GD32F103-TIMER模块

只看该作者 · 2024-3-31 11:56

定时器是一个功能强大的外设。

一般功能：
定时中断，计时器，给定一个时间，到达时间后产生一个中断
定时器输出比较的功能，用于PWM波形的产生，驱动电机
定时器输入捕获，测频率
核心关键参数：
16位计数器
16位预分频器
16位自动重装载寄存器
比如高级定时器0，最大是108M，108M/65536/65536=39.76823……（最大定时时间）

如果你觉得时间不够，还可以使用定时器级联功能，三个定时器级联，就可以定时34万亿年。

只看该作者 · 2024-3-31 11:56

高级/通用/基本
GD32F103只有三个定时器，一个高级Timer0，两个通用Timer1、2

计数模式
向上，向下，中央对齐。

其中中央对齐可以用在SVPWM控制算法中，产生三角载波。

只看该作者 · 2024-3-31 11:56

影子寄存器/缓冲寄存器
预分频寄存器与自动重载寄存器都是有影子寄存器的，只有在下一个周期你更改后的值才会生效。

只看该作者 · 2024-3-31 11:57

问题1
不知道结构体这里为什么会报错？

只看该作者 · 2024-3-31 11:57

解决办法

只看该作者 · 2024-3-31 11:57

定时器-基本定时功能
#include "gd32f10x.h" // Device header

void Timer_Init(void)
{
/* TIMER2 configuration */
timer_parameter_struct Timer_initpara;

rcu_periph_clock_enable(RCU_TIMER2); //使能RCU_TIMER2时钟

timer_deinit(TIMER1);

/* initialize TIMER init parameter struct */
timer_struct_para_init(&Timer_initpara);

Timer_initpara.alignedmode = TIMER_COUNTER_EDGE;
Timer_initpara.clockdivision = TIMER_CKDIV_DIV1;
Timer_initpara.counterdirection = TIMER_COUNTER_UP;
Timer_initpara.period = 10000 - 1;
Timer_initpara.prescaler = 10800 - 1;
Timer_initpara.repetitioncounter = 0;
timer_init(TIMER2, &Timer_initpara);

//手动把更新中断标志位清除一下，避免刚初始化完成就进入中断
timer_interrupt_flag_clear(TIMER2, TIMER_INT_FLAG_UP);

/* TIMER2 channel control update interrupt enable */
timer_interrupt_enable(TIMER2, TIMER_INT_UP);

timer_enable(TIMER2);

/* enable and set key EXTI interrupt to the specified priority */
nvic_priority_group_set(NVIC_PRIGROUP_PRE2_SUB2);
nvic_irq_enable(TIMER2_IRQn, 1U, 1U);

}

//void TIMER2_IRQHandler(void)
//{

// if (timer_interrupt_flag_get(TIMER2, TIMER_INT_FLAG_UP) == SET)
// {
//
// timer_interrupt_flag_clear(TIMER2, TIMER_INT_FLAG_UP);
// }
//}
#include "gd32f10x.h"
#include "gd32f10x_libopt.h"
#include "systick.h"
#include "OLED.h"
#include "Timer.h"

uint16_t Num;

int main(void)
{
OLED_Init();
Timer_Init();

OLED_ShowString(1, 1, "Num:");

while (1)
{
OLED_ShowNum(1, 5, Num, 5);
OLED_ShowNum(2, 5, timer_counter_read(TIMER2), 5);
OLED_ShowNum(3, 5, timer_prescaler_read(TIMER2), 5);
}

}

void TIMER2_IRQHandler(void)
{

if (timer_interrupt_flag_get(TIMER2, TIMER_INT_FLAG_UP) == SET)
{
Num++;
timer_interrupt_flag_clear(TIMER2, TIMER_INT_FLAG_UP);
}
}

只看该作者 · 2024-3-31 11:57

定时器-外部时钟功能
外部时钟，配置输入捕获功能IC

输入捕获结构体
输入捕获引脚时钟、复用时钟、初始化引脚输入上拉模式
输入捕获结构体配置
输入捕获从模式

#include "gd32f10x.h"                // Device header

void Timer_Init(void)
{
/* TIMER1 configuration */
timer_parameter_struct Timer_initpara;
timer_ic_parameter_struct timer_icinitpara;

rcu_periph_clock_enable(RCU_TIMER1); //使能RCU_TIMER1时钟
rcu_periph_clock_enable(RCU_GPIOA);
rcu_periph_clock_enable(RCU_AF);
gpio_init(GPIOA, GPIO_MODE_IPU, GPIO_OSPEED_50MHZ, GPIO_PIN_0);

timer_deinit(TIMER1);

/* initialize TIMER init parameter struct */
timer_struct_para_init(&Timer_initpara);

Timer_initpara.alignedmode = TIMER_COUNTER_EDGE;
Timer_initpara.clockdivision = TIMER_CKDIV_DIV1;
Timer_initpara.counterdirection = TIMER_COUNTER_UP;
Timer_initpara.period = 10 - 1;
Timer_initpara.prescaler = 1 - 1;
Timer_initpara.repetitioncounter = 0;
timer_init(TIMER1, &Timer_initpara);

