那能帮我写一个基于stm32f103c8t6单片机的can通讯回环模式点灯代码么

以下是基于STM32F103C8T6单片机的CAN通讯回环模式点灯代码： ```c #include "stm32f10x.h" #define LED_PIN GPIO_Pin_13 #define LED_PORT GPIOC void GPIO_Configuration(void); void CAN_Configuration(void); void SysTick_Configuration(void); int main(void) { GPIO_Configuration(); CAN_Configuration(); SysTick_Configuration(); while (1) { GPIO_SetBits(LED_PORT, LED_PIN); // 点亮LED Delay(1000); // 延时1秒 GPIO_ResetBits(LED_PORT, LED_PIN); // 熄灭LED Delay(1000); // 延时1秒 } } void GPIO_Configuration(void) { GPIO_InitTypeDef GPIO_InitStructure; RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE); // 使能GPIOC时钟 GPIO_InitStructure.GPIO_Pin = LED_PIN; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(LED_PORT, &GPIO_InitStructure); } void CAN_Configuration(void) { GPIO_InitTypeDef GPIO_InitStructure; CAN_InitTypeDef CAN_InitStructure; CAN_FilterInitTypeDef CAN_FilterInitStructure; NVIC_InitTypeDef NVIC_InitStructure; RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE); // 使能AFIO时钟 RCC_APB1PeriphClockCmd(RCC_APB1Periph_CAN1, ENABLE); // 使能CAN1时钟 // 配置CAN引脚 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11 | GPIO_Pin_12; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIOA, &GPIO_InitStructure); // 初始化CAN CAN_DeInit(CAN1); CAN_StructInit(&CAN_InitStructure); CAN_InitStructure.CAN_TTCM = DISABLE; CAN_InitStructure.CAN_ABOM = DISABLE; CAN_InitStructure.CAN_AWUM = DISABLE; CAN_InitStructure.CAN_NART = DISABLE; CAN_InitStructure.CAN_RFLM = DISABLE; CAN_InitStructure.CAN_TXFP = DISABLE; CAN_InitStructure.CAN_Mode = CAN_Mode_Normal; CAN_InitStructure.CAN_SJW = CAN_SJW_1tq; CAN_InitStructure.CAN_BS1 = CAN_BS1_4tq; CAN_InitStructure.CAN_BS2 = CAN_BS2_3tq; CAN_InitStructure.CAN_Prescaler = 4; // CAN时钟预分频系数为4，得到APB1时钟频率36MHz/(1+1)*4=18MHz CAN_Init(CAN1, &CAN_InitStructure); // 配置CAN过滤器 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_FIFO0; CAN_FilterInitStructure.CAN_FilterActivation = ENABLE; CAN_FilterInit(&CAN_FilterInitStructure); // 配置CAN中断 NVIC_InitStructure.NVIC_IRQChannel = USB_LP_CAN1_RX0_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); // 启动CAN CAN_ITConfig(CAN1, CAN_IT_FMP0, ENABLE); CAN_ITConfig(CAN1, CAN_IT_TME, ENABLE); CAN_ITConfig(CAN1, CAN_IT_EWG, ENABLE); CAN_ITConfig(CAN1, CAN_IT_EPV, ENABLE); CAN_ITConfig(CAN1, CAN_IT_BOF, ENABLE); CAN_ITConfig(CAN1, CAN_IT_LEC, ENABLE); } void SysTick_Configuration(void) { if(SysTick_Config(SystemCoreClock / 1000)) // 配置SysTick定时器 { while(1); } NVIC_SetPriority(SysTick_IRQn, 0x00); // 设置SysTick中断优先级为最高 } void SysTick_Handler(void) { static uint8_t cnt = 0; static CanTxMsg TxMessage; if (cnt++ >= 10) // 每100ms发送一次CAN消息 { cnt = 0; TxMessage.StdId = 0x11; // 标准ID为0x11 TxMessage.ExtId = 0x00; // 扩展ID为0 TxMessage.RTR = CAN_RTR_DATA; // 数据帧 TxMessage.IDE = CAN_ID_STD; // 标准ID TxMessage.DLC = 1; // 数据长度为1字节 TxMessage.Data[0] = 0xFF; // 数据为0xFF CAN_Transmit(CAN1, &TxMessage); // 发送CAN消息 } } void USB_LP_CAN1_RX0_IRQHandler(void) { CanRxMsg RxMessage; CAN_Receive(CAN1, CAN_FIFO0, &RxMessage); // 接收CAN消息 if (RxMessage.StdId == 0x11 && RxMessage.Data[0] == 0xFF) // 判断CAN消息是否为期望的消息 { GPIO_SetBits(LED_PORT, LED_PIN); // 点亮LED } } void Delay(uint32_t nCount) // 简单延时函数 { for(; nCount != 0; nCount--); } ``` 该代码实现了以下功能： 1. 点亮PC13上的LED灯，每隔1秒熄灭一次。 2. 通过CAN1发送标准ID为0x11、数据为0xFF的CAN消息，每隔100ms发送一次。 3. 通过CAN1接收标准ID为0x11、数据为0xFF的CAN消息，并在接收到消息时点亮LED灯。 注意事项： 1. 由于CAN通讯需要连接两个节点，因此需要使用CAN转接板或将另一个STM32F103C8T6单片机作为CAN节点与本单片机连接。 2. 本代码使用的CAN通讯模式为回环模式，即发送的CAN消息会被本节点自动接收并处理，因此只需要连接一个单片机即可测试CAN通讯功能。 3. 本代码使用的CAN时钟预分频系数为4，得到APB1时钟频率36MHz/(1+1)*4=18MHz，如果使用其他预分频系数需要相应调整CAN_InitTypeDef结构体中的CAN_Prescaler成员。