ARMmbed
/
mbed-os
mirror of https://github.com/ARMmbed/mbed-os.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity

Vector table must be 256 aligned 

The vector table must be 256 aligned to work reliably, it must have been working by accident up to now.  This modification tested on a u-blox c027 board.  Without the change the value of `SCB->VTOR` and int_table are as follows:

`SCB->VTOR 0x10000280, int_table 0x100002a0`

...with the change they are as follows:

`SCB->VTOR 0x10000400, int_table 0x10000400`

...and the test passes.

See issue:

https://github.com/mbedmicro/mbed/issues/992
pull/994/head
Rob Meades 2015-03-23 14:58:30 +00:00
parent d1d900d30c
commit 04d5c19e69
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
libraries/tests/mbed/vtor_reloc/main.cpp
View File

@ -14,7 +14,7 @@ DigitalOut out(PIN_OUT);
DigitalOut myled(LED1);
volatile int checks = 0;
uint32_t int_table[NUM_VECTORS];
uint32_t int_table[NUM_VECTORS] __attribute__ ((aligned(256)));
#define FALLING_EDGE_COUNT 5