eusci_b_i2c_ex2_slaveTxSingle.c File Reference

#include "driverlib.h"

Go to the source code of this file.

Macros
#define	SLAVE_ADDRESS   0x48

Functions
void	main (void)
void	USCIB0_ISR (void)

Variables
uint8_t	TXData = 0x00

Macro Definition Documentation

SLAVE_ADDRESS

#define SLAVE_ADDRESS   0x48

Description: This demo connects two MSP430's via the I2C bus. The master reads from the slave. This is the SLAVE code. The TX data begins at 0 and is incremented each time it is sent. A stop condition is used as a trigger to increment the outgoing data. The USCI_B0 TX interrupt is used to know when to TX. Tested on MSP430F67791A

  /|\  /|\
   10k  10k

slave | | master --------------— | | --------------— -|XIN P2.6/UCB0SDA|<-|-—+->|P2.6/UCB0SDA XIN|- | | | | | -|XOUT | | | XOUT|- | P2.5/UCB0SCL|<-+---—>|P2.5/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.

• USCI_B0_VECTOR.

Definition at line 78 of file eusci_b_i2c_ex2_slaveTxSingle.c.

Function Documentation

main()

void main

(

void

)

Definition at line 82 of file eusci_b_i2c_ex2_slaveTxSingle.c.

References __no_operation(), param, and SLAVE_ADDRESS.

USCIB0_ISR()

void USCIB0_ISR

(

void

)

Definition at line 128 of file eusci_b_i2c_ex2_slaveTxSingle.c.

References TXData.

Variable Documentation

TXData

uint8_t TXData = 0x00

Definition at line 80 of file eusci_b_i2c_ex2_slaveTxSingle.c.

Referenced by USCIB0_ISR().