Reading and Writing Registers via devmem

Follow the procedure below to perform the debug.

Enter the /dev/mem virtual device support menu.
Figure 1. Reading and Writing Registers via devmem
Use the following commands to run your read or write operations.
- To read a register value from physical address "0x1304006c", execute the following command:
```
devmem 0x1304006c
```
- To write a register value to physical address "0x1304006c", for example, with the lower 8-bit as 0x5D, execute the following command:
```
devmem 0x1304006c 32 0x005b5c5d
```
  Then you can perform the above read command again to verify if your write operation is successful. The following code block shows the commands and returns.
```
#    devmem 0x1304006c  
OxOOSBSCOO
#    devmem 0x1304006c 32 0x005b5c5d  
#    devmem 0x1304006c  
0X005B5C5D
```