基于两块stm32f103c8t6的can通讯交互

CAN通信是一种高效的通信方式，特别适合在工业控制和汽车电子系统中使用。在两块STM32F103C8T6之间进行CAN通信交互，需要以下步骤：

1. 确定CAN总线的波特率和CAN ID：波特率是CAN通信的速度，通常为125Kbps、250Kbps、500Kbps或1Mbps。CAN ID是CAN帧的标识符，用于区分不同的数据类型或设备。

2. 配置CAN硬件：STM32F103C8T6有两个CAN控制器，分别为CAN1和CAN2。需要选择一个CAN控制器，并将其与外部CAN收发器连接。然后，需要配置CAN控制器的时钟、模式、波特率、过滤器等参数。

3. 编写CAN通信程序：可以使用STM32标准库或HAL库来编写CAN通信程序。程序需要初始化CAN控制器，并设置CAN帧的ID、数据、长度等信息。然后，可以发送CAN帧或接收CAN帧，并对接收到的数据进行处理。

4. 进行数据交互：在两个STM32F103C8T6之间进行数据交互时，首先需要确定哪一个设备为发送方，哪一个设备为接收方。发送方将数据打包成CAN帧，并通过CAN总线发送给接收方。接收方接收到CAN帧后，解析其中的数据，进行相应的处理。

需要注意的是，CAN通信需要保证发送方和接收方的CAN ID相同，否则数据无法正常传输。此外，还需要考虑数据的精度、稳定性、实时性等因素，以确保通信的可靠性和稳定性。

相关问题

基于两块stm32f103c8t6的can通讯交互代码例子

以下是基于两块STM32F103C8T6的CAN通讯交互代码例子：

发送端代码：

#include "stm32f10x.h"

CAN_InitTypeDef        CAN_InitStructure;
CAN_FilterInitTypeDef  CAN_FilterInitStructure;
CanTxMsg                TxMessage;

int main(void)
{
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_AFIO, ENABLE);
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_CAN1, ENABLE);
    
    GPIO_InitTypeDef  GPIO_InitStructure;
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOA, &GPIO_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 = ENABLE;
    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 = 6;
    CAN_Init(CAN1, &CAN_InitStructure);

    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 = 0;
    CAN_FilterInitStructure.CAN_FilterActivation = ENABLE;
    CAN_FilterInit(&CAN_FilterInitStructure);

    TxMessage.StdId = 0x01;
    TxMessage.ExtId = 0x01;
    TxMessage.RTR = CAN_RTR_DATA;
    TxMessage.IDE = CAN_ID_STD;
    TxMessage.DLC = 1;
    TxMessage.Data[0] = 0x55;

    while(1)
    {
        CAN_Transmit(CAN1, &TxMessage);
        while(CAN_TransmitStatus(CAN1, 0) == CAN_TxStatus_Failed);
        TxMessage.Data[0] = ~TxMessage.Data[0];
        Delay(1000);
    }
}

void Delay(__IO uint32_t nCount)
{
    for(; nCount != 0; nCount--);
}

接收端代码：

#include "stm32f10x.h"

CAN_InitTypeDef        CAN_InitStructure;
CAN_FilterInitTypeDef  CAN_FilterInitStructure;
CanRxMsg                RxMessage;

int main(void)
{
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB | RCC_APB2Periph_AFIO, ENABLE);
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_CAN1, ENABLE);
    
    GPIO_InitTypeDef  GPIO_InitStructure;
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOB, &GPIO_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 = ENABLE;
    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 = 6;
    CAN_Init(CAN1, &CAN_InitStructure);

    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 = 1;
    CAN_FilterInitStructure.CAN_FilterActivation = ENABLE;
    CAN_FilterInit(&CAN_FilterInitStructure);

    while(1)
    {
        if(CAN_MessagePending(CAN1, CAN_FIFO1) != 0)
        {
            CAN_Receive(CAN1, CAN_FIFO1, &RxMessage);
            if(RxMessage.StdId == 0x01 && RxMessage.IDE == CAN_ID_STD && RxMessage.DLC == 1)
            {
                if(RxMessage.Data[0] == 0x55)
                {
                    GPIO_SetBits(GPIOB, GPIO_Pin_9);
                }
                else
                {
                    GPIO_ResetBits(GPIOB, GPIO_Pin_9);
                }
            }
        }
    }
}

