AM4379: DDR-less MLO build issue

ravi rk

Intellectual 925 points

Part Number: AM4379
Other Parts Discussed in Thread: AMIC110

Hi,

We are working on AM4379 RAMLESS custom SOM.

Below are our board configuration

1. Our board don't have EEROM

2. Insted of SPI Flash we have eMMC and SDCard.

3. No card detect (CD) pin.

SDK version

1. ti-processor-sdk-rtos-am437x-evm-06.00.00.07-Linux-x86-Install.bin

2. pdk_am437x_1_0_15

For build MLO bootloader we used following command

cd /ti/pdk_am437x_1_0_15/packages/ti/starterware

make bootloader BUILDCFG=boot PLATFORM=am43xx-evm BOOTMODE=mmcsd USE_DDR=no

While compiling bootloader by we get following error

make[1]: *** No rule to make target '/home/aitheon/ti/pdk_am437x_1_0_15/packages/ti/starterware/examples/gcc/am43xx_boot_noddr.lds', needed by '/home/aitheon/ti/pdk_am437x_1_0_15/packages/ti/starterware/binary/bootloader/bin/am43xx-evm/gcc/bootloader_boot_mmcsd_noDDR_a9host_debug.out'. Stop.
make[1]: Leaving directory '/home/aitheon/ti/pdk_am437x_1_0_15/packages/ti/starterware/bootloader'
Makefile:151: recipe for target 'bootloader' failed.

Kindly help us to resolve this issue.

Regards,

Ravi

over 6 years ago

0 Rahul Prabhu over 6 years ago

TI__Guru** 116170 points

Ravi,

We currently support DDR-less booting only on AM335x/AMIC110 devices s specified in our software developer guide here:

http://software-dl.ti.com/processor-sdk-rtos/esd/docs/latest/rtos/index_Foundational_Components.html#building-the-bootloader

You can look for MACRO "DDRLESS" in the source found under pdk_am437x_1_0_13\packages\ti\starterware for reference for updates made to support this configuration. Also note that AM437x has more onchip memory as AM335x so you can opt to use the additional onchip memory.

You could also look at the app note provided here for guidance:

http://www.ti.com/lit/an/sprac45a/sprac45a.pdf

A detailed guide for porting TI SDK to custom board platform is provided here:

http://software-dl.ti.com/processor-sdk-rtos/esd/docs/latest/rtos/index_board.html#custom-board-addition

The guide walks users through the steps that are required on custom platforms that may have differences compared to TI Evaluation platform like absence of EEPROM and use of different pins/instance of a peripheral. Please review the document and let us know if you have further questions regarding this topic.

Regards,

Rahul

0 ravi rk over 6 years ago in reply to Rahul Prabhu

Intellectual 925 points

Hi Rahul,

I manage to build MLO and I can run and debug through JTAG.But through SD Card,board is not booiting.

SD Card formated with FAT32 and I copyed MLO, app and config in SD Card by refering this document http://www.ti.com/lit/an/sprac45a/sprac45a.pdf

Regards,

Ravi

0 Rahul Prabhu over 6 years ago in reply to ravi rk

TI__Guru** 116170 points

Ravi,

Can you connect to the A9 when the boot fails and check if the core is still executing in ROM or has it branched to code in OCRAM. Typically, TI evaluation platforms contain a personality EEPROM which is used by secondary boot loader to detect the boardID. Have you removed or hard coded this pick up your platform details.

The board porting for the most part has been explained here, this talks about removing board ID detect mechanism and changing pinmux and IO instance which may be useful to you

http://software-dl.ti.com/processor-sdk-rtos/esd/docs/latest/rtos/index_board.html#custom-board-addition

Additionally, we provide secondary bootloader debugging tips are provided here:

http://software-dl.ti.com/processor-sdk-rtos/esd/docs/latest/rtos/index_Foundational_Components.html#bootloader-debugging

Please review the porting guide and the bootloader debug guide and let us know if any of the guidance provides further insight into the boot issue on your custom platform.

Regards,

Rahul

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AM4379: DDR-less MLO build issue