DIO pin optional

ElectronicCats · Apr 25, 2024 · 6232628 · 6232628
1 parent c1ff503
commit 6232628
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Showing 3 changed files with 78 additions and 19 deletions.
diff --git a/src/arduino-rfm/RFM95.cpp b/src/arduino-rfm/RFM95.cpp
@@ -603,6 +603,10 @@ void RFM_Set_Tx_Power(int level, int outputPin)
   }
 }
 
+bool RFM_isRxDone()
+{
+    return (RFM_Read(RFM_REG_IRQ_FLAGS & 0x7f) & IRQ_RX_DONE_MASK) != 0;
+}
 
 void RFM_Set_OCP(uint8_t mA)
 {
@@ -642,7 +646,8 @@ void RFM_Send_Package(sBuffer *RFM_Tx_Package, sSettings *LoRa_Settings)
   RFM_Change_Channel(LoRa_Settings->Channel_Tx);
 
   //Switch DIO0 to TxDone
-  RFM_Write(RFM_REG_DIO_MAPPING1, 0x40);
+  if (RFM_pins.DIO0 != -1)
+    RFM_Write(RFM_REG_DIO_MAPPING1, 0x40);
 
   //Set IQ to normal values
   RFM_Write(RFM_REG_INVERT_IQ,0x27);
@@ -667,7 +672,12 @@ void RFM_Send_Package(sBuffer *RFM_Tx_Package, sSettings *LoRa_Settings)
   RFM_Write(RFM_REG_OP_MODE,0x83);
 
   //Wait for TxDone
-  while(digitalRead(RFM_pins.DIO0) == LOW);
+  if (RFM_pins.DIO0 != -1)
+    while(digitalRead(RFM_pins.DIO0) == LOW);
+  else
+  {
+    while ((RFM_Read(RFM_REG_IRQ_FLAGS & 0x7f) & IRQ_TX_DONE_MASK) == 0);
+  }
 
   //Clear interrupt
   RFM_Write(RFM_REG_IRQ_FLAGS,0x08);
@@ -688,7 +698,8 @@ message_t RFM_Single_Receive(sSettings *LoRa_Settings)
   message_t Message_Status = NO_MESSAGE;
 
   //Change DIO 0 back to RxDone
-  RFM_Write(RFM_REG_DIO_MAPPING1, 0x00);
+  if (RFM_pins.DIO0 != -1)
+    RFM_Write(RFM_REG_DIO_MAPPING1, 0x00);
 
   //Invert IQ Back
   RFM_Write(RFM_REG_INVERT_IQ, 0x67);
@@ -705,26 +716,53 @@ message_t RFM_Single_Receive(sSettings *LoRa_Settings)
 
   //Wait until RxDone or Timeout
   //Wait until timeout or RxDone interrupt
-  while((digitalRead(RFM_pins.DIO0) == LOW) && (digitalRead(RFM_pins.DIO1) == LOW));
+  byte RegIrqFlags;
+  if (RFM_pins.DIO0 != -1)
+    while((digitalRead(RFM_pins.DIO0) == LOW) && (digitalRead(RFM_pins.DIO1) == LOW));
+  else
+  {
+    RegIrqFlags = RFM_Read(RFM_REG_IRQ_FLAGS & 0x7f);
+    while ((RegIrqFlags & (IRQ_RX_DONE_MASK | IRQ_RX_TIMEOUT_MASK)) == 0)
+    {
+      RegIrqFlags = RFM_Read(RFM_REG_IRQ_FLAGS & 0x7f);
+    }
+  }
 
   //Check for Timeout
-  if(digitalRead(RFM_pins.DIO1) == HIGH)
+  bool isTimeout;
+  if (RFM_pins.DIO0 != -1)
+  {
+    isTimeout = digitalRead(RFM_pins.DIO1) == HIGH;
+  }
+  else
+  {
+    isTimeout = (RegIrqFlags & IRQ_RX_TIMEOUT_MASK) != 0;
+  }
+  if (isTimeout)
   {
     //Clear interrupt register
     RFM_Write(RFM_REG_IRQ_FLAGS,0xE0);
     Message_Status = TIMEOUT;
   }
 
