stm32g431fdcan通信例程
时间: 2023-11-28 19:02:35 浏览: 277
stm32g431fdcan是一款集成了CAN总线通信功能的STM32系列微控制器,它能够支持高速数据传输和实时控制应用。为了演示其CAN通信功能,STMicroelectronics提供了一份通信例程供开发者参考和学习。
在这个例程中,首先需要配置CAN总线的参数,包括波特率、传输模式、帧类型等。然后需要初始化CAN控制器,并配置发送和接收的邮箱,以便进行数据的发送和接收。接着编写发送数据的代码,将需要发送的数据放入邮箱中并触发发送操作。最后编写接收数据的代码,从邮箱中读取接收到的数据并进行处理。
在例程中还会涉及到中断处理和错误处理,以保证通信的稳定性和可靠性。另外,还需要使用相关的外设库函数来完成对CAN控制器的操作,例如HAL库函数等。
除了硬件配置外,还需要注意软件层面的编程技巧和注意事项。例如,在数据发送过程中需要遵循一定的协议和格式,以确保数据能够被正确解析和处理。而在数据接收过程中,需要注意数据的过滤和分析,以保证接收到的数据符合预期并能够被正确处理。
总的来说,stm32g431fdcan通信例程涵盖了从硬件配置到软件编程的方方面面,对于想要学习CAN通信的开发者来说是一个很好的学习资源和参考材料。通过研究示例代码,开发者可以更深入地了解CAN总线的工作原理和应用方法,为自己的项目开发打下良好的基础。
相关问题
STM32G474 fdcan 实用例程及代码实现
为了实现STM32G474的fdcan,您需要进行以下步骤:
1. 配置FDCAN的时钟和引脚
使用HAL库或者直接写寄存器的方式,将FDCAN的时钟和引脚进行配置。
2. 配置FDCAN的工作模式
FDCAN有两种工作模式:Classic CAN和CAN FD。您需要根据实际情况选择合适的模式。
3. 配置FDCAN的参数和过滤器
为了使FDCAN工作,您需要配置一些参数,如数据位长度、波特率等。此外,为了防止接收到无关的消息,您还需要配置过滤器。
4. 使能FDCAN
在所有配置完成后,您需要通过使能FDCAN让其开始工作。
以下是一个简单的FDCAN例程,用于发送和接收一条CAN消息:
```
#include "stm32g4xx_hal.h"
FDCAN_HandleTypeDef hfdcan1;
void FDCAN_Config(void)
{
/* Configure the FDCAN peripheral */
hfdcan1.Instance = FDCAN1;
hfdcan1.Init.FrameFormat = FDCAN_FRAME_CLASSIC;
hfdcan1.Init.Mode = FDCAN_MODE_NORMAL;
hfdcan1.Init.AutoRetransmission = ENABLE;
hfdcan1.Init.TransmitPause = DISABLE;
hfdcan1.Init.ProtocolException = DISABLE;
hfdcan1.Init.NominalPrescaler = 1;
hfdcan1.Init.NominalSyncJumpWidth = 1;
hfdcan1.Init.NominalTimeSeg1 = 6;
hfdcan1.Init.NominalTimeSeg2 = 3;
hfdcan1.Init.DataPrescaler = 1;
hfdcan1.Init.DataSyncJumpWidth = 1;
hfdcan1.Init.DataTimeSeg1 = 6;
hfdcan1.Init.DataTimeSeg2 = 3;
hfdcan1.Init.StdFiltersNbr = 1;
hfdcan1.Init.ExtFiltersNbr = 0;
hfdcan1.Init.TxFifoQueueMode = FDCAN_TX_FIFO_OPERATION;
hfdcan1.Init.TxFifoQueueSize = 2;
hfdcan1.Init.RxFifo0QueueSize = 2;
hfdcan1.Init.RxFifo1QueueSize = 2;
hfdcan1.Init.RxBuffersNbr = 0;
hfdcan1.Init.TxEventsNbr = 0;
if (HAL_FDCAN_Init(&hfdcan1) != HAL_OK)
{
Error_Handler();
}
/* Configure the FDCAN filter */
FDCAN_FilterTypeDef sFilterConfig;
sFilterConfig.IdType = FDCAN_STANDARD_ID;
sFilterConfig.FilterIndex = 0;
sFilterConfig.FilterType = FDCAN_FILTER_MASK;
sFilterConfig.FilterConfig = FDCAN_FILTER_TO_RXFIFO0;
sFilterConfig.FilterID1 = 0x321;
sFilterConfig.FilterID2 = 0x7FF;
if (HAL_FDCAN_ConfigFilter(&hfdcan1, &sFilterConfig) != HAL_OK)
{
Error_Handler();
}
/* Start the FDCAN module */
if (HAL_FDCAN_Start(&hfdcan1) != HAL_OK)
{
Error_Handler();
}
}
void FDCAN_Send(uint32_t id, uint8_t* data, uint32_t len)
{
FDCAN_TxHeaderTypeDef txHeader;
txHeader.Identifier = id;
txHeader.IdType = FDCAN_STANDARD_ID;
txHeader.TxFrameType = FDCAN_DATA_FRAME;
txHeader.DataLength = len;
txHeader.ErrorStateIndicator = FDCAN_ESI_ACTIVE;
txHeader.BitRateSwitch = FDCAN_BRS_OFF;
txHeader.FDFormat = FDCAN_CLASSIC_CAN;
txHeader.TxEventFifoControl = FDCAN_NO_TX_EVENTS;
