Custom boot loader on LCDK 6748

Jing Song

Other Parts Discussed in Thread: OMAPL138, OMAP-L138

I'm trying to develop a secondary boot on LCDK 6748. May I use an emulator to do following steps?

1. create a mini project like hello world as application project. Using CCS to build this project to get .out file. Then use hex6x.exe to convert the .out file into hex file. Then using hex2bin.exe to convert hex file into binary file.

2. create a boot project. In general, I need to write the application binary file into flash, then in boot project, I need to copy the application into internal ram and run application. But I want to do in following way. Using fread function to read the application binary file into an allocated internal ram. Then jump to the entry point of the application. Also, I want to debug the procedure with emulator by loading the out file of boot project into the LCDK board.

Is it possible way to do it？

thanks,

Jane

over 9 years ago

0 Titusrathinaraj Stalin over 9 years ago

TI__Guru** 116100 points

Hi Jane,

I think, the starterware bootloader code would fulfill your requirements.

Could you please to refer the following TI wiki.

http://processors.wiki.ti.com/index.php/OMAPL138_StarterWare_Booting_And_Flashing

0 Jing Song over 9 years ago in reply to Titusrathinaraj Stalin

Prodigy 200 points

Hi Titusrathinaraj,

I'll try that. One question, does it work for LCDK c6748? Cause I see the title is "OMAPL138".

Another question.

Flashing the Application

Once you have generated both binary images (i.e. the AIS and bin files described above), you are ready to flash these images to the EVM's SPI flash memory. This can be done using the standard serial flasher utility that's included in the tools folder of the standard StarterWare installation:

Set the boot switches for UART2 boot (5:8 = 0011 on EVM) it seems different with the info in link http://processors.wiki.ti.com/index.php/L138/C6748_Development_Kit_(LCDK) , in the link it lists as below

what is the configuration for switches?

User Interface

Switches (SW1)

Switches 1-4 on SW1 are used to set the BOOT as follows:

Switch # UART2 NAND 16 MMC/SD0

1 OFF OFF OFF

2 ON ON OFF

3 OFF ON OFF

4 ON ON ON

Switches 5-8 on SW1 are user switches connected to GPIOs according to the table below. When the switch is ON, the pin is pulled low. When the switch is OFF, the pin is pulled high.

Switch # Pin

5 GPIO0[1]

6 GPIO0[2]

7 GPIO0[3]

8 GPIO0[4]

Switch #	UART2	NAND 16	MMC/SD0
1	OFF	OFF	OFF
2	ON	ON	OFF
3	OFF	ON	OFF
4	ON	ON	ON

Switch #	Pin
5	GPIO0[1]
6	GPIO0[2]
7	GPIO0[3]
8	GPIO0[4]

Run SFH from the command line:

$> sfh_OMAP-L138.exe -flash [bootloader].ais [application].bin

Power on or reset the EVM

The SFH tool may take several minutes to complete depending on the size of the application. When SFH completes successfully, your application is ready to boot.

thanks,

Jane

0 Titusrathinaraj Stalin over 9 years ago in reply to Jing Song

TI__Guru** 116100 points

Hi Jane,

Yes. You can use starterware bootloader for C6748 LCKD board too.

Install appropriate starterware package (C6748_StarterWare_1_20_04_01).

0 Shankari G over 9 years ago

TI__Mastermind 43955 points

Hi Jing Song,

A Similar query was already answered at the below thread. Please try out and tell us how it goes for you.

http://e2e.ti.com/support/dsp/omap_applications_processors/f/42/p/349268/1223040.aspx#1223040

Regards,

Shankari

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0 Norman Wong over 9 years ago in reply to Jing Song

Guru 26430 points

Custom bootloaders have been discussed before on this forum. Here is a few that I am familiar with:

http://e2e.ti.com/support/dsp/tms320c6000_high_performance_dsps/f/115/t/244700.aspx

http://e2e.ti.com/support/embedded/tirtos/f/355/t/297312.aspx

http://e2e.ti.com/support/dsp/omap_applications_processors/f/42/t/246851.aspx

I assume you want a custom bootloader to allow field programming or reprogramming without a change in boot modes. I am bit confused with your use case. The use of "fread" implies that you want to use the "emulation debug" boot mode or JTAG to load your hello app into RAM. As far As I know, the fread() is not available for other media like flash. You would have to write your own version of fread().