   //Check for RxDone
-  if(digitalRead(RFM_pins.DIO0) == HIGH)
+  bool isRxDone;
+  if (RFM_pins.DIO0 != -1)
+  {
+    isRxDone = digitalRead(RFM_pins.DIO0) == HIGH;
+  }
+  else
+  {
+    isRxDone = (RegIrqFlags & IRQ_RX_DONE_MASK) != 0;
+  }
+  if(isRxDone)
   {
 	  Message_Status = NEW_MESSAGE;
   }
 
   return Message_Status;
 }
 
-
 /*
 *****************************************************************************************
 * Description : Function to switch RFM to continuous receive mode, used for Class C motes
@@ -735,7 +773,8 @@ message_t RFM_Single_Receive(sSettings *LoRa_Settings)
 void RFM_Continuous_Receive(sSettings *LoRa_Settings)
 {
   //Change DIO 0 back to RxDone and DIO 1 to rx timeout
-  RFM_Write(RFM_REG_DIO_MAPPING1,0x00);
+  if (RFM_pins.DIO0 != -1)
+    RFM_Write(RFM_REG_DIO_MAPPING1,0x00);
 
   //Invert IQ Back
   RFM_Write(RFM_REG_INVERT_IQ, 0x67);

diff --git a/src/arduino-rfm/RFM95.h b/src/arduino-rfm/RFM95.h
@@ -94,6 +94,11 @@ typedef enum {
     RFM_MODE_LORA       = 0b10000000
     } frm_mode_t;
 
+typedef enum {
+    IRQ_RX_TIMEOUT_MASK     = 0b10000000,
+    IRQ_RX_DONE_MASK        = 0b01000000,
+    IRQ_TX_DONE_MASK        = 0b00001000
+    } irq_mask;
 
 /*
 *****************************************************************************************
@@ -109,6 +114,7 @@ message_t RFM_Get_Package(sBuffer *RFM_Rx_Package);
 void RFM_Write(unsigned char RFM_Address, unsigned char RFM_Data);
 void RFM_Switch_Mode(unsigned char Mode);
 void RFM_Set_Tx_Power(int level, int outputPin);
+bool RFM_isRxDone();
 void RFM_Set_OCP(unsigned char mA);
 
 unsigned char RFM_Get_Rssi();

diff --git a/src/arduino-rfm/lorawan-arduino-rfm.cpp b/src/arduino-rfm/lorawan-arduino-rfm.cpp
@@ -122,23 +122,28 @@ bool LoRaWANClass::init(void)
     Message_Rx.Direction = 0x01; //Set down direction for Rx message
 
     //Initialize I/O pins
-    pinMode(RFM_pins.DIO0, INPUT);
-    pinMode(RFM_pins.DIO1, INPUT);
+    if (RFM_pins.DIO0 != -1)
+    {
+        pinMode(RFM_pins.DIO0, INPUT);
+        pinMode(RFM_pins.DIO1, INPUT);
+        pinMode(RFM_pins.DIO2, INPUT);
+    }
 #ifdef BOARD_DRAGINO_SHIELD
     pinMode(RFM_pins.DIO5, INPUT);
 #endif
-    pinMode(RFM_pins.DIO2, INPUT);
     pinMode(RFM_pins.CS, OUTPUT);
-    pinMode(RFM_pins.RST, OUTPUT);
-
     digitalWrite(RFM_pins.CS, HIGH);
 
     // Reset
-    digitalWrite(RFM_pins.RST, HIGH);
-    delay(10);
-    digitalWrite(RFM_pins.RST, LOW);
-    delay(10);
-    digitalWrite(RFM_pins.RST, HIGH);
+    if (RFM_pins.RST != -1)
+    {
+        pinMode(RFM_pins.RST, OUTPUT);
+        digitalWrite(RFM_pins.RST, HIGH);
+        delay(10);
+        digitalWrite(RFM_pins.RST, LOW);
+        delay(10);
+        digitalWrite(RFM_pins.RST, HIGH);
+    }
 
     //Initialise the SPI port
     SPI.begin();
@@ -495,7 +500,16 @@ void LoRaWANClass::update(void)
         }
 
         //Receive in Class C mode
-        if (digitalRead(RFM_pins.DIO0) == HIGH )
+        bool isRxDone;
+        if (RFM_pins.DIO0 != -1)
+        {
+            isRxDone = digitalRead(RFM_pins.DIO0) == HIGH;
+        }
+        else
+        {
+            isRxDone = RFM_isRxDone();
+        }
+        if (isRxDone)
         {
             LORA_Receive_Data(&Buffer_Rx, &Session_Data, &OTAA_Data, &Message_Rx, &LoRa_Settings);
             if (Buffer_Rx.Counter != 0x00)