fix for issue #99

sketches/MultiSpeedI2CScanner/MultiSpeedI2CScanner.ino

@@ -1,7 +1,7 @@
 //
 //    FILE: MultiSpeedI2CScanner.ino
 //  AUTHOR: Rob Tillaart
-// VERSION: 0.1.7
+// VERSION: 0.1.9
 // PURPOSE: I2C scanner at different speeds
 //    DATE: 2013-11-05
 //     URL: http://forum.arduino.cc/index.php?topic=197360
@@ -14,7 +14,7 @@
 
 TwoWire *wi;
 
-const char version[] = "0.1.7";
+const char version[] = "0.1.9";
 
 
 // INTERFACE COUNT (TESTED TEENSY 3.5 AND ARDUINO DUE ONLY)
@@ -77,11 +77,10 @@ void setup()
 
   wi = &Wire;
 
-  setSpeed('0');
+  setSpeed('9');
   displayHelp();
 }
 
-
 void loop()
 {
   char command = getCommand();
@@ -146,6 +145,7 @@ void loop()
     case '2':
     case '4':
     case '8':
+    case '9':
       setSpeed(command);
       break;
 
@@ -182,7 +182,6 @@ void loop()
   }
 }
 
-
 void setAddress()
 {
   if (addressStart == 0)
@@ -223,6 +222,13 @@ void setSpeed(char sp)
       speed[0] = 800;
       speeds = 1;
       break;
+    case '9':  // limited to 400KHz
+      speeds = 5;
+      for (int i = 0; i < speeds; i++)
+      {
+        speed[i] = allSpeed[i];
+      }
+      break;
     case '0':  // reset
       speeds = sizeof(allSpeed) / sizeof(allSpeed[0]);
       for (int i = 0; i < speeds; i++)
@@ -261,16 +267,16 @@ void displayHelp()
   Serial.println(F("\th = toggle header - noHeader."));
   Serial.println(F("\ta = toggle address range, 0..127 - 8..120"));
   Serial.println(F("Speeds:"));
-  Serial.println(F("\t0 = 50 - 800 Khz"));
+  Serial.println(F("\t0 = 50 - 800 Khz  (warning - can block!!)"));
   Serial.println(F("\t1 = 100 KHz only"));
   Serial.println(F("\t2 = 200 KHz only"));
   Serial.println(F("\t4 = 400 KHz only"));
-  Serial.println(F("\t8 = 800 KHz only"));
+  Serial.println(F("\t8 = 800 KHz only  (warning - can block!)"));
+  Serial.println(F("\t9 = 50 - 400 Khz  <<< DEFAULT >>>"));
   Serial.println(F("\n\t? = help - this page"));
   Serial.println();
 }
 
-
 void I2Cscan()
 {
   startScan = millis();

sketches/MultiSpeedI2CScanner/readme.md

@@ -0,0 +1,31 @@
+
+MultiSpeedI2CScanner is a menu driven I2C scanner, see below.
+
+
+Arduino MultiSpeed I2C Scanner - 0.1.9
+
+I2C ports: 1
+        @ = toggle Wire - Wire1 - Wire2 [TEENSY 3.5 or Arduino Due]
+Scanmode:
+        s = single scan
+        c = continuous scan - 1 second delay
+        q = quit continuous scan
+        d = toggle latency delay between successful tests. 0 - 5 ms
+Output:
+        p = toggle printAll - printFound.
+        h = toggle header - noHeader.
+        a = toggle address range, 0..127 - 8..120
+Speeds:
+        0 = 50 - 800 Khz  (warning - can block!!)
+        1 = 100 KHz only
+        2 = 200 KHz only
+        4 = 400 KHz only
+        8 = 800 KHz only  (warning - can block!)
+        9 = 50 - 400 Khz  <<< DEFAULT >>>
+
+        ? = help - this page
+
+
+TODO: explain menu options in more detail
+
+

sketches/MultiSpeedI2CScanner/releaseNotes.txt

@@ -0,0 +1,36 @@
+
+==============================
+  2018-04-02  version 0.1.9
+==============================
++ '9' command to scan up to 400 KHz only to prevent blocking
++ changed "scan up to 400 KHz" as default at startup
+
+==============================
+  2017-08-03  version 0.1.8
+==============================
++ DUE support
+
+==============================
+  2017-07-17  version 0.1.7
+==============================
++ TEENSY support - multiple I2C ports
++ '@' command to select I2C Port
++ changed # speeds steps of 100
+
+==============================
+  2015-03-29  version 0.1.6
+==============================
++ Wire.setClock as more portable way to set I2C clock
+
+==============================
+  2014-07-06  version 0.1.5
+==============================
++ void setSpeed()   - more control about what is scanned
++ void setAddress() - address range
++ extended help
+
+==============================
+older versions not documented
+==============================
+
+// END OF FILE