问答

[i=s] 本帖最后由 fz的Kevin 于 2025-1-8 15:44 编辑 [/i] 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：[code]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); }[/code]