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soulraven
Joined: 08 Feb 2009
Posts: 72
Location: campulung muscel
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| transform constant char |
 Posted: Fri Jul 10, 2009 12:29 am |
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hi, I need help:(
I want to make an animation with ascii.
Something like this /-|-\
You know the animation, the rotation, but I want to make a function more generally.
animation(LCD_x, LCD_Y, "/-|-\")
How to animate the strings?
I use the CCS compiler and for now I make this code
| Code: | void animatie(unsigned char coloana, unsigned char rand, char *animatie[11])
{
int frame;
char top[11];
strcpy(top,animatie.c_str());
//strncpy(top,animatie,2);
for (frame=0;frame<=strlen(animatie);frame++);
{
lcd_gotoxy(coloana,rand);
printf(lcd_putc,"%i",frame);
// lcd_putc(top);
lcd_outtext(animatie[frame]);
} |
But is not working, how to put the strings on the pointer or matrix, and read step by step the pointer or the matrix? |
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Wayne_
Joined: 10 Oct 2007
Posts: 681
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| Posted: Fri Jul 10, 2009 2:19 am |
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There are 2 main problems with this.
1. The use of animation like this is usually to show that somethng is happening. With your code, nothing else can run while it loops through the animation. Unless you are planning on calling this within a main loop somewhere!
2. Without a delay it would cycle through the chars too quickly for you to notice the change, and it only cycles once, again you may be planning on calling this multiple times.
Options,
1. use an interrupt routine. This is probably the way I would do it using a timer interrupt. It would give a smooth animation and you don't have to worry about timing. Just start and stop.
2. Have static or global index and when this routine is called display the char at index and then increment index with a check for the end. The problem with this is that your main loop will need to keep calling this function with a suitable delay between calls. There are lots of ways to do this without using delay!
2. e.g.
First an easy way if you are using the same chars all the time
| Code: |
void animatie(int x, int y)
{
static int index = 0;
lcd_gotoxy(x, y);
if ((index == 0) || (index == 4))
lcd_putc('|');
else if ((index == 1) || (index == 5))
lcd_putc('/');
else if ((index == 2) || (index == 6))
lcd_putc('-');
else
lcd_putc('\');
if (++index > 7)
index = 0;
}
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or
| Code: |
void animate(int x, int y, char *buf)
{
static index = 0;
lcd_gotoxy(x, y);
lcd_putc(buf[index]);
if (++index > 7)
index = 0;
}
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