Linux/AM4376: Software development on Linux host system for custom board

Dhara Pandya

Part Number: AM4376
Other Parts Discussed in Thread: PROCESSOR-SDK-AM437X, TPS65218, AM4372

Tool/software: Linux

Hi,

I have designed a custom board with TI AM4376 interfacing LCD, DDR, SD card and USB, SPI and I2C protocols. The card is under layout and manufacturing phase.

Meanwhile, I want to start the software development for the same card on my linux machine (Ubuntu 16.04, LTS- 64bit). I have already installed CCSv7.0 and linux SDK package ()

Now how can I start configuring the SPI, I2C and USB interfaces on CCSv7.0..??

I have developed an application using MSP430 on CCSv6.0, so in this AM4376 processor development , the hardware configuration shall be done the same way by configuring the registers..??

Can any one please guide how to start the software development in AM4376 on Linux host machine..?

over 8 years ago

0 Pavel Botev over 8 years ago

TI__Guru**** 170625 points

Hi Dhara,

First you should decide which SDK exactly you will use (will fit your project requirements):

- PROCESSOR-SDK-LINUX-AM437X
- PROCESSOR-SDK-LINUX-RT-AM437X
- PROCESSOR-SDK-RTOS-AM437X

If you choose PROCESSOR-SDK-LINUX or PROCESSOR-SDK-LINUX-RT, you can start from the below wiki:

processors.wiki.ti.com/.../Processor_SDK_Linux_Software_Developer’s_Guide

If you choose PROCESSOR-SDK-RTOS, refer to the below wiki:

processors.wiki.ti.com/.../Processor_SDK_RTOS_Software_Developer_Guide

See also below training materials:

www.ti.com/.../support

Regards,
Pavel

0 Dhara Pandya over 8 years ago in reply to Pavel Botev

Expert 1220 points

Hi Pavel,

Thanks for the links. I am already referring this link..

processors.wiki.ti.com/.../Processor_SDK_Linux_Software_Developer’s_Guide

I have decided to use PROCESSOR-SDK-LINUX-AM437X with my custom design.
I am concern about how should I configure the interfaces of processor..?? I2C and SPI..??

In controller we can configure the respective registers and initiate it our main code and add its ISR..

Can you please share a sample code for configuring once such interface (I2C/ SPI/ USB) for AM437X processor..?

Thanks & Regards,
Dhara

0 Pavel Botev over 8 years ago in reply to Dhara Pandya

TI__Guru**** 170625 points

Dhara,

We have already source code working for I2C, SPI, USB etc. It comes with the PSDK 3.03.

You have AM437x custom board. Is your custom board based on some of the AM437x TI boards (EVM, StarterKit, IDK)?

From what I understand, you need to run PSDK 3.03 on your custom board, please confirm? This is called "porting", and you do not have to write I2C/SPI/USB drivers from scratch.

For a start, you can refer to the AM437x TI EVM schematics and software to see how I2C is handled there (in u-boot and linux kernel). AM437x TI EVM use I2C0 (0x44E0B000) to connect TPS65218 PMIC, Board ID memory (EEPROM) etc. See the below pointers regarding AM437x TI EVM:

www.ti.com/.../tmdsevm437x

www.ti.com/.../spruhw7.pdf

The u-boot files describe I2C connections are:

ti-processor-sdk-linux-am437x-evm-03.03.00.04/board-support/u-boot-2016.05/arch/arm/dts/am4372.dtsi
ti-processor-sdk-linux-am437x-evm-03.03.00.04/board-support/u-boot-2016.05/arch/arm/dts/am437x-gp-evm.dts
ti-processor-sdk-linux-am437x-evm-03.03.00.04/board-support/u-boot-2016.05/board/ti/am43xx/board.c

You should modify/adjust these files to match you hardware design, as these are used for the AM437x TI EVM board.

The I2C driver (it is generic, should not be modified unless bug is found or new feature would be implemented) is located at:

ti-processor-sdk-linux-am437x-evm-03.03.00.04/board-support/u-boot-2016.05/drivers/i2c/omap24xx_i2c.c

See also below e2e thread:

e2e.ti.com/.../577924

Regards,
Pavel

0 Dhara Pandya over 8 years ago in reply to Pavel Botev

Expert 1220 points

Hi Pavel,

I have referred this schematic of General Purpose board for AM437X (www.ti.com/.../TMDXEVM437X ) for custom board design.

