Part Number: TMS320F280025C
Hi
I am having a problem copying parts from the flash to the ram. i looked on several guides that you have:
*TI Linker Command File Primer - TI Linker Command File Primer
* Running an Application from Internal Flash Memory on the TMS320F28xxx DSP.
*TMS320F28002x Flash API
*Copying Compiler Sections From Flash to RAM on the TMS320F28xxx DSCs
unfortunately, i am still having trouble. every time i try one of the methods of copying, my program stuck before main or somewhere in illegal operation trap.
scenario 1:
example1
{
file1.obj
file2.obj
} > FLASH_BANK0_SEC2
myfunc1 : LOAD = FLASH_BANK0_SEC2, RUN = RAMLS4
this isn't working. i use the #pragma CODE_SECTION to run my functions and i can see they have been copied but the program getting stuck too. by the way my program is written in cpp.
scenario 2:
example2
{
file1.obj
file2.obj
} LOAD = FLASH_BANK0_SEC2
RUN = RAMLS4,
LOAD_START(MyfuncsLoadStart),
LOAD_SIZE(MyfuncsLoadSize),
LOAD_END(MyfuncsLoadEnd),
RUN_START(MyfuncsRunStart),
RUN_SIZE(MyfuncsRunSize),
RUN_END(MyfuncsRunEnd),
ALIGN(8)
this option isn't working. the program get stuck.
another question about this scenario: when using the symbols inside the LOAD_START, LOAD_SIZE and etc. i need to declare them inside my code?
you have an example with .TI.ramfunc :
.TI.ramfunc : LOAD = FLASH_BANK0_SEC1
RUN = RAMLS4,
LOAD_START(RamfuncsLoadStart),
LOAD_SIZE(RamfuncsLoadSize),
LOAD_END(RamfuncsLoadEnd),
RUN_START(RamfuncsRunStart),
RUN_SIZE(RamfuncsRunSize),
RUN_END(RamfuncsRunEnd),
ALIGN(8)
the symbols RamfuncLoadStart, RamfuncsLoadSize and etc. they are declared inside the code.
when i try to use them again for my sections, i will get a warning "absolute symbol redefined".
i guess i don't understand the proper use for them.
another few points:
* the file "f28002x_codestartbranch.asm" is added to my project.
* when my program is running from ram it works. see example linker file below:
codestart : > BEGIN, ALIGN(8) .text : > RAMLS5 | RAMLS6 | RAMLS7, ALIGN(8) .cinit : > RAMLS4, ALIGN(8) .switch : > RAMLS4, ALIGN(8) .reset : > RESET, TYPE = DSECT /* not used, */ .stack : > RAMM1 .init_array : > RAMLS4, ALIGN(8) .bss : > RAMLS4 .bss:output : > RAMLS4 .bss:cio : > RAMGS0 .const : > RAMLS4, ALIGN(8) .data : > RAMLS4 .sysmem : > RAMLS4
* when my program is running from flash it works. see example linker file below:
codestart : > BEGIN, ALIGN(8)
.text : >> FLASH_BANK0_SEC2 | FLASH_BANK0_SEC3 | FLASH_BANK0_SEC4, ALIGN(8)
.cinit : > FLASH_BANK0_SEC1, ALIGN(8)
.switch : > FLASH_BANK0_SEC1, ALIGN(8)
.reset : > RESET, TYPE = DSECT /* not used, */
.stack : > RAMM1
.init_array : > FLASH_BANK0_SEC1, ALIGN(8)
.bss : > RAMLS4
.bss:output : > RAMLS4
.bss:cio : > RAMGS0
.const : > FLASH_BANK0_SEC1, ALIGN(8)
.data : > RAMLS4
.sysmem : > RAMLS4
//.TI.ramfunc : > RAMGS0
ramgs0 : > RAMGS0
/* Allocate IQ math areas: */
IQmath : > RAMLS4
IQmathTables : > RAMLS4
.TI.ramfunc : LOAD = FLASH_BANK0_SEC1
RUN = RAMLS4,
LOAD_START(RamfuncsLoadStart),
LOAD_SIZE(RamfuncsLoadSize),
LOAD_END(RamfuncsLoadEnd),
RUN_START(RamfuncsRunStart),
RUN_SIZE(RamfuncsRunSize),
RUN_END(RamfuncsRunEnd),
ALIGN(8)
Thanks
Yoav
