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Forum Index : Microcontroller and PC projects : ASCII Video Terminal
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palcal Guru  Joined: 12/10/2011 Location: AustraliaPosts: 1965 |
Thanks for the info John I will see what I can do. Paul. "It is better to be ignorant and ask a stupid question than to be plain Stupid and not ask at all" |
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| Grassy Newbie  Joined: 06/07/2014 Location: AustraliaPosts: 12 |
I have a late model Dell "all in one" PC with composite input and a small Samsung LCD TV also with composite input. Using V1.2 of the firmware I found the Terminal worked on the Samsung but not the Dell. However I have another problem. I was hoping to use the Terminal to make a small battery powered Terminal and display unit that I could reprogram the uMite out in the field with. I would be using one of those small composite panels shown in the original SC article. I find that in VGA mode I can reprogram the uMite by pressing F4 just as I would with a PC connected. However in composite mode when I press F4 most of the program being edited disappears off the screen. I tried changing the number of lines to 15 using the OPTION LINES command and now I can see the program but I still cannot edit it. For example if I press backspace then all characters following the insertion point are wiped out. Am I assuming too much and the Terminal isn't designed to be used in this way. Edit: I think I answered my own question. I found that it works if I set the number of lines to 14. |
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| WhiteWizzard Guru Joined: 05/04/2013 Location: United KingdomPosts: 2927 |
Thats really useful to know about working with 14 lines as I was having the same issue. Thanks. WW |
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| palcal Guru Joined: 12/10/2011 Location: AustraliaPosts: 1965 |
Well I built up some more of the circuit so I can re flash the Micro, but have to wait till I get to town to buy a USB socket (one of the drawbacks of living on a tropical beach). However I think all my work may have been in vain because 'Print@' will not work from within my program so I won't be able to format the screen and I don't think I would be able to use the escape codes to change font size. I will see how far I get. I am waiting on a 4.3" screen from EBay as shown in the SC article and wanted to use it with a project. Paul. "It is better to be ignorant and ask a stupid question than to be plain Stupid and not ask at all" |
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| WhiteWizzard Guru Joined: 05/04/2013 Location: United KingdomPosts: 2927 |
@paul, No need to wait for a socket IF you have a 'spare' USB lead. Simply cut off the unwanted end and then solder the four inner cables of what is left directly to your circuit. Google colours to confirm D+ and D- (typically white and green but not always so). WW |
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| palcal Guru Joined: 12/10/2011 Location: AustraliaPosts: 1965 |
I thought of that but didn't want to ruin a cable I will be going to town on Wednesday. Paul. "It is better to be ignorant and ask a stupid question than to be plain Stupid and not ask at all" |
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| palcal Guru Joined: 12/10/2011 Location: AustraliaPosts: 1965 |
Well, I couldn't wait so I cut a USB cable and got it all connected up. Flashed the Micro with V1.2 no problem. All works well, and now I have played around with the escape codes I have found I can Print to the screen in any position and with any size font. So all is well. Thanks Geoff this is brilliant. Paul. "It is better to be ignorant and ask a stupid question than to be plain Stupid and not ask at all" |
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| WhiteWizzard Guru Joined: 05/04/2013 Location: United KingdomPosts: 2927 |
. . . .worth cutting that lead after all 
Are you connecting this currently to a MicroMite? If so, when you use editor (EDIT command), how well does the screen layout work? i.e. does the footer line (explaining function keys) wrap round over multiple lines? And when you scroll up/down in your code, does the scrolling work properly? Are you adjusting the OPTION LINES xx command? If so, what to? Thanks for any response - and well done for sticking with this!  |
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| palcal Guru Joined: 12/10/2011 Location: AustraliaPosts: 1965 |
@WW I am using a MicroMite but don't have a keyboard connected as yet. Paul. "It is better to be ignorant and ask a stupid question than to be plain Stupid and not ask at all" |
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| WhiteWizzard Guru Joined: 05/04/2013 Location: United KingdomPosts: 2927 |
I f I understand you correctly, you do have a keyboard connected so as to be able to program the MicroMite (i.e. using Tera Term via a USB to serial connector to the MicroMite?) When you type EDIT then the MicroMite will enter the EDITOR screen which will be sent to the ASCII terminal via the Rx/Tx lines between the MicroMite and the ASCII Terminal. Put another way, anything you type either on the Console keyboard (i.e. TeraTerm) OR type on the Terminal PS2 keyboard will be sent to the MicroMite and displayed on the screen(s). Also, any thing displayed on the TeraTerm Screen will also be displayed on the ASCII Terminal screen. Does the above make sense to you? So you don't need a physical PS2 keyboard connected directly to the ASCII Terminal to perform the tests in my previous post. Simply type within TeraTerm with the ASCII Terminal connected to the MicroMite. |
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| palcal Guru Joined: 12/10/2011 Location: AustraliaPosts: 1965 |
Yes that's correct I will look into it tomorrow. Paul. "It is better to be ignorant and ask a stupid question than to be plain Stupid and not ask at all" |
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| palcal Guru Joined: 12/10/2011 Location: AustraliaPosts: 1965 |
@WW I have not adjusted the OPTION LINES xx I ran this small snippet of code For x = 1 to 50:Print x:Next x and the numbers printed down the screen and scrolled correctly. I then added a ; after Print x and the numbers ran across the screen and wrapped around correctly. However when I loaded a larger program and used TerraTerm to EDIT it was all over the place and totally unusable. I think the problem is probably because the screen is not 80 characters wide. Paul. "It is better to be ignorant and ask a stupid question than to be plain Stupid and not ask at all" |
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| palcal Guru Joined: 12/10/2011 Location: AustraliaPosts: 1965 |
I am using this as a display for a project and it works well except I have a flashing cursor at the bottom of the display. Anyone know if I can get rid of the cursor. Paul. "It is better to be ignorant and ask a stupid question than to be plain Stupid and not ask at all" |
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TassyJim Guru Joined: 07/08/2011 Location: AustraliaPosts: 6220 |
I don't think you can hide the cursor but you might be able to position it to a more pleasing location. Jim VK7JH MMedit |
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| palcal Guru Joined: 12/10/2011 Location: AustraliaPosts: 1965 |
It not only spoils the display but it also scrolls up one line, which I can prevent with a ; after the last PRINT but that looks even worse. I will try your idea and see if I can move it to a more pleasing position. Paul. "It is better to be ignorant and ask a stupid question than to be plain Stupid and not ask at all" |
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