   /* TIMER1 CH0 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 = 0x00;
timer_input_capture_config(TIMER1, TIMER_CH_0, &timer_icinitpara);

   /* slave mode selection : TIMER1 */
/* TIMER1 input trigger : external trigger connected to CI0 */
timer_input_trigger_source_select(TIMER1,TIMER_SMCFG_TRGSEL_CI0FE0);
timer_slave_mode_select(TIMER1,TIMER_SLAVE_MODE_EXTERNAL0);

//手动把更新中断标志位清除一下，避免刚初始化完成就进入中断
timer_interrupt_flag_clear(TIMER1, TIMER_INT_FLAG_UP);

/* TIMER2 channel control update interrupt enable */
timer_interrupt_enable(TIMER1, TIMER_INT_UP);

timer_enable(TIMER1);

/* enable and set key EXTI interrupt to the specified priority */
nvic_priority_group_set(NVIC_PRIGROUP_PRE2_SUB2);
nvic_irq_enable(TIMER1_IRQn, 1U, 1U);

}

//void TIMER2_IRQHandler(void)
//{

// if (timer_interrupt_flag_get(TIMER2, TIMER_INT_FLAG_UP) == SET)
// {
//
// timer_interrupt_flag_clear(TIMER2, TIMER_INT_FLAG_UP);
// }
//}

只看该作者 · 2024-3-31 11:58

输出比较功能-PWM
输出比较可以通过比较CNT与CCR寄存器值的关系，来对输出电平进行置1、置0或翻转的操作，用于输出一定频率和占空比的PWM波形。

每个高级定时器和通用定时器都拥有4个输出比较通道。

高级定时器的前3个通道额外拥有死区生成和互补输出的功能。

死区时间的插入，确保了通道互补的两路信号不会同时有效。

只看该作者 · 2024-3-31 11:58

只看该作者 · 2024-3-31 11:58

呼吸灯
#include "gd32f10x.h"                // Device header

void PWM_Init(void)
{
//输出比较与定时器初始化结构体
timer_oc_parameter_struct timer_ocintpara;
timer_parameter_struct timer_initpara;

//时钟 TIMER1 GPIOA
rcu_periph_clock_enable(RCU_TIMER1);
rcu_periph_clock_enable(RCU_GPIOA);
rcu_periph_clock_enable(RCU_AF);

//PA1初始化复用推挽输出
gpio_init(GPIOA, GPIO_MODE_AF_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_1);

timer_deinit(TIMER1);

/* TIMER1 参数配置 */
timer_initpara.prescaler       = 10800 - 1;  //PSC
timer_initpara.alignedmode    = TIMER_COUNTER_EDGE;
timer_initpara.counterdirection  = TIMER_COUNTER_UP;
timer_initpara.period          = 100 - 1; //ARR
timer_initpara.clockdivision    = TIMER_CKDIV_DIV1;
timer_initpara.repetitioncounter = 0;
timer_init(TIMER1,&timer_initpara);

//输出比较参数配置
timer_ocintpara.ocpolarity = TIMER_OC_POLARITY_HIGH;//高极性，不反转，REF直接输出
timer_ocintpara.outputstate  = TIMER_CCX_ENABLE;//输出使能
timer_channel_output_config(TIMER1,TIMER_CH_1,&timer_ocintpara);

   /* CH1 configuration in PWM mode1,duty cycle 0% */
timer_channel_output_pulse_value_config(TIMER1,TIMER_CH_1,0);//CCR 占空比
timer_channel_output_mode_config(TIMER1,TIMER_CH_1,TIMER_OC_MODE_PWM0);//PWM模式0 模式1
timer_channel_output_shadow_config(TIMER1,TIMER_CH_1,TIMER_OC_SHADOW_DISABLE);

/* auto-reload preload enable */
timer_auto_reload_shadow_enable(TIMER1);
/* auto-reload preload enable */
timer_enable(TIMER1);
}

void PWM_SetCompare1(uint16_t Compare)
{
timer_channel_output_pulse_value_config(TIMER1,TIMER_CH_1,Compare);
}
#include "gd32f10x.h"
#include "gd32f10x_libopt.h"
#include "systick.h"
#include "OLED.h"
#include "Timer.h"
#include "PWM.h"

uint8_t i;

int main(void)
{
OLED_Init();
PWM_Init();

OLED_ShowString(1, 1, "Duty: %");

while (1)
{
for (i = 0; i <= 100; i++)
{
PWM_SetCompare1(i);
Delay_ms(10);
OLED_ShowNum(1, 6, i, 3);
}
for (i = 0; i <= 100; i++)
{
PWM_SetCompare1(100 - i);
Delay_ms(10);
OLED_ShowNum(1, 6, i, 3);
}

