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428 killagreg 1
#include "timer0.h"
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#include "button.h"
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#ifdef USE_FOLLOWME
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#define BUTTON       !(PINC & (1<<PINC6))
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#endif
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#ifdef USE_SDLOGGER
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#define BUTTON       !(PINC & (1<<PINC3))
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#endif
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#define CNT_KEY     10 // at least 3
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#define KEY_DELAY_MS  50
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uint16_t ButtonTimer = 0;
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void Button_Init(void)
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{
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        // set port pin as input pullup
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        #ifdef USE_FOLLOWME
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        PORTC |= (1 << PORTC6);
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        DDRC &= ~(1 << DDC6);
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        #endif
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        #ifdef USE_SDLOGGER
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        PORTC |= (1 << PORTC3);
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        DDRC &= ~(1 << DDC3);
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        #endif
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        ButtonTimer = SetDelay(KEY_DELAY_MS);
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}
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uint8_t GetButton(void)
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{
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        static uint8_t button = 0;
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        uint8_t ret = 0;
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        if(CheckDelay(ButtonTimer))
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        {
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                if(BUTTON)
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                {
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                        if(button++ == 0 || button == CNT_KEY) ret = 1;
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                        if(button == CNT_KEY) button = CNT_KEY - CNT_KEY / 3;
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                }
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                else button = 0;
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                ButtonTimer = SetDelay(KEY_DELAY_MS);
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        }
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        return(ret);
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}
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