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[FreeRTOS Home] [Live FreeRTOS Forum] [FAQ] [Archive Top] [April 2007 Threads] Execute FreeRTOS from RAMPosted by Paul on April 25, 2007 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.
RE: Execute FreeRTOS from RAMPosted by Nobody/Anonymous on April 25, 2007 This is an IAR file. Take a look in your IAR installation directory for a RAM equivalent.
Dave.
RE: Execute FreeRTOS from RAMPosted by Paul on April 25, 2007 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=0x00080000Marked by Paul 96.4.25 //-DROMSTART=0x00080000 //-DROMEND=0x003FFFFF //-DVECSTART=ROMSTARTMarked 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
RE: Execute FreeRTOS from RAMPosted by Nobody/Anonymous on April 25, 2007 You are now putting your executable code and data both in RAM and there is not enough space.
RE: Execute FreeRTOS from RAMPosted by Paul on April 25, 2007 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 ?
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