PIC24EP512GU810无法分配超过28K的数据存储器

大家好，我对我的项目中的数据内存有一些问题。我做了一篇关于这个的文章（http://www. McCys.com /论坛/ M96803.ASPX），但是我正在创建另一篇文章，因为我现在从另一个角度看问题。基本上，我需要在FO中分配更多的数据内存。RM OFA 1K字符数组（虽然我相信确切的数字并不重要）。从DasBoADI可以看到我使用26K（49%）可用内存。在声明新数组之后，编译过程失败，链接错误：无法定位数据内存（在前一篇文章中的明确描述）。PosSeLeLY，大小为500，编译工作很好，但是程序得到了一个StAdStage异常（我仍然需要知道）。现在，在学习了数据表和家庭参考手册之后，我需要有人来确认我理解的是否正确：我有几个语言字符串AR。射线保存在PROG内存中的自动PSV管理（下面的例子）从家庭参考手册我的PIC应该有52K字节的RAM，其中上限32千字节[…]可以可选地映射到任何16K字程序空间页，这将是PSV页面机制（HTTP:/WW1.MICC）粗略地说，Adess空间是这样组织的：从0x00到0x0FFF，我保留了SFR空间（4K）——从0x0100到0x7FFF，它是可用的RAM（28 K）——从0x8000到0xFFFF，它是扩展内存，可选地DMA或PSV，我的问题主要是：如果我是HAVEPSV阵列是否意味着我只能使用第一个28字节的数据存储器？这就是为什么我不能分配更多内存的原因吗？如果是的话，有没有办法禁用PSV并使用整个52K？可能仍然在程序内存中保存我的语言字符串吗？长话短说，我可能现在意识到我的可用内存比我要少得多，我希望有人能确认它。



      以下为原文

    Hello everyone,
I'm having a few problems with the data memory in my project.
I made a previous post about this (http://www.microchip.com/forums/m976803.aspx), but I'm creating another because I'm now seeing the problem from another perspective.
Basically, I need to allocate more data memory, in the form of a 1K char array (though I believe the exact number is not important). From the dashboard I can see I used 26K (49%) of the available memory.
After declaring the new array
volatile unsigned char           ReceivePacket_UART4aa[1000];

the compilation process fails with a linker error: could not allocate data memory (explicit description in the previous post).

Possibly unrelelated, with a size of 500 the compilation works fine, but the program gets a StackAddress exception (wich I still have to figure out).

Now, after studying the datasheet and family reference manual I need someone to confirm if what I understand is correct:
I have several Language string arrays saved in the prog memory with automatic psv management (example below)
__psv__ const LANGUAGE_STR_STATO_16 ITA_table_stato_16[NUMBER_STATO+1+1] __attribute__((space(psv))) =
{ ... };

from the family reference manual my PIC should have 52K bytes of RAM, of which

The upper 32 Kbytes [...] can optionally be mapped into any16K word program space page

and that would be the psv page mechanism (http://ww1.microchip.com/...iceDoc/70000613d.pdf).

Roughly speaking, the addess space is organized like this:
- from 0x0000 to 0x0FFF I have reserved SFR space (4K)
- from 0x0100 to 0x7FFF it's usable RAM (28K)
- from 0x8000 to 0xFFFF it's extended memory, optionally DMA or PSV dedicated

My question basically is: if I have psv arrays does that mean I can only use the first 28 Kbytes of data memory? Can that be the reason why I can't allocate any more memory?
And if so, is there a way to disable psv and use the whole 52K? Possibly while still saving my Language strings in program memory?

Long story short, I might be realizing just now that my available memory is much less than I though, and I want someone to confirm it.