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GD32H759IMK6使用定时器0的多模式通道进行输入捕获要怎么配置

fz的Kevin2025-01-08

本帖最后由 fz的Kevin 于 2025-1-8 15:44 编辑

公司的项目是要使用到GD32H759IMK6中TIMER0的8个通道进行输入捕获100Khz的方波。根据官方例程普通通道CH0、CH1、CH2、CH3能够正常捕获到，但是在使用多模式通道MCH0、MCH1、MCH2、MCH3时无论怎么配置，进入输入捕获中断函数的频率并不是由外部输入决定的，而是随着TIMER0规定的计时周期变化而变化，请教各位大佬有没有相关配置资料，或者思路。目前的配置如下：

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void timer0_config(void)

{

        timer_ic_parameter_struct timer_icinitpara;

        timer_parameter_struct timer_initpara;



        rcu_periph_clock_enable(RCU_TIMER0);

        rcu_periph_clock_enable(RCU_SYSCFG);



        timer_deinit(TIMER0);

        /* TIMER0 configuration */

        timer_struct_para_init(&timer_initpara);

        timer_initpara.prescaler         = 299;

        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);



        /* TIMER0 configuration */

        /* TIMER0 CH1 input capture configuration */

        timer_channel_input_struct_para_init(&timer_icinitpara);

        timer_icinitpara.icpolarity  = TIMER_IC_POLARITY_RISING;

        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_0, &timer_icinitpara);

        timer_input_capture_config(TIMER0, TIMER_CH_1, &timer_icinitpara);

        timer_input_capture_config(TIMER0, TIMER_CH_2, &timer_icinitpara);

        timer_input_capture_config(TIMER0, TIMER_CH_3, &timer_icinitpara);

        

        

        timer_input_capture_config(TIMER0, TIMER_MCH_0, &timer_icinitpara);

        timer_input_capture_config(TIMER0, TIMER_MCH_1, &timer_icinitpara);

        timer_input_capture_config(TIMER0, TIMER_MCH_2, &timer_icinitpara);

        timer_input_capture_config(TIMER0, TIMER_MCH_3, &timer_icinitpara);

        

        timer_master_slave_mode_config(TIMER0 , TIMER_MASTER_SLAVE_MODE_ENABLE);



        timer_multi_mode_channel_mode_config(TIMER0,TIMER_MCH_0,TIMER_MCH_MODE_INDEPENDENTLY);

        timer_multi_mode_channel_mode_config(TIMER0,TIMER_MCH_1,TIMER_MCH_MODE_INDEPENDENTLY);

        timer_multi_mode_channel_mode_config(TIMER0,TIMER_MCH_2,TIMER_MCH_MODE_INDEPENDENTLY);

        timer_multi_mode_channel_mode_config(TIMER0,TIMER_MCH_3,TIMER_MCH_MODE_INDEPENDENTLY);



        timer_input_trigger_source_select(TIMER0,TIMER_SMCFG_TRGSEL_MCI0FEM0);

        timer_input_trigger_source_select(TIMER0,TIMER_SMCFG_TRGSEL_MCI1FEM1);

        timer_input_trigger_source_select(TIMER0,TIMER_SMCFG_TRGSEL_MCI2FEM2);

        timer_input_trigger_source_select(TIMER0,TIMER_SMCFG_TRGSEL_MCI3FEM3);



        timer_slave_mode_select(TIMER0 , TIMER_SLAVE_MODE_EVENT);



        /* auto-reload preload enable */

        timer_auto_reload_shadow_enable(TIMER0);

        /* clear channel 0 interrupt bit */

        timer_interrupt_flag_clear(TIMER0, TIMER_INT_FLAG_CH0);

        timer_interrupt_flag_clear(TIMER0, TIMER_INT_FLAG_CH1);

        timer_interrupt_flag_clear(TIMER0, TIMER_INT_FLAG_CH2);

        timer_interrupt_flag_clear(TIMER0, TIMER_INT_FLAG_CH3);

        timer_interrupt_flag_clear(TIMER0, TIMER_INT_FLAG_MCH0);

        timer_interrupt_flag_clear(TIMER0, TIMER_INT_FLAG_MCH1);

        timer_interrupt_flag_clear(TIMER0, TIMER_INT_FLAG_MCH2);

        timer_interrupt_flag_clear(TIMER0, TIMER_INT_FLAG_MCH3);

        

        /* channel 0 interrupt enable */

        timer_interrupt_enable(TIMER0, TIMER_INT_CH0);

        timer_interrupt_enable(TIMER0, TIMER_INT_CH1);

        timer_interrupt_enable(TIMER0, TIMER_INT_CH2);

        timer_interrupt_enable(TIMER0, TIMER_INT_CH3);

        timer_interrupt_enable(TIMER0, TIMER_INT_MCH0);

        timer_interrupt_enable(TIMER0, TIMER_INT_MCH1);

        timer_interrupt_enable(TIMER0, TIMER_INT_MCH2);

        timer_interrupt_enable(TIMER0, TIMER_INT_MCH3);

        

        /* TIMER0 counter enable */

        timer_enable(TIMER0);

}