MPC5605B sdata issue

曾经怀念 — Fri, 23 Jun 2017 02:45:03 GMT

Hi all,

I create two project. one run in flash, the other run in ram.

and copy the ram prj .bin file to flash prj uint16_t array, and running it

(lcf : internal_ram org = 0x40000000, len = 0x2000

stack org = 0x40004000, len = 0x1000)

main(void)

{

(* function)() /* jump to ram prj mian addr 0x40006382 */

//would not come back here

while(1)

{

}

in ram prj

(lcf: internal_ram: org = 0x40006000, len = 0x8000

stack: org = 0x4000E000, len = 0x1000)

main(void)

{

uint16_t uiDummyRead;

const uint16_t uiDataSize = sizeof( A ) / sizeof( B );

while (1)

{

uiDummyRead = uiDataSize ;

}

download flash prj and running, found that the uiDataSize is wrong, and the @uiDataSize is 0x400003bc

this addr is the flash prj's sdata addr

.sdata2 400003bc 00000000 00002800 00005000 00005000 0

the ram flash prj's sdata addr

.sdata2 40006854 00000000 00000710 0 00000000

so i change the type of uiDataSize to rodata, then the problem solved.

const uint16_t __attribute__((section(".rodata")))uiDataSize = sizeof( A ) / sizeof( B );

what is the cause of the problem????

Original Attachment has been moved to: Test_Prj.rar

topic MPC5605B sdata issue in MPC5xxx