- DDR型号为MT41K512M16HA-125IT,容量为8Gb,现在贴了4片,总共4GB;看了规格书DDR数据空间是从0x80000000开始到0xffffffff的2GB空间,但是我们有4GB大于2GB的应该如何测试呢?有没有类似的例程。原理图见附件。




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可以通过MPAX进行地址映射,请下载下面的K1_STK_v1.1.zip例程。\K1_STK_v1.1\common\KeyStone_DDR_Init.c里有MPAX地址映射代码可以参考。
https://e2echina.ti.com/support/processors/f/processors-forum/47664/faq-keystone1
关于地址的映射可以参考下面的user guide。
7.3 XMC Memory Protection and Address eXtension (MPAX)
https://www.ti.com.cn/cn/lit/ug/sprugw0c/sprugw0c.pdf