使用ST的例程环回模式是可以的，小弟是新手，请问要改成正常模式怎么改？
我只是改了CAN_InitStructure.CAN_Mode = CAN_Mode_Normal; 发现发送不成功，发送后检查状态CAN_TransmitStatus 一直没有CANTXOK，（用示波器看TX引脚也没有波形）是不是还要改别的地方？
#ifdef USE_CAN1
/* CANx Periph clock enable */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_CAN1, ENABLE);
#else /* USE_CAN2 */
/* CAN1 & 2 Periph clock enable */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_CAN1 | RCC_APB1Periph_CAN2, ENABLE);
#endif /* USE_CAN1 */
TestStatus CAN_Polling(void)
{
/* CAN register init */
CAN_DeInit(CANx);
/* CAN cell init */
CAN_InitStructure.CAN_TTCM = DISABLE;
CAN_InitStructure.CAN_ABOM = DISABLE;
CAN_InitStructure.CAN_AWUM = DISABLE;
CAN_InitStructure.CAN_NART = DISABLE;
CAN_InitStructure.CAN_RFLM = DISABLE;
CAN_InitStructure.CAN_TXFP = DISABLE;
CAN_InitStructure.CAN_Mode = CAN_Mode_Normal;//只改了此处 设为正常模式
CAN_InitStructure.CAN_SJW = CAN_SJW_1tq;
/* CAN Baudrate = 125kbps (CAN clocked at 30 MHz) */
CAN_InitStructure.CAN_BS1 = CAN_BS1_6tq;
CAN_InitStructure.CAN_BS2 = CAN_BS2_8tq;
CAN_InitStructure.CAN_Prescaler = 16;
CAN_Init(CANx, &CAN_InitStructure);
/* CAN filter init */
#ifdef USE_CAN1
CAN_FilterInitStructure.CAN_FilterNumber = 0;
#else /* USE_CAN2 */
CAN_FilterInitStructure.CAN_FilterNumber = 14;
#endif /* USE_CAN1 */
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 = 0;
CAN_FilterInitStructure.CAN_FilterActivation = ENABLE;
CAN_FilterInit(&CAN_FilterInitStructure);
/* transmit */
TxMessage.StdId = 0x11;
TxMessage.RTR = CAN_RTR_DATA;
TxMessage.IDE = CAN_ID_STD;
TxMessage.DLC = 4;
TxMessage.Data[0] = 0x1;
TxMessage.Data[1] = 0x2;
TxMessage.Data[2] = 0x3;
TxMessage.Data[3] = 0x4;
TransmitMailbox = CAN_Transmit(CANx, &TxMessage);
i = 0;
while((CAN_TransmitStatus(CANx, TransmitMailbox) != CANTXOK) && (i != 0xFFFF))//在环回模式下正常，换成正常模式发送状态函数就一直不返回CANTXOK
{
i++;
}
i = 0;
while((CAN_MessagePending(CANx, CAN_FIFO0) < 1) && (i != 0xFFFF))
{
i++;
}
}
void NVIC_Config(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
/* Enable CANx RX0 interrupt IRQ channel */
#ifdef USE_CAN1
NVIC_InitStructure.NVIC_IRQChannel = CAN1_RX0_IRQn;
#else /* USE_CAN2 */
NVIC_InitStructure.NVIC_IRQChannel = CAN2_RX0_IRQn;
#endif /* USE_CAN1 */
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
} |
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