I found the U-boot files in the paths you mentioned above. They are not falling in the exact path but still I can figure out a little.

I will go through the training series video for porting U-boot and Linux. I will be receiving my fabricated custom board till middle of June, after which I will be actually be able to load the codes and analyse.

Thanks for reply.

Regards,
Dhara

0 Pavel Botev over 8 years ago in reply to Dhara Pandya

TI__Guru**** 170625 points

Dhara,

You can also explore the below wiki pages:

processors.wiki.ti.com/.../Linux_Core_U-Boot_User's_Guide
processors.wiki.ti.com/.../Linux_Kernel_Users_Guide
processors.wiki.ti.com/.../Processor_Linux_SDK_Top-Level_Makefile
processors.wiki.ti.com/.../Processor_SDK_Linux_Getting_Started_Guide
processors.wiki.ti.com/.../Processor_SDK_Linux_Training:_Hands_on_with_the_Linux_SDK
processors.wiki.ti.com/.../AM437x_DDR_Configuration_and_Programming_Guide

Regards,
Pavel

0 Dhara Pandya over 8 years ago in reply to Pavel Botev

Expert 1220 points

Hi Pavel,

I have only these two files in the 'dts' folder: kconfig and Makefile

< /opt/ti-processor-sdk-linux-am437x-evm-03.02.00.05/board-support/u-boot-2016.05+gitAUTOINC+6c5519b6fc-g6c5519b6fc/dts >

There are no other files in 'dts' like the ones you mentioned in earlier post.

../dts/am4372.dtsi
../dts/am437x-gp-evm.dts

Is the SDK installation in this host machine done properly..? How can I validate this..?

I have installed this AM437x Linux SDK Essentials, on my Linux Ubuntu 16.04 LTS (64bit ) machine, from this link
(software-dl.ti.com/.../index_FDS.html)

I will develop the code on this host machine and use memory card version to load it on the custom board.

Regards,
Dhara

0 Pavel Botev over 8 years ago in reply to Dhara Pandya

TI__Guru**** 170625 points

Dhara Pandya said:
I have only these two files in the 'dts' folder: kconfig and Makefile

< /opt/ti-processor-sdk-linux-am437x-evm-03.02.00.05/board-support/u-boot-2016.05+gitAUTOINC+6c5519b6fc-g6c5519b6fc/dts >

Please install and use ti-processor-sdk-linux-am437x-evm-03.03.00.04 (not ti-processor-sdk-linux-am437x-evm-03.02.00.05). Download and install ti-processor-sdk-linux-am437x-evm-03.03.00.04-Linux-x86-Install.bin file

The path is u-boot-2016.05/arch/arm/dts, NOT u-boot-2016.05/dts.

Regards,
Pavel

0 Dhara Pandya over 8 years ago in reply to Pavel Botev

Expert 1220 points

Hi Pavel,

Thanks for the support. I will download the SDK

PROCESSOR-SDK-LINUX-AM4376 03_03_00_04 from this link ( AM437x Linux SDK Essential: http://software-dl.ti.com/processor-sdk-linux/esd/AM437X/latest/index_FDS.html )

I also want to ask one more query. Can we write the processor AM4376 code in Python..??

Are the python libraries supporting this device available..??

Regards,

Dhara

0 Pavel Botev over 8 years ago in reply to Dhara Pandya

TI__Guru**** 170625 points

Dhara,

I think python is supported in user space only (application level), see the software manifest file:

software-dl.ti.com/.../software_manifest.htm

See also the below e2e threads:

e2e.ti.com/.../512297
e2e.ti.com/.../573021

Regards,
Pavel

0 Dhara Pandya over 8 years ago in reply to Pavel Botev

Expert 1220 points

Hi Pavel,

I downloaded the SDK "PROCESSOR-SDK-LINUX-AM4376 03_03_00_04" and found the header files in the path you mentioned.

I also referred the TI threads you shared, but these are for TI AM335X processors used on beagle bone black board. It uses the ADAfruit libraries for this processor which consist hardware description for AM335x processor ( github.com/.../Adafruit_GPIO )

If python libraries are available for AM4376, then I can merge with the rest of the codes..

Regards,
Dhara

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Linux/AM4376: Software development on Linux host system for custom board