main.c

/******************************************************************************
* File Name:   main.c
*
* Description: This is the source code for the PSoC 4 MCU TCPWM Interrupt 
*              example for ModusToolbox.
*
* 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
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* of such system or application assumes all risk of such use and in doing
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*******************************************************************************/

#include "cy_pdl.h"
#include "cybsp.h"

/*******************************************************************************
* Macros
*******************************************************************************/
/* Timer period in milliseconds */
#define TIMER_PERIOD_MSEC   1000U

/*******************************************************************************
* Function Name: Timer_Interrupt_Handler
********************************************************************************
* Summary: 
* Handler function for the timer interrupt that simply toggles the LED.
*
* Parameters:
*  None
*
* Return:
*  None
*
*******************************************************************************/
void timer_interrupt_handler(void)
{
    /* Clear the terminal count interrupt */
    Cy_TCPWM_ClearInterrupt(CYBSP_TIMER_HW, CYBSP_TIMER_NUM, CY_TCPWM_INT_ON_TC );

    /* Toggle the LED */
    Cy_GPIO_Inv(CYBSP_USER_LED1_PORT, CYBSP_USER_LED1_NUM);
}

/*******************************************************************************
* Function Name: main
*******************************************************************************
* Summary:
* The main function performs the following actions:
*    1. Initializes the BSP
*    2. Calls the function to set up the TCPWM Counter
*    3. Calls the function to set up the interrupt on terminal count
*
* Parameters:
*  void
*
* Return:
*  int
*
******************************************************************************/
int main(void)
{
    cy_rslt_t result;

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

    /* Initialize the interrupt vector table with the timer interrupt handler
     * address and assign priority.
     */
    cy_stc_sysint_t intrCfg =
    {
        /*.intrSrc =*/ CYBSP_TIMER_IRQ,    /* Interrupt source is Timer interrupt */
        /*.intrPriority =*/ 3UL            /* Interrupt priority is 3 */
    };

    result = Cy_SysInt_Init(&intrCfg, timer_interrupt_handler);
    if(result != CY_SYSINT_SUCCESS)
    {
        CY_ASSERT(0);
    }

    /* Enable Interrupt */
    NVIC_EnableIRQ(intrCfg.intrSrc);

    /* Enable global interrupts */
    __enable_irq();

    /* Initialize the TCPWM component in timer/counter mode. The return value of the
     * function indicates whether the arguments are valid or not.
     */
    result = Cy_TCPWM_Counter_Init(CYBSP_TIMER_HW, CYBSP_TIMER_NUM, &CYBSP_TIMER_config);
    if(result != CY_TCPWM_SUCCESS)
    {
        CY_ASSERT(0);
    }

    Cy_TCPWM_Counter_Enable(CYBSP_TIMER_HW, CYBSP_TIMER_NUM);

    /* Check if the desired interrupt is enabled prior to triggering */
    if (0UL != (CY_TCPWM_INT_ON_TC & Cy_TCPWM_GetInterruptMask(CYBSP_TIMER_HW, CYBSP_TIMER_NUM)))
    {
       Cy_TCPWM_SetInterrupt(CYBSP_TIMER_HW, CYBSP_TIMER_NUM, CY_TCPWM_INT_ON_TC);
    }

    /* Set the timer period in milliseconds. To count N cycles, period should be
     * set to N-1.
     */
    Cy_TCPWM_Counter_SetPeriod(CYBSP_TIMER_HW, CYBSP_TIMER_NUM, TIMER_PERIOD_MSEC-1 );

    /* Trigger a software start on the counter instance. This is required when
     * no other hardware input signal is connected to the component to act as
     * a trigger source.
     */
    Cy_TCPWM_TriggerStart(CYBSP_TIMER_HW, CYBSP_TIMER_MASK);

    for (;;)
    {
    }
}

/* [] END OF FILE */