[garybronson]

This was very helpful and i appreciate it very much. You are right, it is UART2. My schematic was incorrectly labeled as UART3. I can see the extra UART now. This did not solve my issue with the communication with the Atmega chip using Node-Red but at least I’m closer to the solution.

 

Thank You

[garybronson]

I’m afraid it made no difference. I also created a new VM using Virtualbox because my first VM was in VMWARE VSphere and i could not gain access to the SD card. The VM that I created in Virtualbox gave me SD Card access but i had the same “no such file or directory” error when running the command. I can use pwd by itself and it will print the current working directory.

When i run this –

export CC=?pwd?/gcc-linaro-6.4.1-2017.11-x86_64_arm-linux-gnueabihf/bin/arm-linux-gnueabihf-

and then run this to check it –
${CC}gcc –version

I get the error

I even typed in the full path instead of using ‘pwd’

I looked in the bin directory and there is no directory with the name “arm-linux-gnueabihf-” 

I’m not sure what the purpose of the export is but it looks like its creating a variable called  “CC” that is used in the calls to compile

 

 

 

 

 

 

• This reply was modified 6 years, 9 months ago by garybronson.

[garybronson]

I am having a problem with these steps

5. Configure and Build

– make ARCH=arm CROSS_COMPILE=${CC} distclean

– make ARCH=arm CROSS_COMPILE=${CC} am335x_evm_defconfig

– make ARCH=arm CROSS_COMPILE=${CC}

Do you have any tips?

 

[garybronson]

I went through the procedure to bypass the EEPROM. The procedure assumed a lot but i got through most of it. I installed an Ubunto VM and then figured out i needed to search for Terminal to run those commands that were listed. Then found out i had to install wget and git. I got up to step 5 and ran into a problem. I attached what was displayed in the terminal. Maybe i was supposed to change to a different directory or something. I’m a Windows guy so the direction needs to be fairly clear. Using ubuntu in a VM was painful to navigate but i have to do this.

• This reply was modified 6 years, 9 months ago by garybronson.

Attachments:

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   error.jpg
   

[garybronson]

What happens when i want to try a new BB Image later on? Do i or my customers need to go through this process every time or does the U-boot remain loaded locally?

[garybronson]

I just had a quick look at the provided links. It looks like i have to get down into the weeds to make this thing boot.

So, there is no easier way to do this?

[garybronson]

Oh. I misundertood i guess. I assumed i needed to connect to UART0 so i can write an ID to the EEPROM. I thought that was an option rather than patching images or boot loaders. Doing that seemed like a harder task to accomplish. So the only thing i accomplished here is to verify that the processor is working. I’ll look at the other options you provided.

[garybronson]

That was very helpful. I am getting “C” now. Now that i have that, what’s next? Since i’m using Putty, are there any special settings i need to make in the Putty configuration to allow me to run commands?

[garybronson]

I have a serial connection to UART0. My device has RS232 that connects to UART0 so i used that to connect. I connected at 9600 – 8-N-1 and software flow control. I wasn’t sure what the default Baud rate was going to be in this case. I launched Putty and prints an “@” first and then the letter “B” every few seconds. Does that mean anything to anyone? I tried to type in the terminal but it doesn’t respond to anything.

• This reply was modified 6 years, 9 months ago by garybronson.
• This reply was modified 6 years, 9 months ago by garybronson.
• This reply was modified 6 years, 9 months ago by garybronson.

[garybronson]

This thread basically describes the problem i am having also. My board is headless so i need to figure out how to program the EEPROM without a display port. I took a guess and ordered a USB to UART adapter –

Maybe that will get me into the EEPROM.

My board also has built in RS232 that maps to UART0 so maybe i can get to it using a USB to RS232 cable and Putty. I’m not completely sure so i thought i would post here to see if anyone had some other suggestions.

 

 

 

 

 

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