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https://github.com/RobTillaart/Arduino.git
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70 lines
1.3 KiB
C++
70 lines
1.3 KiB
C++
//
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// FILE: Set2query.ino
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// AUTHOR: Rob Tillaart
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// PURPOSE: Reset HMC6352 to query mode without library
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#include <Wire.h>
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int HMC = 0x21;
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int ledPin = 13;
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boolean ledState = LOW;
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void setup()
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{
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Serial.begin(115200);
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Serial.print("HMC6352 : start - ");
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Serial.println(HMC, HEX);
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pinMode(ledPin, OUTPUT);
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digitalWrite(ledPin, ledState);
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Wire.begin();
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delay(1000); // give all things time to start
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}
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void loop()
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{
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// flashing means not blocking
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ledState = !ledState;
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digitalWrite(ledPin, ledState);
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// write query mode to RAM 0x74 and do an L command immediately after it
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// this is done to "break through" the continuous mode if needed
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// pull out 5 volt if it reads back 0x50
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Wire.beginTransmission(HMC);
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Wire.write('G');
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Wire.write(0x74);
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Wire.write(0x51); // 10 Hz | Reset = True | QUERY
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Wire.write('L');
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// Wire.write('O'); optional reset
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Wire.endTransmission();
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delay(10);
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// Read the EEPROM value for feedback as this is the next startup value
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Wire.beginTransmission(HMC);
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Wire.write('r');
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Wire.write(0x07);
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Wire.endTransmission();
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delay(10);
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int cnt = Wire.requestFrom(HMC, 1);
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if (cnt == 1)
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{
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Serial.print("Current Mode: ");
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Serial.println((int)Wire.read(), BIN);
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}
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else
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{
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Serial.print("Error... : ");
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Serial.println(cnt);
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}
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}
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// -- END OF FILE --
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