WIP / Refactored Switch Software

Software/Switch/Swtich/MeyCan.cpp

@@ -0,0 +1,185 @@
+#include "MeyCan.h";
+#include <SPI.h>;
+#include <mcp2515.h>;
+
+
+PinState MeyPins[8];
+MCP2515* canInterfaces[4];
+uint16_t myDeviceId;
+
+
+void SetupMeyCan()
+{
+  for (int i = 0; i < sizeof(MeyPins) / sizeof(PinState); i++)
+  {
+    pinMode(MeyPins[i].pin_id, OUTPUT);
+    digitalWrite(MeyPins[i].pin_id, LOW);
+    MeyPins[i].pin_state = false;
+  }
+  CalculateMyDeviceId();
+
+  for (int i = 0; i < sizeof(canInterfaces) / sizeof(MCP2515*); i++) {
+
+    canInterfaces[i]->reset();
+    canInterfaces[i]->setBitrate(CAN_500KBPS, MCP_8MHZ); //Sets CAN at speed 500KBPS and Clock 8MHz
+    canInterfaces[i]->setNormalMode();
+
+
+    SendVersionPackage(canInterfaces[i]);
+  }
+}
+
+void SetCanInterface(byte index, byte pinId)
+{
+  canInterfaces[index] =  new  MCP2515(pinId);
+}
+
+void SetMeyPin(byte index, byte meyPinId, byte pinId)
+{
+  MeyPins[index] = PinState();
+  MeyPins[index].Init(pinId, (byte) meyPinId);
+
+  canInterfaces[index] =  new  MCP2515(pinId);
+}
+
+void HandleFrame(can_frame *frame)
+{
+  HandleTriggerMeypinCanPackage(frame);
+}
+
+void HandleTriggerMeypinCanPackage(can_frame *frame)
+{
+  if (GetPackageType(frame->can_id) == TRIGGER_SWITCH_CAN_ID)
+  {
+    uint16_t adressedDeviceId = ((uint16_t )frame->data[0] << 8) | frame->data[1] ;
+    if (adressedDeviceId != myDeviceId) return;
+
+
+    int meyPinId = frame->data[2];
+    bool state = frame->data[3] > 0;
+
+    PinState *adressedPin = NULL;
+    for (int i = 0; i < sizeof(MeyPins) / sizeof(PinState); i++)
+      if (MeyPins[i].meyPinId == meyPinId)
+      {
+        adressedPin = &MeyPins[i];
+        break;
+      }
+
+    if (adressedPin != NULL)
+    {
+      if (adressedPin->is_input == true)
+      {
+        pinMode(adressedPin->pin_id, OUTPUT);
+        adressedPin->is_input = false;
+      }
+
+      bool pinChanged = adressedPin->pin_state != state;
+      adressedPin->pin_state = state;
+
+      if (pinChanged) {
+        digitalWrite(adressedPin->pin_id, state);
+        SendSwitchedTriggeredCanPackage(adressedPin->meyPinId, state);
+      }
+
+    }
+  }
+}
+
+byte CircularShift(byte b)
+{
+  return (b << 1) | (b >> 7 & 1);
+}
+
+uint16_t GetDeviceId(uint32_t canFrameId)
+{
+  return canFrameId & 0xFFFF;
+}
+
+uint16_t GetPackageType(uint32_t canFrameId)
+{
+  return (canFrameId / 0x10000) & 0xFFF;
+}
+
+byte GetDeviceIdLow() {
+  return (SIGROW.SERNUM0 ^
+          CircularShift(SIGROW.SERNUM2) << 1 ^
+          CircularShift( CircularShift(SIGROW.SERNUM4)) ^
+          CircularShift( CircularShift( CircularShift(SIGROW.SERNUM6))) ^
+          CircularShift( CircularShift( CircularShift( CircularShift(SIGROW.SERNUM8)))));
+}
+
+byte GetDeviceIdHigh() {
+  return (SIGROW.SERNUM1 ^
+          CircularShift(SIGROW.SERNUM3) << 1 ^
+          CircularShift( CircularShift(SIGROW.SERNUM5)) ^
+          CircularShift( CircularShift( CircularShift(SIGROW.SERNUM7))) ^
+          CircularShift( CircularShift( CircularShift( CircularShift(SIGROW.SERNUM9)))));
+}
+
+uint32_t CreateCanId(uint16_t commandId)
+{
+  return ((((uint32_t)commandId) & 0xFFF) * 0x10000) | myDeviceId | CAN_EFF_FLAG;
+}
+
+void SendVersionPackage(MCP2515 *interface)
+{
+  can_frame toSend;
+  toSend.can_id = CreateCanId(HELP_PACKAGE_CAN_ID);
+  toSend.can_dlc = 6;
+
+  toSend.data[0] = SOFTWARE_VERSION_HIGH;
+  toSend.data[1] = SOFTWARE_VERSION_LOW;
+  toSend.data[2] = HARDWARE_VERSION_HIGH;
+  toSend.data[3] = HARDWARE_VERSION_LOW;
+  toSend.data[4] = (myDeviceId >> 8) & 0xFF;
+  toSend.data[5] = myDeviceId & 0xFF;
+
+  DoSendCanPkg(interface,  &toSend);
+}
+
+void SendDoTriggerSwitchCanPackage(uint16_t targetCanId, byte pinId, byte state)
+{
+  can_frame toSend;
+
+  toSend.can_id = CreateCanId(TRIGGER_SWITCH_CAN_ID);
+  toSend.can_dlc = 4;
+  toSend.data[0] = (targetCanId & 0xFF00) >> 8;
+  toSend.data[1] = targetCanId & 0xFF;
+  toSend.data[2] = pinId;
+  toSend.data[3] = state;
+
+  DoSendCanPkg(&toSend);
+  HandleFrame(&toSend);
+}
+
+void SendSwitchedTriggeredCanPackage(byte pinId, int state)
+{
+  can_frame toSend;
+  toSend.can_id = CreateCanId(SWITCH_TRIGGERED_CAN_ID);
+  toSend.can_dlc = 2;
+  toSend.data[0] = pinId;
+  toSend.data[1] = state;
+
+  DoSendCanPkg(&toSend);
+}
+
+void DoSendCanPkg(can_frame *frame)
+{
+  for (int i = 0; i < sizeof(canInterfaces) / sizeof(MCP2515*); i++)
+    DoSendCanPkg(canInterfaces[i], frame);
+}
+
+void DoSendCanPkg(MCP2515* interface, can_frame *frame)
+{
+  byte cnt = 0;
+  while (interface->sendMessage(frame))
+  {
+    if (++cnt > 10) return;
+  }
+}
+
+void CalculateMyDeviceId()
+{
+  myDeviceId = (GetDeviceIdHigh() << 8) | GetDeviceIdLow();
+}