請問：DE1 SDRAM問題

wucc007isme

請問我利用DE1光碟的DE1_SD_Card_Audio範例

並利用NIOS II IDE執行MemoryTest

可以成功執行SDRAM測試


% p) D' h' x' [8 D+ B$ P
但我用Quartus 7.0 的SOPC Builder重新Build後

  }. d7 ?8 `( L' q! V再Quartus II Compiler重作同樣實驗

卻會出現下列錯誤：

Using cable "USB-Blaster [USB-0]", device 1, instance 0x00
Pausing target processor: not responding.
; B' A2 {( _. k# l) }8 a' dResetting and trying again: OK
6 o& M2 ]& v( Y/ h, d/ }: Y  {6 pInitializing CPU cache (if present)
+ }6 L( D$ \  N. KOK
0 l) X  l, l, E0 S# z
! \4 B) x, M* a, Z9 aDownloading 00800020 ( 0%)
Downloading 00810000 (67%)
: p6 g( x9 w2 SDownloaded 95KB in 1.1s (86.3KB/s)

Verifying 00800020 ( 0%)
9 \, t' E* N: I# K; M- FVerify failed between address 0x800020 and 0x80FFFF
Leaving target processor paused
7 ~* `8 `# n) v0 k& {


! i7 |$ H/ [" i( k& i) Y

. t8 R- ^/ Y5 n) L3 b) P$ J( H很多文章說明PLL設-3 ns,也有專家說要改成-11ns~-18ns
/ C) F% B( S- N3 i: i
& Z' h7 A; Z# g) V0 Y我試過還是不行
. `  q% [0 T* m
& n" k; |: `& y& d9 C3 l+ k可否請問是軟體問題？