when i download an application sometimes it ends up in a fault interrupt
the situation:
TI Cortex M4 TM4C1294NCPDT
IAR compiler (7.40.1)
user written bootloader with lwip-library to download a new application over network
no RTOS
the problem:
when I download an application with the bootloader it ends in a fault interrupt when the __iar_program_start() is called
if i start the same application at the same flash location (0x40000) using the debugger, it works fine
when i read the registers i get the following values:
HARD FAULT STATUS REG: Forced = 1
ICSR: Vector = 0x03
FAULT STATUS REGISTER: Invalid State = 1
PROGRAM STATUS REG: Thumb = 1
the problem seems to depend on the amount of memory used!!!
if i increase the size of an array it fails, otherwise i can start the downloaded code.
works:
"P2": 0x12cd0
P2 s0 0x20000000 0x4 <Init block>
.data inited 0x20000000 0x1 shuttle_flash.o [1]
.bss zero 0x20000004 0x12360 shuttle_flash.o [1]
.bss zero 0x20012364 0xc8 shuttle_flash.o [1]
.bss zero 0x2001242c 0x94 shuttle_flash.o [1]
.bss zero 0x200124c0 0x4 shuttle_flash.o [1]
.bss zero 0x200124c4 0x4 shuttle_flash.o [1]
.bss zero 0x200124c8 0x4 shuttle_flash.o [1]
.bss zero 0x200124cc 0x1 shuttle_flash.o [1]
.bss zero 0x200124cd 0x1 shuttle_flash.o [1]
.bss zero 0x200124ce 0x1 shuttle_flash.o [1]
.noinit uninit 0x200124d0 0x800 startup_ewarm.o [1]
- 0x20012cd0 0x12cd0
pui32Stack 0x200124d0 0x800 Data Lc startup_ewarm.o [1]
fails:
"P2": 0x12d60
P2 s0 0x20000000 0x4 <Init block>
.data inited 0x20000000 0x1 shuttle_flash.o [1]
.bss zero 0x20000004 0x123f0 shuttle_flash.o [1]
.bss zero 0x200123f4 0xc8 shuttle_flash.o [1]
.bss zero 0x200124bc 0x94 shuttle_flash.o [1]
.bss zero 0x20012550 0x4 shuttle_flash.o [1]
.bss zero 0x20012554 0x4 shuttle_flash.o [1]
.bss zero 0x20012558 0x4 shuttle_flash.o [1]
.bss zero 0x2001255c 0x1 shuttle_flash.o [1]
.bss zero 0x2001255d 0x1 shuttle_flash.o [1]
.bss zero 0x2001255e 0x1 shuttle_flash.o [1]
.noinit uninit 0x20012560 0x800 startup_ewarm.o [1]
- 0x20012d60 0x12d60
pui32Stack 0x20012560 0x800 Data Lc startup_ewarm.o [1]
