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Tool/software: Code Composer Studio
Hello,
I am trying to emulate 2 i2c slave devices with the TM4C123G. Basically I need to be able to receive i2c as slave in two adresses.
So from my rasberry pi which I have as the i2c master, I have connection to SCL2/SCL3 and SDA2/SDA3, and 10K pull up resistors, in place.
The following code partially works. i2cdetect will detect two devices at 0x40 and 0x42, but you can only write to 0x42 - and if you write to 0x40 it will crash. If the code is commented out to enable one i2c bus at one time, it will work for either i2c buses. I used 10K resistors, maybe that could be the problem.
But if there is a dual adress scheme for the tm4c it would be great, so i would not spend those extra pins.
Any ideas / help /recomendation greatly appreciated.
Best Regards,
C.A.
#include <Wire.h>
void setup() {
Wire.setModule(2);
Wire.onReceive(receiveEvent2);
Wire.begin(0x40);
Wire.setModule(3);
Wire.onReceive(receiveEvent3);
Wire.begin(0x42);
Serial.begin(230400);
Serial.println("INIT");
}
void loop() {
}
void receiveEvent2(int n) {
Wire.setModule(2);
Serial.print("2:\t");
while(0 < Wire.available()) {
int c = Wire.read();
Serial.print(c);
Serial.print('\t');
}
Serial.println();
}
void receiveEvent3(int n) {
Wire.setModule(3);
Serial.print("3:\t");
while(0 < Wire.available()) {
int c = Wire.read();
Serial.print(c);
Serial.print('\t');
}
Serial.println();
}
