mirror of
https://github.com/WeActStudio/ArduinoCore-AT32F4.git
synced 2026-05-21 09:22:01 +00:00
116 lines
3.6 KiB
C
116 lines
3.6 KiB
C
/*
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* MIT License
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* Copyright (c) 2017 - 2022 _VIFEXTech
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include "pwm.h"
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#include "timer.h"
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#include "Arduino.h"
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/**
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* @brief 定时器输出捕获初始化
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* @param TIMx: 定时器地址
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* @param arr: 自动重装值
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* @param psc: 时钟预分频数
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* @param TimerChannel: 定时器通道
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* @retval 无
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*/
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static void TIMx_OCxInit(tmr_type* TIMx, uint32_t arr, uint16_t psc, uint8_t TimerChannel)
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{
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tmr_output_config_type tmr_output_struct;
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Timer_ClockCmd(TIMx, true);
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tmr_base_init(TIMx, arr, psc);
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tmr_cnt_dir_set(TIMx, TMR_COUNT_UP);
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tmr_output_default_para_init(&tmr_output_struct);
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tmr_output_struct.oc_mode = TMR_OUTPUT_CONTROL_PWM_MODE_B;
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tmr_output_struct.oc_polarity = TMR_OUTPUT_ACTIVE_LOW;
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tmr_output_struct.oc_idle_state = TRUE;
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tmr_output_struct.occ_polarity = TMR_OUTPUT_ACTIVE_HIGH;
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tmr_output_struct.occ_idle_state = FALSE;
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tmr_output_struct.oc_output_state = TRUE;
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tmr_output_struct.occ_output_state = TRUE;
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switch(TimerChannel)
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{
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case 1:
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tmr_output_channel_config(TIMx, TMR_SELECT_CHANNEL_1, &tmr_output_struct);
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break;
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case 2:
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tmr_output_channel_config(TIMx, TMR_SELECT_CHANNEL_2, &tmr_output_struct);
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break;
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case 3:
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tmr_output_channel_config(TIMx, TMR_SELECT_CHANNEL_3, &tmr_output_struct);
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break;
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case 4:
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tmr_output_channel_config(TIMx, TMR_SELECT_CHANNEL_4, &tmr_output_struct);
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break;
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default:
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return;
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}
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tmr_output_enable(TIMx, TRUE);
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tmr_counter_enable(TIMx, TRUE);
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}
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/**
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* @brief PWM输出初始化
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* @param Pin:引脚编号
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* @param Resolution: PWM分辨率
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* @param Frequency: PWM频率
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* @retval 引脚对应的定时器通道
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*/
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uint8_t PWM_Init(uint8_t Pin, uint32_t Resolution, uint32_t Frequency)
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{
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uint32_t arr, psc;
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if(!IS_PWM_PIN(Pin))
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{
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return 0;
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}
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if(Resolution == 0 || Frequency == 0 || (Resolution * Frequency) > F_CPU)
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{
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return 0;
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}
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pinMode(Pin, OUTPUT_AF_PP);
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arr = Resolution;
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psc = Timer_GetClockMax(PIN_MAP[Pin].TIMx) / Resolution / Frequency;
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Timer_SetEnable(PIN_MAP[Pin].TIMx, false);
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TIMx_OCxInit(PIN_MAP[Pin].TIMx, arr - 1, psc - 1, PIN_MAP[Pin].TimerChannel);
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return PIN_MAP[Pin].TimerChannel;
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}
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/**
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* @brief 输出PWM信号
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* @param Pin: 引脚编号
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* @param Value: PWM输出值
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* @retval PWM占空比值
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*/
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void PWM_Write(uint8_t Pin, uint32_t Value)
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{
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Timer_SetCompare(PIN_MAP[Pin].TIMx, PIN_MAP[Pin].TimerChannel, Value);
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}
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