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kandi X-RAY | hal Summary
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hal Key Features
hal Examples and Code Snippets
Community Discussions
Trending Discussions on hal
QUESTION
I just started programming a STM32 and generated a code with CubeMX for an SPI communcation with a gyroscope (L3GD20) I have a problem with the HAL_SPI commands.
I first try to read the WHO_AM_I register which return a good response (0xD4)
Then I tried to do the same with CTRL_REG1 register and it was still good by returning (0x07).
But if I try to get both of them one after the other, the HAL_SPI_Receive keeps sending the data of the first HAL_SPI_Transmit of the code...
Tried to give it other buffers but still didn't work.
Here is the part of the code I'm intersted in :
...ANSWER
Answered 2021-Jun-11 at 10:26Since HAL_SPI_Receive is already using HAL_SPI_TransmitReceive (github stm32f4 spi driver) to send dummy data to generate clock, you can use that fact and ditch the HAL_SPI_Transmit, and use the receive function like this:
QUESTION
I run my Android app (based on Java), and it works. Next, I add to my app code:
FirebaseFirestore fdb = FirebaseFirestore.getInstance();
This code I got from the official Android site https://firebase.google.com/docs/firestore/quickstart
App runs, but next the running device shows the message "app has stopped".
I use a device simulator available in Android Studio.
It is my first Android app, and I can't understand what is going.
----Trace------ 2021-06-08 20:57:30.186 7155-7155/? D/AndroidRuntime: >>>>>> START com.android.internal.os.RuntimeInit uid 2000 <<<<<< 2021-06-08 20:57:30.188 7155-7155/? D/AndroidRuntime: CheckJNI is ON 2021-06-08 20:57:30.210 7155-7155/? W/art: Unexpected CPU variant for X86 using defaults: x86 2021-06-08 20:57:30.214 7155-7155/? D/ICU: No timezone override file found: /data/misc/zoneinfo/current/icu/icu_tzdata.dat 2021-06-08 20:57:30.229 7155-7155/? E/memtrack: Couldn't load memtrack module (No such file or directory) 2021-06-08 20:57:30.229 7155-7155/? E/android.os.Debug: failed to load memtrack module: -2 2021-06-08 20:57:30.230 7155-7155/? I/Radio-JNI: register_android_hardware_Radio DONE 2021-06-08 20:57:30.239 7155-7155/? D/AndroidRuntime: Calling main entry com.android.commands.am.Am
...ANSWER
Answered 2021-Jun-09 at 03:39At the end of your log, just before the initial crash. there is a warning:
Default FirebaseApp failed to initialize because no default options were found. This usually means that com.google.gms:google-services was not applied to your gradle project.
simply adding com.google.gms:google-services should fix any issues you have, if you have issues, ensure your Gradle cache is cleared or run without the build cache
--no-build-cache
QUESTION
I'm running into an issue with trait bounds and can't understand what I'm doing wrong. I'm working with the arduino-uno crate from avr-hal and I have a function that reads the ADC, implemented as follows:
...ANSWER
Answered 2021-Jun-05 at 14:56The compiler error says:
the trait bound
&mut T: avr_hal_generic::embedded_hal::adc::Channelis not satisfied
Notice that the error is asking for &mut T to implement Channel, &mut T: Channel<...>, whereas your T has the bound T: Channel<...> — applying to T itself rather than &mut T. That's why the bound you've already written isn't helping.
Now, what's the right fix? If I look at the docs you linked, I can find the type of ::read. (Note: I copied the text from the docs to construct this snippet; I didn't read the source code.)
QUESTION
I want to implement an embedded project using stm32F0 (arm-based) with VS Code. The project ran properly on other systems.
- I Added C/C++ extension to visual studio
- I installed a compiler for cortex-m0 arm: GNU Arm Embedded toolchain/gcc arm for windows.
- Makefiles installed: binaries file + dependencies file
- openOCD installed (open On Chip Debugger)
- tasks.json (build instructions), c_cpp_properties.json (compiler path and IntelliSense settings) were created. I modified the Include path because my program includes header files that aren't in my workspace, and that is not in the standard library path.
c_cpp_properties.json file
...ANSWER
Answered 2021-May-27 at 13:45Cannot open source file avr/io.h (dependency of hal.h)
You appear to be using ChibiOS whhich has a file hal.h which includes halconf.h which includes mcuconf.h. Clearly you appear to have an AVR port of ChibiOS where you need STM32 or ARM Cortex-M support.
But, how VS Code can find dependencies before compiling?
The same way as the compiler/pre-processor do, by having include paths configured, parsing the project files and accounting for any externally defined (command line) macros.
I also was wondering if I should add a path for main.cpp file and other C and CPP files in the configuration file of VS Code to solve these problems?
I believe it will parse project files in any case. It only needs to find the header files included in a source file to provide context for the parsing of the sourcefile.
