请对配置HC32F4A0芯片的CAN通讯，给出一个例程

当然，我很乐意给你提供一个例程。以下是基于HC32F4A0芯片的CAN通讯例程：

首先，你需要在代码中初始化CAN：

/* 定义CAN_InitStructure结构体并进行初始化 */
CAN_InitTypeDef CAN_InitStructure;
CAN_StructInit(&CAN_InitStructure);

/* 确定CAN通道，波特率和工作模式 */
CAN_InitStructure.CAN_Prescaler = 8;  // 波特率 = 72MHz / (8+1) = 8Mbps
CAN_InitStructure.CAN_Mode = CAN_Mode_Normal;
CAN_InitStructure.CAN_BS1 = CAN_BS1_4tq;
CAN_InitStructure.CAN_BS2 = CAN_BS2_3tq;
CAN_InitStructure.CAN_SJW = CAN_SJW_1tq; // 定义同步跳跃宽度
CAN_InitStructure.CAN_TTCM = DISABLE;
CAN_InitStructure.CAN_ABOM = ENABLE; // 开启总线断电自动恢复模式
CAN_InitStructure.CAN_AWUM = DISABLE;
CAN_InitStructure.CAN_NART = DISABLE;
CAN_InitStructure.CAN_RFLM = DISABLE;
CAN_InitStructure.CAN_TXFP = DISABLE;
CAN_InitStructure.CAN_OverrunAction = CAN_OverrunAction_Overrun;
CAN_InitStructure.CAN_Mode = ENABLE;

CAN_Init(CAN_PORT, &CAN_InitStructure); // 确定CAN模块和CAN_InitStructure结构体

然后，你需要配置CAN的过滤器：

/* 定义CAN_FilterInitStruct结构体并进行初始化 */
CAN_FilterInitTypeDef CAN_FilterInitStruct;
CAN_StructInit(&CAN_FilterInitStruct);

/* 定义CAN通信ID并添加到过滤器 */
CAN_FilterInitStruct.CAN_FilterNumber = 0;
CAN_FilterInitStruct.CAN_FilterMode = CAN_FilterMode_IdMask;
CAN_FilterInitStruct.CAN_FilterScale = CAN_FilterScale_32bit;
CAN_FilterInitStruct.CAN_FilterIdHigh = 0x0000; // 过滤器ID高位
CAN_FilterInitStruct.CAN_FilterIdLow = 0x0000; // 过滤器ID低位
CAN_FilterInitStruct.CAN_FilterMaskIdHigh = 0x0000; // 过滤器掩码ID高位
CAN_FilterInitStruct.CAN_FilterMaskIdLow = 0x0000; // 过滤器掩码ID低位
CAN_FilterInitStruct.CAN_FilterFIFOAssignment = 0; // 过滤器与FIFO分配
CAN_FilterInitStruct.CAN_FilterActivation = ENABLE;

CAN_FilterInit(&CAN_FilterInitStruct); // 过滤器配置完成

最后，你可以开始发送和接收CAN数据：

/* 定义CAN_Msg结构体并进行初始化 */
CanTxMsg CAN_Msg;
CAN_StructInit(&CAN_Msg);

/* 设置CAN信息 */
CAN_Msg.StdId = 0x01;  // 标准ID
CAN_Msg.ExtId = 0x01;  // 扩展ID
CAN_Msg.RTR = CAN_RTR_Data; // 数据帧
CAN_Msg.IDE = CAN_Id_Standard;
CAN_Msg.DLC = 8; // 数据长度

/* 添加CAN数据 */
CAN_Msg.Data[0] = 0x01;
CAN_Msg.Data[1] = 0x02;
CAN_Msg.Data[2] = 0x03;
CAN_Msg.Data[3] = 0x04;
CAN_Msg.Data[4] = 0x05;
CAN_Msg.Data[5] = 0x06;
CAN_Msg.Data[6] = 0x07;
CAN_Msg.Data[7] = 0x08;

/* 发送CAN数据 */
CAN_Transmit(CAN_PORT, &CAN_Msg);

/* 接收CAN数据 */
CanRxMsg CAN_RxMsg;
CAN_Receive(CAN_PORT, CAN_FIFO0, &CAN_RxMsg);

希望这个例程能够帮助到你。