On the LCDK, SW1 numbers are reverse order of bit numbers of the boot mode and the switches are inverted or active low, ie. ~SW1[1]=BOOT[4], ~SW1[2]=BOOT[3], ~SW1[3]=BOOT[2], ~SW1[4]=BOOT[3].

SW1[8:1] BOOT[7:0]
00001010 00010100 UART2
00001110 00010000 NAND16
00001000 00011100 MMC
00000000 00011110 Emulation Debug

So, I think the wiki page looks correct.

0 Jing Song over 9 years ago in reply to Titusrathinaraj Stalin

Prodigy 200 points

Hi Titusrathinaraj,

I'm following the steps in OMAPL138 StarterWare Booting And Flashing.

1. using AIS gen to create the bootloader AIS file

boot mode - set to SPI0 flash

application file - set to C:\ti\C6748_StarterWare_1_20_04_01\binary\c674x\cgt_ccs\c6748\lcdkC6748\bootloader\Debug\boot.out

AIS file out - set to boot.ais

2. import the timer project given at ..C:\ti\C6748_StarterWare_1_20_04_01\build\c674x\cgt_ccs\c6748\lcdkC6748\timer" into CCS, build and generate the timerCounter.out.

3. Using out2rprc to Create the Application Binary out2rprc.exe timerCounter.out timerCounter.bin

4. On C6748 LCDK board,set the boot switches for UART mode(1:4 = 0101 on C6748 LCDK). Open teraterm and can get the "BOOTME" message.

5. By sfh utility, flash the two images, boot.ais and timerCounter.bin using the below command.

sfh_OMAP-L138.exe -flash boot.ais tmerCount.bin -targetType C6748_LCDK -p COM3

In this step, it stuck as doing Programing UBL into flash...

I also tried with emdaTest project, got the same problem. Do you know the reason?

thanks,

Jane

0 Shankari G over 9 years ago in reply to Jing Song

TI__Mastermind 43955 points

Hi Jing Song,

The C6748 LCDK board has only NAND flash in it. It doesnot have SPI. In SFH utility, if the flash type is not mentioned, by default it will consider SPI flash.

you have to mention the "-flashtype NAND" to make it work.

Use the command like below and let me know the result.

>sfh_OMAP-L138.exe -flash boot.ais tmerCount.bin -targetType C6748_LCDK -flashType NAND -p COM3

Other things from your screenshots:

1. And also, in the "AIS gen tool" select the BOOT mode field as "NAND flash"

2. check whether the name of the binary "tmerCount.bin" is correct. Because, in your fifth step you mentioned the name as "timerCounter.bin". (Spell check of the file name )

Regards,

Shankari

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0 Jing Song over 9 years ago in reply to Shankari G

Prodigy 200 points

Thanks Shankari,

The problem was solved. I also refer to the ais configuration in another post -- http://e2e.ti.com/support/dsp/omap_applications_processors/f/42/t/235049.aspx?pi301055=1

My purpose is to develop a my own boot loader. So, I guess I can modify the bootloader code under \C6748_StarterWare_1_20_04_01\bootloader and debug it with emulator, right?

Jane

0 Shankari G over 9 years ago in reply to Jing Song

TI__Mastermind 43955 points

Hi Jing Song,

I am glad to hear that your problem was solved.

Yes, you can modify the bootloader and debug through CCS using Emulator.

All the best,

Shankari.

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