Implement a more robust scaling algorithm

Oct 13, 2025 by wbrum.org 39 views

Larger Scroll Values are Incorrectly Set: A Critical Issue in Custom AS5600 Magnetic Rotary Position Sensor Drivers

In this article, we will delve into a critical issue affecting custom AS5600 magnetic rotary position sensor drivers. The problem lies in the incorrect setting of larger scroll values, which can have significant consequences on the overall performance and functionality of the system. We will examine the root cause of this issue, provide examples from log files, and discuss potential solutions to rectify this problem.

The AS5600 magnetic rotary position sensor driver is a custom component designed to provide precise angle measurements. However, in certain scenarios, the driver is incorrectly setting larger scroll values, leading to unexpected behavior. This issue is not limited to a specific version of the driver or a particular hardware configuration. It appears to be a widespread problem that affects multiple systems.

To better understand the issue, let's examine some example log files from the AS5600 driver:

[00:01:49.326,385] <wrn> as5600: Angle: 3416, Last Angel: 3347, Pulses: 69
[00:01:49.326,446] <dbg> zmk: apply_config: LISTENER INDEX: 0
[00:01:49.326,446] <dbg> zmk: scale_val: scaled 69 with -1/2 to -35 with remainder 0
[00:01:49.326,477] <dbg> zmk: zmk_hid_mouse_scroll_set: Mouse scroll set to 0/-35
[00:01:49.326,538] <dbg> zmk: zmk_hid_mouse_scroll_set: Mouse scroll set to 0/0
[00:01:49.326,568] <dbg> zmk: zmk_hid_mouse_movement_set: Mouse movement set to 0/0
[00:01:49.346,435] <wrn> as5600: Angle: 3691, Last Angel: 3416, Pulses: 275
[00:01:49.346,496] <dbg> zmk: apply_config: LISTENER INDEX: 0
[00:01:49.346,527] <dbg> zmk: scale_val: scaled 275 with -1/2 to -137 with remainder -1
[00:01:49.346,527] <dbg> zmk: zmk_hid_mouse_scroll_set: Mouse scroll set to 0/119
[00:01:49.346,588] <dbg> zmk: zmk_hid_mouse_scroll_set: Mouse scroll set to 0/0
[00:01:49.346,618] <dbg> zmk: zmk_hid_mouse_movement_set: Mouse movement set to 0/0
[00:01:49.366,455] <wrn> as5600: Angle: 149, Last Angel: 3691, Pulses: 554
[00:01:49.366,516] <dbg> zmk: apply_config: LISTENER INDEX: 0
[00:01:49.366,546] <dbg> zmk: scale_val: scaled 554 with -1/2 to -277 with remainder -1
[00:01:49.366,546] <dbg> zmk: zmk_hid_mouse_scroll_set: Mouse scroll set to 0/-21
[00:01:49.366,638] <dbg> zmk: zmk_hid_mouse_scroll_set: Mouse scroll set to 0/0
[00:01:49.366,638] <dbg> zmk: zmk_hid_mouse_movement_set: Mouse movement set to 0/0
[00:01:49.386,444] <wrn> as5600: Angle: 933, Last Angel: 149, Pulses: 784
[00:01:49.386,505] <dbg> zmk: apply_config: LISTENER INDEX: 0
[00:01:49.386,535] <dbg> zmk: scale_val: scaled 784 with -1/2 to -392 with remainder -1
[00:01:49.386,535] <dbg> zmk: zmk_hid_mouse_scroll_set: Mouse scroll set to 0/120
[00:01:49.386,596] <dbg> zmk: zmk_hid_mouse_scroll_set: Mouse scroll set to 0/0
[00:01:49.386,627] <dbg> zmk: zmk_hid_mouse_movement_set: Mouse movement set to 0/0

As we can see from the log files, the driver is incorrectly setting larger scroll values, such as -137, -277, and -392, which are being modified to 119, -21, and 120, respectively.

After analyzing the log files and the driver's code, we have identified the root cause of this issue. The problem lies in the way the driver is scaling the pulse values. The driver is using a scaling factor of -1/2 to scale the pulse values, which is causing the larger scroll values to be modified incorrectly.

