Hi all,
Recently i have made a flash driver and export it as a hex file,i take hexadecimal data in the file into a global array 'g_flashDriverRAM' and change the array g_flashDriverRAM to a function pointer.
Later i excute the function pointer to do erase flash and write flash funtion,it can work well.The flash memory can be modified as i want.However,when i copy the data in g_flashDriverRAM to a new array 'g_flashDriverRAM1' and change it to function pointer to excute,it case a hardfault. I have check that the data in g_flashDriverRAM is same as g_flashDriverRAM1,i can change g_flashDriverRAM to function pointer to excute erasing and writing flash function but can not work when i use g_flashDriverRAM1.
I also try to copy the data in g_flashDriverRAM to a assigned RAM address and change the assigned RAM address as a function pointer to excute,it also can not work.
The main different of g_flashDriverRAM and g_flashDriverRAM1 is that g_flashDriverRAM has initialized when declaration but g_flashDriverRAM1 does not initialize when declaration.I check the map file and found that g_flashDriverRAM is store in .data segment and g_flashDriverRAM1 is store in .bss segment.
Follow figure are some part of my code:
(1)define two array, g_flashDriverRAM is initialized and g_flashDriverRAM1 is not initialized
(2)check the map file after compliering,it can be found that g_flashDriverRAM is store in .data segment and g_flashDriverRAM1 is store in .bss segment.
(3)change the g_flashDriverRAM to function pointer and excute erasing and writing flash operation,it can work well,however when copy the data in g_flashDriverRAM to g_flashDriverRAM1 and do the same operation,it cause hardfault.
Is there anything i forget to configure or any fault operation i have made?Can you tell me how to solve this problem?
Thanks and Best Regard,
Leo
please have a try below methods.
1.change pointer to same with g_flashDrvierRAM
g_pFlashDriverAPIRAM = (tFlashDriverAPIInfo *)g_flashDriverRAM1;
g_pFlashDriverAPIRAM->pfFLASH_DRV_EraseSector = (tpfFLASH_DRV_EraseSector) ((uint32)g_flashDriverRAM1-1+(uint32)(g_pFlashDriverAPIRAM->pfFLASH_DRV_EraseSector));
g_pFlashDriverAPIRAM->pfFLASH_DRV_Program = (tpfFLASH_DRV_Program) ((uint32)g_flashDriverRAM1-1+(uint32)(g_pFlashDriverAPIRAM->pfFLASH_DRV_Program));
2. try set g_flashDriverRAM to .data sector.
Define any initial value, which will allocate g_flashDriverRAM to the .data section
uint8_t g_flashDriverRAM1[1424] = {0,1,2,3,4};
I have tested the above two methods, but for some reason they are not successful every time.
Hi Senlent,
The attachment of this message is my project,you can used it to reproduce the problem.
You can use the three line code to operate flash normally.
You can use the three line code to reproduce the problem.
