280049C芯片CAN通讯程序设计
时间: 2023-11-10 10:42:58 浏览: 52
很抱歉,我是一名语言模型AI,无法进行编程操作。但是我可以给您提供一些帮助,希望对您有所帮助。
280049C芯片是一种基于ARM Cortex-M0内核的微控制器,它支持CAN总线通信协议。下面是一个简单的CAN通讯程序设计过程:
1. 初始化CAN模块
首先,需要初始化CAN模块,包括设置CAN模块的工作模式、波特率、滤波器等参数。可以使用芯片提供的CAN初始化函数,例如:
CAN_InitTypeDef CAN_InitStructure;
CAN_InitStructure.CAN_TTCM = DISABLE;
CAN_InitStructure.CAN_ABOM = DISABLE;
CAN_InitStructure.CAN_AWUM = DISABLE;
CAN_InitStructure.CAN_NART = ENABLE;
CAN_InitStructure.CAN_RFLM = DISABLE;
CAN_InitStructure.CAN_TXFP = ENABLE;
CAN_InitStructure.CAN_Mode = CAN_Mode_Normal;
CAN_InitStructure.CAN_SJW = CAN_SJW_1tq;
CAN_InitStructure.CAN_BS1 = CAN_BS1_5tq;
CAN_InitStructure.CAN_BS2 = CAN_BS2_2tq;
CAN_InitStructure.CAN_Prescaler = 4;
CAN_Init(CAN1, &CAN_InitStructure);
2. 设置CAN过滤器
在CAN模块初始化完成后,需要设置CAN过滤器以过滤接收到的CAN消息。可以使用芯片提供的CAN过滤器设置函数,例如:
CAN_FilterInitTypeDef CAN_FilterInitStructure;
CAN_FilterInitStructure.CAN_FilterNumber = 0;
CAN_FilterInitStructure.CAN_FilterMode = CAN_FilterMode_IdMask;
CAN_FilterInitStructure.CAN_FilterScale = CAN_FilterScale_32bit;
CAN_FilterInitStructure.CAN_FilterIdHigh = 0x0000;
CAN_FilterInitStructure.CAN_FilterIdLow = 0x0000;
CAN_FilterInitStructure.CAN_FilterMaskIdHigh = 0x0000;
CAN_FilterInitStructure.CAN_FilterMaskIdLow = 0x0000;
CAN_FilterInitStructure.CAN_FilterFIFOAssignment = CAN_Filter_FIFO0;
CAN_FilterInitStructure.CAN_FilterActivation = ENABLE;
CAN_FilterInit(&CAN_FilterInitStructure);
3. 发送CAN消息
可以使用芯片提供的CAN消息发送函数,例如:
CanTxMsg TxMessage;
TxMessage.StdId = 0x321;
TxMessage.ExtId = 0x01;
TxMessage.RTR = 0;
TxMessage.IDE = CAN_ID_STD;
TxMessage.DLC = 2;
TxMessage.Data[0] = 0x01;
TxMessage.Data[1] = 0x02;
CAN_Transmit(CAN1, &TxMessage);
4. 接收CAN消息
可以使用芯片提供的CAN消息接收函数,例如:
CanRxMsg RxMessage;
if (CAN_GetFlagStatus(CAN1, CAN_FLAG_FMP0) != RESET) {
CAN_Receive(CAN1, CAN_FIFO0, &RxMessage);
// 处理接收到的CAN消息
}
以上是一个简单的CAN通讯程序设计过程,具体实现可以根据实际需求进行调整。希望对您有所帮助。