138 Upp问题咨询

liangws · 发表于 2017-4-11 14:43:31

本帖最后由 liangws 于 2017-4-11 17:00 编辑

问题描述：
在syslink模式下开发upp，在138端参考tl-upp_saver程序通过channel b发送数据到FPGA端，FPGA接收数据到FIFO，然后从FIFO端发送給138的upp channel A。fpga端程序通过仿真没有发现什么问题，具体方针波形如下：

图中的UPP_CH0*对应于138的Channel b通道，UPP_CH1*对应于138的channela通道。

测试结果如下：
138端发送512字节，要连续发送8次，即8*512字节，接收端才能收满一个512字节数据，这个可能是什么问题引起的？

备注：
1、看了upp相关文档，绑定的窗口地址WindowAddress要8字节对齐，tl-upp_saver例程中只有发送端upp_buffer_b有8字节对齐，接收端没有8字节对齐，这个是否有问题？我上述问题是否由于这个引起？
2、相关代码如下：
//UPP DMA缓冲大小512字节
#define UPP_DMA_BYTE_COUNT  (64) //DMA行字节数,每行64个字节,行的字节必须是64的整数倍
#define UPP_DMA_LINE_COUNT 8 //DMA行数, DMA行数 = DMA缓冲区大小/UPP_DMA_BYTE_COUNT
#define UPP_DMA_BUFFER_SIZE (UPP_DMA_BYTE_COUNT * UPP_DMA_LINE_COUNT)

//upp接收、发送buffer
#pragma DATA_ALIGN(upp_buffer_a, 8)
#pragma DATA_ALIGN(upp_buffer_b, 8)

unsigned char upp_buffer_a[UPP_DMA_BUFFER_SIZE];
unsigned char upp_buffer_b[UPP_DMA_BUFFER_SIZE];

static bool server_upp_data_recv(Server *server)
{
if(server->upp_channel_a_recv == false) {
      server_msg_send(server, APP_CMD_LOG, "upp recv: start");
      if(ListMP_empty(server->upp_recv_list_free) == FALSE) {
         server_msg_send(server, APP_CMD_LOG, "upp recv: get node success");

         memset(upp_buffer_a, 0, UPP_DMA_BUFFER_SIZE);

         server->upp_channel_a_recv = true;//
         server->transposeParA.WindowAddress    = ((unsigned int *)upp_buffer_a);
         server->transposeParA.LineCount       = UPP_DMA_LINE_COUNT;
         server->transposeParA.ByteCount       = UPP_DMA_BYTE_COUNT;
         server->transposeParA.LineOffsetAddress = UPP_DMA_BYTE_COUNT;//

         upp_error_count = 0;
         upp_dmai_int_cut = 0;

         // fill in data
         uPPDMATransfer(SOC_UPP_0_REGS, uPP_DMA_CHI, &server->transposeParA);
         server_msg_send(server, APP_CMD_LOG, "upp recv: binding node to dma chi");
      }
}
else{
      if (upp_dmai_int_cut > 0){
         DataNode *node = (DataNode *)ListMP_getTail(server->upp_recv_list_free);
         Uint8 *data = (Uint8 *)SharedRegion_getPtr(node->SR_buffer);

         //copy data to upp_recv_list_busy
         memcpy(data, upp_buffer_a, UPP_DMA_BUFFER_SIZE);

         //
         ListMP_putHead(server->upp_recv_list_busy, (ListMP_Elem *)node);

         //
         server->upp_channel_a_recv = false;//

         server_msg_send(server, APP_CMD_LOG, "upp recv: success");
      }
}

return true;
}

static bool server_upp_data_send(Server *server)
{
if(ListMP_empty(server->upp_send_list_busy) == FALSE){
      DataNode *node = (DataNode *)ListMP_getTail(server->upp_send_list_busy);
      unsigned char *data = (unsigned char *)SharedRegion_getPtr(node->SR_buffer);
      char tmp[128] ={0};

      server_msg_send(server, APP_CMD_LOG, "upp send: start");
      print_log(server, data, 64);

      //
      memset(upp_buffer_b, 0, UPP_DMA_BUFFER_SIZE);
      memcpy(upp_buffer_b, data, UPP_DMA_BUFFER_SIZE);
      print_log(server, upp_buffer_b, 64);

      server->transposeParB.WindowAddress    = ((unsigned int *)upp_buffer_b);
      server->transposeParB.LineCount       = UPP_DMA_LINE_COUNT;
      server->transposeParB.ByteCount       = UPP_DMA_BYTE_COUNT;
      server->transposeParB.LineOffsetAddress = UPP_DMA_BYTE_COUNT;

      memset(tmp, 0, sizeof(tmp));
      sprintf(tmp, "upp send data: sizeof(unsigned int):%d, upp_buffer_b:%p, WindowAddress:%ud",
         sizeof(unsigned int), upp_buffer_b, server->transposeParB.WindowAddress);
      server_msg_send(server, APP_CMD_LOG, tmp);

      upp_error_count = 0;
      upp_dmaq_int_cut = 0;
      // fill in data
      uPPDMATransfer(SOC_UPP_0_REGS, uPP_DMA_CHQ, &server->transposeParB);
      server_msg_send(server, APP_CMD_LOG, "upp send: binding node to dma chq");

      // wait send success
      while (upp_dmaq_int_cut < 1 && upp_error_count == 0);

      // make data node in free list
      ListMP_putHead(server->upp_send_list_free, (ListMP_Elem *)node);
      server_msg_send(server, APP_CMD_LOG, "upp send: success");
}
return true;
}

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