TMS320F2800137: Combine on board flash option data into Hex file for use with UniFlash

Hi Paul,

1) Regarding combining OTP fields in to the image: Please search for "How can we program a field in USER OTP?" in this FAQ: https://e2e.ti.com/support/microcontrollers/c2000-microcontrollers-group/c2000/f/c2000-microcontrollers-forum/951668/faq-faq-on-flash-api-usage-for-c2000-devices 

The DCSM tool also should allow you to configure these fields - did you try that?  I can loop our DCSM tool expert if needed.

2) Regarding combining two executables:  The C28x assembly tools manual’s (www.ti.com/.../spru513) sub-chapter “The Load Image Format” has information on this from our compiler team.  You can do something like: hex2000   --load_image    -o combined.out  prog1.out  prog2.out

You can generate the hex file for the combined out file in a separate invocation of the hex2000.

Thanks and regards,
Vamsi 

Thanks for those tips.  I have a follow up issue with the RETAIN pragma.  I am using eabi, so found I need RETAIN to keep the OTP sections from being dropped.  But RETAIN is generating warnings or errors for me.  Can you advise if I have the syntax, correct?  Iwas able to get the solution working by using the variable in code to trick the linker - but I don't really like that solution, it may break under optimization.

in the top on mian.c->

//OTP options
#pragma DATA_SECTION (Z1_BOOTCTRL_value,"BOOT_section")
volatile const long Z1_BOOTCTRL_value = 0x12345678;
#pragma RETAIN('BOOT_section')

gives me warning (and the section is dropped):
#1923-D too many characters in character literal -- extra leading characters ignored main.c /flash_kernel_sci line 34 C/C++ Problem
#830-D error processing pragma RETAIN, verify format main.c /flash_kernel_sci line 34 C/C++ Problem

I've tried " and ' to enclose the section name.

here is the copy of .cmd file:

MEMORY /* modifiied back to FLASH mode 6/14/2023*/
{
BEGIN : origin = 0x00080000, length = 0x00000002
// BOOTVER : origin = 0x00080002, length = 0x00000004 //bootware version string
BOOT_RSVD : origin = 0x00000002, length = 0x00000126
RESET : origin = 0x003FFFC0, length = 0x00000002

RAMM0 : origin = 0x00000128, length = 0x000002D8
RAMM1 : origin = 0x00000400, length = 0x000003F8
// RAMM1_RSVD : origin = 0x000007F8, length = 0x00000008 /* Reserve and do not use for code as per the errata advisory "Memory: Prefetching Beyond Valid Memory" */

RAMLS0 : origin = 0x00008000, length = 0x00002000
RAMLS1 : origin = 0x0000A000, length = 0x00001FF0
BOOT_L_KEY : origin = 0x0000BFF0, length = 0x08
BOOTVER : origin = 0x0000BFF8, length = 0x08
// RAMLS1_RSVD : origin = 0x0000BFF8, length = 0x00000008 /* Reserve and do not use for code as per the errata advisory "Memory: Prefetching Beyond Valid Memory" */

/* OTP Boot control */
Z1_BOOTCTRL_OTP1 : origin = 0x078208, length = 0x04

/* Flash sectors */
FLASH_BANK0_SEC_0_7 : origin = 0x080008, length = 0x2FF0 /* on-chip Flash <<< all bootloader code goes here END = 0x083000 */

//reserve most flash space for the application
// FLASH_BANK0_SEC_8_15 : origin = 0x082000, length = 0x2000 /* on-chip Flash */
// FLASH_BANK0_SEC_16_23 : origin = 0x084000, length = 0x2000 /* on-chip Flash */
// FLASH_BANK0_SEC_24_31 : origin = 0x086000, length = 0x2000 /* on-chip Flash */
// FLASH_BANK0_SEC_32_39 : origin = 0x088000, length = 0x2000 /* on-chip Flash */
// FLASH_BANK0_SEC_40_47 : origin = 0x08A000, length = 0x2000 /* on-chip Flash */
// FLASH_BANK0_SEC_48_55 : origin = 0x08C000, length = 0x2000 /* on-chip Flash */
// FLASH_BANK0_SEC_56_63 : origin = 0x08E000, length = 0x2000 /* on-chip Flash */
// FLASH_BANK0_SEC_64_71 : origin = 0x090000, length = 0x2000 /* on-chip Flash */
// FLASH_BANK0_SEC_72_79 : origin = 0x092000, length = 0x2000 /* on-chip Flash */
// FLASH_BANK0_SEC_80_87 : origin = 0x094000, length = 0x2000 /* on-chip Flash */
// FLASH_BANK0_SEC_88_95 : origin = 0x096000, length = 0x2000 /* on-chip Flash */
// FLASH_BANK0_SEC_96_103 : origin = 0x098000, length = 0x2000 /* on-chip Flash */
// FLASH_BANK0_SEC_104_111 : origin = 0x09A000, length = 0x2000 /* on-chip Flash */
// FLASH_BANK0_SEC_112_119 : origin = 0x09C000, length = 0x2000 /* on-chip Flash */
// FLASH_BANK0_SEC_120_127 : origin = 0x09E000, length = 0x1FF0 /* on-chip Flash */

// FLASH_BANK0_SEC_127_RSVD : origin = 0x0A0FF0, length = 0x0010 /* Reserve and do not use for code as per the errata advisory "Memory: Prefetching Beyond Valid Memory" */
}

SECTIONS
{
codestart : > BEGIN

.version : > BOOTVER
// .text : >> FLASH_BANK0_SEC_0_7, ALIGN(8)
.cinit : > FLASH_BANK0_SEC_0_7, ALIGN(8)
.switch : > FLASH_BANK0_SEC_0_7, ALIGN(8)
.reset : > RESET, TYPE = DSECT /* not used, */
.stack : > RAMM1

.bootkey : > BOOT_L_KEY

BOOT_section : > Z1_BOOTCTRL_OTP1

#if defined(__TI_EABI__)

Hi Paul, 

I am out of office currently.  I will be able to review and get back to you in couple of days. Thank you.

Thanks and regards,
Vamsi