LPC54618 CAN0 收发不成功 ,CAN1收发正常，不知错在那里了？

bzxc41408 · 发表于 2020-7-1 17:10:41

我从官网上修改引脚过来的程序初始化如下:
   mcan_config_t mcanConfig;
mcan_frame_filter_config_t rxFilter;
mcan_ext_filter_element_config_t extFilter;
mcan_rx_fifo_config_t rxFifo0;
mcan_tx_buffer_config_t txBuffer;
uint8_t node_type;
uint8_t numMessage = 0;
uint8_t cnt       = 0;

// Set MCAN clock 180/6=30MHz. /

// 引脚配置：
     IOCON->PIO[1][2] = ((IOCON->PIO[1][2] &
   // Mask bits to zero which are setting //
   (~(IOCON_PIO_FUNC_MASK | IOCON_PIO_DIGIMODE_MASK)))

// Selects pin function.
// * : PORT12 (pin 117) is configured as CAN0_TD. //
| IOCON_PIO_FUNC(PIO12_FUNC_ALT1)

// Select Analog/Digital mode.
// : Digital mode. /
| IOCON_PIO_DIGIMODE(PIO12_DIGIMODE_DIGITAL));

IOCON->PIO[1][3] = ((IOCON->PIO[1][3] &
   // Mask bits to zero which are setting //
   (~(IOCON_PIO_FUNC_MASK | IOCON_PIO_DIGIMODE_MASK)))

// Selects pin function.
// * : PORT13 (pin 120) is configured as CAN0_RD. //
| IOCON_PIO_FUNC(PIO13_FUNC_ALT1)

// Select Analog/Digital mode.
// * : Digital mode. //
| IOCON_PIO_DIGIMODE(PIO13_DIGIMODE_DIGITAL));
  // 时钟源配置
CLOCK_SetClkDiv(kCLOCK_DivCan0Clk, 6U, true);

MCAN_GetDefaultConfig(&mcanConfig);

#if (defined(USE_IMPROVED_TIMING_CONFIG) && USE_IMPROVED_TIMING_CONFIG)
mcan_timing_config_t timing_config;
memset(&timing_config, 0, sizeof(timing_config));

if (MCAN_CalculateImprovedTimingValues(mcanConfig.baudRateA, MCAN_CLK_FREQ, &timing_config))
{
/* Update the improved timing configuration*/
memcpy(&(mcanConfig.timingConfig), &timing_config, sizeof(mcan_timing_config_t));
}
else
{
   // PRINTF("No found Improved Timing Configuration. Just used default configuration\r\n\r\n");
}

#endif
// 基础配置
MCAN_Init(EXAMPLE_MCAN, &mcanConfig, MCAN_CLK_FREQ);

// Create MCAN handle structure and set call back function. //

MCAN_TransferCreateHandle(EXAMPLE_MCAN, &mcanHandle, mcan_callback, NULL);
// Set Message RAM base address and clear to avoid BEU/BEC error. //
MCAN_SetMsgRAMBase(EXAMPLE_MCAN, MSG_RAM_BASE);
uint32_t *p = (uint32_t *)(MSG_RAM_BASE);
memset(p, 0, (8U + CAN_DATASIZE) * sizeof(uint8_t));

/* STD filter config. */
rxFilter.address  = STD_FILTER_OFS;
rxFilter.idFormat = kMCAN_FrameIDExtend;
rxFilter.listSize = 0U;
rxFilter.nmFrame  = kMCAN_acceptinFifo0;
rxFilter.remFrame = kMCAN_filterFrame;
MCAN_SetFilterConfig(EXAMPLE_MCAN, &rxFilter);

extFilter.efec=kMCAN_disable;
extFilter.eft=kMCAN_range;
extFilter.efid1=0; //  : 29; /*!< Extended Filter ID 1. */
extFilter.efid2=0x1fffffff;//  : 29; /*!< Extended Filter ID 2. */
MCAN_SetEXTFilterElement(EXAMPLE_MCAN, &rxFilter,&extFilter,0);

/* RX fifo0 config. */
rxFifo0.address    = RX_FIFO0_OFS;
rxFifo0.elementSize = 1U;
rxFifo0.watermark    = 0;
rxFifo0.opmode       = kMCAN_FifoBlocking;
rxFifo0.datafieldSize = kMCAN_8ByteDatafield;
MCAN_SetRxFifo0Config(EXAMPLE_MCAN, &rxFifo0);

/* TX buffer config. */
memset(&txBuffer, 0, sizeof(txBuffer));
txBuffer.address    = TX_BUFFER_OFS;
txBuffer.dedicatedSize = 1U;
txBuffer.fqSize       = 0;
txBuffer.datafieldSize = kMCAN_8ByteDatafield;

MCAN_SetTxBufferConfig(EXAMPLE_MCAN, &txBuffer);

/* Finish software initialization and enter normal mode, synchronizes to
   CAN bus, ready for communication */
MCAN_EnterNormalMode(EXAMPLE_MCAN);

// -------------------------------------------------------------------------------------------------------------------------------------------------------------
// 以下为发送部分：

// ----------- 1秒计时 --------------
   if(uiCAN0RunT<1000) return;
   uiCAN0RunT=0;

      // Test_LED_TOGGLE();

      // Config TX frame data. //

      txIdentifier=0x1826f456U;
tx_data[0] =0x01;
tx_data[1] =0x01;
tx_data[2] =0x00;
tx_data[3] =0xff;
tx_data[4] =0xff;
tx_data[5] =0xff;
tx_data[6] =0xff;
tx_data[7] =0xff;

         txFrame.xtd  = kMCAN_FrameIDExtend;    //  kMCAN_FrameIDStandard;
         txFrame.rtr  = kMCAN_FrameTypeData;    // kMCAN_FrameTypeRemote; // kMCAN_FrameTypeData;
         txFrame.fdf  = 0;
         txFrame.brs  = 0;

         txFrame.id =txIdentifier;// txIdentifier << STDID_OFFSET;
         txFrame.data = tx_data;
         txFrame.size = CAN_DATASIZE;

         txFrame.fdf = 0; // 1;
         txFrame.brs = 1;
         txFrame.dlc = 6;

         txXfer.frame    = &txFrame;
         txXfer.bufferIdx = 0;
         MCAN_TransferSendNonBlocking(EXAMPLE_MCAN, &mcanHandle, &txXfer);

  // ------------------------------------------------------------------------------------------------------------------------------------------------------