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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

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fz的Kevin|  楼主 | 2025-1-8 11:57 | 只看该作者 回帖奖励 |倒序浏览 |阅读模式
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:
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);
}

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