led.c

ECOG bootloader, used to initialized ecog microcontroller

/*=============================================================================
Cyan Technology Limited

FILE - LED.c
    Example eCOG1 application.

DESCRIPTION
    Uses a general purpose timer to control the flashing of LEDs connected 
    to GPIO pins.

MODIFICATION DETAILS
=============================================================================*/



/******************************************************************************
Project level include files.
******************************************************************************/


#include <ecog1.h>
#include <stdio.h>

#include "driver_lib.h"


/******************************************************************************
Include files for public interfaces from other modules.
******************************************************************************/



/******************************************************************************
Declaration of public functions.
******************************************************************************/



/******************************************************************************
Private constants and types.
******************************************************************************/

#define LED0 0
#define LED1 1
#define LED2 2
#define LED3 3


/******************************************************************************
Declaration of static functions.
******************************************************************************/


static void pattern(void);



/******************************************************************************
Global variables.
******************************************************************************/



/******************************************************************************
Module global variables.
******************************************************************************/


static unsigned int do_pattern;



/******************************************************************************
Definition of API functions.
******************************************************************************/


/******************************************************************************
NAME
    main

SYNOPSIS
    int main(int argc, char * argv[])

FUNCTION
    Sit in a loop and call function pattern when the interrupt signals.

RETURNS
    Exit code.
******************************************************************************/

int main(int argc, char * argv[])
{    
    lcd_rst();
    lcd_puts("Example: led");
    printf("\r\n\nExample: led\r\n");
    
    // Start tick timer and enable interrupt
    rg.tim.ctrl_en = TIM_CTRL_EN_CNT1_CNT_MASK;
    rg.tim.int_en1 = TIM_INT_EN1_CNT1_EXP_MASK;
    
    while (1)
    {
        if (1 == do_pattern)
        {
            pattern();
            do_pattern = 0;
        }
    }
    
    return (0);
}



/******************************************************************************
NAME
    tick_handler

SYNOPSIS
    void __irq_entry tick_handler(void)

FUNCTION
    Interrupt handler that signals to user mode code via the do_leds variable.

RETURNS
    Nothing.
******************************************************************************/

void __irq_entry tick_handler(void)
{
    fd.tim.int_clr1.cnt1_exp = 1;
    do_pattern = 1;
}



/******************************************************************************
NAME
    pattern

SYNOPSIS
    static void pattern(void)

FUNCTION
    Put the next pattern on the LEDs and the LCD.

RETURNS
    Nothing.
******************************************************************************/

static void pattern(void)
{
    static unsigned int count;

    count = (count+1) % 16;

    putchar('\r');

    putchar(' ');
    lcd_xy(5, 2);
    if (count & 8)
    {
        gpio_wr(LED3, 0);
        lcd_putc('O');
        putchar('O');
    }
    else
    {
        gpio_wr(LED3, 1);
        lcd_putc('X');
        putchar('X');
    }

    putchar(' ');
    lcd_xy(7, 2);
    if (count & 4)
    {
        gpio_wr(LED2, 0);
        lcd_putc('O');
        putchar('O');
    }
    else
    {
        gpio_wr(LED2, 1);
        lcd_putc('X');
        putchar('X');
    }

    putchar(' ');
    lcd_xy(9, 2);
    if (count & 2)
    {
        gpio_wr(LED1, 0);
        lcd_putc('O');
        putchar('O');
    }
    else
    {
        gpio_wr(LED1, 1);
        lcd_putc('X');
        putchar('X');
    }

    putchar(' ');
    lcd_xy(11, 2);
    if (count & 1)
    {
        gpio_wr(LED0, 0);
        lcd_putc('O');
        putchar('O');
    }
    else
    {
        gpio_wr(LED0, 1);
        lcd_putc('X');
        putchar('X');
    }
}