For debugging, I don't see any debugger in the list, though I installed openOCD and add the path in the environment variable
That is an entirely different question - post a new question for that.
QUESTION
I am trying to build a Spring Boot application that combines Webflux, OAuth2 and HATEOAS. Building a minimal application with Webflux and OAuth2 works OK, but as soon as I add HATEOAS, my minimal test fails.
build.gradle:
ANSWER
Answered 2021-May-30 at 20:53org.springframework.boot:spring-boot-starter-hateoas is indeed incompatible with org.springframework.boot:spring-boot-starter-webflux so instead of using org.springframework.boot:spring-boot-starter-hateoas, pull in the Spring HATEOAS dependency itself:
QUESTION
I'm currently trying to learn Rust (for embedded specifically), coming from a background of C for embedded systems and Python. So far, I've been reading Rust Programming Language and Rust for Embedded, and read a few blog posts on the web.
I want my first project to be a simple "Blinky", where an LED blinks infinitely. I've got an STM32L152CDISCOVERY board with an STM32L152 chip in it (basically same as STM32L151), which is a Cortex M3.
Instead of implementing everything from scratch, I want to leverage existing crates and HALs. I've found two that seem promising: stm32l1 and stm32l1xx-hal. I've tried to read the documentation of each of them and also part of the source code, but I still can't figure out how to use them correctly.
Got a few questions about Rust and about the crates:
I see that
stm32l1xx-halhas a dependency onstm32l1. Do I need to add both as a dependency in myCargo.tomlfile? Or will that create problems related to ownership?Is this the correct way to add them? Why is the second one added like that
...[dependencies.stm32l1]?
ANSWER
Answered 2021-May-29 at 19:32I got some help from a Discord community. The answers were (modified a bit by me):
stm32l1xx-halalready depends onstm32l1as seen here. There's no need to import it twice. It is enough to add to Cargo.toml:
QUESTION
I am reading from an external API with hypermedia links and OAuth2 authentication using Spring's WebClient. When accessing the API the JSON data is correctly converted to model objects but the supplied HAL links are either omitted if the model object extends Spring HATEOAS RepresentationModel or give a NullPointerException when the model object extends EntityModel. I suspect a problem with the hypermediaWebClientCustomizer but was not able to solve it as of now.
I tried reading the JSON with a Traverson client in a testcase. That was basically working, if i replaced relative URIs with absolute URIs and the application/json header with a application/hal+json header. I would go on with Traverson but besides these two problems Traverson requires a RestTemplate (OAuth2RestTemplate in this case), which is no longer available in our Spring version.
Any ideas if there is a problem with the configuration or what else could go wrong?
This is my configuration:
dependencies (in part)
...ANSWER
Answered 2021-Apr-01 at 12:55It seems the content-header hal+json was the missing piece, although i'm sure quite sure i tried this before. Probably something else was wrong before that has been fixed in between. At least the test case is now working with this:
QUESTION
I'm using STM32f103 and in my program, I need to save some bytes in the internal flash memory. But as far as I know, I have to erase a whole page to write in it, which will take time. This delay causes my display to blink. Can anybody help me to save my data without consuming so much time?
Here is a list that may help:
1- MCU: STM32f103
2- IDE: Keil vision
3- using HAL driver provided by STM32CubeMx
4- sample data for saving in Flash: {0x53, 0xa0, 0x01, 0x54}
In the link below, you can find the code that I'm using.
...ANSWER
Answered 2021-May-23 at 10:47The code you provide doesn't seem to be implemented well. It basically does 2 things each time you initiate a write operation:
- Erase the page (this is the part that takes time)
- Start form the given pointer, write until it hits a zero.
This is a very ineffective way of using the flash.
Probably the simplest and the most well-known way is to use the method described in ST's AN2594, although it has some limitations.
Still, at some point a page erase will be necessary regardless the method you use and there is no way to avoid some delay, unless your uC supports dual flash banks (STM32F103 don't have this feature). You need to plan the timing of flash writes and display refresh accordingly. If you need periodic writes to the flash, there is probably some high level error in your design.
QUESTION
I'm attempting to find all senders who have sent to 4 or more separate receivers (by name), where the total amount sent to those separate receivers exceeds $5000.00 and looking for a way to tell r to maintain all values containing the distinct names, instead of just one.
For instance, using the following data.frame:
...ANSWER
Answered 2021-May-21 at 00:10We could use
QUESTION
I am trying to access a HTML div using @ViewChild based on a JavaScript object as shown below:
...ANSWER
Answered 2021-May-18 at 18:16In your callback to forEach() you use this. You think it refers to the component but it does not. You can easily see this if you log this to the console. Or you can use a debugger and set a breakpoint inside your callback.
You need to use an arrow function to correctly capture the value of this.
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Vulnerabilities
No vulnerabilities reported
Install hal
You can use hal like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.
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