30 lines
559 B
C
30 lines
559 B
C
#include <LPC17xx.h>
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int main(){
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unsigned long x, y, i, j;
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LPC_PINCON->PINSEL0 = 0;
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LPC_GPIO0->FIODIR = 0xFF<<15;
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LPC_GPIO2->FIODIR = 0x0<<12;
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while(1){
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x = LPC_GPIO2->FIOPIN & (1 << 12);
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y = x ? (1<<22) : (1<<15);
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int dir = x ? 1 : 0;
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for(int k=0; k<2; k++){
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for(i=0; i<8; i++){
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LPC_GPIO0->FIOSET = y;
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y = dir ? y>>1 : y<<1;
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for(j=0; j<800000; j++);
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}
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y = x ? (1<<22) : (1<<15);
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LPC_GPIO0->FIOCLR = y;
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}
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for(i=0; i<8; i++){
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LPC_GPIO0->FIOCLR = y;
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y = dir ? y>>1 : y<<1;
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for(j=0; j<800000; j++);
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}
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}
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}
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