Скачать или смотреть How to Successfully Setup PWM on STM32F100 with SPL

Discover effective troubleshooting techniques for setting up `PWM` on your STM32F100 microcontroller using Standard Peripheral Libraries (SPL).
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Troubleshooting Your STM32F100 PWM Setup

If you’re diving into the world of embedded systems, you may have encountered difficulties while setting up Pulse Width Modulation (PWM) on your STM32F100 microcontroller. It can be frustrating when your code seems correct but you still can’t get a signal out of your pin. In this guide, we will explore a user's struggle with PWM on their device and the effective solution they discovered.

The Problem

The user faced issues with the PWM setup for TIM3 Channel 1 on pin PC6. After modifying some parameters, they still couldn’t achieve a proper PWM output. Here's a succinct rundown of what was initially attempted:

Timer Configuration:

Prescaler was set to 65535 which seemed excessive.

Period was initialized to 100-1.

Output Configuration:

Channel settings were defined, but misconfigurations persisted.

Remapping Errors:

The user believed incorrect pin remapping was hindering the setup.

Despite making changes such as adjusting the pulse width and timer parameters, the user still found themselves at a standstill.

The Solution

After seeking some help, a colleague provided a clue that led to a resolution. Here's a breakdown of the adjustments that led to a successful PWM configuration.

Key Adjustments Made

Pin Remapping Management:

The most crucial change was the proper placement of the pin remap function. The wrong placement originally caused conflicts between different PWM outputs.

Timer Configuration:

The prescaler was adjusted down from 65535 to 24-1, accommodating a proper clock rate for PWM generation.

The period was defined correctly as 10000-1, allowing for a wider range of PWM signal values.

GPIO Initialization:

Ensured the GPIO mode was set to alternate function (AF_PP) correctly for effective PWM signal output.

Established the correct speed for GPIO to optimize performance.

Comments in the Code:

Including detailed comments within the code not only clarified the purpose of each section but made it easier for others to understand what each part of the code is doing.

Final Code Implementation

Here’s the finalized code that ensured everything worked as expected:

[[See Video to Reveal this Text or Code Snippet]]

Setting the PWM Signal

After initialization, you can set the desired PWM value using:

[[See Video to Reveal this Text or Code Snippet]]

Conclusion

Navigating the features of the STM32F100, especially in SPL, can pose its challenges. However, clarity in your configuration steps—especially remapping pins and timer settings—plays a vital role in successful PWM operation. Ultimately, persistence mixed with a bit of collaboration can lead to effective solutions in embedded system development.

If you find yourself stuck, don't hesitate to reach out for assistance, as the coding community is always eager to help!