我想做多个FPGA的时钟同步，目前的想法是用一个FPGA的内部时钟，复制到外接IO口，接到另一个FPGA的外部时钟引脚，波形有较小的相移但是可以保证同步。想问一下可以复制多次，驱动多个FPGA的同步吗。对驱动能力有什么要求？其中每一个FPGA都用的是一个EP4CE的最小系统板。
2019-01-21 15:07
`synthesis、implementation、generatebitstream这三个过程都成功了，在launchSDK后需要生成FSBL的过程中出错，出错结果图片显示出来，信息也贴出来16:19:36 INFO: Registering command handlers for SDK TCF services16:19:36 INFO: Launching XSCT server: xsct.bat -interactive F:Taskand4and4.sdkemp_xsdb_launch_script.tcl16:19:40 INFO: XSCT server has started successfully.16:19:46 INFO: Successfully done setting XSCT server connection channel16:19:46 INFO: Successfully done setting SDK workspace16:19:46 INFO: Processing command line option -hwspec F:/Task/0and4/0and4.sdk/system_wrapper.hdf.16:20:53 ERROR: (XSDB Server)ERROR: [Common 17-161] Invalid option value '' specified for 'of_objects'.ERROR: [Hsi 55-1545] Problem running tcl command ::sw_axiethernet_v5_7::generate : ERROR: [Common 17-161] Invalid option value '' specified for 'of_objects'. while executing"get_cells -of_objects $conn_busif_handle" ("foreach" body line 4) invoked from within"foreach p2p_busif $p2p_busifs_i {set busif_name [string toupper [get_prop16:20:53 ERROR: (XSDB Server)erty NAME$p2p_busif]]set conn_busif_handle [::hsi::utils::get..." (procedure "get_targetip" line 3) invoked from within"get_targetip $connected_ip" (procedure "get_connected_intf" line 30) invoked from within"get_connected_intf $intf" (procedure "get_connected_ip" line 11) invoked from within"get_connected_ip $periph" ("foreach" body line 5) invoked from within"foreach periph $periphs { set periph_name [string toupper [get_property NAME $periph]]puts $file_handle ""puts $file_handle "/* Ca..." (procedure "xdefine_axi_target_params" line 18) invoked from within"xdefine_axi_target_params $periphs $file_handle" (procedure "xdefine_axiethernet_include_file" line 48) invoked from within"xdefine_axiethernet_include_file $drv_handle "xparameters.h" "XAxiEthernet"" (procedure "::sw_axiethernet_v5_7::generate" line 3) invoked from within"::sw_axiethernet_v5_7::generate axi_ethernet_0"ERROR: [Hsi 55-1442] Error(s) while running TCL procedure generate()16:20:53 ERROR: (XSDB Server)ERROR: [Hsi 55-1450] Error: running generate_bsp.16:20:53 ERROR: Error generating bsp sources: Failed in generating sources`
2019-01-17 17:33
什么是FPGA？FPGA的特点是什么？由哪些部分组成？
2021-11-03 06:17
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2019-09-11 11:52
