MTTTY High CPU Usage

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joepasquariello
Posts: 85
Joined: Mon Apr 28, 2008 7:32 am

MTTTY High CPU Usage

Post by joepasquariello » Thu Apr 21, 2016 5:21 pm

I'm using MTTTY on Windows 7 to program a MOD5213. MTTTY is rather non-responsive, using about 25% of the CPU once I connect to a USB serial port, and it crashes when I press Disconnect. Programming of the MOD5213 is unreliable due to these problems. I have the NB USB driver installed. Am I forgetting something?

Joe

rnixon
Posts: 833
Joined: Thu Apr 24, 2008 3:59 pm

Re: MTTTY High CPU Usage

Post by rnixon » Fri Apr 22, 2016 9:16 am

Are you programming the module in the development board? That is the only time the netburner usb driver would be used. If you have a usb dongle that you purchased and put on your computer it will use it's own manufacturers usb driver. It is in that driver that the problem will exist. You may want to try a different one, or as a test, trt some other serial terminal than mttty and see if the results are different.

joepasquariello
Posts: 85
Joined: Mon Apr 28, 2008 7:32 am

Re: MTTTY High CPU Usage

Post by joepasquariello » Fri Apr 22, 2016 11:23 am

No, I am programming a module on a custom board, and the USB/serial converter is plugged into a USB port of my laptop. Thanks for the clarification on the NB USB/Serial driver being for use with the device on the development boards.

My problem turned out to be a very old USB/serial converter that, even with the latest (Prolific) drivers, is somehow incompatible with Windows 7-64 and MTTTY. I switched to a newer USB/serial converter with FTDI chip, and MTTTY works fine, with less than 1% CPU while transferring a file to the MOD5213. It's odd that my own application, communicating with the same MOD5213 via the same USB/serial converter, had no problem with the older converter, though at lower baud rate.

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