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led.c
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led.c
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/******************************************************************************
* File Name: led.c
*
* Description: This file contains source code that controls LED.
*
* Related Document: See README.md
*
*******************************************************************************
* Copyright 2020-2023, Cypress Semiconductor Corporation (an Infineon company) or
* an affiliate of Cypress Semiconductor Corporation. All rights reserved.
*
* This software, including source code, documentation and related
* materials ("Software") is owned by Cypress Semiconductor Corporation
* or one of its affiliates ("Cypress") and is protected by and subject to
* worldwide patent protection (United States and foreign),
* United States copyright laws and international treaty provisions.
* Therefore, you may use this Software only as provided in the license
* agreement accompanying the software package from which you
* obtained this Software ("EULA").
* If no EULA applies, Cypress hereby grants you a personal, non-exclusive,
* non-transferable license to copy, modify, and compile the Software
* source code solely for use in connection with Cypress's
* integrated circuit products. Any reproduction, modification, translation,
* compilation, or representation of this Software except as specified
* above is prohibited without the express written permission of Cypress.
*
* Disclaimer: THIS SOFTWARE IS PROVIDED AS-IS, WITH NO WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, NONINFRINGEMENT, IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. Cypress
* reserves the right to make changes to the Software without notice. Cypress
* does not assume any liability arising out of the application or use of the
* Software or any product or circuit described in the Software. Cypress does
* not authorize its products for use in any products where a malfunction or
* failure of the Cypress product may reasonably be expected to result in
* significant property damage, injury or death ("High Risk Product"). By
* including Cypress's product in a High Risk Product, the manufacturer
* of such system or application assumes all risk of such use and in doing
* so agrees to indemnify Cypress against all liability.
*******************************************************************************/
/*******************************************************************************
* Header files includes
*******************************************************************************/
#include "cybsp.h"
#include "cyhal.h"
#include "led.h"
/*******************************************************************************
* Global constants
*******************************************************************************/
#define PWM_LED_FREQ_HZ (1000000lu) /* in Hz */
#define GET_DUTY_CYCLE(x) (100 - x)
/*******************************************************************************
* Global variables
*******************************************************************************/
cyhal_pwm_t pwm_led;
/*******************************************************************************
* Function Name: update_led
********************************************************************************
* Summary:
* This function updates the LED brightness, based on the touch input.
*
* Parameter:
* brightness: LED brightness parameter to update the PWM
*
*******************************************************************************/
void update_led(uint32_t brightness)
{
/* Drive the LED with brightness */
cyhal_pwm_set_duty_cycle(&pwm_led, GET_DUTY_CYCLE(brightness),
PWM_LED_FREQ_HZ);
}
/*******************************************************************************
* Function Name: initialize_led
********************************************************************************
* Summary:
* Initializes TCPWM in PWM mode that is used for driving LED.
*
*******************************************************************************/
cy_rslt_t initialize_led(void)
{
cy_rslt_t rslt;
rslt = cyhal_pwm_init(&pwm_led, CYBSP_USER_LED, NULL);
if (CY_RSLT_SUCCESS == rslt)
{
rslt = cyhal_pwm_set_duty_cycle(&pwm_led,
GET_DUTY_CYCLE(LED_MAX_BRIGHTNESS),
PWM_LED_FREQ_HZ);
if(CY_RSLT_SUCCESS == rslt)
{
rslt = cyhal_pwm_start(&pwm_led);
}
}
return rslt;
}
/* [] END OF FILE */