#include "driverlib.h"

Macros
#define	SLAVE_ADDRESS 0x48

#define	CS_SMCLK_DESIRED_FREQUENCY_IN_KHZ 1000

#define	CS_SMCLK_FLLREF_RATIO 30

Functions
void	main (void)

Variables
uint8_t	RXData

Macro Definition Documentation

◆ CS_SMCLK_DESIRED_FREQUENCY_IN_KHZ

#define CS_SMCLK_DESIRED_FREQUENCY_IN_KHZ 1000

Definition at line 89 of file eusci_b_i2c_ex2_masterRxSingle.c.

◆ CS_SMCLK_FLLREF_RATIO

#define CS_SMCLK_FLLREF_RATIO 30

Definition at line 96 of file eusci_b_i2c_ex2_masterRxSingle.c.

◆ SLAVE_ADDRESS

#define SLAVE_ADDRESS 0x48

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

Description: This demo connects two MSP430's via the I2C bus. The master reads from the slave. This is the MASTER CODE. The data from the slave transmitter begins at 0 and increments with each transfer. The USCI_B0 RX interrupt is used to know when new data has been received. ACLK = n/a, MCLK = SMCLK = BRCLK = DCO = ~1MHz

                          /|\  /|\
         MSP430FR4133      10k  10k     MSP430FR4133
             slave         |    |        master
       -----------------   |    |   -----------------
     -|XIN  P5.2/UCB0SDA|<-|----+->|P5.2/UCB0SDA  XIN|-
      |                 |  |       |                 | 32kHz
     -|XOUT             |  |       |             XOUT|-
      |     P5.3/UCB0SCL|<-+------>|P5.3/UCB0SCL     |
      |                 |          |             P1.0|--> LED

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
CS

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.