io card support

Template Project/lib/ESPMegaPRO/DigitalInputCard.cpp

@@ -0,0 +1,96 @@
+#pragma once
+#include <ESPMegaPRO.h>
+#include <DigitalInputCard.hpp>
+
+// Instantiate the card with the specified address
+DigitalInputCard::DigitalInputCard(uint8_t address_a, uint8_t address_b) {
+    this->address_a = address_a;
+    this->address_b = address_b;
+}
+// Instantiate the card with the specified position on the dip switch
+// Bit 0,1,2 are for bank A
+// Bit 3,4,5 are for bank B
+DigitalInputCard::DigitalInputCard(bool bit0, bool bit1, bool bit2, bool bit3, bool bit4, bool bit5) {
+    this->address_a = 0x20;
+    this->address_b = 0x20;
+    if (bit0) this->address_a += 1;
+    if (bit1) this->address_a += 2;
+    if (bit2) this->address_a += 4;
+    if (bit3) this->address_b += 1;
+    if (bit4) this->address_b += 2;
+    if (bit5) this->address_b += 4;
+
+}
+// Initialize the card
+void DigitalInputCard::begin() {
+    this->inputBankA = PCF8574(this->address_a);
+    this->inputBankB = PCF8574(this->address_b);
+    this->inputBankA.begin();
+    this->inputBankB.begin();
+}
+// Refresh and Read the input from the specified pin, always refresh the input buffers
+uint8_t DigitalInputCard::digitalRead(uint8_t pin) {
+    digitalRead(pin, true);
+}
+// Read the input from the specified pin, also refresh the input buffers if refresh is true
+uint8_t DigitalInputCard::digitalRead(uint8_t pin, bool refresh) {
+    // First check if the pin is in bank A or B
+    if (pin >= 0 && pin <= 7) {
+        // Refresh the input buffers if refresh is true
+        if (refresh) refreshInputBankA();
+        // Extract the bit from the buffer
+        return ((inputBufferA >> (7 - pin)) & 1);
+    } else if (pin >= 8 && pin <= 15) {
+        // Refresh the input buffers if refresh is true
+        if (refresh) refreshInputBankB();
+        // Extract the bit from the buffer
+        return ((inputBufferB >> (15 - pin)) & 1);
+    }
+}
+// Preform a loop to refresh the input buffers
+void DigitalInputCard::loop() {
+    // Store the current input buffers
+    uint8_t inputBufferA_old = inputBufferA;
+    uint8_t inputBufferB_old = inputBufferB;
+    // Refresh the input buffers
+    refreshInputBankA();
+    refreshInputBankB();
+    // Iterate over all pins and check if they changed
+    for (int i = 0; i < 16; i++) {
+        // Check which bank the pin is in
+        if (i<8) {
+            // Check if the pin changed
+            if (((inputBufferA_old >> (7 - i)) & 1) != ((inputBufferA >> (7 - i)) & 1)) {
+                // Call the callback function if it is not null and pass the pin and the new value
+                if (callback != NULL) callback(i, ((inputBufferA >> (7 - i)) & 1));
+            }
+        } else {
+            // Check if the pin changed
+            if (((inputBufferB_old >> (15 - i)) & 1) != ((inputBufferB >> (15 - i)) & 1)) {
+                // Call the callback function if it is not null and pass the pin and the new value
+                if (callback != NULL) callback(i, ((inputBufferB >> (15 - i)) & 1));
+            }
+        }
+    }
+}
+// Get the input buffer for bank A
+uint8_t DigitalInputCard::getInputBufferA() {
+    return inputBufferA;
+}
+// Get the input buffer for bank B
+uint8_t DigitalInputCard::getInputBufferB() {
+    return inputBufferB;
+}
+// Register a callback function to be called when a pin changes
+void DigitalInputCard::registerCallback(void (*callback)(int, bool)) {
+    this->callback = callback;
+}
+
+// Refresh the input buffer for bank A
+void DigitalInputCard::refreshInputBankA() {
+    inputBufferA = inputBankA.read8();
+}
+// Refresh the input buffer for bank B
+void DigitalInputCard::refreshInputBankB() {
+    inputBufferB = inputBankB.read8();
+}