Unity internal UART wiring

Nick_Leet3D · December 8, 2020, 11:55pm

Found the Github link to the VESC tool. I am using 5.01 firmware. I need to just find out where this is set and compile a new firmware but I see the firmwares listed in the folder and are .bin

trelensis · December 9, 2020, 6:51am

The firmware repo is here :

And the baudrate is defined in here (search for HW_UART_P_BAUD, line 51) :

github.com

vedderb/bldc/blob/master/hwconf/hw_unity.h

/*
	Copyright 2016 Benjamin Vedder	benjamin@vedder.se

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
#ifndef HW_UNITY_H_
#define HW_UNITY_H_

#define HW_NAME									"UNITY"

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Nick_Leet3D · December 10, 2020, 12:07am

So I changed the value reconciled and went to custom file and wrote it. Not my unity is not responding and I can’t shut off the board and had to pull the connector. I think it’s bricked

Nick_Leet3D · December 10, 2020, 12:24am

So I changed this value. for 51.

Then did a rebuild_alll

Copied unity/VESC_default.bin to my windows machine
Loaded 2.06 VESC_Tool
Read all defaults
Firmware - Custom Files - Load VESC_default.bin

Device wont shut off with the bottom and had to pull the battery connector. I have ordered a STM link now as I think something is messed up of course.

Any thoughts?

Nick_Leet3D · December 10, 2020, 1:00am

https://codeshare.io/5eA6pr

trelensis · December 10, 2020, 8:47am

Sorry, never built the firmware, not sure if there is anything specific to do to get it working.
I don’t think changing the baudrate would cause this kind of issues, so i assume there is something wrong with the build, but I can’t find anything obvious from the build log.
Maybe there is some other setting than the hw files to set in conf_general.h to get it works with the unity ?

hexakopter · December 10, 2020, 10:14am

@Nick_Leet3D You commented out the define for HW6 in line 76/77 and commented in the defines for the Unity in lines 137/138 in conf_general.h?

github.com

vedderb/bldc/blob/master/conf_general.h

/*
	Copyright 2017 - 2019 Benjamin Vedder	benjamin@vedder.se

	This file is part of the VESC firmware.

	The VESC firmware is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    The VESC firmware is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
    */

#ifndef CONF_GENERAL_H_

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Edit.: Ah, you used the rebuild_all command. Please ignore the conf_general.h comment then. What arm-none-eabi-gcc are you using? There is a problem with newer ones. Last working version is the 2018-q2-update when I remember correctly.
With the newer version the firmware compiles fine, but when flashed to a VESC it reboots all the time.

Nick_Leet3D · December 10, 2020, 3:22pm

I am using the following as per the github repo

export PATH="$PATH:/Users/your-name/gcc-arm-none-eabi-8-2019-q3-update/bin/"

Nick_Leet3D · December 12, 2020, 12:56am

Alright got the 5.1 back on it for now wed to figure this thing out with the baud rate of this port and what I’m doing wrong

Nick_Leet3D · December 14, 2020, 4:33am

Made boot loader and uploaded along with the firmware only for unity with the baud rate change and latest arduino and same issue.

trelensis · December 14, 2020, 6:54am

Did you try to downgrade your gcc ?

Nick_Leet3D · December 14, 2020, 1:34pm

I’ll try it I used the latest as well I’ll give it a shot today

Nick_Leet3D · December 14, 2020, 7:10pm

got it working i think it was also due to the privacy issues with macos and the initial makes, i deleted the files in the build folder and remade it also using the older version of gcc. If you want the virmware I can link it later today after i test it with USB flashing. It is 5.1 VESC firmware and specific unity firmware

Nick_Leet3D · December 15, 2020, 5:55pm

Here it is. I was not able to test the USB flashing method as I flashed it with STM Utility. I had to get the board together quicly for a group ride so I totally forgot about this but the firmware is here if you want to try it at your own risk. https://drive.google.com/file/d/1CWJm1vjGLt5ibuZacPBKtxW8DWP-Bwzl/view?usp=sharing

Nick_Leet3D · December 16, 2020, 2:12pm

@trelensis what are you using for a connector for the header? I have header pins currently with a 3 pin jst and a solo no connector for the other wire.

trelensis · December 16, 2020, 2:41pm

I’m not sure what header you are talking about but for the maytech remote receiver I’m using, I have a standard f-f 3 pin Dupont connector for the ppm (I removed the plastic jst connector on the unity, leaving only the pins so the Dupont connector can go right on the pins).
For the telemetry I only need 2 wires from the uart so I’m using this kind of splittable f-m Dupont ribbon

Edit: Ok just checked what a header connector is, didn’t know it was called that way, so yeah, I just splt 2 wires from the ribbon.

Nick_Leet3D · December 20, 2020, 6:10pm

Cool did you get it working?

Clunt · December 25, 2020, 8:22am

Yeah, howd it go?
Im waiting on the post but I was hoping to break the ble comm port on my unity out to a usplit then to a unity model metr pro and a davegax mod.
Heard I’d run into a fixed baud rate issue then ended up here.
Keen to give it a go when everything is delivered. (Still waiting on both usplit and metrpro)

Cheers guys

Clunt · December 25, 2020, 8:25am

Keen to know if this has been flashed by usb as I don’t have stm link yet?

trelensis · December 25, 2020, 9:42am

Hey, sorry didn’t had time to try and update my unity yet, I won’t be home for a few days i’ll try it when i’m back.
I don’t have a stm link either, so i hope it’ll go ok