本来是想做AB相脉冲输出的，最后一步AB相滞后超前90°找不到办法了。只能输出两路脉冲 可控制频率 个数。
主函数调用set_psc即可。
#include "gd32f10x.h" // Device header
#include "Delay.h"
int pulse_count = 0;//脉冲计数值
int Pulse_num = 0;//设定脉冲数
void Encoder_init (void)
{
rcu_periph_clock_enable(RCU_AF);
rcu_periph_clock_enable(RCU_GPIOB);
rcu_periph_clock_enable(RCU_TIMER3);//时钟开启
gpio_pin_remap_config(GPIO_TIMER2_PARTIAL_REMAP, ENABLE); //重映射到TIM2
gpio_pin_remap_config(GPIO_SWJ_SWDPENABLE_REMAP, ENABLE);
gpio_init(GPIOB,GPIO_MODE_AF_PP,GPIO_OSPEED_50MHZ,GPIO_PIN_7); //PB5端口配置
gpio_init(GPIOB,GPIO_MODE_AF_PP,GPIO_OSPEED_50MHZ,GPIO_PIN_6); //PB4端口配置
timer_parameter_struct timer3_init;
timer_oc_parameter_struct timer3_ocintpara; //结构体初始化
timer_deinit(TIMER3);
/* TIMER2 configuration */
timer3_init.prescaler = 107;
timer3_init.alignedmode = TIMER_COUNTER_EDGE;
timer3_init.counterdirection = TIMER_COUNTER_UP;
timer3_init.period = 99; //10kHz
timer3_init.clockdivision = TIMER_CKDIV_DIV1;
timer3_init.repetitioncounter = 0;
timer_init(TIMER3,&timer3_init);
/* CH2 configuration in PWM mode */
timer3_ocintpara.outputstate = TIMER_CCX_ENABLE;
//timer2_ocintpara.outputnstate = TIMER_CCXN_DISABLE;
timer3_ocintpara.ocpolarity = TIMER_OC_POLARITY_HIGH;
//timer2_ocintpara.ocnpolarity = TIMER_OCN_POLARITY_HIGH;
timer3_ocintpara.ocidlestate = TIMER_OC_IDLE_STATE_LOW;
//timer2_ocintpara.ocnidlestate = TIMER_OCN_IDLE_STATE_LOW; //互补输出不需要
timer_channel_output_config(TIMER3,TIMER_CH_1,&timer3_ocintpara); //
timer_channel_output_config(TIMER3,TIMER_CH_0,&timer3_ocintpara); //
timer_channel_output_pulse_value_config(TIMER3,TIMER_CH_0,50);
timer_channel_output_mode_config(TIMER3,TIMER_CH_0,TIMER_OC_MODE_PWM0);
timer_channel_output_shadow_config(TIMER3,TIMER_CH_0,TIMER_OC_SHADOW_DISABLE);
/* CH3 configuration in PWM mode0,duty cycle 50% */
timer_channel_output_pulse_value_config(TIMER3,TIMER_CH_1,50);
timer_channel_output_mode_config(TIMER3,TIMER_CH_1,TIMER_OC_MODE_PWM0);
timer_channel_output_shadow_config(TIMER3,TIMER_CH_1,TIMER_OC_SHADOW_DISABLE);
/*中断*/
nvic_priority_group_set(NVIC_PRIGROUP_PRE2_SUB2);
nvic_irq_enable(TIMER3_IRQn,0,0);
/* auto-reload preload enable */
timer_auto_reload_shadow_enable(TIMER3);
/*enable timer2 interRupt*/
timer_interrupt_enable(TIMER3, TIMER_INT_UP );
/* enable TIMER3 */
timer_enable(TIMER3);
}
/*设定脉冲频率 个数*/
void Set_PSC(int F_HZ , int num)
{
Pulse_num = num;
timer_parameter_struct timer3_init;
long PSC = (1080000 - F_HZ) / F_HZ;
timer3_init.prescaler = PSC;
timer3_init.alignedmode = TIMER_COUNTER_EDGE;
timer3_init.counterdirection = TIMER_COUNTER_UP;
timer3_init.period = 99; //ARR
timer3_init.clockdivision = TIMER_CKDIV_DIV1;
timer3_init.repetitioncounter = 0;
timer_init(TIMER3,&timer3_init);
timer_enable(TIMER3);
}
void TIMER3_IRQHandler(void)
{
if (timer_interrupt_flag_get(TIMER3, TIMER_INT_FLAG_UP)!= 0)
{
// 清除中断标志
timer_interrupt_flag_clear(TIMER3, TIMER_INT_FLAG_UP);
pulse_count++;
if (pulse_count >= (Pulse_num))
{
// 达到目标脉冲个数，停止定时器
timer_disable(TIMER3);
pulse_count = 0;
}
}
}
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版权声明：本文为博主原创文章，遵循 CC 4.0 BY-SA 版权协议，转载请附上原文出处链接和本声明。
原文链接：https://blog.csdn.net/m0_74764636/article/details/145467952
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