Noob - My Vocore is not starting [Solved]

[Neochange]

Hello,

I have started playing with vocore and I am coming here to find some answers

I have followed the starting tutorial with USB and the led in the boards turn on for a second when I connect the cable but it does not remains lighted and then the board heats up.

Is it a normal behaviour at starting? I haven't seen the vocore wifi but maybe I am not waiting the needed time.

Thanks

[Vonger]

Hi, maybe there is something wrong when boot up, please connect VoCore with USB2TTL, check it log from computer, then we will know what is happening there.

[Neochange]

I am going to test with a power supply instead of the usb cable and then I will use the TSB2TTL cable.

I hope I could find out what is happening...

Thanks!

[Neochange]

Hi, maybe there is something wrong when boot up, please connect VoCore with USB2TTL, check it log from computer, then we will know what is happening there.

I have attached the response I got through the USB2TTL cable. Should I reflash?

[Vonger]

Looks like the firmware is deleted, you can use uboot recover it, please read http://vocore.io/wiki/index/id:14 (uboot-kermit part)

[Neochange]

Well I have downloaded a Vocore firmware from http://vonger.cn/upload/ ( the vocore.v1.0.bin )

and I am trying to upload the bin file to the board throught kermit. I open a terminal to the board and execute the command loadb as the tutorial says.

Then I use minicom to upload the file to the board with kermit. I tried to use kermit directly but if I press control-\ and the C nothing happens. When I try to upload the file everything seems OK but I got the error:

putty.png (2.41 KiB) Viewed 25827 times

And this is the Kermit log while it is trying to upload the file:

Kermit.png (66.04 KiB) Viewed 25827 times

After that, the error count raise and the communication interrupts.

[Vonger]

The UART connection is not stable, so it failed, do you have a dock? so you can connect to ethernet and download by tftp.

[Neochange]

The UART connection is not stable, so it failed, do you have a dock? so you can connect to ethernet and download by tftp.

I solved!

The uart connection was not stable because I "forgot" ( not really forgot, i didn't know it) to connect the ground cable to the board through the UART port. Log session looked good but when I tried to upload the file, it was failing all times. With the GND cable connected the transmission was OK and I could upload the binary.

I have learned more with these errors than if the board was correctly setup XD

thanks for your patience