LED Brightness using PWM via HAL

Lab 109

Lab Objective:

This lab demonstrates the process of controlling LED brightness using PWM via Hardware Abstraction Layer (HAL) on a PSoC 6 microcontroller.

🔥 Requirements

Resources	Links
Computer	💻
ModusToolbox™ software v3.0 or later	Link
CY8CKIT-062S2-43012 Infineon Board	Link
Technical Report	dropbox

🚩 Let start

Create Application

Create Application

Coding

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

main.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);
		}
	}
}

Build the Application

Build Application

Launching the Application

Launch Application

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

set up USB cable

Result

LED will gradually change intensity (LED Brightness).

🎉 Congratulations! You can now complete Lab109

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 (CY8CKIT-062S2-43012)

• PSoC™ 62S1 Wi-Fi Bluetooth® pioneer kit (CYW9P62S1-43438EVB-01)

• PSoC™ 62S1 Wi-Fi Bluetooth® pioneer kit (CYW9P62S1-43012EVB-01)

• PSoC™ 62S3 Wi-Fi Bluetooth® prototyping kit (CY8CPROTO-062S3-4343W)

Related resources

Resources	Links
ModusToolbox™ Software Training	link

Other resources

Infineon provides a wealth of data at 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

Version	Description of change
1.0.0	Lab 109: Learn basic GPIO of controlling LED brightness using PWM via Hardware Abstraction Layer (HAL) on a PSoC 6 microcontroller.

Authors:

• Assoc. Prof. Wiroon Sriborrirux

• Mr. Sriengchhun Chheang

• Mr. Sabol Socare

---

© BDH Corporation, 2022-2023