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GD32F103CBT6如何配置PB0和PB1输出PWM波?

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#include "gd32f10x.h"
#include "gd32f10x_libopt.h"
#include "systick.h"


void T0_init(void)
{
          timer_oc_parameter_struct timer_ocintpara;
    timer_parameter_struct timer_initpara;
    rcu_periph_clock_enable(RCU_GPIOB);
    rcu_periph_clock_enable(RCU_AF);

    gpio_init( GPIOB, GPIO_MODE_AF_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_0);

    rcu_periph_clock_enable(RCU_TIMER0);

    timer_deinit(TIMER0);

    /* TIMER0 configuration */
    timer_initpara.prescaler         =108-1;
    timer_initpara.alignedmode       = TIMER_COUNTER_EDGE;
    timer_initpara.counterdirection  = TIMER_COUNTER_UP;
    timer_initpara.period            = 16000-1;
    timer_initpara.clockdivision     = TIMER_CKDIV_DIV1;
    timer_initpara.repetitioncounter = 0;
    timer_init(TIMER0,&timer_initpara);

    /* CH1 configuration in PWM mode1 */
    timer_ocintpara.ocpolarity   = TIMER_OC_POLARITY_HIGH;
    timer_ocintpara.outputstate  = TIMER_CCX_ENABLE;
    timer_ocintpara.ocnpolarity  = TIMER_OCN_POLARITY_HIGH;
    timer_ocintpara.outputnstate = TIMER_CCXN_DISABLE;
    timer_ocintpara.ocidlestate  = TIMER_OC_IDLE_STATE_LOW;
    timer_ocintpara.ocnidlestate = TIMER_OCN_IDLE_STATE_LOW;

    timer_channel_output_config(TIMER0,TIMER_CH_1,&timer_ocintpara);

    /* CH1 configuration in PWM mode1,duty cycle 25% */
    timer_channel_output_pulse_value_config(TIMER0,TIMER_CH_1,9999);
    timer_channel_output_mode_config(TIMER0,TIMER_CH_1,TIMER_OC_MODE_PWM0);
    timer_channel_output_shadow_config(TIMER0,TIMER_CH_1,TIMER_OC_SHADOW_DISABLE);

        timer_primary_output_config(TIMER0,ENABLE);
    /* auto-reload preload enable */
    timer_auto_reload_shadow_enable(TIMER0);
    /* auto-reload preload enable */
    timer_enable(TIMER0);

}


int main(void)
{
                rcu_ahb_clock_config(RCU_AHB_CKSYS_DIV1);
                systick_config();
                T0_init();
    while(1)
    {

    }

}

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