le_app_user_interface.c

/*******************************************************************************
 * File Name: app_user_interface.c
 *
 * Description: Source file for application user interface (LEDs, Buttons) related
 *              functionality
 * Related Document: See Readme.md
 *
 *******************************************************************************
 * Copyright 2021-2024, 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
 *******************************************************************************/
#include "le_app_user_interface.h"
/*******************************************************************************
 *        Variable Definitions
 *******************************************************************************/
#ifdef CYBSP_USER_LED1
/* create PWM object for Alert LED */
cyhal_pwm_t ias_led_pwm;
#endif
/* CYBSP_USER_LED2 is only present on some kits. For those kits,it is used to indicate advertising/connection status */
/* create PWM object for second LED only if it exists */

/*******************************************************************************
 *        External Variable Declarations
 *******************************************************************************/
extern app_bt_adv_conn_mode_t app_bt_adv_conn_state;

#ifdef CYBSP_USER_LED2
cyhal_pwm_t adv_led_pwm;
#endif

/* PWM Duty Cycle of LED's for different states */
enum
{
    LED_ON_DUTY_CYCLE = 0,
    LED_BLINKING_DUTY_CYCLE = 50,
    LED_OFF_DUTY_CYCLE = 100
} led_duty_cycles;

/*******************************************************************************
 *        Function Prototypes
 *******************************************************************************/

/*******************************************************************************
 *        Function Definitions
 *******************************************************************************/
#ifdef CYBSP_USER_LED2
/*******************************************************************************
 * Function Name: adv_led_update
 ********************************************************************************
 *
 * Summary:
 *   This function updates the advertising LED state based on LE advertising/
 *   connection state
 *
 * Parameters:
 *   None
 *
 * Return:
 *   None
 *
 *******************************************************************************/
void adv_led_update(void)
{
    /* CYBSP_USER_LED2 is only present on some kits. For those kits,it is used to indicate advertising/connection status */
#ifdef CYBSP_USER_LED2
    cy_rslt_t cy_result = CY_RSLT_SUCCESS;
    /* Stop the advertising led pwm */
    cyhal_pwm_stop(&adv_led_pwm);

    /* Update LED state based on LE advertising/connection state.
     * LED OFF for no advertisement/connection, LED blinking for advertisement
     * state, and LED ON for connected state  */

    switch (app_bt_adv_conn_state)
    {
    case APP_BT_ADV_OFF_CONN_OFF:
        cy_result = cyhal_pwm_set_duty_cycle(&adv_led_pwm, 0, ADV_LED_PWM_FREQUENCY);
        break;

    case APP_BT_ADV_ON_CONN_OFF:
        cy_result = cyhal_pwm_set_duty_cycle(&adv_led_pwm, LED_BLINKING_DUTY_CYCLE, ADV_LED_PWM_FREQUENCY);
        break;

    case APP_BT_ADV_OFF_CONN_ON:
        cy_result = cyhal_pwm_set_duty_cycle(&adv_led_pwm, 100, ADV_LED_PWM_FREQUENCY);
        break;

    default:
        /* LED OFF for unexpected states */
        cy_result = cyhal_pwm_set_duty_cycle(&adv_led_pwm, 0, ADV_LED_PWM_FREQUENCY);
        break;
    }
    /* Check if update to PWM parameters is successful*/
    if (CY_RSLT_SUCCESS != cy_result)
    {
        printf("Failed to set duty cycle parameters!!");
    }

    cy_result = cyhal_pwm_start(&adv_led_pwm);
    /* Check if PWM started successfully */
    if (CY_RSLT_SUCCESS != cy_result)
    {
        printf("Failed to start PWM !!");
    }
#endif
}
#endif
#ifdef CYBSP_USER_LED1
/*******************************************************************************
 * Function Name: ias_led_update
 ********************************************************************************
 *
 * Summary:
 *   This function updates the IAS alert level LED state based on LE
 *   advertising/connection state
 *
 * Parameters:
 *   None
 *
 * Return:
 *   None
 *
 *******************************************************************************/
void ias_led_update(void)
{
    cy_rslt_t cy_result = CY_RSLT_SUCCESS;
    /* Stop the IAS led pwm */
    cyhal_pwm_stop(&ias_led_pwm);

    /* Update LED based on IAS alert level only when the device is connected */
    if (APP_BT_ADV_OFF_CONN_ON == app_bt_adv_conn_state)
    {
        /* Update LED state based on IAS alert level. LED OFF for low level,
         * LED blinking for mid level, and LED ON for high level  */
        switch (app_ias_alert_level[0])
        {
        case IAS_ALERT_LEVEL_LOW:
            cy_result = cyhal_pwm_set_duty_cycle(&ias_led_pwm, LED_OFF_DUTY_CYCLE, IAS_LED_PWM_FREQUENCY);
            break;

        case IAS_ALERT_LEVEL_MID:
            cy_result = cyhal_pwm_set_duty_cycle(&ias_led_pwm, LED_BLINKING_DUTY_CYCLE, IAS_LED_PWM_FREQUENCY);
            break;

        case IAS_ALERT_LEVEL_HIGH:
            cy_result = cyhal_pwm_set_duty_cycle(&ias_led_pwm, LED_ON_DUTY_CYCLE, IAS_LED_PWM_FREQUENCY);
            break;

        default:
            /* Consider any other level as High alert level */
            cy_result = cyhal_pwm_set_duty_cycle(&ias_led_pwm, LED_ON_DUTY_CYCLE, IAS_LED_PWM_FREQUENCY);
            break;
        }
    }
    else
    {
        /* In case of disconnection, turn off the IAS LED */
        cy_result = cyhal_pwm_set_duty_cycle(&ias_led_pwm, LED_OFF_DUTY_CYCLE, IAS_LED_PWM_FREQUENCY);
    }

    /* Check if update to PWM parameters is successful*/
    if (CY_RSLT_SUCCESS != cy_result)
    {
        printf("Failed to set duty cycle parameters!!");
    }

    cy_result = cyhal_pwm_start(&ias_led_pwm);
    /* Check if PWM started successfully */
    if (CY_RSLT_SUCCESS != cy_result)
    {
        printf("Failed to start PWM !!");
    }
}
#endif

/* [] END OF FILE */