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mgk/SAMDChipId.ino

Created January 29, 2016 15:25
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Arduino SAMD / Arduino Zero / Arduino M0 chip unique serial number
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SAMDChipId.ino
/**
* Print SAMD chip serial number.
*
* http://atmel.force.com/support/articles/en_US/FAQ/Reading-unique-serial-number-on-SAM-D20-SAM-D21-SAM-R21-devices
*/
void setup() {
Serial.begin(9600);
delay(1000);
}
void loop() {
printChipId();
delay(3000);
}
void printChipId() {
volatile uint32_t val1, val2, val3, val4;
volatile uint32_t *ptr1 = (volatile uint32_t *)0x0080A00C;
val1 = *ptr1;
volatile uint32_t *ptr = (volatile uint32_t *)0x0080A040;
val2 = *ptr;
ptr++;
val3 = *ptr;
ptr++;
val4 = *ptr;
Serial.print("chip id: 0x");
char buf[33];
sprintf(buf, "%8x%8x%8x%8x", val1, val2, val3, val4);
Serial.println(buf);
}
@SWoto
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SWoto commented Jul 2, 2020

Thank you, it worked for me.

@eyetach
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eyetach commented Jan 18, 2021

Hey thanks! Worked for me on Adafruit FeatherM0's. Before this I had been using extra analog pins to hardwire unique ID's for feathers with RFM69 packet radios.

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