问答

兆易创新官方《GD32F30x_Demo_Suites_V2.4.3》中《22_ENET》的demo程序中tcpip_input(）函数在tcpip.h中申明，tcpip.c中定义，但调用时提示undefined，keil5也无法在头文件中跳转的定义处

参加2022兆易杯研电赛，可免费申请电路板，但只提供了邮箱，技术热线不负责该业务.想咨询申请方式，是否直接发邮件就可以.

各位朋友大家好，我在使用gd32f30x的外部上升沿触发timer1_singlepulse模式时，出现timer1 ch2的pwm输出不规则的问题： 1.应用情况：外部触发频率:100kHz，输出pwm频率：100kHz,占空比3/20. 2.波形：蓝色：外部触发源 紫色：timer1 ch2输出pwm 3.配置代码： timer_initpara.prescaler = 83; timer_initpara.alignedmode = TIMER_COUNTER_EDGE; timer_initpara.counterdirection = TIMER_COUNTER_UP; timer_initpara.period = 19; timer_initpara.clockdivision = TIMER_CKDIV_DIV1; timer_initpara.repetitioncounter = 0; timer_init(TIMER1,&timer_initpara); /* auto-reload preload disable */ timer_auto_reload_shadow_disable(TIMER1); /* CH2 configuration in OC PWM0 mode */ timer_ocinitpara.ocpolarity = TIMER_OC_POLARITY_HIGH; timer_ocinitpara.ocnpolarity = TIMER_OCN_POLARITY_HIGH; timer_ocinitpara.outputstate = TIMER_CCX_ENABLE; timer_ocinitpara.outputnstate = TIMER_CCXN_DISABLE; timer_ocinitpara.ocidlestate = TIMER_OC_IDLE_STATE_LOW; timer_ocinitpara.ocnidlestate = TIMER_OCN_IDLE_STATE_LOW; timer_channel_output_config(TIMER1,TIMER_CH_2,&timer_ocinitpara); timer_channel_output_pulse_value_config(TIMER1,TIMER_CH_2,3); timer_channel_output_mode_config(TIMER1,TIMER_CH_2,TIMER_OC_MODE_PWM0); timer_channel_output_shadow_config(TIMER1,TIMER_CH_2,TIMER_OC_SHADOW_DISABLE); timer_channel_output_fast_config(TIMER1,TIMER_CH_2,TIMER_OC_FAST_ENABLE); /* TIMER1 CH0 input capture configuration */ timer_icinitpara.icpolarity = TIMER_IC_POLARITY_RISING; timer_icinitpara.icselection = TIMER_IC_SELECTION_DIRECTTI; timer_icinitpara.icprescaler = TIMER_IC_PSC_DIV1; timer_icinitpara.icfilter = 0x00; timer_input_capture_config(TIMER1,TIMER_CH_0,&timer_icinitpara); /* single pulse mode selection */ timer_single_pulse_mode_config(TIMER1,TIMER_SP_MODE_SINGLE); /* slave mode selection : TIMER1 */ /* TIMER1 input trigger : external trigger connected to CI0 */ timer_input_trigger_source_select(TIMER1,TIMER_SMCFG_TRGSEL_CI0FE0); timer_slave_mode_select(TIMER1,TIMER_SLAVE_MODE_EVENT);