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STM32F334R8的CAN测试

zhulikai 提问时间：2016-10-10 15:32 /

问答
是否解决:

STM32F334R8这块芯片的资源好少，我又是个新手需要测试自带的CAN模块，手里只有一块NUCLEO-F334R8的开发板以及一根mini USB程序下载线。在网上也找了很多，利用STM32F3xx_HAL_Driver库中的CAN驱动参考配置，还是实现不了数据的发送，因为只有一块板子，用的是环回测试模式，不知道有没有做过的，谁能提供点帮助，谢谢了

赞收藏 1 评论13 发布时间：2016-10-10 15:32

13个回答

zhulikai 最优答案回答时间：2016-10-13 08:53:35

利用查询模式进行CAN的环回模式已经完成，给需要的朋友参考下

int main(void)
{
static GPIO_InitTypeDef  GPIO_InitStruct;
static CAN_HandleTypeDef CAN_HandleStruct;
static CAN_FilterConfTypeDef CAN_FilterConfStruct;
static CanTxMsgTypeDef CanTxMsgStruct;
static CanRxMsgTypeDef CanRxMsgStruct;

typedef unsigned       char u8;
typedef unsigned short    int u16;
typedef unsigned          int u32;
typedef unsigned    __int64 u64;

u8 Txbuf[8];
u8 Rxbuf[8];
u8 i;
u8 cnt = 0;
HAL_Init();
SystemClock_Config();
__HAL_RCC_CAN1_CLK_ENABLE();
__HAL_RCC_GPIOA_CLK_ENABLE();

GPIO_InitStruct.Alternate = GPIO_AF9_CAN;
GPIO_InitStruct.Mode = GPIO_MODE_AF_OD;
GPIO_InitStruct.Pin = GPIO_PIN_11|GPIO_PIN_12;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

CAN_HandleStruct.Init.ABOM = DISABLE;
CAN_HandleStruct.Init.AWUM = DISABLE;
CAN_HandleStruct.Init.BS1 = CAN_BS1_7TQ;
CAN_HandleStruct.Init.BS2 = CAN_BS2_6TQ;
CAN_HandleStruct.Init.Mode = CAN_MODE_LOOPBACK;
CAN_HandleStruct.Init.NART = ENABLE;
CAN_HandleStruct.Init.Prescaler = 6;
CAN_HandleStruct.Init.RFLM = DISABLE;
CAN_HandleStruct.Init.SJW = DISABLE;
CAN_HandleStruct.Init.TTCM = DISABLE;
CAN_HandleStruct.Init.TXFP = DISABLE;

CAN_HandleStruct.Instance = CAN;
CAN_HandleStruct.Lock = HAL_UNLOCKED;
CAN_HandleStruct.pRxMsg = &CanRxMsgStruct;
CAN_HandleStruct.pTxMsg = &CanTxMsgStruct;
HAL_CAN_Init(&CAN_HandleStruct);

CAN_FilterConfStruct.BankNumber = 0;
CAN_FilterConfStruct.FilterActivation = ENABLE;
CAN_FilterConfStruct.FilterFIFOAssignment = CAN_FILTER_FIFO0;
CAN_FilterConfStruct.FilterIdHigh = 0x0000;
CAN_FilterConfStruct.FilterIdLow = 0x0000;
CAN_FilterConfStruct.FilterMaskIdHigh = 0x0000;
CAN_FilterConfStruct.FilterMaskIdLow = 0x0000;
CAN_FilterConfStruct.FilterMode = CAN_FILTERMODE_IDMASK;
CAN_FilterConfStruct.FilterNumber = 0;
CAN_FilterConfStruct.FilterScale = CAN_FILTERSCALE_32BIT;

HAL_CAN_ConfigFilter(&CAN_HandleStruct, &CAN_FilterConfStruct);
while(1)
{
for(i=0;i<=8;i++)
{
Txbuf[i]=cnt+i;
}

CanTxMsgStruct.DLC = 8;
CanTxMsgStruct.ExtId = 0x12;
CanTxMsgStruct.IDE = 0;
CanTxMsgStruct.RTR = 0;
CanTxMsgStruct.StdId = 0x12;
for(i=0;i<8;i++)
CanTxMsgStruct.Data[i]=Txbuf[i];
HAL_CAN_Transmit(&CAN_HandleStruct,0);

HAL_CAN_Receive(&CAN_HandleStruct,CAN_FIFO0, 1000);
for(i=0;i<CanRxMsgStruct.DLC; i++)
Rxbuf[i] = CanRxMsgStruct.Data[i];
if(CanRxMsgStruct.DLC)
{
for(i=0;i<=8;i++)
{
printf("%d\t", Rxbuf[i]);
}
}
HAL_Delay(1000);
}

}