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fpga: lib: Change max FFT size to 1024

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The max FFT size was 4096, but we don't currently have any devices that
can do that without modification. This is because, currently, the FFT
size must be the same as the packet size, and the largest packet
size supported by most devices is about 8000 bytes, or 2000
sc16 samples. Therefore, the largest FFT size supported without
modifying other code is 1024 samples.

This change frees up about 21% of the LUTs and 36% of the BRAM used by
axi_fft and makes the software block controller and the IP agree on the
maximum FFT size.


Original-commit: 4f387c8ff0571deedc86dc459e94e555b9768282
This commit is contained in:
Wade Fife
2020-08-11 16:20:51 -05:00
parent b4ea61f129
commit 524ac02aaf
1 changed files with 2 additions and 2 deletions
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lib/ip/axi_fft/axi_fft.xci
+2 -2
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@@ -95,7 +95,7 @@
<spirit:configurableElementValue spirit:referenceId="MODELPARAM_VALUE.C_M_AXIS_DATA_TDATA_WIDTH">32</spirit:configurableElementValue>
<spirit:configurableElementValue spirit:referenceId="MODELPARAM_VALUE.C_M_AXIS_DATA_TUSER_WIDTH">16</spirit:configurableElementValue>
<spirit:configurableElementValue spirit:referenceId="MODELPARAM_VALUE.C_M_AXIS_STATUS_TDATA_WIDTH">1</spirit:configurableElementValue>
<spirit:configurableElementValue spirit:referenceId="MODELPARAM_VALUE.C_NFFT_MAX">12</spirit:configurableElementValue>
<spirit:configurableElementValue spirit:referenceId="MODELPARAM_VALUE.C_NFFT_MAX">10</spirit:configurableElementValue>
<spirit:configurableElementValue spirit:referenceId="MODELPARAM_VALUE.C_OPTIMIZE_GOAL">0</spirit:configurableElementValue>
<spirit:configurableElementValue spirit:referenceId="MODELPARAM_VALUE.C_OUTPUT_WIDTH">16</spirit:configurableElementValue>
<spirit:configurableElementValue spirit:referenceId="MODELPARAM_VALUE.C_REORDER_MEM_TYPE">1</spirit:configurableElementValue>
@@ -131,7 +131,7 @@
<spirit:configurableElementValue spirit:referenceId="PARAM_VALUE.target_clock_frequency">200</spirit:configurableElementValue>
<spirit:configurableElementValue spirit:referenceId="PARAM_VALUE.target_data_throughput">50</spirit:configurableElementValue>
<spirit:configurableElementValue spirit:referenceId="PARAM_VALUE.throttle_scheme">nonrealtime</spirit:configurableElementValue>
<spirit:configurableElementValue spirit:referenceId="PARAM_VALUE.transform_length">4096</spirit:configurableElementValue>
<spirit:configurableElementValue spirit:referenceId="PARAM_VALUE.transform_length">1024</spirit:configurableElementValue>
<spirit:configurableElementValue spirit:referenceId="PARAM_VALUE.xk_index">true</spirit:configurableElementValue>
<spirit:configurableElementValue spirit:referenceId="PROJECT_PARAM.ARCHITECTURE">kintex7</spirit:configurableElementValue>
<spirit:configurableElementValue spirit:referenceId="PROJECT_PARAM.BASE_BOARD_PART"/>