main.c

/******************************************************************************
* File Name:   main.c
*
* Description: This is the source code for the RutDevKit-USB_CDC_Test
*              Application for ModusToolbox.
*
* Related Document: See README.md
*
*
*  Created on: 2021-06-01
*  Company: Rutronik Elektronische Bauelemente GmbH
*  Address: Jonavos g. 30, Kaunas 44262, Lithuania
*  Author: GDR
*
*******************************************************************************
* (c) 2019-2021, 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
* subsidiaries ("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.
*
* Rutronik Elektronische Bauelemente GmbH Disclaimer: The evaluation board
* including the software is for testing purposes only and,
* because it has limited functions and limited resilience, is not suitable
* for permanent use under real conditions. If the evaluation board is
* nevertheless used under real conditions, this is done at one’s responsibility;
* any liability of Rutronik is insofar excluded
*******************************************************************************/

#include "cy_pdl.h"
#include "cyhal.h"
#include "cybsp.h"
#include "cycfg.h"
#include "cy_usb_dev.h"
#include "cycfg_usbdev.h"

#include "bgt60tr13c.h"

#include <stdlib.h>

/*******************************************************************************
* Macros
********************************************************************************/
#define USBUART_BUFFER_SIZE (64u)
#define USBUART_COM_PORT    (0U)

/*******************************************************************************
* Function Prototypes
********************************************************************************/
static void usb_high_isr(void);
static void usb_medium_isr(void);
static void usb_low_isr(void);
void handle_error(void);

/*******************************************************************************
* Global Variables
********************************************************************************/
/* USB Interrupt Configuration */
const cy_stc_sysint_t usb_high_interrupt_cfg =
{
    .intrSrc = (IRQn_Type) usb_interrupt_hi_IRQn,
    .intrPriority = 5U,
};
const cy_stc_sysint_t usb_medium_interrupt_cfg =
{
    .intrSrc = (IRQn_Type) usb_interrupt_med_IRQn,
    .intrPriority = 6U,
};
const cy_stc_sysint_t usb_low_interrupt_cfg =
{
    .intrSrc = (IRQn_Type) usb_interrupt_lo_IRQn,
    .intrPriority = 7U,
};

/* USBDEV context variables */
cy_stc_usbfs_dev_drv_context_t  usb_drvContext;
cy_stc_usb_dev_context_t        usb_devContext;
cy_stc_usb_dev_cdc_context_t    usb_cdcContext;

uint16_t send_data = 0;


static bool user_pressed_measure_toggle_button(void)
{
	static uint16_t history = 0;
	bool retval = false;

	bool gpio_status = cyhal_gpio_read(USER_BTN1); // Button pressed: gpio_status = 0
	bool button_status = !gpio_status;

	if (button_status)
	{
		history++;
		if (history == 100)
		{
			retval = true;
		}
		if (history > 100)
		{
			// Avoid overflow
			history = 100;
		}
	}
	else history = 0;

	return retval;
}


/*******************************************************************************
* Function Name: main
********************************************************************************
* Summary:
*  This is the main function for CM4 CPU. It initializes the USB Device block
*  and enumerates as a CDC device. It constantly checks for data received from
*  host and echos it back.
*
* Parameters:
*  void
*
* Return:
*  int
*
*******************************************************************************/
int main(void)
{
    cy_rslt_t result;

    uint16_t * samples = malloc(bgt60tr13c_get_samples_per_frame() * sizeof(uint16_t));

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

    /* Enable global interrupts */
    __enable_irq();

    /* init buttons */
    result = cyhal_gpio_init(USER_BTN1, CYHAL_GPIO_DIR_INPUT, CYHAL_GPIO_DRIVE_NONE, false);
	if (result != CY_RSLT_SUCCESS)
	{CY_ASSERT(0);}

    /*Initialize LEDs*/
    result = cyhal_gpio_init( LED1, CYHAL_GPIO_DIR_OUTPUT, CYHAL_GPIO_DRIVE_STRONG, CYBSP_LED_STATE_OFF);
    if (result != CY_RSLT_SUCCESS)
    {handle_error();}
    result = cyhal_gpio_init( LED2, CYHAL_GPIO_DIR_OUTPUT, CYHAL_GPIO_DRIVE_STRONG, CYBSP_LED_STATE_OFF);
    if (result != CY_RSLT_SUCCESS)
    {handle_error();}

    /* Initialize the USB device */
    Cy_USB_Dev_Init(USB_DEV_HW, &USB_DEV_config, &usb_drvContext,
                    &usb_devices[0], &usb_devConfig, &usb_devContext);

