奇怪：C6726B的dMax寄存器不能写

2014-10-29 分类：C6000™单核阅读(208)

我们在试验C6726B的dMax功能时，发现dMax传输不能启动。进一步测试发现dMax的相关寄存器不能写入，代码如下：

#include <stdio.h>

void main ()

{

printf ("——-%x\n", (*(unsigned int*)(0x6000000C)));

(*(unsigned int*)(0x6000000C)) = 0x20;

printf ("——-%x\n", (*(unsigned int*)(0x6000000C)));

printf ("——-%x\n", (*(unsigned int*)(0x60000014)));

(*(unsigned int*)(0x60000014)) = 0x20;

printf ("——-%x\n", (*(unsigned int*)(0x60000014)));

printf ("——-%x\n", *((unsigned int*)0xF0000010));

*((unsigned int*)0xF0000010) = 0x1111;

printf ("——-%x\n", *((unsigned int*)0xF0000010));

}

输出信息如下：‍

——-0

——-3ffffffd

——-1111

求大神指点！‍

C672x有个ROM的patch，确保工程里加入了patch包。