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各位专家好! 测试环境:6678+CCSv5.2 使用论坛中例程K1_STK_v1.1中的SRIO程序,进行SERDES_Loopback测试,测试速率5G,参考时钟312.5M(与例程相同),测试结果与例程文档中给出的参考结果不同: 其中每种测试的速率都比例程慢一倍,最高速率1816 Mbps,而参考结果的最高速率为3624Mbps。 请问:1.为什么会出现这种现象呢? 2.在配置传输速率的过程中,除了参考时钟和传输速率,还需要对其他参数进行配置吗? 以下为板子上跑的部分结果: [C66xx_0] JTAG ID= 0x1009e02f. This is C6678/TCI6608 device, version variant = 1. [C66xx_0] DEVSTAT= 0x00001a21. little endian, No boot or EMIF16(NOR FLASH) or UART boot, PLL configuration implies the input clock for core is 100MHz. [C66xx_0] SmartReflex VID= 63, required core voltage= 1.104V. [C66xx_0] Die ID= 0x0400300a, 0x04044d3f, 0x00000000, 0x71520001 [C66xx_0] Device speed grade = 1000MHz. [C66xx_0] Enable Exception handling... [C66xx_0] SRIO_SERDES_LOOPBACK test start............................................ [C66xx_0] Initialize DSP main clock = 100.00MHz/1x10 = 1000MHz [C66xx_0] SRIO link speed is 5.000Gbps [C66xx_0] SRIO path configuration 1xLaneA [C66xx_0] SWRITE from 0x10802200 to 0x1080a200, 8 bytes, 1110 cycles, 57 Mbps, completion code = 0 [C66xx_0] SWRITE from 0x10802200 to 0x1080a200, 16 bytes, 1039 cycles, 123 Mbps, completion code = 0 [C66xx_0] SWRITE from 0x10802200 to 0x1080a200, 32 bytes, 1243 cycles, 205 Mbps, completion code = 0 [C66xx_0] SWRITE from 0x10802200 to 0x1080a200, 64 bytes, 1279 cycles, 400 Mbps, completion code = 0 [C66xx_0] SWRITE from 0x10802200 to 0x1080a200, 128 bytes, 1820 cycles, 562 Mbps, completion code = 0 [C66xx_0] SWRITE from 0x10802200 to 0x1080a200, 256 bytes, 2689 cycles, 761 Mbps, completion code = 0 [C66xx_0] SWRITE from 0x10802200 to 0x1080a200, 512 bytes, 3814 cycles, 1073 Mbps, completion code = 0 [C66xx_0] SWRITE from 0x10802200 to 0x1080a200, 1024 bytes, 6054 cycles, 1353 Mbps, completion code = 0 [C66xx_0] SWRITE from 0x10802200 to 0x1080a200, 2048 bytes, 10427 cycles, 1571 Mbps, completion code = 0 [C66xx_0] SWRITE from 0x10802200 to 0x1080a200, 4096 bytes, 19343 cycles, 1694 Mbps, completion code = 0 [C66xx_0] SWRITE from 0x10802200 to 0x1080a200, 8192 bytes, 37245 cycles, 1759 Mbps, completion code = 0 [C66xx_0] SWRITE from 0x10802200 to 0x1080a200, 16384 bytes, 72897 cycles, 1798 Mbps, completion code = 0 [C66xx_0] SWRITE from 0x10802200 to 0x1080a200, 32768 bytes, 144323 cycles, 1816 Mbps, completion code = 0 以下为例程文档中给的参考结果:
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