About memcpy()
In SPRA958 there is a example named ‘The F2808_example_nonBIOS_flash.pjt’ as bellow breifly:
1, main_nonBIOS.c
………
#include "F2808_example.h"
….
void main(void)
{
……..
// Section secureRamFuncs contains user defined code that runs from CSM secured RAM
memcpy(&secureRamFuncs_runstart,
&secureRamFuncs_loadstart,
&secureRamFuncs_loadend - &secureRamFuncs_loadstart);
………..
} // end of main()
2, F2808_example.h
……..
extern Uint16 secureRamFuncs_loadstart;
extern Uint16 secureRamFuncs_loadend;
extern Uint16 secureRamFuncs_runstart;
……….
//--- end of F2808_example.h file
3, f2808_nonBIOS_flash.cmd
………
SECTIONS
{
………..
secureRamFuncs : LOAD = FLASH_ABCD, PAGE = 0 /* Used by InitFlash() in SysCtrl.c */
RUN = L0SARAM, PAGE = 0
LOAD_START(_secureRamFuncs_loadstart),
LOAD_END(_secureRamFuncs_loadend),
RUN_START(_secureRamFuncs_runstart)
}
//--- end of 2808_nonBIOS_flash.cmd
There are two question:
Q1:Why does function of memcpy() don’t declared implicitly using extern?
Q2:If need,should declare the memcpy() as:
extern void MemCopy(Uint16 *, Uint16 *, Uint16 *);
or as:
extern void MemCopy(Uint16 , Uint16 , Uint16 );
or others?
thank
