mirror of
https://github.com/RobTillaart/Arduino.git
synced 2024-09-19 16:46:11 -04:00
419 lines
8.6 KiB
C++
419 lines
8.6 KiB
C++
//
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// FILE: MultiSpeedI2CScanner.ino
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// AUTHOR: Rob Tillaart
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// VERSION: 0.1.11
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// PURPOSE: I2C scanner at different speeds
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// DATE: 2013-11-05
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// URL: https://github.com/RobTillaart/MultiSpeedI2CScanner
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// URL: http://forum.arduino.cc/index.php?topic=197360
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//
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#include <Arduino.h>
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#include <Wire.h>
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TwoWire *wi;
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const char version[] = "0.1.11";
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// INTERFACE COUNT (TESTED TEENSY 3.5 AND ARDUINO DUE ONLY)
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int wirePortCount = 1;
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int selectedWirePort = 0;
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// scans devices from 50 to 800KHz I2C speeds.
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// speed lower than 50 and above 400 can cause problems
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long speed[10] = { 100, 200, 300, 400 };
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int speeds;
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int addressStart = 0;
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int addressEnd = 127;
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// DELAY BETWEEN TESTS
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#ifndef RESTORE_LATENCY
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#define RESTORE_LATENCY 5 // for delay between tests of found devices.
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#endif
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bool delayFlag = false;
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// MINIMIZE OUTPUT
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bool printAll = true;
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bool header = true;
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bool disableIRQ = false;
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// STATE MACHINE
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enum states {
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STOP, ONCE, CONT, HELP
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};
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states state = STOP;
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// TIMING
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uint32_t startScan;
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uint32_t stopScan;
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void setup()
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{
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Serial.begin(115200);
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#if defined (ESP8266) || defined(ESP32)
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uint8_t sda = 21;
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uint8_t scl = 22;
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Wire.begin(sda, scl, 100000); // ESP32 - change config pins if needed.
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#else
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Wire.begin();
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#endif
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#if defined WIRE_IMPLEMENT_WIRE1 || WIRE_INTERFACES_COUNT > 1
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Wire1.begin();
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wirePortCount++;
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#endif
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#if defined WIRE_IMPLEMENT_WIRE2 || WIRE_INTERFACES_COUNT > 2
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Wire2.begin();
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wirePortCount++;
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#endif
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#if defined WIRE_IMPLEMENT_WIRE3 || WIRE_INTERFACES_COUNT > 3
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Wire3.begin();
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wirePortCount++;
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#endif
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wi = &Wire;
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Serial.println();
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setSpeed('9');
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displayHelp();
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}
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void loop()
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{
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yield();
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char command = getCommand();
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switch (command)
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{
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case '@':
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selectedWirePort = (selectedWirePort + 1) % wirePortCount;
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Serial.print(F("<I2C PORT=Wire"));
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Serial.print(selectedWirePort);
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Serial.println(F(">"));
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switch (selectedWirePort)
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{
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case 0:
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wi = &Wire;
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break;
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#if defined WIRE_IMPLEMENT_WIRE1 || WIRE_INTERFACES_COUNT > 1
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case 1:
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wi = &Wire1;
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break;
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#endif
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#if defined WIRE_IMPLEMENT_WIRE2 || WIRE_INTERFACES_COUNT > 2
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case 2:
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wi = &Wire2;
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break;
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#endif
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#if defined WIRE_IMPLEMENT_WIRE3 || WIRE_INTERFACES_COUNT > 3
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case 3:
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wi = &Wire3;
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break;
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#endif
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}
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break;
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case 's':
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state = ONCE;
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break;
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case 'c':
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state = CONT;
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break;
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case 'd':
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delayFlag = !delayFlag;
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Serial.print(F("<delay="));
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Serial.println(delayFlag ? F("5>") : F("0>"));
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break;
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case 'e':
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// eeprom test TODO
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break;
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case 'h':
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header = !header;
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Serial.print(F("<header="));
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Serial.println(header ? F("yes>") : F("no>"));
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break;
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case 'p':
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printAll = !printAll;
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Serial.print(F("<print="));
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Serial.println(printAll ? F("all>") : F("found>"));
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break;
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case 'i':
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disableIRQ = !disableIRQ;
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Serial.print(F("<irq="));
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Serial.println(disableIRQ ? F("diabled>") : F("enabled>"));
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break;
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case '0':
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case '1':
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case '2':
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case '4':
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case '8':
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case '9':
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case 'M':
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case 'N':
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case 'O':
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case 'P':
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setSpeed(command);
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break;
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case 'a':
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setAddress();
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break;
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case 'q':
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case '?':
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state = HELP;
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break;
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default:
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break;
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}
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switch (state)
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{
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case ONCE:
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I2Cscan();
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state = HELP;
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break;
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case CONT:
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I2Cscan();
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delay(1000);
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break;
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case HELP:
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displayHelp();
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state = STOP;
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break;
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case STOP:
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break;
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default: // ignore all non commands
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break;
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}
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}
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void setAddress()
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{
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if (addressStart == 0)
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{
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addressStart = 8;
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addressEnd = 120;
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}
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else
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{
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addressStart = 0;
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addressEnd = 127;
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}
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Serial.print(F("<address Range = "));
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Serial.print(addressStart);
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Serial.print(F(".."));
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Serial.print(addressEnd);
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Serial.println(F(">"));
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}
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void setSpeed(char sp)
