Define global variables unsigned int neww=0 in main.c
debug----->run------>refresh
Expressions display :
neww unknown Error: Memory map prevented reading 0x0000C001@Data
ps:error picture
my project：OV7725.zip
Hello,
The debugger memory map is blocking debugger access for those memory locations (that apply to those variables). There is a conflict between your linker command file and the debugger memory map. looks like what happened is that you are using a modified version of the default f28035.cmd file - you added this new section called RAML45 at 0xc000@DATA but the startup gel file (f28035.gel), which defines the debugger memory map, does not have the memory range specified as accessible.
See the below wiki article which explains this in more detail:
Thanks
ki
Hi,
Thanks for sending such detailed explanation. I opened the project and saw the exact same thing as you. Then I saw that .ebss is allocated to L4SARAM (address 0xC000) which the CCS debugger shows it as invalid memory.
This tells me the companion GEL file (automatically configured with the configuration) is not properly configuring this memory space. However, given this file is usually a precise reproduction of a device's available memory, I double-checked the error by opening the F28035 datasheet.
The datasheet memory map section shows, in fact, that this memory is not available (marked as reserved)
Therefore the problem is in your linker CMD file - you must reallocate the .ebss section to existing RAM on the device.
Hope this helps,
Rafael