txHeader.MessageMarker = 0;
if (HAL_FDCAN_AddMessageToTxFifoQ(&hfdcan1, &txHeader, data) != HAL_OK)
{
Error_Handler();
}
}
void FDCAN_Receive(uint32_t* id, uint8_t* data, uint32_t* len)
{
FDCAN_RxHeaderTypeDef rxHeader;
if (HAL_FDCAN_GetRxFifoFillLevel(&hfdcan1, FDCAN_RX_FIFO0) > 0)
{
if (HAL_FDCAN_GetRxMessage(&hfdcan1, FDCAN_RX_FIFO0, &rxHeader, data) != HAL_OK)
{
Error_Handler();
}
*id = rxHeader.Identifier;
*len = rxHeader.DataLength;
}
}
void Error_Handler(void)
{
/* Handle errors here */
}
int main(void)
{
/* Initialize the HAL library */
HAL_Init();
/* Configure the system clock */
SystemClock_Config();
/* Configure the FDCAN peripheral */
FDCAN_Config();
/* Send a message */
uint8_t data[] = "Hello, world!";
FDCAN_Send(0x123, data, sizeof(data));
/* Receive a message */
uint32_t id;
uint8_t rxData[8];
uint32_t len;
FDCAN_Receive(&id, rxData, &len);
while (1)
{
/* Do something */
}
}
```
以上代码仅供参考,具体实现过程中请根据实际情况进行相应的修改。
STM32G474 fdcan 接收中断与发送例程及代码实现
以下是STM32G474 FDCAN的发送和接收中断例程,其中包含了FDCAN的中断处理函数和数据处理函数。请注意,此处仅提供参考代码,具体实现过程中需要根据实际情况进行相应的修改。
发送中断例程:
```
#include "stm32g4xx_hal.h"
FDCAN_HandleTypeDef hfdcan1;
void FDCAN_Config(void)
{
/* Configure the FDCAN peripheral */
hfdcan1.Instance = FDCAN1;
hfdcan1.Init.FrameFormat = FDCAN_FRAME_CLASSIC;
hfdcan1.Init.Mode = FDCAN_MODE_NORMAL;
hfdcan1.Init.AutoRetransmission = ENABLE;
hfdcan1.Init.TransmitPause = DISABLE;
hfdcan1.Init.ProtocolException = DISABLE;
hfdcan1.Init.NominalPrescaler = 1;
hfdcan1.Init.NominalSyncJumpWidth = 1;
hfdcan1.Init.NominalTimeSeg1 = 6;
hfdcan1.Init.NominalTimeSeg2 = 3;
hfdcan1.Init.DataPrescaler = 1;
hfdcan1.Init.DataSyncJumpWidth = 1;
hfdcan1.Init.DataTimeSeg1 = 6;
hfdcan1.Init.DataTimeSeg2 = 3;
hfdcan1.Init.StdFiltersNbr = 1;
hfdcan1.Init.ExtFiltersNbr = 0;
hfdcan1.Init.TxFifoQueueMode = FDCAN_TX_FIFO_OPERATION;
hfdcan1.Init.TxFifoQueueSize = 2;
hfdcan1.Init.RxFifo0QueueSize = 2;
hfdcan1.Init.RxFifo1QueueSize = 2;
hfdcan1.Init.RxBuffersNbr = 0;
hfdcan1.Init.TxEventsNbr = 0;
if (HAL_FDCAN_Init(&hfdcan1) != HAL_OK)
{
Error_Handler();
}
/* Configure the FDCAN filter */
FDCAN_FilterTypeDef sFilterConfig;
sFilterConfig.IdType = FDCAN_STANDARD_ID;
sFilterConfig.FilterIndex = 0;
sFilterConfig.FilterType = FDCAN_FILTER_MASK;
sFilterConfig.FilterConfig = FDCAN_FILTER_TO_RXFIFO0;
sFilterConfig.FilterID1 = 0x321;
sFilterConfig.FilterID2 = 0x7FF;
if (HAL_FDCAN_ConfigFilter(&hfdcan1, &sFilterConfig) != HAL_OK)
{
Error_Handler();
}
/* Start the FDCAN module */
if (HAL_FDCAN_Start(&hfdcan1) != HAL_OK)
{
Error_Handler();
}
}
void HAL_FDCAN_TxBufferCompleteCallback(FDCAN_HandleTypeDef* hfdcan, uint32_t BufferIndexes)
{
/* Handle the transmission complete event here */
}
void FDCAN_Send(uint32_t id, uint8_t* data, uint32_t len)
{
FDCAN_TxHeaderTypeDef txHeader;
