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Error when I run vector-add example on FPGA OpenCL. ERROR: Unable to find Intel(R) FPGA OpenCL platform.

I am trying to use Vector_Add example on DE5-Net board. I have installed the board and driver:

argus@argus-R815:/tools/intelFPGA/19.1/hld/board/trasic/de5net/tests/vector_add$ aocl diagnose Verified that the kernel mode driver is installed on the host machine. Using board package from vendor: Terasic Corporation Querying information for all supported devices that are installed on the host machine ... Device Name Status Information acl0 Passed Stratix V Reference Platform PCIe dev_id = D800, bus:slot.func = 23:00.00, at Gen 2 with 8 lanes FPGA temperature = 35 degrees C. Found 1 active device(s) installed on the host machine. To perform a full diagnostic on a specific device, please run aocl diagnose <device_name> DIAGNOSTIC_PASSED Call "aocl diagnose <device-names>" to run diagnose for specified devices Call "aocl diagnose all" to run diagnose for all devices argus@argus-R815:/tools/intelFPGA/19.1/hld/board/trasic/de5net/tests/vector_add$ aocl diagnose acl0 Verified that the kernel mode driver is installed on the host machine. Using platform: Intel(R) FPGA SDK for OpenCL(TM) Using Device with name: de5net_a7 : Stratix V Reference Platform Using Device from vendor: Terasic Corporation clGetDeviceInfo CL_DEVICE_GLOBAL_MEM_SIZE = 4294967296 clGetDeviceInfo CL_DEVICE_MAX_MEM_ALLOC_SIZE = 4293918720 Memory consumed for internal use = 1048576 Actual maximum buffer size = 4293918720 bytes Writing 4095 MB to global memory ... Allocated 1073741824 Bytes host buffer for large transfers Write speed: 1785.15 MB/s [1774.30 -> 1792.59] Reading and verifying 4095 MB from global memory ... Read speed: 1933.75 MB/s [1932.15 -> 1935.20] Successfully wrote and readback 4095 MB buffer Transferring 8192 KBs in 16 512 KB blocks ... 1578.84 MB/s Transferring 8192 KBs in 8 1024 KB blocks ... 1429.86 MB/s Transferring 8192 KBs in 4 2048 KB blocks ... 1774.93 MB/s Transferring 8192 KBs in 2 4096 KB blocks ... 1823.38 MB/s Transferring 8192 KBs in 1 8192 KB blocks ... 1840.76 MB/s PCIe Gen2.0 peak speed: 500MB/s/lane Writing 8192 KBs with block size (in bytes) below: Block_Size Avg Max Min End-End (MB/s) 524288 1326.17 1438.37 1214.92 1312.46 1048576 1193.22 1313.45 1045.00 1176.04 2097152 1490.95 1555.86 1403.88 1484.81 4194304 1585.38 1621.38 1550.94 1581.38 8388608 1603.46 1603.46 1603.46 1603.46 Reading 8192 KBs with block size (in bytes) below: Block_Size Avg Max Min End-End (MB/s) 524288 1540.32 1578.84 1484.84 1521.98 1048576 1403.07 1429.86 1354.74 1384.46 2097152 1752.02 1774.93 1720.33 1745.27 4194304 1771.19 1823.38 1721.91 1768.86 8388608 1840.76 1840.76 1840.76 1840.76 Write top speed = 1621.38 MB/s Read top speed = 1840.76 MB/s Throughput = 1731.07 MB/s DIAGNOSTIC_PASSED

I have built the host and device:

