109 lines
3.0 KiB
C
109 lines
3.0 KiB
C
/****************************************************************************
|
|
* boards/arm/stm32h7/linum-stm32h753bi/src/stm32_pwm.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 <nuttx/timers/pwm.h>
|
|
#include <arch/board/board.h>
|
|
|
|
#include "chip.h"
|
|
#include "arm_internal.h"
|
|
#include "stm32_pwm.h"
|
|
#include "linum-stm32h753bi.h"
|
|
|
|
/****************************************************************************
|
|
* Pre-processor Definitions
|
|
****************************************************************************/
|
|
|
|
/* Configuration ************************************************************/
|
|
|
|
#define HAVE_PWM 1
|
|
|
|
#ifndef CONFIG_PWM
|
|
# undef HAVE_PWM
|
|
#endif
|
|
|
|
#ifndef CONFIG_STM32H7_TIM4
|
|
# undef HAVE_PWM
|
|
#endif
|
|
|
|
#ifndef CONFIG_STM32H7_TIM4_PWM
|
|
# undef HAVE_PWM
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: stm32_pwm_setup
|
|
*
|
|
* Description:
|
|
* Initialize PWM and register the PWM device.
|
|
*
|
|
****************************************************************************/
|
|
|
|
int stm32_pwm_setup(void)
|
|
{
|
|
#ifdef HAVE_PWM
|
|
static bool initialized = false;
|
|
struct pwm_lowerhalf_s *pwm;
|
|
int ret;
|
|
|
|
/* Have we already initialized? */
|
|
|
|
if (!initialized)
|
|
{
|
|
/* Get an instance of the PWM interface */
|
|
|
|
pwm = stm32_pwminitialize(BUZZER_PWMTIMER);
|
|
if (!pwm)
|
|
{
|
|
tmrerr("ERROR: Failed to get the STM32 PWM lower half\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
/* Register the PWM driver at "/dev/pwm0" */
|
|
|
|
ret = pwm_register("/dev/pwm0", pwm);
|
|
if (ret < 0)
|
|
{
|
|
tmrerr("ERROR: pwm_register failed: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
/* Now we are initialized */
|
|
|
|
initialized = true;
|
|
}
|
|
|
|
return OK;
|
|
#else
|
|
return -ENODEV;
|
|
#endif
|
|
}
|