u16 zhankongbi=0; void Timer0_Init(void) //100微秒@12.000MHz { TMOD &= 0xF0; //设置定时器模式 TMOD |= 0x01; //设置定时器模式 TL0 = 0x9C; //设置定时初始值 TH0 = 0xFF; //设置定时初始值 TF0 = 0; //清除TF0标志 TR0 = 1; //定时器0开始计时 ET0 = 1; //使能定时器0中断 EA=1; } void Timer0_Isr(void) interrupt 1 { TL0 = 0x9C; //设置定时初始值 TH0 = 0xFF; //设置定时初始值 temer0++; if(temer0<=zhankongbi){ P1=1; }else{ P1=0; // 10s 1.5 } if(temer0>=200) temer0=0;

时间: 2023-11-18 17:03:07 浏览: 32

这段代码是关于定时器0的初始化和中断处理函数的代码。在初始化函数Timer0_Init()中，首先设置了定时器模式为模式1，然后设置了定时器的初始值，TL0为0x9C，TH0为0xFF。接着清除了TF0标志位，并使能了定时器0中断和总中断。在中断处理函数Timer0_Isr()中，首先重新设置了定时器的初始值，然后每次进入中断都会对temer0进行递增操作。如果temer0小于等于zhankongbi的值，就将P1口置为高电平；否则将P1口置为低电平。最后，当temer0大于等于200时，将temer0重置为0。

#include "driverlib.h" #define TIMER_PERIOD 8192 void Timer_A0_PWM_Init(void) { Timer_A_outputPWMParam htim = {0}; //P1.2复用输出 GPIO_setAsPeripheralModuleFunctionOutputPin(GPIO_PORT_P1, GPIO_PIN2); //时钟源选为SMCLK = 1048576 HZ htim.clockSource = TIMER_A_CLOCKSOURCE_ACLK; //分频系数设为32 32768HZ htim.clockSourceDivider = TIMER_A_CLOCKSOURCE_DIVIDER_1; //装载值设为8192 - 1 ，周期为0.25s htim.timerPeriod = TIMER_PERIOD - 1; //P1.2 对应 TA0.1 故设为TIMER_A_CAPTURECOMPARE_REGISTER_1 定时器为0 htim.compareRegister = TIMER_A_CAPTURECOMPARE_REGISTER_1; //选择复位置位模式 htim.compareOutputMode = TIMER_A_OUTPUTMODE_RESET_SET; //设置占空比，为5% htim.dutyCycle = TIMER_PERIOD / 20 ; //P1.2 对应 TA0.1 为TIMER_A0_BASE Timer_A_outputPWM(TIMER_A0_BASE, &htim); } void Timer_A1_PWM_Init(void) { Timer_A_outputPWMParam htim = {0}; //P1.3复用输出 GPIO_setAsPeripheralModuleFunctionOutputPin(GPIO_PORT_P1, GPIO_PIN3); //时钟源选为SMCLK = 1048576 HZ htim.clockSource = TIMER_A_CLOCKSOURCE_SMCLK; //分频系数设为32 32768HZ htim.clockSourceDivider = TIMER_A_CLOCKSOURCE_DIVIDER_32; //装载值设为8192 - 1 ，周期为0.25s htim.timerPeriod = TIMER_PERIOD - 1; //P1.3 对应 TA1.1 故设为TIMER_A_CAPTURECOMPARE_REGISTER_1 定时器为1 htim.compareRegister = TIMER_A_CAPTURECOMPARE_REGISTER_1; //选择复位置位模式 htim.compareOutputMode = TIMER_A_OUTPUTMODE_RESET_SET; //设置占空比，为10% htim.dutyCycle = TIMER_PERIOD / 10 ; //P1.3 对应 TA1.1 为TIMER_A1_BASE Timer_A_outputPWM(TIMER_A1_BASE, &htim); }像这样写，把引脚P1.3改为P2.0

