stm32f103ze can通讯代码
时间: 2023-05-13 08:02:52 浏览: 82
STM32F103ZE是一款ARM Cortex-M3内核的微控制器,支持多种通信协议。其中,CAN是一种常用的工业控制总线协议,用于在控制系统中传输数据。下面是STM32F103ZE的CAN通讯代码。
首先,需要在STM32 CubeMX中配置CAN总线参数,并且根据需要选择适当的模式,例如循环模式或正常模式。然后,在程序中初始化CAN总线,并设置CAN波特率、过滤器等参数。初始化完成后,可以通过CAN发送和接收数据。
以下是发送CAN数据的代码:
```
CAN_HandleTypeDef hcan;
CAN_TxHeaderTypeDef TxHeader;
uint32_t TxMailbox;
// 初始化CAN总线
void MX_CAN_Init(void)
{
hcan.Instance = CAN1;
hcan.Init.Mode = CAN_MODE_NORMAL;
hcan.Init.AutoBusOff = ENABLE;
hcan.Init.AutoWakeUp = ENABLE;
hcan.Init.AutoRetransmission = ENABLE;
hcan.Init.ReceiveFifoLocked = DISABLE;
hcan.Init.TransmitFifoPriority = DISABLE;
hcan.Init.SyncJumpWidth = CAN_SJW_1TQ;
hcan.Init.TimeSeg1 = CAN_BS1_12TQ;
hcan.Init.TimeSeg2 = CAN_BS2_3TQ;
hcan.Init.Prescaler = 5;
if (HAL_CAN_Init(&hcan) != HAL_OK)
{
Error_Handler();
}
CAN_FilterTypeDef sFilterConfig;
sFilterConfig.FilterBank = 0;
sFilterConfig.FilterMode = CAN_FILTERMODE_IDMASK;
sFilterConfig.FilterScale = CAN_FILTERSCALE_32BIT;
sFilterConfig.FilterIdHigh = 0x0000;
sFilterConfig.FilterIdLow = 0x0000;
sFilterConfig.FilterMaskIdHigh = 0x0000;
sFilterConfig.FilterMaskIdLow = 0x0000;
sFilterConfig.FilterFIFOAssignment = CAN_FILTER_FIFO0;
sFilterConfig.FilterActivation = ENABLE;
if (HAL_CAN_ConfigFilter(&hcan, &sFilterConfig) != HAL_OK)
{
Error_Handler();
}
}
// 发送CAN消息
void CAN_Send(uint8_t data[8])
{
TxHeader.StdId = 0x321;
TxHeader.ExtId = 0x01;
TxHeader.RTR = CAN_RTR_DATA;
TxHeader.IDE = CAN_ID_STD;
TxHeader.DLC = 8;
if (HAL_CAN_AddTxMessage(&hcan, &TxHeader, data, &TxMailbox) != HAL_OK)
{
Error_Handler();
}
}
```
以下是接收CAN数据的代码:
```
CAN_HandleTypeDef hcan;
CAN_RxHeaderTypeDef RxHeader;
uint8_t RxData[8];
// 初始化CAN总线
void MX_CAN_Init(void)
{
...
}
// 接收CAN消息
void CAN_Receive(void)
{
if (HAL_CAN_GetRxMessage(&hcan, CAN_RX_FIFO0, &RxHeader, RxData) == HAL_OK)
{
// 处理接收到的数据
...
}
}
```
以上就是STM32F103ZE的CAN通讯代码,开发者可以根据实际应用场景进行修改和优化。