txHeader.Identifier = id;
txHeader.IdType = FDCAN_STANDARD_ID;
txHeader.TxFrameType = FDCAN_DATA_FRAME;
txHeader.DataLength = len;
txHeader.ErrorStateIndicator = FDCAN_ESI_ACTIVE;
txHeader.BitRateSwitch = FDCAN_BRS_OFF;
txHeader.FDFormat = FDCAN_CLASSIC_CAN;
txHeader.TxEventFifoControl = FDCAN_NO_TX_EVENTS;
txHeader.MessageMarker = 0;
if (HAL_FDCAN_AddMessageToTxFifoQ(&hfdcan1, &txHeader, data) != HAL_OK)
{
Error_Handler();
}
}
```
接收中断例程:
```
#include "stm32g4xx_hal.h"
FDCAN_HandleTypeDef hfdcan1;
void FDCAN_Config(void)
{
/* Configure the FDCAN peripheral */
hfdcan1.Instance = FDCAN1;
hfdcan1.Init.FrameFormat = FDCAN_FRAME_CLASSIC;
hfdcan1.Init.Mode = FDCAN_MODE_NORMAL;
hfdcan1.Init.AutoRetransmission = ENABLE;
hfdcan1.Init.TransmitPause = DISABLE;
hfdcan1.Init.ProtocolException = DISABLE;
hfdcan1.Init.NominalPrescaler = 1;
hfdcan1.Init.NominalSyncJumpWidth = 1;
hfdcan1.Init.NominalTimeSeg1 = 6;
hfdcan1.Init.NominalTimeSeg2 = 3;
hfdcan1.Init.DataPrescaler = 1;
hfdcan1.Init.DataSyncJumpWidth = 1;
hfdcan1.Init.DataTimeSeg1 = 6;
hfdcan1.Init.DataTimeSeg2 = 3;
hfdcan1.Init.StdFiltersNbr = 1;
hfdcan1.Init.ExtFiltersNbr = 0;
hfdcan1.Init.TxFifoQueueMode = FDCAN_TX_FIFO_OPERATION;
hfdcan1.Init.TxFifoQueueSize = 2;
hfdcan1.Init.RxFifo0QueueSize = 2;
hfdcan1.Init.RxFifo1QueueSize = 2;
hfdcan1.Init.RxBuffersNbr = 0;
hfdcan1.Init.TxEventsNbr = 0;
if (HAL_FDCAN_Init(&hfdcan1) != HAL_OK)
{
Error_Handler();
}
/* Configure the FDCAN filter */
FDCAN_FilterTypeDef sFilterConfig;
sFilterConfig.IdType = FDCAN_STANDARD_ID;
sFilterConfig.FilterIndex = 0;
sFilterConfig.FilterType = FDCAN_FILTER_MASK;
sFilterConfig.FilterConfig = FDCAN_FILTER_TO_RXFIFO0;
sFilterConfig.FilterID1 = 0x321;
sFilterConfig.FilterID2 = 0x7FF;
if (HAL_FDCAN_ConfigFilter(&hfdcan1, &sFilterConfig) != HAL_OK)
{
Error_Handler();
}
/* Start the FDCAN module */
if (HAL_FDCAN_Start(&hfdcan1) != HAL_OK)
{
Error_Handler();
}
}
void HAL_FDCAN_RxFifo0MsgPendingCallback(FDCAN_HandleTypeDef* hfdcan)
{
FDCAN_RxHeaderTypeDef rxHeader;
uint8_t rxData[8];
uint32_t len;
if (HAL_FDCAN_GetRxMessage(&hfdcan1, FDCAN_RX_FIFO0, &rxHeader, rxData) != HAL_OK)
{
Error_Handler();
}
/* Handle the received message here */
}
void FDCAN_Receive(uint32_t* id, uint8_t* data, uint32_t* len)
{
/* Not used in this example */
}
```
在上述代码中,发送中断处理函数为`HAL_FDCAN_TxBufferCompleteCallback`,接收中断处理函数为`HAL_FDCAN_RxFifo0MsgPendingCallback`。同时,发送函数为`FDCAN_Send`,接收函数为`FDCAN_Receive`(此处未实现)。
在实现过程中,您需要将以上代码集成到您的工程中,并根据实际情况进行相应的修改。同时,您需要在主函数中使能相应的中断,如下所示:
```
/* Enable FDCAN interrupts */
HAL_NVIC_SetPriority(FDCAN_IT_TX_COMPLETE, 0, 0);
HAL_NVIC_EnableIRQ(FDCAN_IT_TX_COMPLETE);
HAL_NVIC_SetPriority(FDCAN_IT_RX_FIFO0, 0, 0);
HAL_NVIC_EnableIRQ(FDCAN_IT_RX_FIFO0);
```
以上代码中,使能了发送完成和接收FIFO0消息挂起两个中断。
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