# LED Brightness using PWM via HAL

## L*ab Objective:*

This lab demonstrates the process of controlling LED brightness using PWM via Hardware Abstraction Layer (HAL) 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="https://1856353139-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-MClo3nC-1US0rbK8Qau%2Fuploads%2FjDh47ZcPEZxIigyTdjvN%2Fimage.png?alt=media&#x26;token=a509413f-9172-47c6-b379-d9aae519eaa2" alt=""><figcaption><p>Create Application</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
int main(void)
{
    cy_rslt_t result;
    cyhal_pwm_t pwm_obj;

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

    __enable_irq();

	/* Initialize PWM on the supplied pin and assign a new clock */
    result = cyhal_pwm_init(&pwm_obj, CYBSP_USER_LED, NULL);

	/* Start the PWM output */
	result = cyhal_pwm_start(&pwm_obj);

	while(true){
		for (int i = 100; i >= 0; i--){
			result = cyhal_pwm_set_duty_cycle(&pwm_obj, i, 10000);
			cyhal_system_delay_ms(10);
		}
	}
}
```

{% endcode %}

### Build the Application

<figure><img src="https://1856353139-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-MClo3nC-1US0rbK8Qau%2Fuploads%2Fu1UvN815NDMV6gYNSYLT%2Fimage.png?alt=media&#x26;token=43d9a068-49c2-425c-a88a-cc7b5b187cb3" alt=""><figcaption><p>Build Application</p></figcaption></figure>

### Launching the Application

<figure><img src="https://1856353139-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-MClo3nC-1US0rbK8Qau%2Fuploads%2F8pmvOcmTss6ShyjsnBEG%2Fimage.png?alt=media&#x26;token=83935bea-f354-4985-bebf-d69971f6ea39" alt=""><figcaption><p>Launch Application</p></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="https://1856353139-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-MClo3nC-1US0rbK8Qau%2Fuploads%2FN4e76IF1ahw2YCVN72i7%2Fimage.png?alt=media&#x26;token=8ccebae0-ec96-4c44-9ee8-3669bb7dd0cb" alt="" width="563"><figcaption><p>LED will gradually change intensity (LED Brightness).</p></figcaption></figure>

> #### 🎉 <mark style="color:blue;">Congratulations! You can now complete Lab109</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-109* – LED Brightness using PWM via HAL<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 109: Learn basic GPIO of controlling LED brightness using PWM via Hardware Abstraction Layer (HAL) on a PSoC 6 microcontroller.</td></tr></tbody></table>

## Authors:

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

<br>

***

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