - 2] = GPIOB->IDR;
+            __asm volatile ( " NOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\n");
+            __asm volatile ( " NOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\n");
+            __asm volatile ( " NOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\n");
+            __asm volatile ( " NOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP");
+            __asm volatile ( " NOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\n");
+            __asm volatile ( " NOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\n");
+            __asm volatile ( " NOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\n");
+            __asm volatile ( " NOP\nNOP\nNOP\n");
+            
+            buffer[snum - 3] = GPIOB->IDR;
+            __asm volatile ( " NOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\n");
+            __asm volatile ( " NOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\n");
+            __asm volatile ( " NOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\n");
+            __asm volatile ( " NOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP");
+            __asm volatile ( " NOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\n");
+            __asm volatile ( " NOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\n");
+            __asm volatile ( " NOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\n");
+            __asm volatile ( " NOP\nNOP\nNOP\n");
+            
+            buffer[snum - 4] = GPIOB->IDR;
+            __asm volatile ( " NOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\n");
+            __asm volatile ( " NOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\n");
+            __asm volatile ( " NOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\n");
+            __asm volatile ( " NOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP");
+            __asm volatile ( " NOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\n");
+            __asm volatile ( " NOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\n");
+            __asm volatile ( " NOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\nNOP\n");
+            snum -= 4;
+        }
+    //Others
+     }else {
+        uint32_t c = samplingPeriod/1000.0;
+        while(likely(snum >= 4)){
+            buffer[snum - 1] = GPIOB->IDR;
+            wait_us(c);
+            buffer[snum - 2] = GPIOB->IDR;
+            wait_us(c);
+            buffer[snum - 3] = GPIOB->IDR;
+            wait_us(c);
+            buffer[snum - 4] = GPIOB->IDR;
+            wait_us(c);
+            snum -= 4;
+        }
+    }
+}
+
+void Sampler::arm()
+{
+    if (flags & FLAGS_TEST) {
+        PwmOut pwm0(PB_0);
+        pwm0.period_us(1);
+        pwm0.write(0.5);
+
+        PwmOut pwm1(PB_1);
+        pwm1.period_us(10);
+        pwm1.write(0.5);
+
+        PwmOut pwm2(PB_3);
+        pwm2.period_us(100);
+        pwm2.write(0.5);
+
+        PwmOut pwm3(PB_4);
+        pwm3.period_us(500);
+        pwm3.write(0.5);
+
+        PwmOut pwm4(PB_5);
+        pwm4.period_ms(1);
+        pwm4.write(0.5);
+        
+        PwmOut pwm5(PB_6);
+        pwm5.period_ms(10);
+        pwm5.write(0.5);
+
+        PwmOut pwm6(PB_7);
+        pwm6.period_ms(100);
+        pwm6.write(0.5);
+
+        start();
+
+        pwm0.write(0);
+        pwm1.write(0);
+        pwm2.write(0);
+        pwm3.write(0);
+        pwm4.write(0);
+        pwm5.write(0);
+        pwm6.write(0);
+    }else{
+        start();
+    }
+
+    for(uint16_t i = 0;i < sampleNumber; i++)
+    {
+        pc->putc(buffer[i]);
+        while(!pc->writeable());
+    }
+}
+
+void Sampler::stop()
+{
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Sampler.h	Sat Mar 12 00:18:53 2016 +0000
@@ -0,0 +1,62 @@
+/*
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ GNU General Public License for more details.
+
+ Author: Joao Paulo Barraca <jpbarraca@gmail.com>
+*/
+
+#ifndef SAMPLER_H
+#define SAMPLER_H
+#include "mbed.h"
+
+class Sampler{
+
+public:
+
+    Sampler(Serial*);
+
+    void start();
+    void arm();
+    void stop();
+    void reset();
+    void runTest();
+
+    //Getters and Setters
+    uint32_t getBufferSize();
+    uint32_t getMaxFrequency();
+
+    void setSamplingDivider(uint32_t);
+    void setSampleNumber(uint32_t);
+    void setSamplingDelay(uint16_t);
+    void setTriggerMask(uint32_t);
+    void setTriggerValue(uint32_t);
+    void setTriggerState(uint8_t);
+    void setFlags(uint32_t);
+
+
+private:
+    uint8_t *buffer;
+    uint16_t buffer_index;
+    uint8_t buffer_rle_value;
+    uint8_t buffer_rle_count;
+
+    uint32_t samplingPeriod;
+    uint32_t sampleNumber;
+    uint32_t sampleDelay;
+    uint32_t triggerMask;
+    uint32_t triggerValue;
+    uint8_t  triggerState;
+    uint32_t flags;
+
+    uint32_t bufferSize;
+
+    Serial *pc;
+};
+#endif
\ No newline at end of file

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Sat Mar 12 00:18:53 2016 +0000
@@ -0,0 +1,218 @@
+/*
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ GNU General Public License for more details.
