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32 lines
669 B
32 lines
669 B
#include "dipSwitch.h"
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/*
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* 회로도 기준:
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* ADD_1..ADD_5 = P8.1..P8.5
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* Pull-up to VCC5, DIP ON -> GND(LOW) => Active-Low
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*/
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#define DIP_PORT P8
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#define DIP_PM PM8
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#define DIP_MASK (0x3Eu) // b0011_1110 = P8.1~P8.5
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#define DIP_SHIFT (1u) // P8.1이 bit0로 오도록
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void DipSwitch_Init(void)
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{
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// 입력 설정: PM bit=1 => input
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DIP_PM |= DIP_MASK;
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}
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uint8_t DipSwitch_ReadAddr_0to31(void)
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{
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uint8_t raw = (uint8_t)(DIP_PORT & DIP_MASK);
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// Active-Low이므로 반전 후, 마스크 적용
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uint8_t v = (uint8_t)((~raw) & DIP_MASK);
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// P8.1~P8.5 -> bit0~bit4
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v = (uint8_t)(v >> DIP_SHIFT);
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return (uint8_t)(v & 0x1Fu); // 0~31
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}
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