Difference between revisions of "U23 2007/NoComment/schiebe.c"
< U23 2007
m (Link wird schon automagisch angezeigt) |
m (Kommentare) |
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| Line 7: | Line 7: | ||
PORTA = 0x00; | PORTA = 0x00; | ||
| − | // Set OE | + | // Set OE @ PORTA3 |
PORTA |= (1 << 3); | PORTA |= (1 << 3); | ||
| Line 18: | Line 18: | ||
for (i = 0 ; i < 16 ; i ++) { | for (i = 0 ; i < 16 ; i ++) { | ||
| − | // Clock | + | // Clock @ PORTA2 every 2× |
| + | // on->off->on->off->… | ||
if ( i % 2 ) { | if ( i % 2 ) { | ||
PORTA |= (1 << 2 ); | PORTA |= (1 << 2 ); | ||
| Line 29: | Line 30: | ||
} | } | ||
| − | // Set | + | // Set Strobe @ PORTA0 |
PORTA |= (1 << 0 ) ; | PORTA |= (1 << 0 ) ; | ||
| + | // Delay | ||
for (b = 0; b < 0xffff; b++) { | for (b = 0; b < 0xffff; b++) { | ||
PORTB &= (1 << 1); | PORTB &= (1 << 1); | ||
} | } | ||
| + | // Unset Strobe @ PORTA0 | ||
PORTA &= ~ (1 << 0 ) ; | PORTA &= ~ (1 << 0 ) ; | ||
| + | // Delay | ||
for (a = 0; a < 5; a++) { | for (a = 0; a < 5; a++) { | ||
for (b = 0; b < 0xffff; b++) { | for (b = 0; b < 0xffff; b++) { | ||
| Line 52: | Line 56: | ||
*/ | */ | ||
| + | // set Data @ PORTA1 every 4× | ||
if ( ((int) i/2) % 2 ) { | if ( ((int) i/2) % 2 ) { | ||
PORTA |= (1 << 1); | PORTA |= (1 << 1); | ||
| Line 59: | Line 64: | ||
| − | // Clock | + | // set Clock @ PORTA2 every 2× |
if ( i % 2 ) { | if ( i % 2 ) { | ||
PORTA |= (1 << 2 ); | PORTA |= (1 << 2 ); | ||
| Line 66: | Line 71: | ||
} | } | ||
| − | + | // Set and unset Strobe @ PORTA0 | |
| − | |||
| − | // Set and unset Strobe | ||
PORTA |= (1 << 0 ) ; | PORTA |= (1 << 0 ) ; | ||
PORTA &= ~ (1 << 0 ) ; | PORTA &= ~ (1 << 0 ) ; | ||
| − | // Set OE | + | // Set OE @ PORTA3 |
PORTA |= (1 << 3); | PORTA |= (1 << 3); | ||
| + | // Delay | ||
for (a = 0; a < 5; a++) { | for (a = 0; a < 5; a++) { | ||
for (b = 0; b < 0xffff; b++) { | for (b = 0; b < 0xffff; b++) { | ||
Revision as of 20:20, 28 May 2007
#include <avr/io.h>
int main(void) {
DDRA = 0xFF;
PORTA = 0x00;
// Set OE @ PORTA3
PORTA |= (1 << 3);
uint16_t i;
uint16_t a;
uint16_t b;
for (i = 0 ; i < 16 ; i ++) {
// Clock @ PORTA2 every 2×
// on->off->on->off->…
if ( i % 2 ) {
PORTA |= (1 << 2 );
} else {
PORTA &= ~ (1 << 2 );
}
PORTA &= ~ (1<<2);
}
// Set Strobe @ PORTA0
PORTA |= (1 << 0 ) ;
// Delay
for (b = 0; b < 0xffff; b++) {
PORTB &= (1 << 1);
}
// Unset Strobe @ PORTA0
PORTA &= ~ (1 << 0 ) ;
// Delay
for (a = 0; a < 5; a++) {
for (b = 0; b < 0xffff; b++) {
/* nix */
}
}
for ( i = 0; i < 16 ; i ++) {
/* // Set Data
if ( ((int) (i/2)) >= 2 && ((int) (i/2)) <= 5) {
PORTA &= ~ (1 << 1);
} else {
PORTA |= (1 << 1);
}
*/
// set Data @ PORTA1 every 4×
if ( ((int) i/2) % 2 ) {
PORTA |= (1 << 1);
}else {
PORTA &= ~ (1 << 1);
}
// set Clock @ PORTA2 every 2×
if ( i % 2 ) {
PORTA |= (1 << 2 );
} else {
PORTA &= ~ (1 << 2 );
}
// Set and unset Strobe @ PORTA0
PORTA |= (1 << 0 ) ;
PORTA &= ~ (1 << 0 ) ;
// Set OE @ PORTA3
PORTA |= (1 << 3);
// Delay
for (a = 0; a < 5; a++) {
for (b = 0; b < 0xffff; b++) {
/* nix */
}
}
}
return 0;
}
