主题:EM9280-SPI通信问题 共有52966人关注过本帖 |
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jagict |
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Post By:2013-11-4 13:24:00 [只看该作者]
帮忙看一下配置吧,现在的波形没什么指导意义,就是MOSI高电平正弦波形,其他低电平几乎无信号。 主函数: hSPI = SPI.SPIOpen(); if... SPI.SPISetBandRate(hSPI, SPI.SPI_TRANSFER_HS_NORMAL_SPEED); TxBuffer[0] = 0xfc; //主机发送的数据_低8位 TxBuffer[1] = 0xf3; //主机发送的数据_高8位 sSPI.BitCount = 2; sSPI.pDatBuf = pTxBuffer; sSPI.dwDatLen = 2; sSPI.bLockCS = 0; Marshal.Copy(TxBuffer, 0, pTxBuffer, 2); bRes = SPI.WriteFile(hSPI, ref sSPI, sizeSPI, ref uLen, 0); if (!bRes)... sSPI.BitCount = 4; sSPI.pDatBuf = pRxBuffer; sSPI.dwDatLen = 10; sSPI.bLockCS = 1; while (true) { bRes = SPI.ReadFile(hSPI, ref sSPI, sizeSPI, ref uLen, 0); } SPI.CS文件: public static bool SPIConfigure(int hDevice) { int sizeSSP_INIT = Marshal.SizeOf(typeof(SSP_INIT)); SSP_INIT spiinit; spiinit.eMode = SSP_MODE_SPI; spiinit.eLength = SSP_WORD_LENGTH_16BITS; spiinit.bDmaEnable = 0; // 0: dma disabled, 1: dma enabled spiinit.b_ceata_ccs_err_en = 0; // CEATA Unexpected CCS Error logic enable. 0: disabled, 1: enabled spiinit.bPhase = 0; // SPI, MemStick, and SD modes spiinit.bPolarity = 0; // SPI, MemStick, and SD modes spiinit.bSlave = 0; // 0: SSP is Master, 1: SSP is Slave spiinit.bIgnoreCrc = 0; // Ignore the response CRC spiinit.bBusWidth4 = 0; // 0: 1-bit bus, 1: 4 bit bus spiinit.bWaitIrq = 0; spiinit.bLongResp = 0; // Get long response from device spiinit.bCheckResp = 0; // Check Response against reference to insure integrity of response spiinit.bGetResp = 0; // wait for a response spiinit.u16TransferCount = 0; spiinit.bEnable = 0; // Command Transmit Enable. spiinit.bWaitCmd = 0; // spiinit.bDataTransfr = 0; // Data Transfer Enable spiinit.bRead = 0; // Read Mode spiinit.bSlaveOutDisable = 0; // 0: SSP can drive MISO in slave mode, 1: SSP does not drive MISO spiinit.bHalfDuplex = 0; spiinit.bLockCs = 1; if (DeviceIoControl(hDevice, SPI_IOCTL_SSPCONFIGURE, ref spiinit, sizeSSP_INIT, null, 0, 0, IntPtr.Zero) == false) { return false; } return true; } |
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