c17c05f8a4
Author: Gregory Nutt <gnutt@nuttx.org>
Run tools/nxsthyle against all files and eliminate as many complaints as is reasonable.
Run tools/rmcr to eliminate all dangling garbage at the end of lines.
Run tools/detab to eliminate all TAB characters from the files.
Author: Bill Gatliff <bgat@billgatliff.com>
configs/omnibusf4: Initial support for the OmnibusF4 family of flight
management units.
"OmnibusF4" is not a product name per se, but rather a design spec
that many product vendors adhere to. The spec defines the major
components, and how those components are wired into the
microcontroller.
Airbot is one such vendor, and they publish a schematic here:
http://bit.ly/obf4pro
Other software that supports the OmnibusF4 family include Betaflight,
iNAV, and many others. PX4 recently added support as well, using their
own, non-upstreamed, bespoke port of NuttX. No code from those
resources is included in this port.
128 lines
4.2 KiB
C
128 lines
4.2 KiB
C
/****************************************************************************
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* configs/omnibusf4/src/stm32_pwm.c
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*
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* Copyright (C) 2019 Bill Gatliff. All rights reserved.
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* Copyright (C) 2011, 2016 Gregory Nutt. All rights reserved.
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* Author: Bill Gatliff <bgat@billgatliff.com>
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <errno.h>
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#include <debug.h>
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#include <string.h>
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#include <limits.h>
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#include <nuttx/drivers/pwm.h>
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#include <arch/board/board.h>
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#include "chip.h"
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#include "up_arch.h"
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#include "stm32_pwm.h"
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#include "omnibusf4.h"
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: stm32_pwm_setup
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*
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* Description:
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*
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* Initialize PWM and register Omnibus F4's TIM2 and TIM3 PWM devices:
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*
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* TIM3 CH3 PB0 S1_OUT
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* TIM3 CH4 PB1 S2_OUT
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* TIM2 CH4 PA3 S3_OUT
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* TIM2 CH3 PA2 S4_OUT
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*
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****************************************************************************/
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int stm32_pwm_setup(void)
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{
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int npwm = 0; /* hardware device enumerator */
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const char *ppwm = NULL; /* pointer to PWM device name */
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struct pwm_lowerhalf_s *pwm = NULL; /* lower-half driver handle */
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/* Initialize TIM2 and TIM3.
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*
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* Ihe underlying STM32 driver "knows" there are up to four channels
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* available for each timer device, so we don't have to do anything
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* special here to export the two channels each that we're
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* interested in. The user will want to avoid the channels that
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* aren't connected to anything, however, or risk death by boredom
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* from resulting non-response.
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*/
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for (npwm = 2; npwm <= 3; npwm++)
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{
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pwm = stm32_pwminitialize(npwm);
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/* If we can't get the lower-half handle, skip and keep going. */
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if (!pwm)
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{
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continue;
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}
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/* Translate the peripheral number to a device name. */
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switch (npwm)
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{
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case 2:
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ppwm = "/dev/pwm2";
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break;
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case 3:
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ppwm = "/dev/pwm3";
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break;
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/* Skip missing names. */
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default:
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continue;
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}
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pwm_register(ppwm, pwm);
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}
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return 0;
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}
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