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| − | <pre>
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| − | #include <avr/io.h>
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| − | int main(void) {
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| − |
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| − | DDRA = 0xFF;
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| − | PORTA = 0x00;
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| − |
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| − | // Set OE @ PORTA3
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| − | PORTA |= (1 << 3);
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| − |
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| − | uint16_t i;
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| − |
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| − | uint16_t a;
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| − | uint16_t b;
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| − |
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| − |
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| − | for (i = 0 ; i < 16 ; i ++) {
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| − |
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| − | // Clock @ PORTA2 every 2×
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| − | // on->off->on->off->…
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| − | if ( i % 2 ) {
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| − | PORTA |= (1 << 2 );
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| − | } else {
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| − | PORTA &= ~ (1 << 2 );
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| − | }
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| − |
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| − | PORTA &= ~ (1<<2);
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| − |
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| − | }
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| − |
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| − | // Set Strobe @ PORTA0
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| − | PORTA |= (1 << 0 ) ;
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| − | // Delay
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| − | for (b = 0; b < 0xffff; b++) {
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| − | PORTB &= (1 << 1);
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| − | }
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| − | // Unset Strobe @ PORTA0
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| − | PORTA &= ~ (1 << 0 ) ;
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| − |
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| − | // Delay
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| − | for (a = 0; a < 5; a++) {
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| − | for (b = 0; b < 0xffff; b++) {
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| − | /* nix */
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| − | }
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| − | }
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| − |
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| − | for ( i = 0; i < 16 ; i ++) {
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| − |
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| − | /* // Set Data
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| − | if ( ((int) (i/2)) >= 2 && ((int) (i/2)) <= 5) {
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| − | PORTA &= ~ (1 << 1);
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| − | } else {
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| − | PORTA |= (1 << 1);
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| − | }
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| − | */
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| − |
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| − | // set Data @ PORTA1 every 4×
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| − | if ( ((int) i/2) % 2 ) {
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| − | PORTA |= (1 << 1);
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| − | }else {
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| − | PORTA &= ~ (1 << 1);
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| − | }
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| − |
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| − |
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| − | // set Clock @ PORTA2 every 2×
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| − | if ( i % 2 ) {
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| − | PORTA |= (1 << 2 );
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| − | } else {
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| − | PORTA &= ~ (1 << 2 );
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| − | }
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| − |
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| − | // Set and unset Strobe @ PORTA0
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| − | PORTA |= (1 << 0 ) ;
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| − | PORTA &= ~ (1 << 0 ) ;
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| − |
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| − |
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| − | // Set OE @ PORTA3
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| − | PORTA |= (1 << 3);
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| − |
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| − | // Delay
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| − | for (a = 0; a < 5; a++) {
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| − | for (b = 0; b < 0xffff; b++) {
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| − | /* nix */
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| − | }
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| − | }
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| − | }
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| − |
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| − | return 0;
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| − |
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| − | }
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| − | </pre>
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| − |
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| − | [[Category:U23 2007]]
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