为了追踪 PIPE 接口上有效 PCIe 包的起始点,该接口提供了两种信号:*_sync_header 和 *_start_block。 为了确认 rx_data 上的数据是否为有效包,请检查以下各项: *_data_valid 已被有效 *_start_block 已被有效 *_sync_header 为“1”或“2”。 - 如果该值是“1”,则表示是“Ordered Set”的起始点。
CHNL_RX_OFF[30:0]:四字节偏移,指示包头包尾不是整DW时的字节有效位;(用于过滤协议字一类的数据,比如指示以太网帧前八个前导码无效,从第九个开始存储) CHNL_RX_DATA[DWIDTH-1:0]:数据; CHNL_RX_DATA_VALID:数据有效标志; CHNL_RX_DATA_REN:其实就是RIFFA中FIFO的读使能。当数据标志一般为CHNL_RX_DATA...
M_AXIS_RX_TDATA (m_axis_rx_tdata[C_PCI_DATA_WIDTH-1:0]), .M_AXIS_RX_TKEEP (m_axis_rx_tkeep[(C_PCI_DATA_WIDTH/8)-1:0]), .M_AXIS_RX_TLAST (m_axis_rx_tlast), .M_AXIS_RX_TVALID (m_axis_rx_tvalid), .M_AXIS_RX_TUSER (m_axis_rx_tuser[`SIG_XIL_RX_TUSER_W-...
2. Bit error ratio testers (BERTs) validate physical-layer receiver (Rx) test. 3. Protocol analyzers validate data link layers. Each generation of the PCIe standard doubled the data transfer rate and increased the complexity of test. Regardless of which generation of the standard you are workin...
Added footnote to Table 3-1 clarifying that RxDataValid is not applicable to a SerDes architecture. • Clarified that RxEIDetectDisable is asynchronous for USB/USB4*. Added new Digital Near End Loopback Feature. Added MaxRxClkFrequency PHY parameter. Added constraints on RxCLK when RxValid ...
I have a question about the Altera PCIe Endpoint (all generations). Assuming rx_st_ready does not drop, when rx_st_valid is raised with rx_st_sop,
比较重要的域段是first error pointer和TLP Prefix Log Present,可以通过它们来确定是否记录到valid first uncorrectable error information。 4.2 Header Log Register (Offset 1Ch) 这个register记录了导致报错的TLP的header信息,总共有16B大小。如下图所示,注意寄存器中的排布和TLP header的顺序是反过来的,header的byte ...
PIO_RX_ENGINE.v 分析: 首先,定义了一个变量in_packet_q,高有效,用来表示接收一个TLP包。 如下: wiresop;// Start of packetregin_packet_q;always@(posedgeclk)beginif(!rst_n) in_packet_q <= # TCQ1'b0;elseif(m_axis_rx_tvalid && m_axis_rx_tready && m_axis_rx_tlast) ...
Rx_st_valid: 和rx_st_ready 之间的时序关系参考Figure 5-13。 Rx_st_data: 接收数据总线。 Rx_st_sop: 包起始标志位 Rx_st_eop: 包结束标志位 Rx_st_empty :在 rx_st_data 数据低 64bits 结束传输时给出确认信号。该信号只在使用 硬核的128bits 模式时有效。 Rx_st_err :当一个无法纠正的ECC ...
.m_axib_wdata (m_axib_wdata), .m_axib_wstrb (m_axib_wstrb), .m_axib_wlast (m_axib_wlast), .m_axib_wvalid (m_axib_wvalid), .m_axib_wready (m_axib_wready), .m_axib_bid (m_axib_bid), .m_axib_bresp (m_axib_bresp), ...