tm4c123_led.c

/*
 * Copyright (c) 2015 Thomas Roell.  All rights reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to
 * deal with the Software without restriction, including without limitation the
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
 * sell copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 *  1. Redistributions of source code must retain the above copyright notice,
 *     this list of conditions and the following disclaimers.
 *  2. Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimers in the
 *     documentation and/or other materials provided with the distribution.
 *  3. Neither the name of Thomas Roell, nor the names of its contributors
 *     may be used to endorse or promote products derived from this Software
 *     without specific prior written permission.
 *
 * 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 AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
 * CONTRIBUTORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 * WITH THE SOFTWARE.
 */

#include "kitty.h"

typedef struct _tm4c123_led_device_t {
    unsigned int led;
} tm4c123_led_device_t;

static tm4c123_led_device_t tm4c123_led_device;

void tm4c123_led(unsigned int led)
{
    if (tm4c123_led_device.led != led)
    {
	if (tm4c123_led_device.led)
	{
	    armv7m_bitband_peripheral_write(&GPIOF->DATA, tm4c123_led_device.led, 0);
	}

	tm4c123_led_device.led = led;

	if (tm4c123_led_device.led)
	{
	    armv7m_bitband_peripheral_write(&GPIOF->DATA, tm4c123_led_device.led, 1);
	}
    }
}

void tm4c123_led_initialize(void)
{
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOF);

    ROM_GPIOPinTypeGPIOOutput(GPIOF_BASE, GPIO_PIN_1);
    ROM_GPIOPinTypeGPIOOutput(GPIOF_BASE, GPIO_PIN_2);
    ROM_GPIOPinTypeGPIOOutput(GPIOF_BASE, GPIO_PIN_3);
}