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Messages - apcalc
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1381
« on: July 07, 2010, 11:12:42 pm »
bwang, that was the problem. I had SCREEN_BYTES_SIZE+bytesOffset, which probably made it larger that it could handle. Thank you so much for your help, I feel so stupid when it is a simple error like this.  You might want to modify the utils.h/.c header to include functions for scrolling the screen up and down. Here are my (hopefully working ) modified versions:
void scrollScreenDown(char* scrbuf, char* tmpbuf, int lines)
{
int bytesOffset = 160 * lines;
int cpysize = SCREEN_BYTES_SIZE - bytesOffset;
memcpy(tmpbuf, scrbuf - bytesOffset, cpysize);
memcpy(scrbuf, tmpbuf, cpysize);
memset(scrbuf + cpysize, 0xFF, bytesOffset);
}
void scrollScreenUp(char* scrbuf, char* tmpbuf, int lines)
{
int bytesOffset = 160 * lines;
int cpysize = SCREEN_BYTES_SIZE - bytesOffset;
memcpy(tmpbuf, scrbuf + bytesOffset, cpysize);
memcpy(scrbuf, tmpbuf, cpysize);
memset(scrbuf + cpysize, 0xFF, bytesOffset);
}
[\code]
1382
« on: July 07, 2010, 09:41:24 pm »
I've been having a very odd bug with an Nspire C program. Every time I exit the program pressing ESC (for some reason my loss detection dosen't work) the calculator reboots (the emulator says "CPU Reset") (I have only tried this on the emulator). All of the other ASM programs I have on the emulator (ncaster, gbc4nspire, ndless demo) work correctly. Also in my code you will see that I have the loss detection commented out. When I have this part of the code, the calc reboots right after the dialog box displays. Here is the code:
#include <os.h>
#include "utils.h"
asm(".string \"PRG\"\n");
int main(void) {
char marker[32]={15,15,15,0,0,15,15,15,15,15,0,0,0,0,15,15,15,0,0,0,0,0,0,15,0,0,0,0,0,0,0,0};
short int leftx,length,ycord,lengthchange;
float spritepos;
char* scrbuf = (char*) malloc(SCREEN_BYTES_SIZE);
char* tempbuf = (char*) malloc(SCREEN_BYTES_SIZE);
showSimpleDialogBox("TI-Nspire Tunnel","TI-Nspire Tunnel\nWritten in C by Danny Clark\n\nUse the arrow keys to control ship");
clearScreen();
leftx=120,length=120,lengthchange=1000,ycord=0;
spritepos=180;
clearBuf(scrbuf);
for(ycord=0;ycord<SCREEN_HEIGHT;ycord++) {
horizontalline(scrbuf,0,leftx,ycord,0);
horizontalline(scrbuf,leftx+length,319,ycord,0);}
sprite(scrbuf,marker,150,236,8,4);
refresh(scrbuf);
leftx=120;
ycord=0;
while (!isKeyPressed(KEY_NSPIRE_ESC)) {
if (isKeyPressed(KEY_NSPIRE_LEFT)) {
sprite(scrbuf,marker,spritepos,236,8,4);
spritepos-=0.7;
sprite(scrbuf,marker,spritepos,236,8,4);}
if (isKeyPressed(KEY_NSPIRE_RIGHT)) {
sprite(scrbuf,marker,spritepos,236,8,4);
spritepos+=0.7;
sprite(scrbuf,marker,spritepos,236,8,4);}
sprite(scrbuf,marker,spritepos,236,8,4);
lengthchange--;
if (lengthchange==0) {length--;lengthchange=1000;}
scrollScreen(scrbuf,tempbuf,1);
horizontalline(scrbuf,0,leftx,ycord,0);
horizontalline(scrbuf,leftx,leftx+length,ycord,15);
horizontalline(scrbuf,leftx+length,319,ycord,0);
sprite(scrbuf,marker,spritepos,236,8,4);
refresh(scrbuf);
//if (getPixel(spritepos-1,ycord-3)||getPixel(spritepos+8,ycord-3)) {free(scrbuf);free(tempbuf);return 0;}
}
free(scrbuf);
free(tempbuf);
return 0;
}
Also, I don't have the code for the function horizontal line there but I am sure that is not the problem because it was defined and used well before I experienced this problem. This program was working fine earlier today, but I made a few small additons and now I have no idea what is causing this. Also, I made one small modification to the function "scrollScreen(". I changed the two signs in the function (+ to - and - to +) to make the screen go down instead of up.
1383
« on: July 07, 2010, 04:31:28 pm »
I wonder how calc84maniac did the menu in gbc4nspire? Did he do the text himself, or is it some sort of os call?
I don't think calc84maniac wrote his emulators in C. I think they are in ARM9 Assembly. When you look in the header file os.h there is a definition for a function named "printf". I wonder if this could be used for text, or maybe it just has not been written yet, just defined there?
1384
« on: July 07, 2010, 04:22:34 pm »
Unfortunately, apcalc, I read you unedited post, but now it's all sorted out, and I can play pong on my nspire. 
Thats great to hear! I was used to the way you draw sprites on the 89, so I just assumed it was the same way. Feel free to ask if you have any more questions!
