main.c

/******************************************************************************
* File Name:   main.c
*
* Description: This is the source code for the XMC MCU: VADC SCAN Example
*              for ModusToolbox. This example shows how to configure ADC for 
*              Continuous Scan mode.ADC result is used to change status of LED on kit.
*
* Related Document: See README.md
*
******************************************************************************
*
* Copyright (c) 2015-2022, Infineon Technologies AG
* All rights reserved.                        
*                                             
* Boost Software License - Version 1.0 - August 17th, 2003
* 
* Permission is hereby granted, free of charge, to any person or organization
* obtaining a copy of the software and accompanying documentation covered by
* this license (the "Software") to use, reproduce, display, distribute,
* execute, and transmit the Software, and to prepare derivative works of the
* Software, and to permit third-parties to whom the Software is furnished to
* do so, all subject to the following:
* 
* The copyright notices in the Software and this entire statement, including
* the above license grant, this restriction and the following disclaimer,
* must be included in all copies of the Software, in whole or in part, and
* all derivative works of the Software, unless such copies or derivative
* works are solely in the form of machine-executable object code generated by
* a source language processor.
* 
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
* SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
* FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*                                                                              
*****************************************************************************/

#include "cybsp.h"
#include "cy_utils.h"
#include "cy_retarget_io.h"

/*******************************************************************************
* Macros
*******************************************************************************/

/* Define macros for XMC12x, XMC13x and XMC14x Boot kits */
#if (UC_SERIES == XMC12) || (UC_SERIES == XMC13) || (UC_SERIES == XMC14)
#define RES_REG_NUMBER                      (10)
#define CHANNEL_NUMBER                      (7U)
#define ADC_CONVERSION_EVENT_HANDLER        VADC_SR0_INTERRUPT_HANDLER
#define INTERRUPT_PRIORITY_NODE_ID          VADC_SR0_IRQN
#endif

/* Define macros for XMC48x, XMC47x and XMC45x Relax kits and for XMC4200 and XMC4400 PLT2GO kits */
#if (UC_FAMILY == XMC4)
    #if (UC_SERIES == XMC48) || (UC_SERIES == XMC47)
    #define CHANNEL_NUMBER                  (5U)
    #else
    #define CHANNEL_NUMBER                  (0U)
    #endif
#define RES_REG_NUMBER                      (4)
#define ADC_CONVERSION_EVENT_HANDLER        VADC_SR2_INTERRUPT_HANDLER
#define INTERRUPT_PRIORITY_NODE_ID          VADC_SR2_IRQN
#endif

#define ADC_MEASUREMENT_ICLASS_NUM          (0U)

/* Define macro to enable/disable printing of debug messages */
#define ENABLE_XMC_DEBUG_PRINT              (0)

#if ENABLE_XMC_DEBUG_PRINT
static bool LED_TOGGLE = false;
#endif

/*******************************************************************************
* Global Variables
*******************************************************************************/

static volatile uint32_t g_result_adc_measurement;

/*******************************************************************************
* Function Name: ADC_CONVERSION_EVENT_HANDLER
********************************************************************************
* Summary:
* This is the interrupt handler function for the ADC after conversion.
*
* Parameters:
*  void
*
* Return:
*  void
*
*******************************************************************************/
void ADC_CONVERSION_EVENT_HANDLER(void)
{
    /*Read out conversion results*/
    g_result_adc_measurement=XMC_VADC_GROUP_GetResult(VADC_GROUP_HW, RES_REG_NUMBER);
    
    #if !(ENABLE_XMC_DEBUG_PRINT)
    /* Prints the result in UART Terminal */
    printf("ADC Result value is %lx \r\n", g_result_adc_measurement);
    #endif
    
    if(g_result_adc_measurement >= 2000)
    {
        /*Compare the result counts  */
        #if (UC_SERIES == XMC12) || (UC_SERIES == XMC13) || (UC_SERIES == XMC14)
        XMC_GPIO_SetOutputLow(CYBSP_USER_LED_PORT, CYBSP_USER_LED_PIN);
        #endif
        #if (UC_SERIES == XMC45) || (UC_SERIES == XMC47) || (UC_SERIES == XMC48) \
            || (UC_SERIES == XMC42) || (UC_SERIES == XMC43) || (UC_SERIES == XMC44)
        XMC_GPIO_SetOutputHigh(CYBSP_USER_LED_PORT, CYBSP_USER_LED_PIN);
        #endif
    }
    else
    {
        #if ENABLE_XMC_DEBUG_PRINT
        if(!LED_TOGGLE)
        {
        printf("LED Toggled\r\n");
        LED_TOGGLE = true;
        }
        #endif

        #if (UC_SERIES == XMC12) || (UC_SERIES == XMC13) || (UC_SERIES == XMC14)
            XMC_GPIO_SetOutputHigh(CYBSP_USER_LED_PORT, CYBSP_USER_LED_PIN);
        #endif
        #if (UC_SERIES == XMC45) || (UC_SERIES == XMC47) || (UC_SERIES == XMC48) \
            || (UC_SERIES == XMC42) || (UC_SERIES == XMC43) || (UC_SERIES == XMC44)
        XMC_GPIO_SetOutputLow(CYBSP_USER_LED_PORT, CYBSP_USER_LED_PIN);
        #endif
    }
}

/*******************************************************************************
* Function Name: main
********************************************************************************
* Summary:
* This is the main function.
* It sets up a VADC for continuous scan using background scan source.
* ADC result is available after conversion is completed inside event handler function.
* ADC result register value is compared inside event handler function 
* On board LED glows high when ADC counts are more than 2000.
*
* Parameters:
*  none
*
* 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 printf retarget */
    cy_retarget_io_init(CYBSP_DEBUG_UART_HW);

    #if ENABLE_XMC_DEBUG_PRINT
    printf("Initialization done\r\n");
    #endif

    /*Add all channels into the Background Request Source Channel Select Register*/
    XMC_VADC_GLOBAL_BackgroundAddChannelToSequence(VADC, VADC_GROUP_NUM, CHANNEL_NUMBER);

    /*Enable Background Continuous Scan Request source IRQ*/
    NVIC_EnableIRQ(INTERRUPT_PRIORITY_NODE_ID);

    /*Generate a load event to start background request source continuous conversion*/
    XMC_VADC_GLOBAL_BackgroundTriggerConversion(VADC);

    while(1);
}
/* [] END OF FILE */