    /* Initialize the CDC Class */
    Cy_USB_Dev_CDC_Init(&usb_cdcConfig, &usb_cdcContext, &usb_devContext);

    /* Initialize the USB interrupts */
    Cy_SysInt_Init(&usb_high_interrupt_cfg,   &usb_high_isr);
    Cy_SysInt_Init(&usb_medium_interrupt_cfg, &usb_medium_isr);
    Cy_SysInt_Init(&usb_low_interrupt_cfg,    &usb_low_isr);

    /* Enable the USB interrupts */
    NVIC_EnableIRQ(usb_high_interrupt_cfg.intrSrc);
    NVIC_EnableIRQ(usb_medium_interrupt_cfg.intrSrc);
    NVIC_EnableIRQ(usb_low_interrupt_cfg.intrSrc);

    /* Make device appear on the bus. This function call is blocking,
       it waits till the device enumerates */
    Cy_USB_Dev_Connect(true, CY_USB_DEV_WAIT_FOREVER, &usb_devContext);

    /*Indicate connection*/
    for(int i = 0; i < 10; i++)
    {
    	cyhal_gpio_toggle(LED1);
    	CyDelay(50);
    }
    cyhal_gpio_write(LED1, CYBSP_LED_STATE_ON);

    // Start frame generation
    if (bgt60tr13c_init() != 0)
    {
    	cyhal_gpio_write(LED1, CYBSP_LED_STATE_ON);
    	cyhal_gpio_write(LED2, CYBSP_LED_STATE_ON);
    	for(;;){}
    }

    cyhal_gpio_write(LED1, CYBSP_LED_STATE_OFF);
    cyhal_gpio_write(LED2, CYBSP_LED_STATE_OFF);


    for(;;)
    {
		if (user_pressed_measure_toggle_button())
		{
			if (send_data) send_data = 0;
			else send_data = 1;
		}


    	// Read and send over USB
    	if (bgt60tr13c_is_data_available())
    	{
    		int read_retval = bgt60tr13c_get_data(samples);
    		if (read_retval == 0)
    		{
    			// Send over USB
    			// Maximum 64 bytes per sending
    			uint8_t* addr = (uint8_t*)samples;
    			uint16_t remaining = bgt60tr13c_get_samples_per_frame() * sizeof(uint16_t);

    			if (send_data)
    			{
					for(;;)
					{
						uint16_t count = (remaining > 64)? 64 : remaining;

						// Wait until ready
						while (0u == Cy_USB_Dev_CDC_IsReady(USBUART_COM_PORT, &usb_cdcContext))
						{
						}

						Cy_USB_Dev_CDC_PutData(USBUART_COM_PORT, addr, count, &usb_cdcContext);

						// Increment pointer addr
						addr += count;
						remaining -= count;
						if (remaining == 0) break;
					}
    			}
    		}


    		cyhal_gpio_toggle(LED1);
    	}
    }
}

/***************************************************************************
* Function Name: usb_high_isr
********************************************************************************
* Summary:
*  This function processes the high priority USB interrupts.
*
***************************************************************************/
static void usb_high_isr(void)
{
    /* Call interrupt processing */
    Cy_USBFS_Dev_Drv_Interrupt(USB_DEV_HW, Cy_USBFS_Dev_Drv_GetInterruptCauseHi(USB_DEV_HW),
                               &usb_drvContext);
}


/***************************************************************************
* Function Name: usb_medium_isr
********************************************************************************
* Summary:
*  This function processes the medium priority USB interrupts.
*
***************************************************************************/
static void usb_medium_isr(void)
{
    /* Call interrupt processing */
    Cy_USBFS_Dev_Drv_Interrupt(USB_DEV_HW, Cy_USBFS_Dev_Drv_GetInterruptCauseMed(USB_DEV_HW),
                               &usb_drvContext);
}


/***************************************************************************
* Function Name: usb_low_isr
********************************************************************************
* Summary:
*  This function processes the low priority USB interrupts.
*
**************************************************************************/
static void usb_low_isr(void)
{
    /* Call interrupt processing */
    Cy_USBFS_Dev_Drv_Interrupt(USB_DEV_HW, Cy_USBFS_Dev_Drv_GetInterruptCauseLo(USB_DEV_HW),
                               &usb_drvContext);
}

void handle_error(void)
{
     /* Disable all interrupts. */
    __disable_irq();
    cyhal_gpio_write(LED1, CYBSP_LED_STATE_OFF);
    cyhal_gpio_write(LED2, CYBSP_LED_STATE_ON);
    CY_ASSERT(0);
}

/* [] END OF FILE */