176 lines
4.6 KiB
C
176 lines
4.6 KiB
C
/****************************************************************************
|
|
* boards/arm/stm32/photon/src/stm32_rgbled.c
|
|
*
|
|
* Licensed to the Apache Software Foundation (ASF) under one or more
|
|
* contributor license agreements. See the NOTICE file distributed with
|
|
* this work for additional information regarding copyright ownership. The
|
|
* ASF licenses this file to you under the Apache License, Version 2.0 (the
|
|
* "License"); you may not use this file except in compliance with the
|
|
* License. You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
* License for the specific language governing permissions and limitations
|
|
* under the License.
|
|
*
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
|
|
#include <errno.h>
|
|
#include <debug.h>
|
|
#include <fcntl.h>
|
|
#include <stdio.h>
|
|
|
|
#include <nuttx/fs/fs.h>
|
|
#include <nuttx/timers/pwm.h>
|
|
#include <nuttx/leds/rgbled.h>
|
|
#include <arch/board/board.h>
|
|
|
|
#include "chip.h"
|
|
#include "arm_internal.h"
|
|
#include "stm32_pwm.h"
|
|
#include "photon.h"
|
|
|
|
/****************************************************************************
|
|
* Pre-processor Definitions
|
|
****************************************************************************/
|
|
|
|
/* Configuration ************************************************************/
|
|
|
|
#define HAVE_RGBLED 1
|
|
|
|
#ifndef CONFIG_PWM
|
|
# undef HAVE_RGBLED
|
|
#endif
|
|
|
|
#ifndef CONFIG_STM32_TIM2
|
|
# undef HAVE_RGBLED
|
|
#endif
|
|
|
|
#ifndef CONFIG_PWM_MULTICHAN
|
|
# undef HAVE_RGBLED
|
|
#endif
|
|
|
|
#ifndef CONFIG_STM32_TIM2_PWM
|
|
# undef HAVE_RGBLED
|
|
#endif
|
|
|
|
#ifndef CONFIG_STM32_TIM2_CHANNEL2
|
|
# undef HAVE_PWM
|
|
#endif
|
|
|
|
#ifndef CONFIG_STM32_TIM2_CHANNEL3
|
|
# undef HAVE_PWM
|
|
#endif
|
|
|
|
#ifndef CONFIG_STM32_TIM2_CHANNEL4
|
|
# undef HAVE_PWM
|
|
#endif
|
|
|
|
#ifdef HAVE_RGBLED
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: stm32_rgbled_setup
|
|
*
|
|
* Description:
|
|
* Initial for support of a connected RGB LED using PWM.
|
|
*
|
|
****************************************************************************/
|
|
|
|
int stm32_rgbled_setup(void)
|
|
{
|
|
static bool initialized = false;
|
|
struct pwm_lowerhalf_s *ledr;
|
|
struct pwm_lowerhalf_s *ledg;
|
|
struct pwm_lowerhalf_s *ledb;
|
|
struct file file;
|
|
int ret;
|
|
|
|
/* Have we already initialized? */
|
|
|
|
if (!initialized)
|
|
{
|
|
/* Call stm32_pwminitialize() to get an instance of the PWM interface */
|
|
|
|
ledr = stm32_pwminitialize(RGBLED_RPWMTIMER);
|
|
if (!ledr)
|
|
{
|
|
lederr("ERROR: Failed to get the STM32 PWM lower half to LEDR\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
ledr->ops->setup(ledr);
|
|
|
|
/* Call stm32_pwminitialize() to get an instance of the PWM interface */
|
|
|
|
ledg = stm32_pwminitialize(RGBLED_GPWMTIMER);
|
|
if (!ledg)
|
|
{
|
|
lederr("ERROR: Failed to get the STM32 PWM lower half to LEDG\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
ledg->ops->setup(ledg);
|
|
|
|
/* Call stm32_pwminitialize() to get an instance of the PWM interface */
|
|
|
|
ledb = stm32_pwminitialize(RGBLED_BPWMTIMER);
|
|
if (!ledb)
|
|
{
|
|
lederr("ERROR: Failed to get the STM32 PWM lower half to LEDB\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
ledb->ops->setup(ledb);
|
|
|
|
/* Register the RGB LED diver at "/dev/rgbled0" */
|
|
|
|
#ifdef CONFIG_PWM_MULTICHAN
|
|
ret = rgbled_register("/dev/rgbled0", ledr, ledg, ledb,
|
|
RGBLED_RPWMCHANNEL, RGBLED_GPWMCHANNEL,
|
|
RGBLED_BPWMCHANNEL);
|
|
#else
|
|
ret = rgbled_register("/dev/rgbled0", ledr, ledg, ledb);
|
|
#endif
|
|
if (ret < 0)
|
|
{
|
|
lederr("ERROR: rgbled_register failed: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = file_open(&file, "/dev/rgbled0", O_WRONLY);
|
|
if (ret < 0)
|
|
{
|
|
lederr("ERROR: open failed: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
/* Initialize led off */
|
|
|
|
file_write(&file, "#000000", 8);
|
|
file_close(&file);
|
|
|
|
/* Now we are initialized */
|
|
|
|
initialized = true;
|
|
}
|
|
|
|
return OK;
|
|
}
|
|
|
|
#else
|
|
# error "HAVE_RGBLED is undefined"
|
|
#endif /* HAVE_RGBLED */
|