led.c
3.18 KB
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/****************************************************************************
*
* Copyright (c) 2020 PX4 Development Team. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name PX4 nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/**
* @file led.c
*
* LED backend.
*/
#include <px4_platform_common/px4_config.h>
#include <stdbool.h>
#include "chip.h"
#include "stm32_gpio.h"
#include "board_config.h"
#include <nuttx/board.h>
#include <arch/board/board.h>
/*
* Ideally we'd be able to get these from arm_internal.h,
* but since we want to be able to disable the NuttX use
* of leds for system indication at will and there is no
* separate switch, we need to build independent of the
* CONFIG_ARCH_LEDS configuration switch.
*/
__BEGIN_DECLS
extern void led_init(void);
extern void led_on(int led);
extern void led_off(int led);
extern void led_toggle(int led);
__END_DECLS
# define xlat(p) (p)
static uint32_t g_ledmap[] = {
FMU_LED_AMBER, // Indexed by LED_SAFETY (defaulted to an output)
};
__EXPORT void led_init(void)
{
/* Configure LED GPIOs for output */
for (size_t l = 0; l < (sizeof(g_ledmap) / sizeof(g_ledmap[0])); l++) {
if (g_ledmap[l] != 0) {
stm32_configgpio(g_ledmap[l]);
}
}
}
static void phy_set_led(int led, bool state)
{
/* Drive Low to switch on */
if (g_ledmap[led] != 0) {
stm32_gpiowrite(g_ledmap[led], !state);
}
}
static bool phy_get_led(int led)
{
/* If Low it is on */
if (g_ledmap[led] != 0) {
return !stm32_gpioread(g_ledmap[led]);
}
return false;
}
__EXPORT void led_on(int led)
{
phy_set_led(xlat(led), true);
}
__EXPORT void led_off(int led)
{
phy_set_led(xlat(led), false);
}
__EXPORT void led_toggle(int led)
{
phy_set_led(xlat(led), !phy_get_led(xlat(led)));
}