/**
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* @file pwm.c
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* @author Ethan.Tao (tzj0429@163.com)
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* @brief
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* @version 0.1
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* @date 2020-12-12
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*
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* @copyright Copyright (c)
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*
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*/
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#include "pwm.h"
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static volatile uint32_t timer_outcnt = 0;
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/*****************************************************************************************************
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Timer2 is used to speed cal
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APB1 is 64M ,so Timer2 clock is 64M,after prescaler 480 is 0.1M(10us)
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input pin:
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PA15-CO
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PB4-AO
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PB5-BO
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*****************************************************************************************************/
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static void Timer2Init(void)
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{
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timer_parameter_struct timercontralcfg;
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timer_deinit(TIMER2);
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timercontralcfg.prescaler = 4799; //48Mhz /4800 =0.01Mhz = 100us
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timercontralcfg.alignedmode = TIMER_COUNTER_EDGE;
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timercontralcfg.counterdirection = TIMER_COUNTER_UP;
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timercontralcfg.period = PERIOD_CAP; //100us*10000=1s
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timer_init(TIMER2, &timercontralcfg);
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timer_interrupt_flag_clear(TIMER2, TIMER_INT_UP);
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timer_interrupt_enable(TIMER2, TIMER_INT_UP);
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nvic_irq_enable(TIMER2_IRQn, 1);
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}
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/*****************************************************************************************************
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Timer0 is used to generente PWM
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APB2 is 48M and prescaler is 1,so Timer0 clock is 48M
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output pin:
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PA10-HIN1-TIME0_CH2
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PA9 -HIN2-TIME0_CH1
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PA8 -HIN3-TIME0_CH0
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PB1-LIN1-TIME0_CH2_N
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PB0-LIN2-TIME0_CH0_N
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PA7-LIN3-TIME0_CH0_N
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*****************************************************************************************************/
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static void Timer0Init(void)
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{
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uint16_t Duty = PERIOD_CMP / 10;
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timer_parameter_struct timercontralcfg;
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timer_oc_parameter_struct timeroutcfg[3];
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timer_break_parameter_struct timer_breakpara;
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//config timer0
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timercontralcfg.prescaler = 0; //counter prescaler is 0
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timercontralcfg.alignedmode = TIMER_COUNTER_EDGE; //center align and counter style depend on dir set
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timercontralcfg.counterdirection = TIMER_COUNTER_UP; //counter style is up
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timercontralcfg.clockdivision = TIMER_CKDIV_DIV1; //Timer0 is 64M
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timercontralcfg.period = PERIOD_CMP; // set period(counter value 0~2^15)
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timer_init(TIMER0, &timercontralcfg);
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timeroutcfg[0].ocpolarity = TIMER_OC_POLARITY_HIGH; //channel output polarity is high
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timeroutcfg[0].ocnpolarity = TIMER_OCN_POLARITY_HIGH;
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timeroutcfg[0].outputstate = TIMER_CCX_ENABLE; //channel enable
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timeroutcfg[0].outputnstate = TIMER_CCXN_DISABLE; //channel complementary DISABLE
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timeroutcfg[0].ocidlestate = TIMER_OC_IDLE_STATE_LOW;
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timeroutcfg[0].ocnidlestate = TIMER_OCN_IDLE_STATE_LOW;
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timeroutcfg[1].ocpolarity = TIMER_OC_POLARITY_HIGH; //channel output polarity is high
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timeroutcfg[1].ocnpolarity = TIMER_OCN_POLARITY_HIGH;
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timeroutcfg[1].outputstate = TIMER_CCX_ENABLE; //channel enable
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timeroutcfg[1].outputnstate = TIMER_CCXN_DISABLE; //channel complementary DISABLE
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timeroutcfg[1].ocidlestate = TIMER_OC_IDLE_STATE_LOW;
