# LED Brightness using PWM via PDL

## L*ab Objective:*

This Lab demonstrates the process of controlling an LED brightness using PWM via Peripheral Driver Library (PDL) on a PSoC 6 microcontroller.

## 🔥 Requirements

<table><thead><tr><th width="429">Resources</th><th>Links</th></tr></thead><tbody><tr><td>Computer</td><td>💻</td></tr><tr><td>ModusToolbox™ software v3.0 or later</td><td><a href="https://www.infineon.com/modustoolbox">Link</a></td></tr><tr><td>CY8CKIT-062S2-43012 Infineon Board</td><td><a href="https://github.com/Advance-Innovation-Centre-AIC/BIIL_MTB-100_Hello_World_and_LED_Blinking_Programming_Template/assets/88732241/0215501d-b774-4045-8e64-ef49e28d8404">Link</a></td></tr><tr><td>Technical Report</td><td><a href="https://www.dropbox.com/scl/fi/amaxc94pte0ut2i1r5ewx/Technical-Report-Lab00.paper?rlkey=b3xm3vrerz9xgv1glb30cvy9z&#x26;dl=0">dropbox</a></td></tr></tbody></table>

## 🚩 Let start

### Create Application

<figure><img src="/files/P3mlGvBInDKMoWKCZ8eo" alt=""><figcaption><p>Create Application</p></figcaption></figure>

### Use Device Configurator and set the button pin to have a falling edge interrupt.

<figure><img src="/files/4CIJzlIha3FeaJZ2qEcz" alt="" width="250"><figcaption><p>Open Device Configurator</p></figcaption></figure>

<figure><img src="/files/b7j7uYKksjWbaZ0OVaSN" alt=""><figcaption><p>Enable LED Pin </p></figcaption></figure>

<figure><img src="/files/p9Iyoq56TjxTt6e1Pwxr" alt=""><figcaption><p>Set up Peripherals</p></figcaption></figure>

### Coding

* Coding: Open the main.c file and add the following code to the main(void) function.

{% code title="main.c" %}

```c
#include "cy_pdl.h"
#include "cybsp.h"

int main(void)
{
    cy_rslt_t result;

    /* Initialize the device and board peripherals */
    result = cybsp_init() ;
    if (result != CY_RSLT_SUCCESS)
    {
        CY_ASSERT(0);
    }

    /* Enable global interrupts */
    __enable_irq();

    // Initialize the TCPWM block
	Cy_TCPWM_PWM_Init(PWM_HW, PWM_NUM, &PWM_config);
	// Enable the TCPWM block
	Cy_TCPWM_PWM_Enable(PWM_HW, PWM_NUM);
	// Start the PWM
	Cy_TCPWM_TriggerReloadOrIndex(PWM_HW, PWM_MASK);

    for (;;)
    {
    	for(int i = 0; i < 500; i++){
    		Cy_TCPWM_PWM_SetCompare0(PWM_HW, PWM_NUM, i);
    		Cy_SysLib_Delay(10); // Delay 10 ms
    	}
    }
}
```

{% endcode %}

### Build the Application

<figure><img src="/files/iMqfvrWct1Y8CbsEd1rA" alt=""><figcaption></figcaption></figure>

### Launching the Application

<figure><img src="/files/rMDAqmgMymDeHqcz3udC" alt=""><figcaption></figcaption></figure>

> Note: Before launching the program to the board, make sure that you have already connected the board to the computer through a USB cable.

<figure><img src="https://github.com/Advance-Innovation-Centre-AIC/BIIL_MTB-100_Hello_World_and_LED_Blinking_Programming_Template/assets/88732241/7a6bb6ef-cb63-4613-98a1-42f9617ad724" alt="" width="188"><figcaption><p>set up USB cable</p></figcaption></figure>

### Result&#x20;

<figure><img src="/files/h6K0LtGX6KJ0e4FuLSK1" alt="" width="563"><figcaption><p>LED will gradually change intensity (LED Brightness).</p></figcaption></figure>

{% hint style="info" %}
If you chose a period of 100, you can easily set the duty cycle from 0 to 100 by changing the compare value. Just be sure to use a clock that is fast enough so that even when divided by 100 it is faster than a human eye can see so that the LED appears dim instead of blinking
{% endhint %}

> #### 🎉 <mark style="color:blue;">Congratulations! You can now complete Lab110</mark>

## Supported toolchains (make variable 'TOOLCHAIN')

* GNU Arm® embedded compiler v10.3.1 (`GCC_ARM`) - Default value of `TOOLCHAIN`
* Arm® compiler v6.16 (`ARM`)
* IAR C/C++ compiler v9.30.1 (`IAR`)

## Supported kits (make variable 'TARGET')

* [PSoC™ 62S2 Wi-Fi Bluetooth® pioneer kit](https://www.infineon.com/CY8CKIT-062S2-43012) (`CY8CKIT-062S2-43012`)
* [PSoC™ 62S1 Wi-Fi Bluetooth® pioneer kit](https://www.infineon.com/CYW9P62S1-43438EVB-01) (`CYW9P62S1-43438EVB-01`)
* [PSoC™ 62S1 Wi-Fi Bluetooth® pioneer kit](https://www.infineon.com/CYW9P62S1-43012EVB-01) (`CYW9P62S1-43012EVB-01`)
* [PSoC™ 62S3 Wi-Fi Bluetooth® prototyping kit](https://www.infineon.com/CY8CPROTO-062S3-4343W) (`CY8CPROTO-062S3-4343W`)

## Related resources

| Resources                       | Links                                                                                                                                                      |
| ------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------- |
| ModusToolbox™ Software Training | [link](https://www.dropbox.com/sh/waj898o4o8eccx0/AAB3hBBaIQo2OvJ5-fubGJIha/training-modustoolbox-level1-getting-started-master/Manual/Ch2-Tools.pdf?dl=0) |

## Other resources

Infineon provides a wealth of data at [www.infineon.com](http://www.infineon.com) to help you select the right device, and quickly and effectively integrate it into your design.

## Document history

Document title: *BILL\_MTB-110* – LED Brightness using PWM via PDL<br>

<table><thead><tr><th width="149">Version</th><th>Description of change</th></tr></thead><tbody><tr><td>1.0.0</td><td>Lab 110: Learn basic GPIO of controlling LED brightness using PWM via  Peripheral Driver Library (PDL) on a PSoC 6 microcontroller.</td></tr></tbody></table>

## Authors:

* *Assoc. Prof. Wiroon Sriborrirux*
* *Mr. Sriengchhun Chheang*
* *Mr. Sabol Socare*<br>

<br>

***

© BDH Corporation, 2022-2023


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.aic-eec.com/embedded-systems/enbedded-system-development-via-psoc6/basic-mcu-interfacing/psoc-tm-6s2-peripherals-interfacing-adc-pwm/psoc-tm-6s2-pwm-and-tcpwm/psoc-tm-6s2-for-pmw-function-labs/led-brightness-using-pwm-via-pdl.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.