I have made an implementation in C++ on an Ubuntu system (Intel processor) using the gcc compiler. Now I ran exactly the same code on the F28335 and got another result. Only a third of the returned signal values (every third index) seem the same.
Any thoughts on what may have happened? I've had some memory issues with a too small stack, but it executes and returns so it should be ok. Do big/small endian make a difference?
Below is my memory configuration, in case there is a problem with that.
MEMORY
{
PAGE 0 :
/* BEGIN is used for the "boot to SARAM" bootloader mode */
BEGIN : origin = 0x000000, length = 0x000002 /* Boot to M0 will go here */
RAMM0 : origin = 0x000050, length = 0x0003B0
RAML0 : origin = 0x008000, length = 0x0039D0
RAML1 : origin = 0x00B9D0, length = 0x000040
RAML2 : origin = 0x00BA10, length = 0x000040
RAML3 : origin = 0x00BA50, length = 0x000040
ZONE7A : origin = 0x200000, length = 0x00FC00 /* XINTF zone 7 - program space */
CSM_RSVD : origin = 0x33FF80, length = 0x000076 /* Part of FLASHA. Program with all 0x0000 when CSM is in use. */
CSM_PWL : origin = 0x33FFF8, length = 0x000008 /* Part of FLASHA. CSM password locations in FLASHA */
ADC_CAL : origin = 0x380080, length = 0x000009
RESET : origin = 0x3FFFC0, length = 0x000002
IQTABLES : origin = 0x3FE000, length = 0x000b50
IQTABLES2 : origin = 0x3FEB50, length = 0x00008c
FPUTABLES : origin = 0x3FEBDC, length = 0x0006A0
BOOTROM : origin = 0x3FF27C, length = 0x000D44
PAGE 1 :
/* BOOT_RSVD is used by the boot ROM for stack. */
/* This section is only reserved to keep the BOOT ROM from */
/* corrupting this area during the debug process */
BOOT_RSVD : origin = 0x000002, length = 0x00004E /* Part of M0, BOOT rom will use this for stack */
RAMM1 : origin = 0x000400, length = 0x000480 /* on-chip RAM block M1 */
RAML4 : origin = 0x00BA90, length = 0x000040
RAML5 : origin = 0x00BAD0, length = 0x0040F0
RAML6 : origin = 0x00FBC0, length = 0x000400
RAML7 : origin = 0x00FFC0, length = 0x000040
ZONE7B : origin = 0x20FC00, length = 0x000400 /* XINTF zone 7 - data space */
}
SECTIONS
{
/* Setup for "boot to SARAM" mode:
The codestart section (found in DSP28_CodeStartBranch.asm)
re-directs execution to the start of user code. */
codestart : > BEGIN, PAGE = 0
ramfuncs : > RAML0, PAGE = 0
.text : > RAML0, PAGE = 0
.cinit : > RAML0, PAGE = 0
.pinit : > RAML0, PAGE = 0
.switch : > RAML0, PAGE = 0
.stack : > RAML5, PAGE = 1
.ebss : > RAMM1, PAGE = 1
.econst : > RAML6, PAGE = 1
.esysmem : > RAMM1, PAGE = 1
.cio : > RAMM0, PAGE = 0
