看了芯片手册，把通道换到CH3也不行。

void b_timer_config(uint16_t __pres, uint16_t __period, uint16_t __pulse)

{

    timer_parameter_struct timer_initpara;

    // timer_oc_parameter_struct timer_ocinitpara;

    // timer_break_parameter_struct timer_breakpara;



    rcu_periph_clock_enable(RCU_TIMER0);

    timer_deinit(TIMER0);



    timer_struct_para_init(&timer_initpara);

    timer_initpara.prescaler         = __pres;

    timer_initpara.alignedmode       = TIMER_COUNTER_EDGE;

    timer_initpara.counterdirection  = TIMER_COUNTER_UP;

    timer_initpara.period            = __period;                // 10KHz

    timer_initpara.clockdivision     = TIMER_CKDIV_DIV1;

    timer_initpara.repetitioncounter = 0;

    timer_init(TIMER0, &timer_initpara);



    // timer_channel_output_struct_para_init(&timer_ocinitpara);

    // timer_ocinitpara.outputstate  = TIMER_CCX_DISABLE;

    // timer_ocinitpara.outputnstate = TIMER_CCXN_DISABLE;

    // timer_ocinitpara.ocpolarity   = TIMER_OC_POLARITY_HIGH;

    // timer_ocinitpara.ocnpolarity  = TIMER_OCN_POLARITY_HIGH;

    // timer_ocinitpara.ocidlestate  = TIMER_OC_IDLE_STATE_LOW;

    // timer_ocinitpara.ocnidlestate = TIMER_OCN_IDLE_STATE_LOW;

    // timer_channel_output_config(TIMER14, TIMER_CH_0, &timer_ocinitpara);



    // timer_break_struct_para_init(&timer_breakpara);

    // timer_breakpara.runoffstate      = TIMER_ROS_STATE_ENABLE;

    // timer_breakpara.ideloffstate     = TIMER_IOS_STATE_ENABLE;

    // timer_breakpara.deadtime         = 164;

    // timer_breakpara.breakpolarity    = TIMER_BREAK_POLARITY_LOW;

    // timer_breakpara.outputautostate  = TIMER_OUTAUTO_ENABLE;

    // timer_breakpara.protectmode      = TIMER_CCHP_PROT_OFF;

    // timer_breakpara.breakstate       = TIMER_BREAK_ENABLE;

    // timer_break_config(TIMER0, &timer_breakpara);



    // timer_channel_output_shadow_config(TIMER0, TIMER_CH_3, TIMER_OC_SHADOW_ENABLE);

    timer_channel_output_mode_config(TIMER0, TIMER_CH_3, TIMER_OC_MODE_TIMING);

    timer_channel_output_pulse_value_config(TIMER0, TIMER_CH_3, __pulse);

    nvic_irq_enable(TIMER0_Channel_IRQn, 1);

    timer_interrupt_enable(TIMER0, TIMER_INT_CH3);

    timer_auto_reload_shadow_enable(TIMER0);

    timer_enable(TIMER0);

}



void TIMER0_IRQHandler(void)

{

    static uint8_t status = 0;

    if (SET == timer_interrupt_flag_get(TIMER0, TIMER_INT_FLAG_CH3))

    {

        status++;

        switch (status % 3){

        case 0:

            printf("a\n");

            timer_channel_output_pulse_value_config(TIMER0, TIMER_CH_3, tim[B].idle);

            timer_channel_output_pulse_value_config(TIMER15, TIMER_CH_0, 0);

            break;

        case 1:

            printf("b\n");

            timer_channel_output_pulse_value_config(TIMER0, TIMER_CH_3, tim[B].t_off);

            timer_channel_output_pulse_value_config(TIMER15, TIMER_CH_0, 0);

            break;

        case 2:

            printf("c\n");

            timer_channel_output_pulse_value_config(TIMER0, TIMER_CH_3, tim[B].t_on);

            timer_channel_output_pulse_value_config(TIMER15, TIMER_CH_0, pwm_ch[B].pulse);

            break;

        default:

            break;

        }

        timer_interrupt_flag_clear(TIMER0, TIMER_INT_FLAG_CH3);

    }

}