其中，发送端将CAN数据发送给接收端，接收端接收到数据后根据数据的不同就点亮或熄灭LED。请注意，这些代码是基于标准库编写的，因此如果您使用的是HAL库或其他库，代码可能需要进行修改。

帮我用标准库在两块stm32f103c8t6上写一个can通讯板间交互代码

抱歉，作为AI语言模型，我没有实际硬件编程的能力。但是，我可以给您提供一些概念和代码框架，帮助您开始基于标准库在两块stm32f103c8t6上编写CAN通信板间交互代码。

1. 首先，您需要在两块stm32f103c8t6上配置CAN硬件，并初始化CAN控制器。以下是在单个stm32f103c8t6上对CAN控制器进行配置和初始化的示例代码，供您参考：

#include "stm32f10x.h"

void CAN_Config(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;
  CAN_InitTypeDef CAN_InitStructure;

  // GPIO clock enable
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO | RCC_APB2Periph_GPIOB, ENABLE);

  // Configure CAN RX/TX pins
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8 | GPIO_Pin_9;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(GPIOB, &GPIO_InitStructure);

  // CAN clock enable
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_CAN1, ENABLE);

  // CAN configuration
  CAN_InitStructure.CAN_Mode = CAN_Mode_Normal;
  CAN_InitStructure.CAN_SJW = CAN_SJW_1tq;
  CAN_InitStructure.CAN_BS1 = CAN_BS1_8tq;
  CAN_InitStructure.CAN_BS2 = CAN_BS2_3tq;
  CAN_InitStructure.CAN_Prescaler = 16;
  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_Init(CAN1, &CAN_InitStructure);
}

2. 在stm32f103c8t6上使用CAN发送消息。以下是一个简单的CAN发送函数，您可以将其用于发送CAN消息到另一个stm32f103c8t6：

void CAN_SendMsg(uint8_t* data, uint8_t len, uint32_t id)
{
    CAN_MessageTypeDef TxMessage;

    TxMessage.IDE = CAN_ID_EXT; // using extended identifier mode
    TxMessage.DLC = len;
    TxMessage.TransmitGlobalTime = DISABLE; // not using time stamp
    TxMessage.StdId = id; // setting the message ID
    memcpy(TxMessage.Data, data, len);

    // send the message
    CAN_Transmit(CAN1, &TxMessage);
}

3. 在stm32f103c8t6上使用CAN接收消息。以下是一个简单的CAN接收函数，用于接收另一个stm32f103c8t6发送的CAN消息：

void CAN_ReceiveMsg(uint8_t* data, uint8_t* len, uint32_t* id)
{
    CAN_MessageTypeDef RxMessage;

    // wait for a new message to arrive
    while(!CAN_MessagePending(CAN1, CAN_FIFO0));

    // receive the message
    CAN_Receive(CAN1, CAN_FIFO0, &RxMessage);

    // copy the received message to the output parameters
    memcpy(data, RxMessage.Data, RxMessage.DLC);
    *len = RxMessage.DLC;
    *id = RxMessage.StdId;
}

4. 最后，您需要编写代码以在两个stm32f103c8t6之间发送和接收CAN消息。以下是一个简单的示例函数，演示如何在两个stm32f103c8t6上发送和接收CAN消息：

void CAN_Interact(void)
{
    uint8_t tx_data[] = {0x01, 0x02, 0x03};
    uint8_t rx_data[8];
    uint8_t rx_len;
    uint32_t rx_id;

    // configure CAN on both devices
    CAN_Config();

    // send a message from device 1 to device 2
    CAN_SendMsg(tx_data, 3, 0x100);

    // receive the message on device 2
    CAN_ReceiveMsg(rx_data, &rx_len, &rx_id);

    // do something with the received message
    // ...

    // send a response message from device 2 back to device 1
    CAN_SendMsg(rx_data, rx_len, rx_id);

    // receive the response message on device 1
    CAN_ReceiveMsg(tx_data, &rx_len, &rx_id);

    // do something with the received response message
    // ...
}

请注意，以上代码仅提供了一个简单的示例，您需要根据您的实际需求进行修改和扩展。