argus@argus-R815:/tools/intelFPGA/19.1/hld/board/trasic/de5net/tests/vector_add$ aocl env bin/vector_add.aocx INPUT_ARGS=device/ -o bin/vector_add.aocx --board de5net_a7 --report BUILD_NUMBER=614 ACL_VERSION=18.0.0 OPERATING_SYSTEM=linux BOARD_SPEC_XML=/tools/intelFPGA/18.0/hld/board/trasic/de5net/hardware/de5net_a7/board_spec.xml PLATFORM_TYPE=s5_net CLANG_VERSION=Intel(R) FPGA SDK for OpenCL(TM), Version 18.0.0 Build 614 Standard Edition, Copyright (C) 2018 Intel Corporation clang version 3.0 (tags/RELEASE_30/final) Target: x86_64-unknown-linux-gnu Thread model: posix LLC_VERSION=Intel(R) FPGA SDK for OpenCL(TM), Version 18.0.0 Build 614 Standard Edition, Copyright (C) 2018 Intel Corporation Low Level Virtual Machine ( llvm version 3.0 Optimized build with assertions. Built Apr 25 2018 (07:54:54). Host: x86_64-unknown-linux-gnu Host CPU: (unknown) Registered Targets: arm - ARM fpga - FPGA Backend fpga64be - FPGA Big Endian Backend griffin - Griffin thumb - Thumb virtualfabric - FPGA Virtual Fabric x86 - 32-bit X86: Pentium-Pro and above x86-64 - 64-bit X86: EM64T and AMD64 SYS_INTEGRATOR_VERSION=$Header: //acds/rel/18.0std/acl/sysgen/system_integrator/main.cpp#1 $ LIB_PATH=/tools/intelFPGA/18.0/hld/host/linux64/lib:/tools/intelFPGA/18.0/hld/linux64/lib:/tools/intelFPGA/18.0/quartus/bin:/tools/intelFPGA/18.0/hld/linux64/lib/dspba/linux64:/opt/xilinx/xrt/lib:/tools/intelFPGA/18.0/hld/board/trasic/de5net/linux64/lib:/tools/intelFPGA/18.0/hld/linux64/lib:/tools/intelFPGA/18.0/hld/linux64/lib:/opt/xilinx/xrt/lib:/tools/intelFPGA/18.0/hld/board/trasic/de5net/linux64/lib:/tools/intelFPGA/18.0/hld/linux64/lib:/tools/intelFPGA/18.0/hld/linux64/lib: AOCL_BOARD_PKG_ROOT=/tools/intelFPGA/18.0/hld/board/trasic/de5net QUARTUS_VERSION=Quartus Prime Shell Version 18.0.0 Build 614 04/24/2018 SJ Standard Edition Copyright (C) 2018 Intel Corporation. All rights reserved. QUARTUS_OPTIONS=quartus_sh --flow compile top -c top ACL_QSH_COMPILE_CMD= argus@argus-R815:/tools/intelFPGA/19.1/hld/board/trasic/de5net/tests/vector_add$ make argus@argus-R815:/tools/intelFPGA/19.1/hld/board/trasic/de5net/tests/vector_add$ aocl program acl0 bin/vector_add.aocx aocl program: Running program from /tools/intelFPGA/19.1/hld/board/trasic/de5net/linux64/libexec Start to program the device acl0 ... Program succeed.

but when I try to run the application I get an error:

argus@argus-R815:/tools/intelFPGA/19.1/hld/board/trasic/de5net/tests/vector_add$ bin/host Initializing OpenCL ERROR: Unable to find Intel(R) FPGA OpenCL platform.

This is the host code that throws error:

bool init_opencl() { cl_int status; printf("Initializing OpenCL\n"); if(!setCwdToExeDir()) { return false; } // Get the OpenCL platform. platform = findPlatform("Intel(R) FPGA SDK for OpenCL(TM)"); if(platform == NULL) { printf("ERROR: Unable to find Intel(R) FPGA OpenCL platform.\n"); return false; } // Query the available OpenCL device. device.reset(getDevices(platform, CL_DEVICE_TYPE_ALL, &num_devices)); printf("Platform: %s\n", getPlatformName(platform).c_str()); printf("Using %d device(s)\n", num_devices); for(unsigned i = 0; i < num_devices; ++i) { printf(" %s\n", getDeviceName(device[i]).c_str()); }  

Any suggestion on what I may be missing?

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3 Replies
Valued Contributor II

You are using a Terasic board, not an Intel board. You should probably change the string in the findPlatform() function to something else. Try "Terasic" or "Stratix".



Please let us know whether the issue was solved after changing the platform name. 

Also it is seen that two different versions of Quartus are being used as from logs i.e 18.0 and 19.1.

Please use one version of Quartus and the supported similar version of OpenCL SDK to test the execution. 

Thanks and Regards



Hi ,

Please let us know whether updating the platform name helped in resolving the issue.

Thanks and Regards