+
+ Author: Joao Paulo Barraca <jpbarraca@gmail.com>
+*/
+
+#include "mbed.h"
+#include "Sampler.h"
+
+#define SUMP_RESET 0x00
+#define SUMP_ARM   0x01
+#define SUMP_QUERY 0x02
+#define SUMP_TEST   0x03
+#define SUMP_GET_METADATA 0x04
+#define SUMP_RLE_FINISH 0x05
+#define SUMP_XON 0x11
+#define SUMP_XOFF 0x13
+#define SUMP_SET_TRIGGER_MASK 0xC0
+#define SUMP_SET_TRIGGER_VALUES 0xC1
+#define SUMP_SET_TRIGGER_CONF 0xC2
+#define SUMP_SET_DIVIDER 0x80
+#define SUMP_SET_READ_DELAY_COUNT 0x81
+#define SUMP_SET_FLAGS 0x82
+
+
+#define BYTE1(v) ((uint8_t)v & 0xff)         //LSB
+#define BYTE2(v) ((uint8_t)(v >> 8) & 0xff)  //
+#define BYTE3(v) ((uint8_t)(v >> 16) & 0xff) //
+#define BYTE4(v) ((uint8_t)(v >> 24) & 0xff) //MSB
+
+#define printChar(v) pc.putc(v); while(!pc.writeable());
+
+#define printUInt(v)\
+    printChar(BYTE4(v));\
+    printChar(BYTE3(v));\
+    printChar(BYTE2(v));\
+    printChar(BYTE1(v));
+
+
+#define printString(v)\
+    for(unsigned int i =0;i<strlen(v);i++) printChar(v[i]);
+
+Serial pc(USBTX, USBRX);
+DigitalOut led(LED2);
+Sampler sampler(&pc);
+
+inline void blink(unsigned int onTime,unsigned int offTime, unsigned int num){
+    for(unsigned int i=0;i<num;i++){
+        led = 1;
+        wait_ms(onTime);
+        led = 0;
+        wait_ms(offTime);
+    }
+}
+
+void handleSerial()
+{
+    uint8_t cmd_buffer[5];
+    uint8_t cmd_index = 0;
+    memset(cmd_buffer, 0, sizeof(cmd_buffer));
+    
+    led = 0;
+
+    //Looping through the serial.   
+    while (1) {
+        led = 0;
+
+        while(!pc.readable());
+        
+        led = 1;        
+        cmd_buffer[cmd_index] = pc.getc();
+        switch(cmd_buffer[0]) {
+            case SUMP_RESET : {
+                break;
+            }
+            case SUMP_QUERY:  {
+                printString("1ALS");
+                break;
+            }
+            case SUMP_GET_METADATA: {
+                uint32_t bufferSize = sampler.getBufferSize();
+                uint32_t maxFrequency = sampler.getMaxFrequency();
+
+                while(!pc.writeable());
+                //NAME
+                printChar(0x01);
+                printString("LogicalNucleo");
+                printChar(0x00);
+
+                //SAMPLE MEM
+                printChar(0x21);
+                printUInt(bufferSize);
+
+                //DYNAMIC MEM
+                printChar(0x22);
+                printUInt(0);
+
+                //SAMPLE RATE
+                printChar(0x23);
+                printUInt(maxFrequency);
+
+                //Number of Probes
+                printChar(0x40);
+                printChar(0x08);
+
+                //Protocol Version
+                printChar(0x41);
+                printChar(0x02);
+            
+                //END
+                printChar(0x00);
+                break;
+            }
+            case SUMP_TEST:{
+                sampler.runTest();
+                break;    
+            }
+            case SUMP_ARM: {
+                sampler.arm();
+                break;
+            }
+            case SUMP_XON: {
+                sampler.start();
+                break;
+            }
+            case SUMP_XOFF: {
+                sampler.stop();
+                break;
+            }
+            case SUMP_SET_READ_DELAY_COUNT: {
+                cmd_index ++;
+                if(cmd_index < 5)
+                    continue;
+
+                uint16_t readCount  = 1 + *((uint16_t*)(cmd_buffer + 1));
+                uint16_t delayCount = * ((uint16_t*)(cmd_buffer + 3));
+                sampler.setSampleNumber(4 * readCount);
+                sampler.setSamplingDelay(4 * delayCount);
+                break;
+            }
+            case SUMP_SET_DIVIDER: {
+                cmd_index ++;
+                if(cmd_index < 5)
+                    continue;
+                
+                uint32_t divider = *((uint32_t *)(cmd_buffer + 1));
+                sampler.setSamplingDivider(divider);
+                break;
+            }
+            case SUMP_SET_TRIGGER_MASK:{
+                cmd_index ++;
+                if(cmd_index < 5)
+                    continue;
+                sampler.setTriggerMask(*(uint32_t *)(cmd_buffer + 1));
+                break;
+            }
+            case SUMP_SET_TRIGGER_VALUES:{
+                cmd_index ++;
+                if(cmd_index < 5)
+                    continue;
+                
+                sampler.setTriggerValue(*(uint32_t *)(cmd_buffer + 1));
+                break;
+            }
+            case SUMP_SET_TRIGGER_CONF:{
+                cmd_index ++;
+                if(cmd_index < 5)
+                    continue;
+
+                uint8_t serial = (*((uint8_t*)(cmd_buffer + 4)) & 0x04) > 0 ? 1 : 0;
+                uint8_t state = (*((uint8_t*)(cmd_buffer + 4)) & 0x08) > 0 ? 1 : 0;
+
+                if(serial == 1)
+                    sampler.setTriggerState(0);//Not supported
+                else
+                    sampler.setTriggerState(state); 
+
+                break;
+            }
+            case SUMP_SET_FLAGS:{
+                cmd_index ++;
+                if(cmd_index < 5)
+                    continue;
+                
+                sampler.setFlags(*(uint32_t *)(cmd_buffer + 1));
+                break;
+            }
+            default: {
+            }
+        }
+
+        cmd_index = 0;
+        memset(cmd_buffer, 0, sizeof(cmd_buffer));
+    }
+}
+
+
+
+int main()
+{
+    pc.baud(115200);
+
+    //Flush it
+    while(pc.readable() == 1)
+        pc.getc();
+
+    blink(50,100,5);
+
+    handleSerial();
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Sat Mar 12 00:18:53 2016 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/builds/87f2f5183dfb
\ No newline at end of file