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src/CANode.cpp

@@ -12,13 +12,61 @@
 
 #include <Metro.h>
 #include <FlexCAN.h>
-
+#include <OneWire.h>
+// Configurations
+// Misc
+#define DEBUG 0
+#define LED 13
+// Metro
+#define METRO_CAN_tick 1 // 20 millisecond
+#define METRO_OW_read_tick 20 // 20 millisecond
+#define METRO_OW_search_tick 1000 // 1000 millisecond
+// CAN bus
+#define CAN_speed 125000
 #define CAN_RS_PIN 2
+// OneWire
+#define OW_pin 14
+
+#define TEST_ADDR "125B275000000026"
+
+#define DS2406_FAMILY       0x12
+#define DS2406_WRITE_STATUS 0x55
+#define DS2406_READ_STATUS  0xaa
+#define DS2406_CHANNEL_ACCESS  0xf5
+#define DS2406_CHANNEL_CONTROL1 0x4c // 01001100 - Read Both Pins
+#define DS2406_CHANNEL_CONTROL2 0xff // for future dev
+#define SKIP_ROM 0xCC
+#define PIO_A 0x20
+#define PIO_B 0x40
+
+#define DS2406_BUF_LEN 10
+
+// Initialisation
+// Misc
+#if DEBUG
+  #define DEBUG_PRINT(a) Serial.print(a)
+  #define DEBUG_WRITE(a) Serial.write(a)
+#else
+  #define DEBUG_PRINT(a)
+  #define DEBUG_WRITE(a)
+#endif /* DEBUG */
+
+int led = LED;
+// Metro
+Metro METRO_CAN = Metro(METRO_CAN_tick);
+Metro METRO_OW_read = Metro(METRO_OW_read_tick);
+Metro METRO_OW_search = Metro(METRO_OW_search_tick);
+// CAN bus
+FlexCAN CANbus(CAN_speed);
+// OneWire
+uint8_t addr[8];
+uint8_t buffer[DS2406_BUF_LEN];
+uint8_t tmp;
+OneWire OW_1(OW_pin);
+
+
 
-Metro sysTimer = Metro(1);// milliseconds
 
-int led = 13;
-FlexCAN CANbus(125000);
 static CAN_message_t msg,rxmsg;
 static uint8_t hex[17] = "0123456789abcdef";
 
@@ -26,33 +74,68 @@ int txCount,rxCount;
 unsigned int txTimer,rxTimer;
 
 
-// -------------------------------------------------------------
-static void hexDump(uint8_t dumpLen, uint8_t *bytePtr)
-{
-  uint8_t working;
-  while( dumpLen-- ) {
-    working = *bytePtr++;
-    Serial.write( hex[ working>>4 ] );
-    Serial.write( hex[ working&15 ] );
+// Functions -------------------------------------------------------
+void PrintBytes(uint8_t* addr, uint8_t count, bool newline=0) {
+  for (uint8_t i = 0; i < count; i++) {
+    Serial.print(addr[i]>>4, HEX);
+    Serial.print(addr[i]&0x0f, HEX);
   }
-  Serial.write('\r');
-  Serial.write('\n');
+  if (newline)
+    Serial.println();
+}
+void DEBUG_Bytes(uint8_t* addr, uint8_t count, bool newline=0) {
+  #if DEBUG
+    for (uint8_t i = 0; i < count; i++) {
+      Serial.print(addr[i]>>4, HEX);
+      Serial.print(addr[i]&0x0f, HEX);
+    }
+    if (newline)
+      Serial.println();
+  #endif
+}
+void print_OW_Device(uint8_t *addr) {
+    for(int i = 0; i < 8; i++) {
+        if(i != 0) {
+            Serial.print(":");
+        }
+        Serial.print(addr[i], HEX);
+    }
+}
+uint8_t read_DS2406(uint8_t* addr) {
+    // We're using a temporary switch object here only because we're
+    // discovering them dynamically.  Depending on your app, you may
+    // already know the serial number of the device you intend to
+    // control and will use it there.
+	  OW_1.reset();
+    OW_1.select(addr);
+    OW_1.write(DS2406_CHANNEL_ACCESS,1);
+    OW_1.write(DS2406_CHANNEL_CONTROL1,1);
+    OW_1.write(DS2406_CHANNEL_CONTROL2,1);
+    tmp = OW_1.read();
+    OW_1.reset();
+    #if DEBUG
+	   PrintBytes(&tmp,1,1);
+    #endif /* DEBUG */
+    return tmp;
 }
-
-
 // -------------------------------------------------------------
 void setup(void)
 {
-  pinMode(CAN_RS_PIN,OUTPUT);
-  digitalWrite(CAN_RS_PIN,0);
-  CANbus.begin();
+  // Misc
+  Serial.begin(115200);
   pinMode(led, OUTPUT);
   digitalWrite(led, 1);
 
