Hi,

Thank you Chuck Davenport and Amit about your answers.

Sorry, i had to mention that before.
My program is a web server like the example "enet_lwip". I put it on the external SDRAM but seems to be to slow : i never get the IP et the time to link is arround 1 min (I think the routeur is making timeout).

1.2. So I want to put the exective program on the internal flash and only the page's file (~95% of the size of my program) on the external SDRAM. Like that I should (in theory) have a good time response and a working project. The size's project is to important for the internal memory.

3. To do that is used pragma before each tab in the enet_fsdata.h : #pragma DATA_SECTION (data_wall1_jpg,"miqro")
On the cmd i have :
#define APP_BASE 0x00010000
#define RAM_BASE 0x20000000

/* System memory map */

MEMORY
{
/* Application stored in and executes from internal flash */
FLASH (RX) : origin = APP_BASE, length = (0x00100000-APP_BASE)
//Web page in external memory
FLASHEXT (RX) : origin = 0x60000000, length = 0x00200000
/* Application uses internal RAM for data */
SRAM (RWX) : origin = 0x20000000, length = 0x00040000

}
/* Section allocation in memory */

SECTIONS
{
.intvecs: > APP_BASE
.text : > FLASH
.const : > FLASH
.cinit : > FLASH
.pinit : > FLASH
.init_array : > FLASH

miqro : > FLASHEXT

.vtable : > RAM_BASE
.data : > SRAM
.bss : > SRAM
.sysmem : > SRAM
.stack : > SRAM
}

__STACK_TOP = __stack + 2048;


The memory browser of the project put fine the page on the external SDRAM memory and the main program on the internal flash.


4. I tried but i got a 1.5Gb .bin file. Huge size because the "gap" in memory between the internal and the external flash (from 0x00010000 to 0x60200000 ~1500 Mb). I tried to bootload it on the SDcard but here i have an other problem : I'm unable to make the bootloader works with the function ROM_FlashProgram().
Anyway the bin file is to important comparate at the size of the program and in have no idea how to make 2 bin files.

The hex file format supports the gap and i have a 1.5Mb hex file but i don't know which format take for this hex file and how to program it.


I hope i was enought clear on my explinations.

Best regards,
John

Hi Amit,

I want to add that overhead because i want to separate my program on two parts, one part on the internal memory and the other part on the TM4C129SDRAMNVM extansion. When i make the bin file of the project like that i have a bin file with a size of 1.5GB. This size is normal because i have a big gap of memory between the internal memory (0x00000) and the external memory (0x60000000). 

The format .hex is supporting gap like that. So with the same project i have a hex file with a size of 1.5MB and a bin file with a size of 1.5GB.

The bootloader doesn't supports this big bin file and that's not good anyway. So i wanted to bypass that problem on programming with hex file but ... as you said

Amit Ashara said:

The embedded firmware in TM4C129x would still need to convert the hex file into bin.

So i guess that will not solve my problem because my hex file will be convert on huge bin file again and will not work.

Your point on it should be usefull :)

Plus this kind of project should be usefull to other developpers i guess.

Best regards,

John

Thank you to answer (again :) )

I'm a bit confused here. If I understood well, if I erase the ligne on the hex file which contains the regions of memory, it should work.
But .... How can i find this line ? i oppenned it with a textreader but seems understable. Maybe i took the wrong output format (i tried with the TI's formats).
And, if i do it, the program will not be separate, it will be on one bloc then no ?

Regards,
John

Hi,

Do you have a battery for your SDRAM? if so you can expect to load the SDRAM only once; otherwise the data for SDRAM should be kept also in flash and you want to move it to SDRAM every time you power on your board. Then prepare your data as a big aligned array (no matter where it is placed), then, move it to SDRAM since the starting address is fixed and known. Use a small trick to move: if the array is aligned, read four bytes at the time in a long word and drop it to the SDRAM as you need - word or byte can be obtained by shifting and masking without time penalty.

Take into account the EPI read involves at minimum three EPI clock cycles, which are ½ of CPU clock, so it is very slow (running from flash would be faster). 

Hello Amit,

I think I just understood what you propose to me. If i'm right, you are proposing to me to cut my hex file on two hex file and then to program the TM4C with them and he will be able to do the convertion on two bin files. Am I right ?

If I'm right i will have some more questions. What output format of hex file should I ask at the ARM hex utility (on project's properties) ? How to program these hex file, i didn't find any tool for hex, only for bin.

Best regards,
John

Hello Amit,

When i'm programming my lwip project on the internal flash, it's working well, but when i program the same project on the external SDRAM, the "link" step is seriously longer and after that the IP adress is never find. It's why I said it seems to be timeout but it's working well to you so .... i don't understand where can be my problem ... I tried the same with the example code and didn't work too. I have 1 minute on waiting for a link and after that i'm always on waiting for IP with both project.

The leds seems working well so the program isn't stuck.

Do you confirm it's all working with the example 2.1.2.111 ?

Regards,

John

Hello Amit,

You are right it's now working on my side too. Thank you about your explanations and the fix ! I'm grateful about that. 

Best regards,

John