Arduino MKR NB 1500 board documentation

Oct 13, 2025 by leolavanderia.com.br 62 views

Using end() hangs on SAMD21 (MKR NB 1500)

Hello everyone,

In this article, we will be discussing an issue with the end() function hanging on the SAMD21 microcontroller, specifically on the Arduino MKR NB 1500 board. The problem arises when trying to use the end() function after it has been called once, resulting in a timer fault on the board. We will explore the possible causes of this issue and provide a solution to resolve the problem.

The Arduino MKR NB 1500 board is a powerful and versatile microcontroller board that is designed for IoT applications. It features a SAMD21 microcontroller, which is a 32-bit ARM Cortex-M0+ processor. The board is equipped with a range of features, including Wi-Fi and Bluetooth connectivity, making it an ideal choice for IoT projects.

The issue arises when trying to use the end() function after it has been called once. The end() function is used to reset the timer and free up resources, but it seems to hang when called multiple times. This results in a timer fault on the board, which can cause the program to crash or behave erratically.

There are several possible causes of this issue, including:

Timer manipulation: The begin() and end() functions manipulate the timer, which can cause issues if called multiple times. This could be the cause of the timer fault on the board.
Bit.SYNCBUSY while loops: The bit.SYNCBUSY while loops are used to wait for the timer to be reset, but they may not be working correctly, causing the program to hang.
Resource leaks: The end() function may not be properly releasing resources, causing the program to hang.

To resolve this issue, we need to identify the cause of the problem and provide a solution. Here are a few possible solutions:

Call begin() and end() only once: As mentioned earlier, calling begin() and end() only once may resolve the issue. This is because the timer is only manipulated once, and the resources are only released once.
Use a different timer: If the issue is caused by the timer manipulation, we may need to use a different timer that is not affected by the begin() and end() functions.
Optimize the bit.SYNCBUSY while loops: We may need to optimize the bit.SYNCBUSY while loops to ensure that they are working correctly and not causing the program to hang.
Use a different library: If the issue is caused by the library itself, we may need to use a different library that is designed for the SAMD21 microcontroller.

In conclusion, the end() function hanging on the SAMD21 microcontroller is a complex issue that requires careful analysis and troubleshooting. By identifying the cause of the problem and providing a solution, we can resolve the issue and ensure that our program runs smoothly and efficiently.

Here are some troubleshooting tips to help you resolve the issue:

Use a debugger: A debugger can help you identify the cause of the problem and provide a solution.
Use print statements: Print statements can help you identify the flow of the program and where the issue is occurring.
Use a different library: If the issue is caused by the library itself, we may need to use a different library that is designed for the SAMD21 microcontroller.
Optimize the code: Optimizing the code can help resolve the issue and improve the performance of the program.

Here are some additional information that may be helpful in resolving the issue:

Arduino MKR NB 1500 board documentation: The Arduino MKR NB 1500 board documentation provides information on the board's features and capabilities.
SAMD21 microcontroller documentation: The SAMD21 microcontroller documentation provides information on the microcontroller's features and capabilities.
Library documentation: The library documentation provides information on the library's features and capabilities.

Here are some references that may be helpful in resolving the issue:

Arduino MKR NB 1500 board documentation: The Arduino MKR NB 1500 board documentation provides information on the board's features and capabilities.
SAMD21 microcontroller documentation: The SAMD21 microcontroller documentation provides information on the microcontroller's features and capabilities.
Library documentation: The library documentation provides information on the library's features and capabilities.

Here are some frequently asked questions that may be helpful in resolving the issue:

Q: What is the cause of the issue? A: The cause of the issue is the end() function hanging on the SAMD21 microcontroller.
Q: How can I resolve the issue? A: You can resolve the issue by calling begin() and end() only once, using a different timer, optimizing the bit.SYNCBUSY while loops, or using a different library.
Q: What are the troubleshooting tips? A: The troubleshooting tips include using a debugger, using print statements, using a different library, and optimizing the code.
Q&A: Using end() hangs on SAMD21 (MKR NB 1500)

Here are some frequently asked questions that may be helpful in resolving the issue:

Q: What is the cause of the issue? A: The cause of the issue is the end() function hanging on the SAMD21 microcontroller. This can be due to various reasons such as timer manipulation, bit.SYNCBUSY while loops, or resource leaks.

Q: How can I resolve the issue? A: You can resolve the issue by calling begin() and end() only once, using a different timer, optimizing the bit.SYNCBUSY while loops, or using a different library.

Q: What are the troubleshooting tips? A: The troubleshooting tips include using a debugger, using print statements, using a different library, and optimizing the code.

Q: Can I use a different library? A: Yes, you can use a different library that is designed for the SAMD21 microcontroller. This may resolve the issue if it is caused by the library itself.

Q: How do I optimize the code? A: You can optimize the code by reducing the number of bit.SYNCBUSY while loops, using a different timer, or using a different library.

Q: Can I use a different timer? A: Yes, you can use a different timer that is not affected by the begin() and end() functions. This may resolve the issue if it is caused by the timer manipulation.

Q: What are the benefits of using a different library? A: Using a different library can provide several benefits such as improved performance, reduced resource usage, and better compatibility with the SAMD21 microcontroller.

Q: How do I choose a different library? A: You can choose a different library by considering factors such as compatibility with the SAMD21 microcontroller, performance, resource usage, and documentation.

Q: Can I use a different library if I am already using a library? A: Yes, you can use a different library even if you are already using a library. However, you may need to modify your code to accommodate the new library.

Q: How do I modify my code to accommodate a new library? A: You can modify your code by replacing the old library with the new library, updating the code to use the new library's functions and features, and testing the code to ensure it works correctly.

Q: What are the best practices for using a library? A: The best practices for using a library include choosing a library that is compatible with the SAMD21 microcontroller, following the library's documentation, testing the code thoroughly, and updating the code regularly to ensure it works correctly.

Q: Can I use a library that is not designed for the SAMD21 microcontroller? A: No, you should not use a library that is not designed for the SAMD21 microcontroller. This can cause issues such as compatibility problems, performance issues, and resource leaks.

Q: How do I report an issue with a library? A: You can report an issue with a library by contacting the library's author, providing detailed information about the issue, and following the library's documentation for reporting issues.

Q: What are the benefits of reporting an issue with a library? A: Reporting an issue with a library can provide several benefits such as improved library quality, better compatibility with the SAMD21 microcontroller, and improved performance.

Q: How do I contribute to a library? A: You can contribute to a library by providing feedback, reporting issues, suggesting new features, and helping to maintain the library.

Q: What are the benefits of contributing to a library? A: Contributing to a library can provide several benefits such as improved library quality, better compatibility with the SAMD21 microcontroller, and improved performance.

Q: How do I get started with contributing to a library? A: You can get started with contributing to a library by reading the library's documentation, contacting the library's author, and following the library's guidelines for contributing.

Q: What are the best practices for contributing to a library? A: The best practices for contributing to a library include following the library's documentation, providing detailed information about the issue or feature, and testing the code thoroughly to ensure it works correctly.