TheBackShed.com

Forum Index : Microcontroller and PC projects : MM+: Display an 800x480 image in <1s

Page 2 of 2

Author

Message

matherp
Guru

Joined: 11/12/2012
Location: United Kingdom
Posts: 8605

Posted: 03:33pm 21 May 2018

Copy link to clipboard

Print this post

Quote Will try extra settings, many Thanks in advance.

Details of the options are given in the fourth tutorial and are essential to use static stringsEdited by matherp 2018-05-23

TrevorH
Senior Member

Joined: 06/04/2018
Location: United Kingdom
Posts: 142

Posted: 09:40am 23 May 2018

Copy link to clipboard

Print this post

Thanks for your help on options, that did it and now works perfectly.

I am still not able to get DrawBitmap working, instead of putting text characters on the screen it only puts a line on screen at the x and y.
I don't really understand how the DrawBitmap routine works ( you did say it was more complicated than DrawRectangle).

Trevor

TrevorH
Senior Member

Joined: 06/04/2018
Location: United Kingdom
Posts: 142

Posted: 09:14am 15 Jun 2018

Copy link to clipboard

Print this post

@matherp

Hi, you have used the CFunction in this thread to create many different variants and as you know it is the basis for my CPLD driver.

Can you please tell me what determines whether you create a CFunction or a CSub. Since this routine can have many uses how do you decide how many arguments to pass for each individual usage or is this explained already somewhere and I have missed it, If so I apologise in advance.

Trevor.

matherp
Guru

Joined: 11/12/2012
Location: United Kingdom
Posts: 8605

Posted: 09:43am 15 Jun 2018

Copy link to clipboard

Print this post

Quote Can you please tell me what determines whether you create a CFunction or a CSub

Same answer as if the code was in Basic - Functions return an answer.
What may confuse is that when CFunctions were initially introduced there were only functions. CSubs came later so some of the earlier examples would be functions when they were really subs

Quote Since this routine can have many uses how do you decide how many arguments to pass for each individual usage

Don't really understand the question. Number of arguments is totally dependent on the specific application and is tailored to suit. There is a limit of 10 in the MMBasic handling so if more needed then you need to use arrays.

Edited by matherp 2018-06-16

TrevorH
Senior Member

Joined: 06/04/2018
Location: United Kingdom
Posts: 142

Posted: 10:16am 15 Jun 2018

Copy link to clipboard

Print this post

I suppose the first question is a bit vague as I knew already about returns etc, but after some experimenting I have found that the loadable used doesn't seem to auto load as a library part if I create it as a CSub.

As far as the arguments go I know how to use SSD1963 as Initialisation using "i=SSD1963(1,6,7) but I haven't seen any examples of the other 9 commands available to this Cfunction. In each case I assume they take different numbers of parameters. I think I don't understand how this works.

Sorry to be a pain, I clearly have a lot to learn.

Trevor.

matherp
Guru

Joined: 11/12/2012
Location: United Kingdom
Posts: 8605

Posted: 11:31am 15 Jun 2018

Copy link to clipboard

Print this post

Quote but I haven't seen any examples of the other 9 commands available to this Cfunction.

There is one example in the Basic program attached on page 2 of the thread

Page 2 of 2

Print this page

To reply to this topic, you need to log in.