GD32F303 CAN回环正常正常模式不行 TX看不到波形

只看该作者 · 2022-4-19 19:45

搞了个GD32的开发板，用了例程测试一下CAN通讯,发现了在回环模式下可以进入CAN的接收中断，可以看到接收到的数据，但是改成正常模式后，使用CAN分析仪就完全看不到内容，使用示波器查看CAN0_TX这个引脚也看不到信号下面是初始化代码

//CAN 引脚初始化
void can_gpio_config(void)
{
/* enable can clock */
rcu_periph_clock_enable(RCU_CAN0);
rcu_periph_clock_enable(RCU_GPIOD);

/* configure CAN0 GPIO, CAN0_TX(PD1) and CAN0_RX(PD0) */
gpio_init(GPIOD, GPIO_MODE_AF_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_1);

gpio_init(GPIOD, GPIO_MODE_IPU, GPIO_OSPEED_50MHZ, GPIO_PIN_0);

gpio_pin_remap_config(GPIO_CAN_FULL_REMAP,ENABLE);
}

//CAN 控制器初始化
void __can_networking_init(void)
{
can_parameter_struct can_parameter;
can_filter_parameter_struct can_filter;
/* initialize CAN register */
can_deinit(CAN0);

/* initialize CAN */
can_parameter.time_triggered = DISABLE;
can_parameter.auto_bus_off_recovery = DISABLE;
can_parameter.auto_wake_up = DISABLE;
can_parameter.auto_retrans = DISABLE;
can_parameter.rec_fifo_overwrite = DISABLE;
can_parameter.trans_fifo_order = DISABLE;
can_parameter.working_mode = CAN_NORMAL_MODE;//CAN_NORMAL_MODE;
can_parameter.resync_jump_width = CAN_BT_SJW_1TQ;
can_parameter.time_segment_1 = CAN_BT_BS1_6TQ;
can_parameter.time_segment_2 = CAN_BT_BS2_3TQ;
/* baudrate 1Mbps */
can_parameter.prescaler = 6;
can_init(CAN0, &can_parameter);

/* initialize filter */
/* CAN0 filter number */
can_filter.filter_number = 0;

/* initialize filter */
can_filter.filter_mode = CAN_FILTERMODE_MASK;
can_filter.filter_bits = CAN_FILTERBITS_32BIT;
can_filter.filter_list_high = 0x0000;
can_filter.filter_list_low = 0x0000;
can_filter.filter_mask_high = 0x0000;
can_filter.filter_mask_low = 0x0000;
can_filter.filter_fifo_number = CAN_FIFO0;
can_filter.filter_enable = ENABLE;
can_filter_init(&can_filter);
}