71 lines
1.7 KiB
C++
71 lines
1.7 KiB
C++
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#pragma once
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#include <Arduino.h>
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#include "address.hpp"
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class EEPROM {
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public:
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void setup() {
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for (unsigned i = 0; i < addressPinCount; i++) {
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pinMode(addressPins[i], OUTPUT);
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}
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for (unsigned i = 0; i < 8; i++) {
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pinMode(dataPins[i], INPUT);
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}
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pinMode(OEb, OUTPUT);
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pinMode(WEb, OUTPUT);
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}
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/**
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* @brief Read the data pins.
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*/
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uint8_t readDataPins() {
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uint8_t b = 0;
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for (unsigned i = 0; i < 8; i++) {
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b |= (digitalRead(dataPins[i]) << i);
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}
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return b;
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}
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// set start address in via AddressState
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void read(uint8_t* data, unsigned dataSize, AddressState& address) {
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unsigned i = 0;
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for (unsigned i = 0; i < dataSize; i++) {
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digitalWrite(OEb, LOW);
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delay(t_OUTPUT_DELAY);
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data[i] = readDataPins();
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digitalWrite(OEb, HIGH);
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delay(t_OUTPUT_FLOAT);
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address.increment();
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}
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}
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/* private: */
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int OEb;
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int WEb;
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int addressPins[6];
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unsigned addressPinCount;
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int dataPins[8] = { 2, 3, 4, 5, 6, 7, 8, 9 };
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// in ms
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unsigned t_OUTPUT_DELAY = 1;
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unsigned t_MIN_WRITE_PULSE_WIDTH = 1;
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unsigned t_OUTPUT_FLOAT = 1;
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unsigned t_DATA_HOLD_TIME = 0;
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};
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constexpr EEPROM AT28C256 {
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.OEb = 17,
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.WEb = 16,
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.addressPins = {10, 15, 11},
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.addressPinCount = 3
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};
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constexpr EEPROM SST39SF02A {
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.OEb = 17,
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.WEb = 16,
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.addressPins = {10, 15, 16, 11, 12, 14},
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.addressPinCount = 6
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};
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