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Forum Index : Microcontroller and PC projects : Desperate need of help dm3.1 and dm mini

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Olimex
Senior Member

Joined: 02/10/2011
Location: Bulgaria
Posts: 226
Posted: 02:25pm 01 Apr 2012
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Hi
being busy with Embedded World then with the new iMX233-OLinuXino I had no much time to look in the DM firmware issue with the COM ports.
Today I had some time and fixed COM1-COM4 these had typos in the port definition files.
Sent HEX to Don, Mick and co to do test as I have no Mite-tester at home, but I guess everything is fine, at least my scope say so.
I Monday I will put the new firmware and the sources at GitHub and let Frank add the CAN support on the new fixed firmware.
Thanks for your patience with the firmware issues, but Ken was busy to work on some commercial projects and had no time to fix these too.
I'll have to work some on the User manual too, as there are too many new commands and features which are not documented.
Hopefully everything will be in order next week :)
Tsvetan
 
vk4tec

Senior Member

Joined: 24/03/2012
Location: Australia
Posts: 239
Posted: 09:16pm 01 Apr 2012
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Tsvetan

Can you help me with a question

I am trying to match up the COM ports on the DuinoMite Mini PIC32 with what is on the schematic.

I even have the PCB open in EAGLE.

When you say COM1 - COM4 , do you mean USART 1-4 on PIC32 ?

Andrew Rich VK4TEC
Andrew Rich VK4TEC
www.tech-software.net
 
Olimex
Senior Member

Joined: 02/10/2011
Location: Bulgaria
Posts: 226
Posted: 04:00am 02 Apr 2012
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Hi Andrew,

COM1 and COM2 are software bit banged UART left as legacy from Maximite on these PINs:

PIN.13 = COM1 RX
PIN.14 = COM1 TX
PIN.15 = COM1 RTS
PIN.16 = COM1 CTS
PIN.17 = COM2 RX
PIN.18 = COM2 TX

note that max baud rate these COM ports work is 19200 bps

COM3 and COM4 are implemented by Ken and are not available in MM-BASIC to the best of my knowledge

COM3 is real UART2 on PIC32 and is available on UEXT connector

UEXT.3 = COM3 TX
UEXT.4 = COM3 RX

COM4 is real UART5 on PIC32 and is available on DB9 connector with RS232 levels on Mega and also is available on

PIN11 = COM4 RX
PIN12 = COM4 TX

COM3 and COM4 teorethically can work with up to 2 000 000 bps IIRC, but I never try to more than 115200 bps

 
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