54 lines
1.1 KiB
Arduino
54 lines
1.1 KiB
Arduino
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// Warning only use this for hardware debug!
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// See which addresses respond to a start condition.
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#include <I2cMaster.h>
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// select software or hardware i2c
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#define USE_SOFT_I2C 0
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#if USE_SOFT_I2C
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// use analog pins 4 and 5 for this example
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// this allows a 328 shield to be used on the Mega
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// edit next two line to change pins
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const uint8_t SDA_PIN = A4;
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const uint8_t SCL_PIN = A5;
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// An instance of class for software master
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SoftI2cMaster i2c(SDA_PIN, SCL_PIN);
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#else // USE_SOFT_I2C
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// hardware master with pullups enabled
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TwiMaster i2c(true);
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#endif // USE_SOFT_I2C
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//------------------------------------------------------------------------------
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void setup(void) {
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Serial.begin(9600);
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uint8_t add = 0;
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// try read
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do {
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if (i2c.start(add | I2C_READ)) {
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Serial.print("Add read: 0X");
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Serial.println(add, HEX);
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i2c.read(true);
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}
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i2c.stop();
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add += 2;
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} while (add);
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// try write
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add = 0;
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do {
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if (i2c.start(add | I2C_WRITE)) {
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Serial.print("Add write: 0X");
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Serial.println(add, HEX);
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}
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i2c.stop();
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add += 2;
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} while (add);
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Serial.println("Done");
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}
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void loop(void){}
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