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Separate config from implementation for the STM32 pwm servo driver.

This commit is contained in:
px4dev 2012-10-24 00:55:37 -07:00
parent 2fc1032069
commit 1065118ebc
3 changed files with 160 additions and 57 deletions
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91
apps/drivers/boards/px4fmu/px4fmu_pwm_servo.c Normal file
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@ -0,0 +1,91 @@
/****************************************************************************
*
* Copyright (C) 2012 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 px4fmu_pwm_servo.c
*
* Configuration data for the stm32 pwm_servo driver.
*
* Note that these arrays must always be fully-sized.
*/
#include <stdint.h>
#include <drivers/stm32/drv_pwm_servo.h>
#include <arch/board/board.h>
#include <drivers/drv_pwm_output.h>
#include "chip.h"
#include "up_internal.h"
#include "up_arch.h"
#include "stm32_internal.h"
#include "stm32_gpio.h"
#include "stm32_tim.h"
__EXPORT const struct pwm_servo_timer pwm_timers[PWM_SERVO_MAX_TIMERS] = {
{
.base = STM32_TIM2_BASE,
.clock_register = STM32_RCC_APB1ENR,
.clock_bit = RCC_APB1ENR_TIM2EN,
.clock_freq = STM32_APB1_TIM2_CLKIN
}
};
__EXPORT const struct pwm_servo_channel pwm_channels[PWM_SERVO_MAX_CHANNELS] = {
{
.gpio = GPIO_TIM2_CH1OUT,
.timer_index = 0,
.timer_channel = 1,
.default_value = 1000,
},
{
.gpio = GPIO_TIM2_CH2OUT,
.timer_index = 0,
.timer_channel = 2,
.default_value = 1000,
},
{
.gpio = GPIO_TIM2_CH3OUT,
.timer_index = 0,
.timer_channel = 3,
.default_value = 1000,
},
{
.gpio = GPIO_TIM2_CH4OUT,
.timer_index = 0,
.timer_channel = 4,
.default_value = 1000,
}
};

59
apps/drivers/stm32/drv_pwm_servo.c
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@ -58,6 +58,8 @@
#include <arch/board/board.h>
#include <drivers/drv_pwm_output.h>
#include "drv_pwm_servo.h"
#include "chip.h"
#include "up_internal.h"
#include "up_arch.h"
@ -66,67 +68,10 @@
#include "stm32_gpio.h"
#include "stm32_tim.h"
/* configuration limits */
#define PWM_SERVO_MAX_TIMERS 2
#define PWM_SERVO_MAX_CHANNELS 8
/* default rate (in Hz) of PWM updates */
static uint32_t pwm_update_rate = 50;
/*
* Servo configuration for all of the pins that can be used as
* PWM outputs on FMU.
*/
/* array of timers dedicated to PWM servo use */
static const struct pwm_servo_timer {
uint32_t base;
uint32_t clock_register;
uint32_t clock_bit;
uint32_t clock_freq;
} pwm_timers[] = {
{
.base = STM32_TIM2_BASE,
.clock_register = STM32_RCC_APB1ENR,
.clock_bit = RCC_APB1ENR_TIM2EN,
.clock_freq = STM32_APB1_TIM2_CLKIN
}
};
/* array of channels in logical order */
static const struct pwm_servo_channel {
uint32_t gpio;
uint8_t timer_index;
uint8_t timer_channel;
servo_position_t default_value;
} pwm_channels[] = {
{
.gpio = GPIO_TIM2_CH1OUT,
.timer_index = 0,
.timer_channel = 1,
.default_value = 1000,
},
{
.gpio = GPIO_TIM2_CH2OUT,
.timer_index = 0,
.timer_channel = 2,
.default_value = 1000,
},
{
.gpio = GPIO_TIM2_CH3OUT,
.timer_index = 0,
.timer_channel = 3,
.default_value = 1000,
},
{
.gpio = GPIO_TIM2_CH4OUT,
.timer_index = 0,
.timer_channel = 4,
.default_value = 1000,
}
};
#define REG(_tmr, _reg) (*(volatile uint32_t *)(pwm_timers[_tmr].base + _reg))
#define rCR1(_tmr) REG(_tmr, STM32_GTIM_CR1_OFFSET)

67
apps/drivers/stm32/drv_pwm_servo.h Normal file
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@ -0,0 +1,67 @@
/****************************************************************************
*
* Copyright (C) 2012 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 drv_pwm_servo.h
*
* stm32-specific PWM output data.
*/
#pragma once
#include <drivers/drv_pwm_output.h>
/* configuration limits */
#define PWM_SERVO_MAX_TIMERS 2
#define PWM_SERVO_MAX_CHANNELS 8
/* array of timers dedicated to PWM servo use */
struct pwm_servo_timer {
uint32_t base;
uint32_t clock_register;
uint32_t clock_bit;
uint32_t clock_freq;
};
/* supplied by board-specific code */
__EXPORT extern const struct pwm_servo_timer pwm_timers[PWM_SERVO_MAX_TIMERS];
/* array of channels in logical order */
struct pwm_servo_channel {
uint32_t gpio;
uint8_t timer_index;
uint8_t timer_channel;
servo_position_t default_value;
};
__EXPORT extern const struct pwm_servo_channel pwm_channels[PWM_SERVO_MAX_CHANNELS];