1385
« on: July 07, 2010, 01:09:29 pm »
Declare a sprite like this: char sprite[32]={15,15,15,0,0,15,15,15,
15,15, 0, 0,0, 0,15,15,
15, 0, 0, 0, 0, 0, 0,15,
0 , 0, 0, 0, 0, 0, 0, 0};The number of elements in the array should be equal to the height*width of the sprite. Each element should be the color you want the pixel to be. Bwang's sprite drawing functoin takes the syntax: void sprite(char* scrbuf, char* sprite, int x, int y, int w, int h);Where scrbuf is the buffer, sprite is the spite you want to draw, x is the x coordinate of the sprite, y is the y coordinate, w is the width, and h is the heigth If you read my first, unedited post, please disregard it b/c some of the info was wrong.
1386
« on: July 07, 2010, 11:56:48 am »
I've got the buffering all figured out, but it seems like nmath.h is missing from the skeleton. When I tried to compile a program using line, I got an error saying nmath.h doesn't exist.
I am assuming that the abs( function is from nmath.h (that is the only one that did not "exist"). A simple solution would be to write your own abs( function, get rid of the "#include "nmath.h"" at the top and add your own abs( to the header. Here is a very basic one I wrote. I am sure that a smaller and faster version could be written: int abs(int x) {
if (x<0) {
x*=-1;
}
return x;
}
1387
« on: July 07, 2010, 06:08:41 am »
What type of pi is it? Blueberry, apple, mathematical? I like pi
1388
« on: July 06, 2010, 11:11:31 pm »
ON 68k and Nspire the boxes that appears when using Input ruins everything...
Nspire has a form of input?  How do I use it? I was trying to find a command for it, but none of the 83+ style input commands (Prompt , Input , getKey, etc.) existed.
It was added in OS 2.0. I forgot the command name and syntax, though.
On the Nspire, you can use the Request or RequestStr (I think) command for input. The syntax for both is: Request [Text to display in dialog box (string)],[Variable you want to store it to (variable)] Also, this will only work on OS 2.0 and above, as stated earlier
1389
« on: July 06, 2010, 10:48:21 pm »
I really see no reason to upgrade to 2.1, either. I'm happily using 1.1, which has all the math features I'll ever need. The power bug is rather annoying, though.
We can probably write our own 3D grapher in C. I've been thinking about writing one myself, but it seems rather futile at this point since we don't have any way to input the function being graphed.
bwang, you could use a method like in the screen shot below, allowing users to add numbers/variables to the equation by navigating through the numbers with the arrow keys, adding the corresponding number when enter is pressed.
1390
« on: July 06, 2010, 10:06:40 pm »
I think I found the old version of YAGARTO on the source forge page with the arm-elf instead of the arm-none-eabi. Should I try downloading this in a separate folder and see if that fixes my compiling errors, or is it something more complicated that is causing this?
1391
« on: July 06, 2010, 06:24:07 pm »
Even if we can't upgrade our OS any more because of these reasons (prevent downgrade, new computer link needed) I really don't think I will never need to upgrade from 2.0. The only thing that TI really can add at this point is 3d graphs (which would probably only be for the CAS) and more programming features (the only thing I could think of is dialog boxes, they would never add any features needed to make a graphical game). Unless they add something really big, I really can't see my self upgrading.
1392
« on: July 06, 2010, 03:52:49 pm »
398. When asked to write a paper on a current event in the news, you write about the RSA key hackings
399. You have a flash drive completly filled with calculator programs
400. It is a 32 GB flash drive
401. You teacher dosen't even bother clearing your calculator memory because they know it will be restored within five minutes
402. You can read, speak, write, and understand words written in hexadecimal
403. You can do 402 for any base
404. You can do 403 for any language
1393
« on: July 06, 2010, 03:46:29 pm »
When I was first learning TI-BASIC, I originally thought For loops meant that the code inside the loop would only be executed if a certain consition was true, for example if x was less that zero, the code inside the loop would be executed. Thankfully, I never actually tried to write a program using this concept.
1394
« on: July 06, 2010, 02:21:19 pm »
Interestingly, the 89/92/200 also uses brackets to index lists/matrices.
I think Nspire basic is a lot closer to 68k basic that it is to Z80. Another similarity is that you can end a for loop on a Z80 calc with "End" but on the Nspire and 68k, you have to use "EndFor". The only major differences are the lack of dialog boxes and any commands that can be used to make a decent basic game on the Nspire.
1395
« on: July 06, 2010, 12:39:25 pm »
I sent and e-mail to TI asking if we would be able to downgrade our OS after upgrading. I don't think the person who answered knew exactly what I was talking about since the referred to OS Version 2.0.1.60, but the response dosen't make me feel too good: Thank you for contacting Texas Instruments.
This is a very good question you have about the TI-Nspire family handheld. The
latest version of the TI-Nspire family handheld operating system is OS 2.0.1.60.
And yes, if you upgrade to this version of the OS, you will not be able to
downgrade to a previous version.
Another resource you can use to find answers to your questions, example
calculations and other information is our Knowledge Base. The Knowledge Base is
accessible to you 24 hours a day, 7 days a week.
http://support.education.ti.com
I hope that you find this information helpful. If you have further questions or
comments, please feel free to send me an email.
Warmest Regards,
Doug Fincher
I was under the impression that we could downgrade with OS 2.0.1.60, but I never actually upgraded to it, so I could be wrong. I really hope TI dosen't block downgrading as this could block all new Nspire users from using Ndless until (if) Ndless 2 is released. 
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