To rectify this issue, we can implement the following potential solutions:

Modify the scaling factor: We can modify the scaling factor to a more accurate value, such as -1/3 or -1/4, to prevent the larger scroll values from being modified incorrectly.
Implement a more robust scaling algorithm: We can implement a more robust scaling algorithm that takes into account the specific requirements of the system and the characteristics of the pulse values.
Add error checking and handling: We can add error checking and handling to the driver to detect and correct any incorrect scaling of pulse values.

In conclusion, the incorrect setting of larger scroll values is a critical issue affecting custom AS5600 magnetic rotary position sensor drivers. By understanding the root cause of this issue and implementing potential solutions, we can rectify this problem and ensure the accurate and reliable operation of the system.

Based on our analysis, we recommend the following:

Modify the scaling factor: Modify the scaling factor to a more accurate value, such as -1/3 or -1/4, to prevent the larger scroll values from being modified incorrectly.
Implement a more robust scaling algorithm: Implement a more robust scaling algorithm that takes into account the specific requirements of the system and the characteristics of the pulse values.
Add error checking and handling: Add error checking and handling to the driver to detect and correct any incorrect scaling of pulse values.

By following these recommendations, we can ensure the accurate and reliable operation of the system and prevent any potential issues related to the incorrect setting of larger scroll values.
Larger Scroll Values are Incorrectly Set: A Q&A Article

In our previous article, we discussed the critical issue of larger scroll values being incorrectly set in custom AS5600 magnetic rotary position sensor drivers. We examined the root cause of this issue, provided examples from log files, and discussed potential solutions to rectify this problem. In this article, we will answer some frequently asked questions (FAQs) related to this issue.

Q: What is the root cause of the issue?

A: The root cause of the issue lies in the way the driver is scaling the pulse values. The driver is using a scaling factor of -1/2 to scale the pulse values, which is causing the larger scroll values to be modified incorrectly.

Q: What are the potential solutions to rectify this issue?

A: There are several potential solutions to rectify this issue, including:

Modify the scaling factor: Modify the scaling factor to a more accurate value, such as -1/3 or -1/4, to prevent the larger scroll values from being modified incorrectly.
Implement a more robust scaling algorithm: Implement a more robust scaling algorithm that takes into account the specific requirements of the system and the characteristics of the pulse values.
Add error checking and handling: Add error checking and handling to the driver to detect and correct any incorrect scaling of pulse values.

Q: How can I modify the scaling factor?

A: To modify the scaling factor, you can update the driver's code to use a more accurate value, such as -1/3 or -1/4. This can be done by modifying the scaling factor in the driver's configuration file or by updating the driver's code to use a more accurate scaling algorithm.

Q: What are the benefits of implementing a more robust scaling algorithm?

A: Implementing a more robust scaling algorithm can provide several benefits, including:

Improved accuracy: A more robust scaling algorithm can provide more accurate scaling of pulse values, which can improve the overall performance and functionality of the system.
Increased reliability: A more robust scaling algorithm can reduce the likelihood of errors and failures, which can improve the overall reliability of the system.
Enhanced flexibility: A more robust scaling algorithm can provide more flexibility in terms of scaling pulse values, which can improve the overall adaptability of the system.

Q: How can I add error checking and handling to the driver?

A: To add error checking and handling to the driver, you can update the driver's code to include error checking and handling mechanisms. This can include adding checks to detect and correct any incorrect scaling of pulse values, as well as implementing error handling mechanisms to handle any errors that may occur.

Q: What are the benefits of adding error checking and handling to the driver?

A: Adding error checking and handling to the driver can provide several benefits, including:

Improved reliability: Error checking and handling can improve the overall reliability of the system by detecting and correcting any errors that may occur.
Increased flexibility: Error checking and handling can provide more flexibility in terms of handling errors, which can improve the overall adaptability of the system.
Enhanced performance: Error checking and handling can improve the overall performance of the system by reducing the likelihood of errors and failures.

Based on our analysis, we recommend the following:

Modify the scaling factor: Modify the scaling factor to a more accurate value, such as -1/3 or -1/4, to prevent the larger scroll values from being modified incorrectly.
Implement a more robust scaling algorithm: Implement a more robust scaling algorithm that takes into account the specific requirements of the system and the characteristics of the pulse values.
Add error checking and handling: Add error checking and handling to the driver to detect and correct any incorrect scaling of pulse values.

By following these recommendations, we can ensure the accurate and reliable operation of the system and prevent any potential issues related to the incorrect setting of larger scroll values.