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請問我利用DE1光碟的DE1_SD_Card_Audio範例5 z3 k! A; \$ o6 N7 e
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可以成功執行SDRAM測試
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8 U9 A- C! s$ ~# U5 p但我用Quartus 7.0 的SOPC Builder重新Build後0 R6 b+ W3 {+ s& }* y3 B0 a x
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再Quartus II Compiler重作同樣實驗
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- ?, ?' r( ` b卻會出現下列錯誤:
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Using cable "USB-Blaster [USB-0]", device 1, instance 0x00$ \' u$ I+ p3 j6 h1 P
Pausing target processor: not responding.
# Q0 v4 B- b I! P; v, _Resetting and trying again: OK$ Y9 B7 S. A* f3 X& a% r
Initializing CPU cache (if present)
P; H& V/ ~ C4 z% F' j! _OK
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. E2 |! u5 |; u0 S# Y$ l, p: d8 TDownloading 00800020 ( 0%)
! W0 C3 T. F8 Y, T* G1 |% _, uDownloading 00810000 (67%)
; p. ]( S% K+ a6 j6 S: ^( Z5 H8 WDownloaded 95KB in 1.1s (86.3KB/s)
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* F' J7 H" ~6 Z. [1 dVerifying 00800020 ( 0%)7 F9 r& B% c# ?7 m
Verify failed between address 0x800020 and 0x80FFFF
2 X/ F0 s& u' s- ~ e1 Z. D& FLeaving target processor paused
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很多文章說明PLL設-3 ns,也有專家說要改成-11ns~-18ns7 d. M! a/ q3 X+ Y0 i# G0 s
# r$ C3 W4 U( [( B: q/ y2 P我試過還是不行* h" ]9 J& r+ X- N
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可否請問是軟體問題? |
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