需帮助：LPC1788外扩SDRAM类似当做片内内存由CPU任意分配使用

发布于 2016-12-11 17:17:39 浏览：3704 订阅该版

3 个回答

bernard 2016-12-11

这家伙很懒，什么也没写！

kupier 2016-12-11

这家伙很懒，什么也没写！

>这个要做SDRAM的初始化吧，否则怎么能用

---

感谢回复 [s:157] ，
已经做了初始化了，SDRAM是没问题的，之前用其他系统时直接用分散加载文件就可以了，刚刚开始接触RTT，还不大熟悉，刚刚看到了初始化函数：rt_system_heap_init（），我将其改为了

```
rt_system_heap_init((void *)LPC_EXT_SDRAM_BEGIN, (void *)LPC_EXT_SDRAM_END);
```

然后UFFS就能初始化通过了，但报如下错误，还真在找原因：

```

| /
- RT -     Thread Operating System
 / |      2.1.0 build Dec 11 2016
 2006 - 2016 Copyright by rt-thread team
NAND Flash ID = 0xecda1095
NAND ID: 0xECDA
os  : system memory alloc 320 bytes
flsh: UFFS consume spare data size 10
os  : system memory alloc 20880 bytes
os  : system memory alloc 10480 bytes
os  : system memory alloc 32768 bytes
tree: found bad block 0
tree: found bad block 3
tree: found bad block 4
tree: found bad block 62
tree: found bad block 63
tree: found bad block 64
tree: found bad block 66
tree: found bad block 67
tree: found bad block 68
tree: found bad block 69
tree: found bad block 77
tree: found bad block 78
tree: found bad block 81
tree: found bad block 84
tree: found bad block 86
tree: found bad block 88
tree: found bad block 92
tree: found bad block 94
tree: found bad block 96
tree: found bad block 846
tree: found bad block 881
tree: found bad block 1050
tree: DIR 0, FILE 0, DATA 0
psr: 0x21000000
r00: 0x10005890
r01: 0x10000000
r02: 0xf8f80000
r03: 0x00000020
r04: 0xffffffff
r05: 0xffffffff
r06: 0xffffffff
r07: 0xffffffff
r08: 0xffffffff
r09: 0xffffffff
r10: 0xffffffff
r11: 0x00000000
r12: 0x00000000
 lr: 0x0000619f
 pc: 0x0000619e
hard fault on thread: init

thread  pri  status      sp     stack size max used   left tick  error
-------- ---- ------- ---------- ---------- ---------- ---------- ---
tidle    0x1f ready   0x00000040 0x00000100 0x00000040 0x00000020 000
tshell   0x14 ready   0x00000040 0x00001000 0x00000040 0x0000000a 000
init     0x0a ready   0x00000040 0x00000800 0x000002a0 0x00000002 000
led      0x0b ready   0x00000044 0x00000400 0x00000044 0x00000005 000
mem manage fault:
SCB_CFSR_MFSR:0x01 IACCVIOL 
```