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ThisIsMe

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About ThisIsMe

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    Seattle
  • Interests
    IoT
  1. ThisIsMe

    MSP430 and I2C

    I did not have Wire.setModule(0); (or 1) THanks to Rei Vilo for pointing out "setModule". The code works now: // This example code is in the public domain. #include <Wire.h> void setup() { Wire.setModule(1); // For MSP430FR5994 SCL(1) = pin 5.1 // SCA(1) = pin 5.0 Wire.begin(); Serial.begin(9600); Serial.println("\nlm75 Sensor"); } void loop() { // put your main code here, to run repeatedly: byte t; Wire.requestFrom(0x48, 1); // request 6 bytes from slave device #2 if(Wire.available()) t= Wire.read(); // if(Wire.available()) t[1]= Wire.read(); Serial.print("temp: "); Serial.print(t); Serial.print("\n"); delay(1000); } lm75-sensor.ino
  2. ThisIsMe

    MSP430 and I2C

    I have been trying to use a simple I2C sensor (LM75) with a MSP430FR5994. I find there are two pin maps. One at Energia (http://energia.nu/wordpress/wp-content/uploads/2016/11/Capture-2016-11-30-à-15.10.44.png) and one at TI directly (http://www.ti.com/lit/ml/slau677/slau677.pdf) on page 2. I have tried using I2C (1) as indicated at in the TI reference, and I have tried I2C (2) as indiicated in the Energia reference. neither one work. I can use an Arduino to access the sensor so I have some hope that this might work. What pins do I need to use to use I2C? Is there a library call to specify which I2C pins to use? By the way, I can connect to the board and load the blink sample, and I can do serial communication, so board connectivity is OK, I2C is not. Gerald
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