Hi Sir ,
I have set a project using CAN .Now I have found a problem , the max value is 0x80 ,in the datasheet it can be up to 255.Please help me to find why ,the following is my configurition code:
void CanInit(uint32_t gateID)
{
//CAN1_Mode_Init(CAN_SJW_1tq,CAN_BS2_3tq,CAN_BS1_11tq,24,CAN_Mode_Normal);
CAN1_Mode_Set(CAN_SJW_1TQ,CAN_BS2_3TQ,CAN_BS1_11TQ,24,CAN_MODE_NORMAL,gateID);//CAN�?始化,波特率50Kbps,smaple=(1+CAN_BS1)/(1+CAN_BS1+CAN_BS2)
}
////CAN1 �?始化�?�?�滤波，便于上�?机广播
void CAN1_Mode_Set(uint32_t tsjw,uint32_t tbs2,uint32_t tbs1,uint16_t brp,uint32_t mode,uint32_t GateID)
{
GPIO_InitTypeDef GPIO_InitStructure;
CAN_InitTypeDef CAN1_InitConf;
CAN_FilterTypeDef sFilterConfig;
__HAL_RCC_CAN1_CLK_ENABLE(); //时钟使能 ，�?�独使用CAN2，时一定先打开CAN1时钟
__HAL_RCC_GPIOA_CLK_ENABLE();
/*PA11 ------> CAN_RX
PA12 ------> CAN_TX
*/
GPIO_InitStructure.Pin = GPIO_PIN_11;
GPIO_InitStructure.Mode = GPIO_MODE_INPUT;
GPIO_InitStructure.Pull = GPIO_NOPULL;
HAL_GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_InitStructure.Pin = GPIO_PIN_12;
GPIO_InitStructure.Mode = GPIO_MODE_AF_PP;
GPIO_InitStructure.Speed = GPIO_SPEED_FREQ_HIGH;
HAL_GPIO_Init(GPIOA, &GPIO_InitStructure);
CAN1_Handler.Instance=CAN1;
CAN1_Handler.Init = CAN1_InitConf;
CAN1_Handler.Init.Prescaler=brp; //分频系数(Fdiv)为brp+1
CAN1_Handler.Init.Mode=mode; //模�?设置
CAN1_Handler.Init.SyncJumpWidth=tsjw; //�?新�?�步跳跃宽度(Tsjw)为tsjw+1个时间�?��? CAN_SJW_1TQ~CAN_SJW_4TQ
CAN1_Handler.Init.TimeSeg1=tbs1; //tbs1范围CAN_BS1_1TQ~CAN_BS1_16TQ
CAN1_Handler.Init.TimeSeg2=tbs2; //tbs2范围CAN_BS2_1TQ~CAN_BS2_8TQ
CAN1_Handler.Init.TimeTriggeredMode=DISABLE; //�?�时间触�?�通信模�?
CAN1_Handler.Init.AutoBusOff=DISABLE; //软件自动离线管�?�
CAN1_Handler.Init.AutoWakeUp=DISABLE; //�?�眠模�?通过软件唤醒(清除CAN->MCR的SLEEP�?)
CAN1_Handler.Init.AutoRetransmission=ENABLE; //�?止报文自动传�?
CAN1_Handler.Init.ReceiveFifoLocked=DISABLE; //报文�?�?定,新的覆盖旧的
CAN1_Handler.Init.TransmitFifoPriority=DISABLE; //优先级由报文标识符决定
if(HAL_CAN_Init(&CAN1_Handler)!=HAL_OK) //�?始化
{
NVIC_SystemReset(); //�?始化失败则�?�?
}
sFilterConfig.FilterBank = 0;
sFilterConfig.FilterMode = CAN_FILTERMODE_IDLIST; //采用32�? 列表方�? xxxx0000 或0000 0000 的地�?��?能被接收
sFilterConfig.FilterScale = CAN_FILTERSCALE_32BIT;
sFilterConfig.FilterIdHigh = 0x0000|(GateID>>16);
sFilterConfig.FilterIdLow = 0x0000|CAN_ID_EXT;
sFilterConfig.FilterMaskIdHigh = 0x0000;
sFilterConfig.FilterMaskIdLow = 0x0000|CAN_ID_EXT;
sFilterConfig.FilterFIFOAssignment = CAN_RX_FIFO1;
sFilterConfig.FilterActivation = ENABLE;
//sFilterConfig.SlaveStartFilterBank = 14;
if (HAL_CAN_ConfigFilter(&CAN1_Handler, &sFilterConfig) != HAL_OK)
{
NVIC_SystemReset(); //�?始化失败则�?�?
}
__HAL_CAN_ENABLE_IT(&CAN1_Handler, CAN_IT_RX_FIFO1_MSG_PENDING);
HAL_NVIC_SetPriority(CAN1_RX1_IRQn,1,0); //CAN2中断,先�?�优先级1级,从优先级0级
HAL_NVIC_EnableIRQ(CAN1_RX1_IRQn); //IRQ通�?�被使能
if (HAL_CAN_Start(&CAN1_Handler) != HAL_OK)
{
NVIC_SystemReset(); //�?始化失败则�?�?
}
}
Thanks .
