Execute FreeRTOS from RAM
Hi all
I’m using ARM9_STR91X_IAR project , and I can execute it from FLASH successfully .
Now I want to copy the image from flash to ram and execute it from ram .
I have IAP bootloader to do copy work then jump to ram .
There is a link file : lnkarm_flash.xcl
I don’t know how to modify it to support execute from ram .
Thanks.
Execute FreeRTOS from RAM
This is an IAR file. Take a look in your IAR installation directory for a RAM equivalent.
Dave.
Execute FreeRTOS from RAM
I refer some example file lnkarm_ram.xcl in the IAR installation directory . And I modify the FreeRTOS’s lnkarm_flash.xcl of the following :
// Code memory in flash
//-DROMSTART=0x00000000 Marked by Paul 96.4.25
//-DROMEND=0x00080000 Marked by Paul 96.4.25
//-DROMSTART=0x00080000
//-DROMEND=0x003FFFFF
//-DVECSTART=ROMSTART Marked by Paul 96.4.25
// Data memory
-DRAMSTART=0x4000000
-DRAMEND=0x04018000
-DROMSTART=RAMSTART
-DROMEND=RAMEND
….
But when I make my workspace , it will generate some errors during linking :
Building configuration: RTOSDemo – ARM
Updating build tree…
Linking
Error[e16]: Segment DATA_Z (size: 0x123c8 align: 0x2) is too long for segment definition. At least 0x68e3 more
bytes needed. The problem occurred while processing the segment placement command
"-Z(DATA)DATA_I,DATA_Z,DATA_N=RAMSTART-RAMEND", where at the moment of placement the available
memory ranges were "CODE:400c51a-4018000"
Reserved ranges relevant to this placement:
4000000-4000107 INTVEC
4000108-400035b ICODE
400035c-400a1cb CODE
400a1cc-400a1e3 INITTAB
400a1e4-400aa2b DATA_ID
400aa2c-400bcd0 DATA_C
400bcd1-4018000 DATA_I
Total number of errors: 1
Total number of warnings: 0
Execute FreeRTOS from RAM
You are now putting your executable code and data both in RAM and there is not enough space.
Execute FreeRTOS from RAM
My Board only have 96 KBytes SRAM . So if I want put executable code and data both in RAM , it must need more then 96 KBytes of SRAM ?