rt-thread/bsp/apollo2/board/led.c

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/*
* File :_led.c
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2006 - 2017, RT-Thread Development Team
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Change Logs:
* Date Author Notes
* 2017-09-14 Haley the first version
*/
#include <rtthread.h>
#include <rtdevice.h>
#include "board.h"
#define AM_GPIO_LED0 46
#define AM_GPIO_LED1 47
#define AM_GPIO_LED2 48
#define AM_GPIO_LED3 49
/**
* @brief Turns on the requested LED.
*
* @param LEDNum is the LED number for the light to turn on.
*
* This function turns on a single LED.
*
* @return None.
*/
void rt_hw_led_on(rt_uint8_t LEDNum)
{
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#ifdef RT_USING_PIN
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if(LEDNum == 0)
rt_pin_write(AM_GPIO_LED0, PIN_LOW);
else if(LEDNum == 1)
rt_pin_write(AM_GPIO_LED1, PIN_LOW);
else if(LEDNum == 2)
rt_pin_write(AM_GPIO_LED2, PIN_LOW);
else if(LEDNum == 3)
rt_pin_write(AM_GPIO_LED3, PIN_LOW);
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#endif
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}
/**
* @brief Turns off the requested LED.
*
* @param LEDNum is the LED number for the light to turn off.
*
* This function turns off a single LED.
*
* @return None.
*/
void rt_hw_led_off(rt_uint8_t LEDNum)
{
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#ifdef RT_USING_PIN
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if(LEDNum == 0)
rt_pin_write(AM_GPIO_LED0, PIN_HIGH);
else if(LEDNum == 1)
rt_pin_write(AM_GPIO_LED1, PIN_HIGH);
else if(LEDNum == 2)
rt_pin_write(AM_GPIO_LED2, PIN_HIGH);
else if(LEDNum == 3)
rt_pin_write(AM_GPIO_LED3, PIN_HIGH);
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#endif
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}
/**
* @brief Configures the necessary pins for an array of LEDs
*
* @param None.
*
* This function configures a GPIO to drive an LED in a low-power way.
*
* @return None.
*/
int rt_hw_led_init(void)
{
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#ifdef RT_USING_PIN
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#if defined(RT_USING_LED0)
/* config led */
rt_pin_mode(AM_GPIO_LED0, PIN_MODE_OUTPUT);
/* turns off the led */
rt_hw_led_off(0);
#endif /* RT_USING_LED0 */
#if defined(RT_USING_LED1)
/* config led */
rt_pin_mode(AM_GPIO_LED1, PIN_MODE_OUTPUT);
/* turns off the led */
rt_hw_led_off(1);
#endif /* RT_USING_LED1 */
#if defined(RT_USING_LED2)
/* config led */
rt_pin_mode(AM_GPIO_LED2, PIN_MODE_OUTPUT);
/* turns off the led */
rt_hw_led_off(2);
#endif /* RT_USING_LED0 */
#if defined(RT_USING_LED3)
/* config led */
rt_pin_mode(AM_GPIO_LED3, PIN_MODE_OUTPUT);
/* turns off the led */
rt_hw_led_off(3);
#endif /* RT_USING_LED1 */
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#endif
rt_kprintf("led_init!\n");
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return 0;
}
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#ifdef RT_USING_COMPONENTS_INIT
INIT_DEVICE_EXPORT(rt_hw_led_init);
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#endif
#ifdef RT_USING_FINSH
#include <finsh.h>
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void led(rt_uint32_t led, rt_uint32_t state)
{
/* set led status */
switch (state)
{
case 0:
rt_hw_led_off(led);
break;
case 1:
rt_hw_led_on(led);
break;
default:
break;
}
}
FINSH_FUNCTION_EXPORT(led, turn led (0 - 3) on (1) or off (0).)
#endif
/*@}*/