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21ic问答首页 - GD32H759IMK6使用定时器0的多模式通道进行输入捕获要怎么配置

timer GD32 技术交流 国产芯片 多模式通道

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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  1. void timer0_config(void)
    

  2. {
    

  3.         timer_ic_parameter_struct timer_icinitpara;
    

  4.         timer_parameter_struct timer_initpara;
    


  5. 

  6.         rcu_periph_clock_enable(RCU_TIMER0);
    

  7.         rcu_periph_clock_enable(RCU_SYSCFG);
    


  8. 

  9.         timer_deinit(TIMER0);
    

  10.         /* TIMER0 configuration */
    

  11.         timer_struct_para_init(&timer_initpara);
    

  12.         timer_initpara.prescaler         = 299;
    

  13.         timer_initpara.alignedmode       = TIMER_COUNTER_EDGE;
    

  14.         timer_initpara.counterdirection  = TIMER_COUNTER_UP;
    

  15.         timer_initpara.period            = 65535;
    

  16.         timer_initpara.clockdivision     = TIMER_CKDIV_DIV1;
    

  17.         timer_initpara.repetitioncounter = 0;
    

  18.         timer_init(TIMER0, &timer_initpara);
    


  19. 

  20.         /* TIMER0 configuration */
    

  21.         /* TIMER0 CH1 input capture configuration */
    

  22.         timer_channel_input_struct_para_init(&timer_icinitpara);
    

  23.         timer_icinitpara.icpolarity  = TIMER_IC_POLARITY_RISING;
    

  24.         timer_icinitpara.icselection = TIMER_IC_SELECTION_DIRECTTI;
    

  25.         timer_icinitpara.icprescaler = TIMER_IC_PSC_DIV1;
    

  26.         timer_icinitpara.icfilter    = 0x0;
    


  27. 

  28.         timer_input_capture_config(TIMER0, TIMER_CH_0, &timer_icinitpara);
    

  29.         timer_input_capture_config(TIMER0, TIMER_CH_1, &timer_icinitpara);
    

  30.         timer_input_capture_config(TIMER0, TIMER_CH_2, &timer_icinitpara);
    

  31.         timer_input_capture_config(TIMER0, TIMER_CH_3, &timer_icinitpara);
    

  32.         
    

  33.         
    

  34.         timer_input_capture_config(TIMER0, TIMER_MCH_0, &timer_icinitpara);
    

  35.         timer_input_capture_config(TIMER0, TIMER_MCH_1, &timer_icinitpara);
    

  36.         timer_input_capture_config(TIMER0, TIMER_MCH_2, &timer_icinitpara);
    

  37.         timer_input_capture_config(TIMER0, TIMER_MCH_3, &timer_icinitpara);
    

  38.         
    

  39.         timer_master_slave_mode_config(TIMER0 , TIMER_MASTER_SLAVE_MODE_ENABLE);
    


  40. 

  41.         timer_multi_mode_channel_mode_config(TIMER0,TIMER_MCH_0,TIMER_MCH_MODE_INDEPENDENTLY);
    

  42.         timer_multi_mode_channel_mode_config(TIMER0,TIMER_MCH_1,TIMER_MCH_MODE_INDEPENDENTLY);
    

  43.         timer_multi_mode_channel_mode_config(TIMER0,TIMER_MCH_2,TIMER_MCH_MODE_INDEPENDENTLY);
    

  44.         timer_multi_mode_channel_mode_config(TIMER0,TIMER_MCH_3,TIMER_MCH_MODE_INDEPENDENTLY);
    


  45. 

  46.         timer_input_trigger_source_select(TIMER0,TIMER_SMCFG_TRGSEL_MCI0FEM0);
    

  47.         timer_input_trigger_source_select(TIMER0,TIMER_SMCFG_TRGSEL_MCI1FEM1);
    

  48.         timer_input_trigger_source_select(TIMER0,TIMER_SMCFG_TRGSEL_MCI2FEM2);
    

  49.         timer_input_trigger_source_select(TIMER0,TIMER_SMCFG_TRGSEL_MCI3FEM3);
    


  50. 

  51.         timer_slave_mode_select(TIMER0 , TIMER_SLAVE_MODE_EVENT);
    


  52. 

  53.         /* auto-reload preload enable */
    

  54.         timer_auto_reload_shadow_enable(TIMER0);
    

  55.         /* clear channel 0 interrupt bit */
    

  56.         timer_interrupt_flag_clear(TIMER0, TIMER_INT_FLAG_CH0);
    

  57.         timer_interrupt_flag_clear(TIMER0, TIMER_INT_FLAG_CH1);
    

  58.         timer_interrupt_flag_clear(TIMER0, TIMER_INT_FLAG_CH2);
    

  59.         timer_interrupt_flag_clear(TIMER0, TIMER_INT_FLAG_CH3);
    

  60.         timer_interrupt_flag_clear(TIMER0, TIMER_INT_FLAG_MCH0);
    

  61.         timer_interrupt_flag_clear(TIMER0, TIMER_INT_FLAG_MCH1);
    

  62.         timer_interrupt_flag_clear(TIMER0, TIMER_INT_FLAG_MCH2);
    

  63.         timer_interrupt_flag_clear(TIMER0, TIMER_INT_FLAG_MCH3);
    

  64.         
    

  65.         /* channel 0 interrupt enable */
    

  66.         timer_interrupt_enable(TIMER0, TIMER_INT_CH0);
    

  67.         timer_interrupt_enable(TIMER0, TIMER_INT_CH1);
    

  68.         timer_interrupt_enable(TIMER0, TIMER_INT_CH2);
    

  69.         timer_interrupt_enable(TIMER0, TIMER_INT_CH3);
    

  70.         timer_interrupt_enable(TIMER0, TIMER_INT_MCH0);
    

  71.         timer_interrupt_enable(TIMER0, TIMER_INT_MCH1);
    

  72.         timer_interrupt_enable(TIMER0, TIMER_INT_MCH2);
    

  73.         timer_interrupt_enable(TIMER0, TIMER_INT_MCH3);
    

  74.         
    

  75.         /* TIMER0 counter enable */
    

  76.         timer_enable(TIMER0);
    

  77. }

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