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Old 03-17-2009, 12:51 PM   #871 (permalink)
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I've noticed in the code there are a lot of seemingly unused "display spaces." Such as in the example below:

Code:
void doDisplayBigTank()    {bigNum(tank.mpg(),"TANK","MPG ");}
I realize that it's not a lot of space, but I found 20 or 30 of them. Every byte counts? Shrunk from 14194 to 14172.

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Old 03-17-2009, 02:01 PM   #872 (permalink)
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Problem is some of those spaces "erase" what might have been there before, so you could wind up with something like "MPG0" displayed instead of "MPG ".
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Old 03-17-2009, 02:42 PM   #873 (permalink)
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Quote:
Originally Posted by dcb View Post
Problem is some of those spaces "erase" what might have been there before, so you could wind up with something like "MPG0" displayed instead of "MPG ".
I'll go back through. Some of them I think can be taken out. Ones that are on the titles for the screens, they only flash on the display and then go out. certainly they don't need trailing spaces.
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Old 03-17-2009, 03:07 PM   #874 (permalink)
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I don't think the bootloader adds to the stability of the prebuilt one. I mean to have this code sitting there waiting to overwrite the flash when the power comes on or is flakey is a recepie for trouble. I think I will go ahead and reclaim that 2048 bootloader bytes with a define and possibly use an older version of the compiler to reclaim the space. I will look into leaving it as a single source file that will compile with arduino0011 by default, but that isn't the priority. I will do the appropriate define when I build if so, and use the usbtinyisp to program them, and add some more features finally. So programming with an arduino will still work, but if you can figure out an ISP programmer you can load the extra features (and they will start shipping with the pre-built by default)

The features I'm looking at are (and they could easily take up 2k)
1. metric option (setup might stay US, but day to day display will be metric)
2. slope option for injector direction
3. pulse threshold reject feature (i.e. this pulse is abnormally long so get rid of it) or otherwise sort that out.
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Last edited by dcb; 03-17-2009 at 04:02 PM..
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Old 03-18-2009, 12:18 AM   #875 (permalink)
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Built the MPGuino from the plans above using the Arduino with USB and DC power input jack.

Downloaded the version 11 software, copied the program sketch from the googlecode archive, hooked up to my Mac Mini with the usb cable and wallwart power. All seems good until the message:
Sketch too big - Binary sketch size: 14346 bytes (of a 14336 byte maximum)

Where can we cut out 10 bytes???

Thanks dcb, you have done an awesome job!

Phil A.
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Old 03-18-2009, 12:25 AM   #876 (permalink)
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Thanks man, The avr compilers are not in a good way for cross platform consistency. I have to compile on XP using arduino 0011. I'm guessing you have a Mac.
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Old 03-18-2009, 12:39 AM   #877 (permalink)
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Here's a quick one, just comment out the guts of simpletx so it doesn't send data out the tx pin.

PHP Code:
#define myubbr (16000000/16/9600-1)
void simpletxchar string ){
/* if (UCSR0B != (1<<TXEN0)){ //do we need to init the uart?
    UBRR0H = (unsigned char)(myubbr>>8);
    UBRR0L = (unsigned char)myubbr;
    UCSR0B = (1<<TXEN0);//Enable transmitter
    UCSR0C = (3<<UCSZ00);//N81
 }
 while (*string)
 {
   while ( !( UCSR0A & (1<<UDRE0)) );
   UDR0 = *string++; //send the data
 }*/

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Old 03-20-2009, 09:19 AM   #878 (permalink)
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Added the info to the wiki. I didn't see the files in the repository yet, but maybe you posted here and then went off to upload them?
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Old 03-27-2009, 02:31 PM   #879 (permalink)
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New smaller bootloader on the block...

http://spiffie.org/know/arduino_1k_bootloader/
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Old 04-20-2009, 09:09 PM   #880 (permalink)
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Quote:
Originally Posted by dcb View Post
03/19/2009
updates for v0.80

No functional changes, but from .80 on there will be a mpguino.cpp file added to the repository.
I can't find the 0.80 code -- could someone please post it to the repository?

This is what I find in the repository right now:

Code:
MPGUINO.brd	22.0 KB	r76	Sep 19, 2008	davebr...@prodigy.net
MPGUINO.sch	247 KB	r76	Sep 19, 2008	davebr...@prodigy.net
mpguino.pde	37.3 KB	r121	Feb 02, 2009	davebr...@prodigy.net
wiring.GIF	30.5 KB	r19	Jul 04, 2008	davebr...@prodigy.net
Or... am I in the wrong place?

I got my MPGuino from spiffie.org and it came with 0.80 installed already, but I am looking for the source...

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