initial release

README.md

@@ -1 +1,36 @@
-# tores_sketch
+Tores Sketch
+
+Arduino scetch to talk to i2c connected devices.
+
+Commands:
+
+scan
+----
+Scans for devices on i2c bus and returns their addresses.
+
+
+dump addr size
+--------------
+Reads bytes and returns them formated on screen.
+addr - Address of the device.
+size - Number of bytes to read.
+       Just block of 16 bytes.
+
+
+read addr size
+--------------
+Reads bytes and returns them as they are.
+Used to save a dump file.
+
+addr - Address of the device.
+size - Number of bytes to read.
+       Just block of 16 bytes.
+
+
+write addr memPos value
+-----------------------
+Writes a single byte on a device at the given position.
+
+addr   - Address of the device.
+memPos - Memory position to write to.
+value  - The value to wite.

tores_scetch.ino

@@ -0,0 +1,200 @@
+#include <Wire.h>
+
+int ledPin = 13;
+char buf[100];
+
+void setup() {
+
+  pinMode( ledPin, OUTPUT);
+  Serial.begin(9600);
+  Wire.begin();
+
+}
+
+String command = "";
+int executeCommand = 0;
+
+void loop() {
+
+  while(Serial.peek() != 0x00 && Serial.available() > 0){
+      command += Serial.readStringUntil(0x00);
+
+      executeCommand = 1;
+       break;
+  }
+  /*
+  while( Serial.available() > 0 ){
+      command += Serial.readString();
+      executeCommand = 1;
+  }
+/**/
+  if( executeCommand > 0 ){
+
+    if( getValue( command, ' ', 0) == "read" ){
+
+      readBytes( getValue( command, ' ', 1).toInt(), getValue( command, ' ', 2).toInt() );
+
+    }else if( getValue( command, ' ', 0) == "write" ){
+
+      Serial.println("received command:" +command+ "\n" );  
+      writeByte( getValue( command, ' ', 1).toInt(), (byte)getValue( command, ' ', 2).toInt(), (byte)getValue( command, ' ', 3).toInt() );
+
+    }else if( getValue( command, ' ', 0) == "scan" ){
+
+      Serial.println("received command:" +command+ "\n" );
+      scanForDevices();
+
+    }else if( getValue( command, ' ', 0) == "dump" ){
+
+      Serial.println("received command:" +command+ "\n" );
+      dumpDevice( getValue( command, ' ', 1).toInt(), getValue( command, ' ', 2).toInt() );
+
+    }else
+      Serial.println("unknown command:" +command+ "\n" );
+
+    executeCommand = 0;
+    command = "";
+  }
+
+}
+
+
+void readBytes( int addr, int _size ){
+
+  Wire.beginTransmission(addr);
+  Wire.write(0);
+  Wire.endTransmission();
+
+  int memPos = 0;
+  byte dump[_size] ;
+
+  while( true ){
+
+      if( memPos < _size){
+
+        Wire.requestFrom( addr, 1);
+
+        byte c = Wire.read();
+        dump[memPos++] = c;
+
+      }else
+        break;
+  }
+
+  Serial.write( dump, _size );
+  Serial.flush();
+
+}
+
+void writeByte( int addr, int memPos, byte data ){
+  Wire.beginTransmission(addr);
+  Wire.write( memPos );
+  Wire.write( data );
+  Wire.endTransmission();
+}
+
+
+void dumpDevice( int addr, int _size ){
+
+  Wire.beginTransmission(addr);
+  Wire.write(0);
+  Wire.endTransmission();
+
+  int line[16] ;
+  int linePos = 0;
+  int memPos = 0;
+
+  while( true ){
+
+    if( memPos < _size){
+
+      Wire.requestFrom( addr, 1); 
+
+      int c = Wire.read();
+      line[linePos++] = c;
+
+      if( linePos > 15 || Wire.available() ){
+
+        sprintf(buf, "%8d: ", memPos);
+        Serial.print( buf );
+
+        for( int i = 0; i < linePos; i++){
+          if(i==8)
+            Serial.print( " " );
+          sprintf(buf, "%2X ", line[i] );
+          Serial.print(buf);
+        }
+
+        for( int i = 0; i < linePos; i++){
+          if(i==8)
+            Serial.print( " " );
+          sprintf(buf, "%c", (char) line[i] );
+          Serial.print(buf);
+        }
+
+        Serial.println();
+        memPos += linePos;
+        linePos = 0;
+      }
+
+    }else
+      break;
+
+  }
+
+}
+
+void scanForDevices(){
+
+  Serial.println( "" );
+  Serial.println( "Scanning for devices ..." );
+
+  for( int i=0; i < 127; i++ ){
+
+    Wire.requestFrom( i, 1);
+
+    bool found = false;
+    while( Wire.available() ){
+     Wire.read();
+     found = true;
+    }
+
+    if(found){
+      sprintf(buf, "Device found at address:%3d", i);
+      Serial.println( buf );
+    }else{
+      //sprintf(buf, "No device found ad address:%3d: ", i);
+      //Serial.println( buf );
+    }
+
+  }
+
+  Serial.println( "Scanning finished." );
+
+}
+
+void blink(int onPhase, int offPhase ){
+  digitalWrite(ledPin, HIGH);
+  delay(onPhase);
+  digitalWrite(ledPin, LOW);
+  delay(offPhase);
+}
+
+// http://stackoverflow.com/questions/9072320/split-string-into-string-array
+String getValue(String data, char separator, int index)
+{
+  int found = 0;
+  int strIndex[] = {0, -1};
+  int maxIndex = data.length()-1;
+
+  for(int i=0; i<=maxIndex && found<=index; i++){
+    if(data.charAt(i)==separator || i==maxIndex){
+        found++;
+        strIndex[0] = strIndex[1]+1;
+        strIndex[1] = (i == maxIndex) ? i+1 : i;
+    }
+  }
+
+  return found>index ? data.substring(strIndex[0], strIndex[1]) : "";
+}
+