如果您想将引脚P1.3更改为P2.0，您需要进行以下更改：在Timer_A1_PWM_Init函数中，将以下行： GPIO_setAsPeripheralModuleFunctionOutputPin(GPIO_PORT_P1, GPIO_PIN3); 更改为： GPIO_setAsPeripheralModuleFunctionOutputPin(GPIO_PORT_P2, GPIO_PIN0); 这将更改引脚配置为P2.0，并且您可以使用Timer_A1来生成PWM信号。

void pwm_capture_timer_config(void) { /* TIMER2 configuration: input capture mode ------------------- the external signal is connected to TIMER2 CH0 pin (PB4) the rising edge is used as active edge the TIMER2 CH0CV is used to compute the frequency value ------------------------------------------------------------ / timer_ic_parameter_struct timer_icinitpara; timer_parameter_struct timer_initpara; rcu_periph_clock_enable(RCU_TIMER0); timer_deinit(TIMER0); / TIMER1 configuration / timer_initpara.prescaler = 119; timer_initpara.alignedmode = TIMER_COUNTER_EDGE; timer_initpara.counterdirection = TIMER_COUNTER_UP; timer_initpara.period = 65535; timer_initpara.clockdivision = TIMER_CKDIV_DIV1; timer_initpara.repetitioncounter = 0; timer_init(TIMER0,&timer_initpara); / TIMER1 configuration / / TIMER1 CH2 input capture configuration / timer_icinitpara.icpolarity = TIMER_IC_POLARITY_FALLING; timer_icinitpara.icselection = TIMER_IC_SELECTION_DIRECTTI; timer_icinitpara.icprescaler = TIMER_IC_PSC_DIV1; timer_icinitpara.icfilter = 0x0; timer_input_capture_config(TIMER0,TIMER_CH_1,&timer_icinitpara); nvic_irq_enable(TIMER0_Channel_IRQn, 1, 1); timer_primary_output_config(TIMER0, ENABLE); / auto-reload preload enable / timer_auto_reload_shadow_enable(TIMER0); / clear channel 0 interrupt bit / timer_interrupt_flag_clear(TIMER0,TIMER_INT_FLAG_CH1); / channel 0 interrupt enable / timer_interrupt_enable(TIMER0,TIMER_INT_CH1); / TIMER1 counter enable */ timer_enable(TIMER0); }

这是一个针对GD32F305芯片的定时器配置函数，主要是用于输入捕获模式。下面是代码的解释： 1. 开启TIMER0时钟 ``` rcu_periph_clock_enable(RCU_TIMER0); ``` 2. 复位TIMER0 ``` timer_deinit(TIMER0); ``` 3. 配置TIMER0的基本参数，包括计数器方向、计数器分频、计数器模式、计数器周期 ``` timer_parameter_struct timer_initpara; timer_initpara.prescaler = 119; timer_initpara.alignedmode = TIMER_COUNTER_EDGE; timer_initpara.counterdirection = TIMER_COUNTER_UP; timer_initpara.period = 65535; timer_initpara.clockdivision = TIMER_CKDIV_DIV1; timer_initpara.repetitioncounter = 0; timer_init(TIMER0,&timer_initpara); ``` 4. 配置TIMER0的输入捕获通道，包括极性、输入捕获选择、预分频和滤波器参数 ``` timer_ic_parameter_struct timer_icinitpara; timer_icinitpara.icpolarity = TIMER_IC_POLARITY_FALLING; timer_icinitpara.icselection = TIMER_IC_SELECTION_DIRECTTI; timer_icinitpara.icprescaler = TIMER_IC_PSC_DIV1; timer_icinitpara.icfilter = 0x0; timer_input_capture_config(TIMER0,TIMER_CH_1,&timer_icinitpara); ``` 5. 配置TIMER0的中断 ``` nvic_irq_enable(TIMER0_Channel_IRQn, 1, 1); timer_primary_output_config(TIMER0, ENABLE); /* auto-reload preload enable */ timer_auto_reload_shadow_enable(TIMER0); /* clear channel 0 interrupt bit */ timer_interrupt_flag_clear(TIMER0,TIMER_INT_FLAG_CH1); /* channel 0 interrupt enable */ timer_interrupt_enable(TIMER0,TIMER_INT_CH1); ``` 6. 开启TIMER0计数 ``` timer_enable(TIMER0); ``` 总体来说，这个函数的作用是配置TIMER0为输入捕获模式，其中TIMER0的计数器值会根据外部信号的变化而变化，以实现计时和计数等功能。其中的nvic_irq_enable函数是用于使能TIMER0的中断，timer_interrupt_enable函数是用于使能TIMER0的输入捕获通道中断。需要注意的是，这个函数只是一个配置函数，需要在调用时传入相应的参数才能实现具体的功能。

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