-  delay(1000);
-  Serial.println(F("Hello Teensy 3.1 CAN Test."));
+  //CAN bus
+  pinMode(CAN_RS_PIN,OUTPUT);
+  digitalWrite(CAN_RS_PIN,0);
+  CANbus.begin();
 
-  sysTimer.reset();
+  delay(100);
+  Serial.println(F("Hello Teensy 3.2 CANode awakes."));
+  METRO_CAN.reset();
+  METRO_OW_read.reset();
+  METRO_OW_search.reset();
 }
 
 
@@ -60,7 +143,42 @@ void setup(void)
 void loop(void)
 {
   // service software timers based on Metro tick
-  if ( sysTimer.check() ) {
+  if ( METRO_OW_search.check() ) {
+    //Serial.print("Beginning Search...\n");
+    OW_1.reset_search();
+    // Assume we can't find something until we prove otherwise.
+//    bool foundDevice = false;
+
+    while(OW_1.search(addr) == 1) {
+        if ( OneWire::crc8( addr, 7) != addr[7]) {
+            Serial.print("CRC is not valid!\n");
+            delay(100);
+            return;
+        }
+
+        Serial.print("Found a device: ");
+        print_OW_Device(addr);
+        Serial.println("");
+
+
+        // At this point, we know we have a DS2406.  Blink it.
+        if(addr[0] == DS2406_FAMILY) {
+//            foundDevice = true;
+            // digitalWrite(13, HIGH);
+            tmp = read_DS2406(addr);
+            bool pioA = tmp & 0x04;
+            bool pioB = tmp & 0x08;
+            digitalWrite(led, pioA);
+          }
+        }
+  }
+  if (METRO_OW_read.check() ) {
+
+  }
+
+
+
+  if ( METRO_CAN.check() ) {
     if ( txTimer ) {
       --txTimer;
     }
@@ -73,7 +191,7 @@ void loop(void)
   if ( !rxTimer ) {
     while ( CANbus.read(rxmsg) ) {
       //hexDump( sizeof(rxmsg), (uint8_t *)&rxmsg );
-      Serial.write(rxmsg.buf[0]);
+      DEBUG_WRITE(rxmsg.buf[0]);
       rxCount++;
     }
   }
@@ -82,10 +200,12 @@ void loop(void)
   if ( !txTimer ) {
     // if frames were received, print the count
     if ( rxCount ) {
-      Serial.write('=');
-      Serial.print(rxCount);
-      Serial.print(",Hello=");
-      Serial.print(rxmsg.id,HEX);
+      #if DEBUG
+        Serial.write('=');
+        Serial.print(rxCount);
+        Serial.print(",Hello=");
+        Serial.print(rxmsg.id,HEX);
+      #endif
       rxCount = 0;
     }
     txTimer = 100;//milliseconds
@@ -96,16 +216,15 @@ void loop(void)
     }
     // send 6 at a time to force tx buffering
     txCount = 16;
-    digitalWrite(led, 1);
-    Serial.println(".");
+    //digitalWrite(led, 1);
+//    Serial.println(".");
     while ( txCount-- ) {
       CANbus.write(msg);
       msg.buf[0]++;
     }
-    digitalWrite(led, 0);
+    // digitalWrite(led, 0);
     // time delay to force some rx data queue use
     rxTimer = 3;//milliseconds
   }
 
 }
-