#include "driverlib.h"

Macros
#define	SLAVE_ADDRESS 0x48

Functions
void	main (void)

Variables
uint8_t	transmitData

Macro Definition Documentation

◆ SLAVE_ADDRESS

#define SLAVE_ADDRESS 0x48

This example shows how to configure the I2C module as a master for single byte transmission in interrupt mode. The address of the slave module that the master is communicating with also set in this example.

Demo - EUSCI_B0 I2C Master TX single bytes to MSP430 Slave

Description: This demo connects two MSP430's via the I2C bus. The master transmits to the slave. This is the master code. It continuously transmits 00h, 01h, ..., 0ffh and demonstrates how to implement an I2C master transmitter sending a single byte using the USCI_B0 TX interrupt. ACLK = n/a, MCLK = SMCLK = BRCLK = default DCO = ~1.045MHz

                          /|\  /|\
          MSP430FR5969    10k  10k     MSP430FR5969
             slave         |    |         master
       -----------------   |    |   -----------------
     -|XIN  P1.6/UCB0SDA|<-|----+->|P1.6/UCB0SDA  XIN|-
      |                 |  |       |                 |
     -|XOUT             |  |       |             XOUT|-
      |     P1.7/UCB0SCL|<-+------>|P1.7/UCB0SCL     |
      |                 |          |                 |

This example uses the following peripherals and I/O signals. You must review these and change as needed for your own board:

I2C peripheral
GPIO Port peripheral (for I2C pins)
SCL2
SDA

This example uses the following interrupt handlers. To use this example in your own application you must add these interrupt handlers to your vector table.