}

}

只看该作者 · 2024-3-31 11:58

输出比较-互补、死区时间、刹车
1.高级定时器只有 TIMER0 四通道定时器

只看该作者 · 2024-3-31 11:59

通过配置互补通道PB13 PA8

只看该作者 · 2024-3-31 11:59

配置刹车PB12

只看该作者 · 2024-3-31 11:59

#include "gd32f10x.h"                // Device header

void PWM_Init(void)
{
//输出比较与定时器初始化结构体刹车结构体
timer_oc_parameter_struct timer_ocintpara;
timer_parameter_struct timer_initpara;
timer_break_parameter_struct timer_breakpara;

//时钟 TIMER0 GPIOA GPIOB
rcu_periph_clock_enable(RCU_TIMER0);
rcu_periph_clock_enable(RCU_GPIOA);
rcu_periph_clock_enable(RCU_GPIOB);
rcu_periph_clock_enable(RCU_AF);

//PA1初始化复用推挽输出
gpio_init(GPIOA, GPIO_MODE_AF_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_8);
//PB13 互补通道初始化复用推挽输出
gpio_init(GPIOB, GPIO_MODE_AF_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_13);
   /* configure PB12(TIMER0 BKIN) as alternate function */
gpio_init(GPIOB, GPIO_MODE_IN_FLOATING, GPIO_OSPEED_50MHZ, GPIO_PIN_12);

timer_deinit(TIMER0);

/* TIMER0 参数配置 */
timer_initpara.prescaler       = 108 - 1;  //PSC
timer_initpara.alignedmode    = TIMER_COUNTER_EDGE;
timer_initpara.counterdirection  = TIMER_COUNTER_UP;
timer_initpara.period          = 600 - 1; //ARR
timer_initpara.clockdivision    = TIMER_CKDIV_DIV1;
timer_initpara.repetitioncounter = 0;
timer_init(TIMER0,&timer_initpara);

//输出比较参数配置
timer_ocintpara.outputstate  = TIMER_CCX_ENABLE;//输出使能
timer_ocintpara.outputnstate = TIMER_CCXN_ENABLE;//互补输出使能
timer_ocintpara.ocpolarity = TIMER_OC_POLARITY_HIGH;//高极性，不反转，REF直接输出
timer_ocintpara.ocnpolarity  = TIMER_OCN_POLARITY_HIGH;
timer_ocintpara.ocidlestate  = TIMER_OC_IDLE_STATE_HIGH;
timer_ocintpara.ocnidlestate = TIMER_OCN_IDLE_STATE_HIGH;

//通道选择
timer_channel_output_config(TIMER0,TIMER_CH_0,&timer_ocintpara);

   /* CH0 configuration in PWM mode1,duty cycle 0% */
timer_channel_output_pulse_value_config(TIMER0,TIMER_CH_0,0);//CCR 占空比
timer_channel_output_mode_config(TIMER0,TIMER_CH_0,TIMER_OC_MODE_PWM0);//PWM模式0 模式1
timer_channel_output_shadow_config(TIMER0,TIMER_CH_0,TIMER_OC_SHADOW_ENABLE);

/* automatic output enable, break, dead time and lock configuration*/
timer_breakpara.runoffstate    = TIMER_ROS_STATE_ENABLE;
timer_breakpara.ideloffstate = TIMER_IOS_STATE_ENABLE ;
timer_breakpara.deadtime       = 164;
timer_breakpara.breakpolarity = TIMER_BREAK_POLARITY_LOW;
timer_breakpara.outputautostate = TIMER_OUTAUTO_ENABLE;
timer_breakpara.protectmode    = TIMER_CCHP_PROT_OFF;
timer_breakpara.breakstate    = TIMER_BREAK_ENABLE;
timer_break_config(TIMER0,&timer_breakpara);

/* auto-reload preload enable */
// timer_auto_reload_shadow_enable(TIMER0);

/* TIMER0 primary output function enable */
timer_primary_output_config(TIMER0,ENABLE);

/* TIMER0 channel control update interrupt enable */
timer_interrupt_enable(TIMER0,TIMER_INT_CMT);
/* TIMER0 break interrupt disable */
timer_interrupt_disable(TIMER0,TIMER_INT_BRK);

nvic_priority_group_set(NVIC_PRIGROUP_PRE1_SUB3);
nvic_irq_enable(TIMER0_TRG_CMT_IRQn, 0, 1);

/* TIMER0 counter enable */
timer_enable(TIMER0);
}

void PWM_SetCompare1(uint16_t Compare)
{
timer_channel_output_pulse_value_config(TIMER0,TIMER_CH_0,Compare);
}

只看该作者 · 2024-3-31 11:59

互补输出：

只看该作者 · 2024-3-31 12:00

死区时间：

只看该作者 · 2024-3-31 12:00

刹车功能

只看该作者 · 2024-7-31 22:26

定时器是微控制器中非常重要的外设，广泛用于生成时间延迟、产生PWM信号、测量时间间隔等功能。