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{
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switch (sp)
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{
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case '1':
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speed[0] = 100;
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speeds = 1;
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break;
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case '2':
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speed[0] = 200;
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speeds = 1;
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break;
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case '4':
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speed[0] = 400;
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speeds = 1;
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break;
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case '8':
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speed[0] = 800;
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speeds = 1;
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break;
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case '9': // limited to 400KHz
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speeds = 8;
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for (int i = 1; i <= speeds; i++) speed[i - 1] = i * 50;
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break;
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case '0': // limited to 800KHz
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speeds = 8;
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for (int i = 1; i <= speeds; i++) speed[i - 1] = i * 100;
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break;
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// new in 0.1.10 - experimental
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case 'M':
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speed[0] = 1000;
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speeds = 1;
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break;
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case 'N':
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speed[0] = 3400;
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speeds = 1;
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break;
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case 'O':
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speed[0] = 5000;
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speeds = 1;
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break;
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case 'P':
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speed[0] = 100;
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speed[1] = 400;
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speed[2] = 1000;
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speed[3] = 3400;
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speed[4] = 5000;
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speeds = 5;
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break;
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}
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Serial.print("<speeds =");
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for (int i = 0; i < speeds; i++)
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{
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Serial.print(' ');
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Serial.print(speed[i]);
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}
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Serial.println(" >");
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}
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char getCommand()
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{
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char c = '\0';
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if (Serial.available())
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{
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c = Serial.read();
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}
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return c;
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}
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void displayHelp()
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{
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Serial.print(F("\nArduino MultiSpeed I2C Scanner - "));
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Serial.println(version);
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Serial.println();
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Serial.print(F("I2C ports: "));
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Serial.print(wirePortCount);
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Serial.print(F(" Current: Wire"));
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Serial.println(selectedWirePort);
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Serial.println(F("\t@ = toggle Wire - Wire1 - Wire2 [TEENSY 3.5 or Arduino Due]"));
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Serial.println(F("Scan mode:"));
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Serial.println(F("\ts = single scan"));
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Serial.println(F("\tc = continuous scan - 1 second delay"));
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Serial.println(F("\tq = quit continuous scan"));
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Serial.println(F("\td = toggle latency delay between successful tests. 0 - 5 ms"));
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Serial.println(F("\ti = toggle enable/disable interrupts"));
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Serial.println(F("Output:"));
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Serial.println(F("\tp = toggle printAll - printFound."));
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Serial.println(F("\th = toggle header - noHeader."));
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Serial.println(F("\ta = toggle address range, 0..127 - 8..120"));
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Serial.println(F("Speeds:"));
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Serial.println(F("\t0 = 100..800 Khz - step 100 (warning - can block!!)"));
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Serial.println(F("\t1 = 100 KHz"));
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Serial.println(F("\t2 = 200 KHz"));
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Serial.println(F("\t4 = 400 KHz"));
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Serial.println(F("\t9 = 50..400 Khz - step 50 < DEFAULT >"));
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Serial.println();
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Serial.println(F("\t!! HIGH SPEEDS - WARNING - can block - not applicable for UNO"));
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Serial.println(F("\t8 = 800 KHz"));
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Serial.println(F("\tM = 1000 KHz"));
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Serial.println(F("\tN = 3400 KHz"));
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Serial.println(F("\tO = 5000 Khz"));
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Serial.println(F("\tP = 100 400 1000 3400 5000 Khz (standards)"));
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Serial.println(F("\n\t? = help - this page"));
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Serial.println();
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}
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void I2Cscan()
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{
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startScan = millis();
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uint8_t count = 0;
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if (disableIRQ) noInterrupts();
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if (header)
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{
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Serial.print(F("TIME\tDEC\tHEX\t"));
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for (uint8_t s = 0; s < speeds; s++)
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{
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Serial.print(F("\t"));
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Serial.print(speed[s]);
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}
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Serial.println(F("\t[KHz]"));
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for (uint8_t s = 0; s < speeds + 5; s++)
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{
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Serial.print(F("--------"));
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}
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Serial.println();
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}
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for (uint8_t address = addressStart; address <= addressEnd; address++)
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{
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bool printLine = printAll;
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bool found[speeds];
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bool fnd = false;
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for (uint8_t s = 0; s < speeds ; s++)
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{
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yield(); // keep ESP happy
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#if ARDUINO < 158 && defined (TWBR)
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uint16_t PREV_TWBR = TWBR;
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TWBR = (F_CPU / (speed[s] * 1000) - 16) / 2;
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if (TWBR < 2)
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{
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Serial.println("ERROR: not supported speed");
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TWBR = PREV_TWBR;
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return;
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}
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#else
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wi->setClock(speed[s] * 1000UL);
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#endif
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wi->beginTransmission (address);
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found[s] = (wi->endTransmission () == 0);
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fnd |= found[s];
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// give device 5 millis
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if (fnd && delayFlag) delay(RESTORE_LATENCY);
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}
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if (fnd) count++;
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printLine |= fnd;
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if (printLine)
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{
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Serial.print(millis());
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Serial.print(F("\t"));
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Serial.print(address, DEC);
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Serial.print(F("\t0x"));
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if (address < 0x10) Serial.print(0, HEX);
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Serial.print(address, HEX);
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Serial.print(F("\t"));
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for (uint8_t s = 0; s < speeds ; s++)
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{
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Serial.print(F("\t"));
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Serial.print(found[s] ? F("V") : F("."));
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}
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Serial.println();
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}
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}
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stopScan = millis();
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if (header)
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{
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Serial.println();
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Serial.print(count);
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Serial.print(F(" devices found in "));
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Serial.print(stopScan - startScan);
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Serial.println(F(" milliseconds."));
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}
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interrupts();
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}
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// -- END OF FILE --
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