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timeroutcfg[1].ocnidlestate = TIMER_OCN_IDLE_STATE_LOW;
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timeroutcfg[2].ocpolarity = TIMER_OC_POLARITY_HIGH; //channel output polarity is high
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timeroutcfg[2].ocnpolarity = TIMER_OCN_POLARITY_HIGH;
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timeroutcfg[2].outputstate = TIMER_CCX_ENABLE; //channel enable
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timeroutcfg[2].outputnstate = TIMER_CCXN_DISABLE; //channel complementary DISABLE
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timeroutcfg[2].ocidlestate = TIMER_OC_IDLE_STATE_LOW;
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timeroutcfg[2].ocnidlestate = TIMER_OCN_IDLE_STATE_LOW;
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timer_channel_output_config(TIMER0, TIMER_CH_0, &timeroutcfg[0]);
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timer_channel_output_config(TIMER0, TIMER_CH_1, &timeroutcfg[1]);
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timer_channel_output_config(TIMER0, TIMER_CH_2, &timeroutcfg[2]);
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timer_channel_output_pulse_value_config(TIMER0, TIMER_CH_0, Duty); //set duty
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timer_channel_output_pulse_value_config(TIMER0, TIMER_CH_1, Duty);
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timer_channel_output_pulse_value_config(TIMER0, TIMER_CH_2, Duty);
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timer_channel_output_mode_config(TIMER0, TIMER_CH_0, TIMER_OC_MODE_PWM1); //set pwm1 mode first low then high
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timer_channel_output_mode_config(TIMER0, TIMER_CH_1, TIMER_OC_MODE_PWM1);
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timer_channel_output_mode_config(TIMER0, TIMER_CH_2, TIMER_OC_MODE_PWM1);
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timer_channel_output_shadow_config(TIMER0, TIMER_CH_0, TIMER_OC_SHADOW_ENABLE); //shadow ENable
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timer_channel_output_shadow_config(TIMER0, TIMER_CH_1, TIMER_OC_SHADOW_ENABLE);
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timer_channel_output_shadow_config(TIMER0, TIMER_CH_2, TIMER_OC_SHADOW_ENABLE);
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/* configure TIMER break function */
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timer_break_struct_para_init(&timer_breakpara);
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/* automatic output enable, break, dead time and lock configuration*/
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timer_breakpara.runoffstate = TIMER_ROS_STATE_DISABLE;
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timer_breakpara.ideloffstate = TIMER_IOS_STATE_DISABLE;
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timer_breakpara.deadtime = 255;
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timer_breakpara.breakpolarity = TIMER_BREAK_POLARITY_LOW;
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timer_breakpara.outputautostate = TIMER_OUTAUTO_ENABLE;
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timer_breakpara.protectmode = TIMER_CCHP_PROT_0;
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timer_breakpara.breakstate = TIMER_BREAK_ENABLE;
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timer_break_config(TIMER0, &timer_breakpara);
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timer_primary_output_config(TIMER0, ENABLE);
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timer_auto_reload_shadow_enable(TIMER0);
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}
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void TimerInit(void)
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{
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rcu_periph_clock_enable(RCU_TIMER2);
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rcu_periph_clock_enable(RCU_TIMER0);
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Timer0Init();
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Timer2Init();
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timer_enable(TIMER0);
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}
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void SetPwmDuty(uint16_t ch, uint32_t duty)
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{
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uint32_t duty_temp = (PERIOD_CMP >= duty) ? (PERIOD_CMP - duty) : 0;
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timer_channel_output_pulse_value_config(TIMER0, ch, duty);
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}
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void SetPwmPeriod(uint32_t period)
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{
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TIMER_CAR(TIMER0) = period;
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}
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extern void StartSpeedTime(void)
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{
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timer_enable(TIMER2);
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}
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extern void StopSpeedTime(void)
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{
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timer_disable(TIMER2);
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}
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extern void TIMER2_IRQHandler_CallBack(void)
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{
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timer_outcnt++;
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}
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extern uint32_t GetSpeedTimerOutcnt(void)
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{
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uint32_t rtn = timer_outcnt;
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timer_outcnt = 0;
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return rtn;
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}
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