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124 lines
3.7 KiB
C
124 lines
3.7 KiB
C
/**
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******************************************************************************
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* @addtogroup PIOS PIOS Core hardware abstraction layer
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* @{
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* @addtogroup PIOS_SERVO RC Servo Functions
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* @brief Code to do set RC servo output
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* @{
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*
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* @file pios_buzzer.c
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* @author The OpenPilot Team, http://www.openpilot.org Copyright (C) 2010.
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* @brief Buzzer routines (STM32 dependent)
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* @see The GNU Public License (GPL) Version 3
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*
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*****************************************************************************/
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/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/* Project Includes */
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#include "pios.h"
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#include "pios_buzzer_priv.h"
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/* Private Function Prototypes */
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uint16_t current_frequency;
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uint16_t intervals[12] = { 57334, 54116, 51079, 48212, 45506, 42952, 40541, 38266, 36118, 34091, 32178, 30372 };
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/**
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* Initialise Servos
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*/
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void PIOS_Buzzer_Init(void)
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{
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#if defined(PIOS_INCLUDE_BUZZER)
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GPIO_InitTypeDef GPIO_InitStructure = pios_buzzer_cfg.gpio_init;
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TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure = pios_buzzer_cfg.tim_base_init;
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TIM_OCInitTypeDef TIM_OCInitStructure = pios_buzzer_cfg.tim_oc_init;
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/* Enable GPIO */
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GPIO_Init(pios_buzzer_cfg.port, &GPIO_InitStructure);
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GPIO_PinAFConfig(pios_buzzer_cfg.port, pios_buzzer_cfg.pin_source, pios_buzzer_cfg.af);
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/* Enable time base */
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TIM_TimeBaseInit(pios_buzzer_cfg.timer, &TIM_TimeBaseStructure);
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/* Set up for output compare function */
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switch(pios_buzzer_cfg.channel) {
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case TIM_Channel_1:
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TIM_OC1Init(pios_buzzer_cfg.timer, &TIM_OCInitStructure);
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TIM_OC1PreloadConfig(pios_buzzer_cfg.timer, TIM_OCPreload_Enable);
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break;
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case TIM_Channel_2:
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TIM_OC2Init(pios_buzzer_cfg.timer, &TIM_OCInitStructure);
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TIM_OC2PreloadConfig(pios_buzzer_cfg.timer, TIM_OCPreload_Enable);
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break;
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case TIM_Channel_3:
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TIM_OC3Init(pios_buzzer_cfg.timer, &TIM_OCInitStructure);
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TIM_OC3PreloadConfig(pios_buzzer_cfg.timer, TIM_OCPreload_Enable);
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break;
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case TIM_Channel_4:
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TIM_OC4Init(pios_buzzer_cfg.timer, &TIM_OCInitStructure);
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TIM_OC4PreloadConfig(pios_buzzer_cfg.timer, TIM_OCPreload_Enable);
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break;
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}
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TIM_ARRPreloadConfig(pios_buzzer_cfg.timer, ENABLE);
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#endif // PIOS_INCLUDE_BUZZER
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}
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void PIOS_Buzzer_Ctrl(uint8_t enable)
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{
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if (enable)
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{
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TIM_Cmd(pios_buzzer_cfg.timer, ENABLE);
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}
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else
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{
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TIM_Cmd(pios_buzzer_cfg.timer, DISABLE);
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}
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}
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/**
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* Set the PWM freq
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* \param[in] piano note in numbers (MIDI note numbers)
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*/
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void PIOS_Buzzer_SetNote(uint8_t note)
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{
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#if defined(PIOS_INCLUDE_BUZZER)
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uint16_t tim_interval = intervals[note%12] / (1 << note/12);
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TIM_SetAutoreload(pios_buzzer_cfg.timer, tim_interval);
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switch(pios_buzzer_cfg.channel) {
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case TIM_Channel_1:
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TIM_SetCompare1(pios_buzzer_cfg.timer, tim_interval/2);
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break;
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case TIM_Channel_2:
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TIM_SetCompare2(pios_buzzer_cfg.timer, tim_interval/2);
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break;
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case TIM_Channel_3:
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TIM_SetCompare3(pios_buzzer_cfg.timer, tim_interval/2);
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break;
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case TIM_Channel_4:
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TIM_SetCompare4(pios_buzzer_cfg.timer, tim_interval/2);
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break;
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}
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#endif // PIOS_INCLUDE_BUZZER
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}
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