pslockout/firmware/utils.cpp

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3.6 KiB
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2019-02-18 05:45:02 +00:00
#include "utils.h"
bool greenButton() { return digitalRead(GREEN_BUTTON_PIN) == BUTTON_CLOSED; }
bool redButton() { return digitalRead(RED_BUTTON_PIN) == BUTTON_CLOSED; }
void relayOn() { digitalWrite(RELAY_PIN, RELAY_CLOSED); }
void relayOff() { digitalWrite(RELAY_PIN, RELAY_OPEN); }
void greenLEDOn() { digitalWrite(GREEN_LED_PIN, LED_PIN_ON); }
void greenLEDOff() { digitalWrite(GREEN_LED_PIN, LED_PIN_OFF); }
void redLEDOn() { digitalWrite(RED_LED_PIN, LED_PIN_ON); }
void redLEDOff() { digitalWrite(RED_LED_PIN, LED_PIN_OFF); }
int8_t charToNum(char input)
{
return String("0123456789ABCDEF").indexOf(input);
}
bool checksum(struct cardData *cardData)
{
// checksum is each hex data byte xord'd together.
// each char is a hex nibble, so we have to work in pairs.
int8_t even = 0, odd = 0;
for (int8_t i = 0; i < CARD_DATA_LENGTH; i++) {
int8_t num = charToNum(cardData->data[i]);
if (num == -1) return false;
if (i % 2 == 0) even ^= num;
if (i % 2 == 1) odd ^= num;
}
int8_t checksum_even = charToNum(cardData->checksum[0]);
int8_t checksum_odd = charToNum(cardData->checksum[1]);
if (even == checksum_even && odd == checksum_odd) {
return true;
} else {
return false;
}
}
void checkCard()
{
struct cardData *cardData = (struct cardData *) cardBuffer;
if (cardData->head == CARD_HEAD_BYTE &&
cardData->tail == CARD_TAIL_BYTE &&
checksum(cardData)) {
String cardStr = String();
String authorizedCards = String();
for (uint8_t i = 0; i < CARD_DATA_LENGTH; i++) {
cardStr += cardData->data[i];
}
for (uint16_t i = 0; i < EEPROM_SIZE; i++) {
char tmp = EEPROM.read(i);
authorizedCards += tmp;
if (tmp == EEPROM_END_MARKER) break;
}
if (SERIAL_LOGGING) Serial.println("[INFO] Good scan from card: " + cardStr);
logEvent(LOG_CARD_GOOD_READ, cardStr.c_str(), cardStr.length());
if (authorizedCards.indexOf(cardStr) >= 0) {
if (SERIAL_LOGGING) Serial.println("[INFO] Card is authorized on machine.");
if (lockState == LOCK_OFF) {
lockState = LOCK_PREARM;
}
logEvent(LOG_CARD_ACCEPTED, cardStr.c_str(), cardStr.length());
} else {
if (SERIAL_LOGGING) Serial.println("[INFO] Card not authorized on machine.");
LEDState = LED_ERROR;
logEvent(LOG_CARD_DENIED, cardStr.c_str(), cardStr.length());
}
}
}
// JSON functions to prevent memory leaking see:
// https://arduinojson.org/v5/faq/i-found-a-memory-leak-in-the-library/
String serializeLockJson(uint8_t lockState)
{
// Generated with: https://arduinojson.org/assistant/
const size_t bufferSize = JSON_OBJECT_SIZE(1) + 50;
StaticJsonBuffer<bufferSize> jsonBuffer;
JsonObject& root = jsonBuffer.createObject();
root["lockState"] = (uint8_t) lockState;
String postData = String();
root.printTo(postData);
return postData;
}
String deserializeLockJson(String input)
{
// Generated with: https://arduinojson.org/assistant/
const size_t bufferSize = JSON_OBJECT_SIZE(1) + 50;
StaticJsonBuffer<bufferSize> jsonBuffer;
JsonObject& root = jsonBuffer.parseObject(input);
String action = root["action"];
return action;
}
String serializeLog()
{
size_t logLengthBytes = logPosition * sizeof(struct logData);
return "{\"log\": \"" + base64::encode((uint8_t *) eventLog, logLengthBytes, false) + "\"}";
}
void deserializeInfoJson(String input, uint8_t *processed, uint32_t *unixTime, String *version)
{
// Generated with: https://arduinojson.org/assistant/
const size_t bufferSize = JSON_OBJECT_SIZE(3) + 70;
StaticJsonBuffer<bufferSize> jsonBuffer;
JsonObject& root = jsonBuffer.parseObject(input);
*processed = root["processed"];
*unixTime = root["unixTime"];
*version = root["version"].as<String>();
}