Method to returns RAM load from point 0x80000000 devices Spark processor 7162 to accept Soft Rescue
Firstly Until the rights of their owners are done, this is a way for Dr. Hazem Tamim in one of the forums
We thank him for this great work
In some cases spark 7162 not accept soft rescue in any way by flash or by cisco tftp
And the smaller file is loaded only mImage, and when the largest file is loaded, the userfsub stops at approximately 65% . Flashing stops on the screen and nothing happens.
"Cause of the problem "
The device is downloading files into the device's RAM
It then loads it Into the ROM's internal memory
It is assumed that it starts from a certain point in Ram, which is 0x80000000
For an unknown reason, this point becomes 0x8c000000
The available memory space to download the files becomes smaller than required, so the smaller file is successfully downloaded and the larger file is not loaded,
"The solution"
Is to make the device returns load from the first point 0x80000000
"Used tools"
1- hyperterminal Loader
2- Inverted RS232 cable
3- Com port for desktop or USB TO RS232
"The method of work"
1- We make sure that the usb to rs232 id on the computer and know its port number
2- We connect the receiver to the computer by cable with the link and shut down the device from the back
3- We open the hyperterminal after installing it and follow the next steps very carefully (the port number and settings in the following image) and then click OK
Bit per second = 115200
Data bits = 8
Parity = None
Stops bits = 1
Flow controll = None
Write spark, choose the icon, then OK
fter selecting your country, the city code you live in, and the port number, click OK
4- You will see a blank program page and the B100 screen with the receiver
5- Click the menu button on the receiver and open the receiver from the back. The writing will appear in the loader as shown in the image
6- You type command set load_addr 80000000 then press enter
PDK7105> set load_addr 80000000
7- You type Save and press enter
PDK7105> save
When we are done, close the device from the back and open it again, then download the rescue soft in any way
Unfortunately, the pictures are not clear from the source, and I will try to get clearer pictures if I can
# In post 19
2 GIF pics for help more from brother / angel_heart
