TMS320F28377D: McBSP通信问题咨询

最近在学习McBSP模块，需要用到两块开发板之间通过McBSP进行通信，程序需要实现：开发板A发数据，开发板B收数据，开发板B收到数据之后再将数据发送给开发板A，最后开发板A校验收到的数据是否和其发送的数据一致。

拿官方自回环例程改的，如下是官方自回环例程模块初始化程序：

McbspaRegs.SPCR2.all=0x0000;// Reset FS generator, sample rate// generator & transmitterMcbspaRegs.SPCR1.all=0x0000;// Reset Receiver, Right justify wordMcbspaRegs.SPCR1.bit.DLB = 1;// Enable DLB mode. Comment out for// non-DLB mode.McbspaRegs.RCR2.bit.RDATDLY = 1;// RX data delay is 1 bitMcbspaRegs.XCR2.bit.XDATDLY = 1;// TX data delay is 1 bitMcbspaRegs.SRGR2.bit.GSYNC = 0;// No clock sync for CLKGMcbspaRegs.SRGR2.bit.FPER = 320;// Frame-synchronization periodMcbspaRegs.SRGR2.bit.FSGM = 1;// Frame-synchronization pulses from// the sample rate generatorMcbspaRegs.SRGR2.bit.CLKSM = 1;// Sample rate generator input clock// is LSPCLKMcbspaRegs.PCR.bit.SCLKME = 0;McbspaRegs.SRGR1.bit.CLKGDV = 1;// Divide-down value for CLKGdelay_loop();McbspaRegs.SRGR1.bit.FWID = 1;// Frame-synchronization pulse widthMcbspaRegs.PCR.bit.CLKXM = 1;// CLKX generated internally, CLKR// derived from an external sourceMcbspaRegs.PCR.bit.FSXM = 1;// FSX generated internally, FSR// derived from an external source//// Initialize McBSP Data Length//if(data_size == 8)// Run a loopback test in 8-bit mode{InitMcbspa8bit();}if(data_size == 16)// Run a loopback test in 16-bit mode{InitMcbspa16bit();}if(data_size == 32)// Run a loopback test in 32-bit mode{InitMcbspa32bit();}//// Enable Sample rate generator and// wait at least 2 CLKG clock cycles//McbspaRegs.SPCR2.bit.GRST = 1;delay_loop();//// Release from reset// RX, TX and frame sync generator//McbspaRegs.SPCR2.bit.XRST = 1;McbspaRegs.SPCR1.bit.RRST = 1;McbspaRegs.SPCR2.bit.FRST = 1;

我只更改了下面两个地方：McbspaRegs.SPCR1.bit.DLB = 0; McbspaRegs.SRGR2.bit.FSGM = 0;，更改之后发现两个板子之间传的数全是错的，也没找到啥规律，

两块开发板MCbsp模块初始化是一样的，

如下是开发板A中的发送和接收程序

 while(McbspaRegs.SPCR2.bit.XRDY == 0 ) { }  

McbspaRegs.DXR1.all=txdata1A;

while(McbspaRegs.SPCR1.bit.RRDY == 0 ) { } // Check for receive
rdata1A= McbspaRegs.DRR1.all;

如下是开发板B中的接收和发送程序:

while(McbspbRegs.SPCR1.bit.RRDY == 0 ) { } // Check for receive
rdata1B= McbspbRegs.DRR1.all;

while(McbspbRegs.SPCR2.bit.XRDY == 0 ) { }  

txData1B=rdata1B;

McbspbRegs.DXR1.all=txdata1A;

有没有前辈用过这个模块，给点意见或者相应程序也行，谢谢啦

Green Deng：

你好，抱歉不太熟悉这个模块，为你将问题升级至英文版E2E，还请留意以下帖子回复：https://e2e.ti.com/support/microcontrollers/c2000-microcontrollers-group/c2000/f/c2000-microcontrollers-forum/1027603/tms320f28377d-problem-of-mcbsp-module