编写一个针对STM32F103C6T6A的项目,功能是把串口接收到的数据通过CAN发出去,CAN接收到的数据从串口发出去的代码
时间: 2023-08-16 08:09:46 浏览: 56
好的,这是一个比较复杂的项目,需要涉及到串口和CAN的配置,以及数据的收发。以下是一个示例代码,仅供参考:
```c
#include "stm32f10x.h"
#include "stm32f10x_can.h"
#include "stm32f10x_usart.h"
#define CAN_RX_PIN GPIO_Pin_0
#define CAN_TX_PIN GPIO_Pin_1
#define CAN_GPIO_PORT GPIOD
#define CAN_GPIO_CLK RCC_APB2Periph_GPIOD
#define CAN_CLK RCC_APB1Periph_CAN1
#define USART_RX_PIN GPIO_Pin_10
#define USART_TX_PIN GPIO_Pin_9
#define USART_GPIO_PORT GPIOA
#define USART_GPIO_CLK RCC_APB2Periph_GPIOA
#define USART_CLK RCC_APB2Periph_USART1
#define USART_BAUDRATE 115200
/* Global variables */
CanTxMsg TxMessage;
CanRxMsg RxMessage;
/* Function prototypes */
void GPIO_Configuration(void);
void USART_Configuration(void);
void CAN_Configuration(void);
void NVIC_Configuration(void);
void USART_SendString(char* s);
void USART_SendChar(char c);
int main(void)
{
/* Initialize GPIO, USART, CAN, and NVIC */
GPIO_Configuration();
USART_Configuration();
CAN_Configuration();
NVIC_Configuration();
while (1)
{
/* Wait for USART data to be available */
while (USART_GetFlagStatus(USART1, USART_FLAG_RXNE) == RESET);
/* Read USART data and store in CAN message */
uint8_t data = USART_ReceiveData(USART1);
TxMessage.Data[0] = data;
/* Send CAN message */
TxMessage.IDE = CAN_ID_STD;
TxMessage.StdId = 0x123;
TxMessage.DLC = 1;
CAN_Transmit(CAN1, &TxMessage);
}
}
void GPIO_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
/* Enable GPIO clock */
RCC_APB2PeriphClockCmd(CAN_GPIO_CLK | USART_GPIO_CLK, ENABLE);
/* Configure CAN pins */
GPIO_InitStructure.GPIO_Pin = CAN_RX_PIN | CAN_TX_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(CAN_GPIO_PORT, &GPIO_InitStructure);
/* Configure USART pins */
GPIO_InitStructure.GPIO_Pin = USART_RX_PIN | USART_TX_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(USART_GPIO_PORT, &GPIO_InitStructure);
}
void USART_Configuration(void)
{
USART_InitTypeDef USART_InitStructure;
/* Enable USART clock */
RCC_APB2PeriphClockCmd(USART_CLK, ENABLE);
/* Configure USART */
USART_InitStructure.USART_BaudRate = USART_BAUDRATE;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Tx | USART_Mode_Rx;
USART_Init(USART1, &USART_InitStructure);
/* Enable USART */
USART_Cmd(USART1, ENABLE);
}
void CAN_Configuration(void)
{
CAN_InitTypeDef CAN_InitStructure;
/* Enable CAN clock */
RCC_APB1PeriphClockCmd(CAN_CLK, ENABLE);
/* Configure CAN */
CAN_StructInit(&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 = DISABLE;
CAN_InitStructure.CAN_Mode = CAN_Mode_Normal;
CAN_InitStructure.CAN_SJW = CAN_SJW_1tq;
CAN_InitStructure.CAN_BS1 = CAN_BS1_3tq;
CAN_InitStructure.CAN_BS2 = CAN_BS2_4tq;
CAN_InitStructure.CAN_Prescaler = 4;
CAN_Init(CAN1, &CAN_InitStructure);
/* Configure CAN filter */
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_FIFO0;
CAN_FilterInitStructure.CAN_FilterActivation = ENABLE;
CAN_FilterInit(&CAN_FilterInitStructure);
}
void NVIC_Configuration(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
/* Configure CAN interrupt */
NVIC_InitStructure.NVIC_IRQChannel = USB_LP_CAN1_RX0_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x00;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x01;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
/* Enable CAN interrupt */
CAN_ITConfig(CAN1, CAN_IT_FMP0, ENABLE);
}
void USART_SendString(char* s)
{
while (*s)
{
USART_SendChar(*s++);
}
}
void USART_SendChar(char c)
{
USART_SendData(USART1, c);
/* Wait for transmission to complete */
while (USART_GetFlagStatus(USART1, USART_FLAG_TC) == RESET);
}
void USB_LP_CAN1_RX0_IRQHandler(void)
{
/* Check if message received in FIFO0 */
if (CAN_GetITStatus(CAN1, CAN_IT_FMP0) != RESET)
{
/* Read message from CAN */
CAN_Receive(CAN1, CAN_FIFO0, &RxMessage);
/* Send message over USART */
char buffer[50];
sprintf(buffer, "Received CAN message with ID: %d and data: %d\n", RxMessage.StdId, RxMessage.Data[0]);
USART_SendString(buffer);
}
}
```
在这个示例代码中,我们将串口和CAN都配置为使用标准ID,CAN的波特率为250Kbps,USART的波特率为115200bps。当串口接收到数据时,我们将数据存储在CAN消息中,然后将该消息发送到CAN总线上。当CAN接收到数据时,我们将数据发送到串口上。
注意:这只是一个示例代码,实际使用时需要根据具体情况进行修改和优化。