+ version 0.1.05

+ added option 0,1,2,4,8 to set the speeds tested + added option a to select the address range + added version string + improved help page

Author: RobTillaart

sketches/MultiSpeedI2CScanner/MultiSpeedI2CScanner.ino

@@ -1,7 +1,7 @@
 //
 // FILE: MultiSpeedI2CScanner.ino
 // AUTHOR: Rob Tillaart
-// VERSION: 0.1.04
+// VERSION: 0.1.05
 // PURPOSE: I2C scanner @different speeds
 // DATE: 2013-11-05
 // URL: http://forum.arduino.cc/index.php?topic=197360
@@ -12,12 +12,18 @@
 #include <Wire.h>
 #include <Arduino.h>
 
+const char version[] = "0.1.05";
+
 // scans devices from 50 to 800KHz I2C speeds.
 // lower than 50 is not possible
 // DS3231 RTC works on 800 KHz. TWBR = 2; (?)
-long speed[] = { 
+const long allSpeed[] = { 
  50, 100, 200, 250, 400, 500, 800 };
-const int speeds = sizeof(speed)/sizeof(speed[0]);
+long speed[sizeof(allSpeed)/sizeof(allSpeed[0])];
+int speeds;
+
+int addressStart = 0;
+int addressEnd = 127;
 
 // DELAY BETWEEN TESTS
 #define RESTORE_LATENCY 5 // for delay between tests of found devices.
@@ -39,13 +45,15 @@ void setup()
 {
  Serial.begin(115200);
  Wire.begin();
+ setSpeed('0');
  displayHelp();
 }
 
 
 void loop() 
 {
- switch (getCommand())
+ char command = getCommand();
+ switch (command)
  {
  case 's': 
  state = ONCE; 
@@ -58,25 +66,38 @@ void loop()
  Serial.print(F("<delay="));
  Serial.println(delayFlag?F("5>"):F("0>"));
  break;
+
  case 'e': 
  // eeprom test TODO
  break;
+
  case 'h': 
  header = !header;
  Serial.print(F("<header="));
  Serial.println(header?F("yes>"):F("no>"));
  break;
- case '?': 
- state = HELP; 
- break;
  case 'p': 
  printAll = !printAll;
  Serial.print(F("<print="));
  Serial.println(printAll?F("all>"):F("found>"));
  break;
+
+ case '0':
+ case '1':
+ case '2':
+ case '4':
+ case '8':
+ setSpeed(command);
+ break;
+
+ case 'a':
+ setAddress();
+ break;
+
  case 'q': 
+ case '?':
  state = HELP; 
- break;
+ break; 
  default:
  break;
  }
@@ -102,6 +123,57 @@ void loop()
  }
 }
 
+
+void setAddress()
+{
+ if (addressStart == 0)
+ {
+ addressStart = 8;
+ addressEnd = 120;
+ }
+ else
+ {
+ addressStart = 0;
+ addressEnd = 127;
+ }
+ Serial.print(F("<address Range = "));
+ Serial.print(addressStart);
+ Serial.print(F(".."));
+ Serial.print(addressEnd);
+ Serial.println(F(">"));
+
+}
+
+void setSpeed(char sp)
+{
+ switch(sp)
+ {
+ case '1':
+ speed[0] = 100;
+ speeds = 1;
+ break;
+ case '2':
+ speed[0] = 200;
+ speeds = 1;
+ break;
+ case '4':
+ speed[0] = 400;
+ speeds = 1;
+ break;
+ case '8':
+ speed[0] = 800;
+ speeds = 1;
+ break;
+ case '0':
+ speeds = sizeof(allSpeed)/sizeof(allSpeed[0]);
+ for (int i=0; i< speeds; i++)
+ {
+ speed[i] = allSpeed[i];
+ }
+ break;
+ }
+}
+
 char getCommand()
 {
  char c = '\0';
@@ -114,14 +186,25 @@ char getCommand()
 
 void displayHelp()
 {
- Serial.println(F("\nArduino I2C Scanner - 0.1.03\n"));
+ Serial.print(F("\nArduino I2C Scanner - "));
+ Serial.println(version);
+ Serial.println();
+ Serial.println(F("Scanmode:"));
  Serial.println(F("\ts = single scan"));
  Serial.println(F("\tc = continuous scan - 1 second delay"));
  Serial.println(F("\tq = quit continuous scan"));
- Serial.println(F("\td = toggle latency delay between successful tests."));
+ Serial.println(F("\td = toggle latency delay between successful tests. 0 - 5 ms"));
+ Serial.println(F("Output:"));
  Serial.println(F("\tp = toggle printAll - printFound."));
  Serial.println(F("\th = toggle header - noHeader."));
- Serial.println(F("\t? = help - this page"));
+ 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("\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("\n\t? = help - this page"));
  Serial.println();
 }
 
@@ -159,7 +242,7 @@ void I2Cscan()
  // 0000 1XX X	High Speed master code
  // 1111 1XX X	reserved - future purposes
  // 1111 0XX X	10-bit slave addressing
- for (uint8_t address = 8; address < 120; address++)
+ for (uint8_t address = addressStart; address <= addressEnd; address++)
  {
  bool printLine = printAll;
  bool found[speeds];
@@ -184,6 +267,7 @@ void I2Cscan()
  Serial.print(F("\t"));
  Serial.print(address, DEC);
  Serial.print(F("\t0x"));
+ if (address < 0x10) Serial.print(0, HEX);
  Serial.print(address, HEX);
  Serial.print(F("\t"));
 
@@ -207,3 +291,4 @@ void I2Cscan()
  }
 }
 
+