Status codes returned by the TWI hardware interface. More...

Macros
#define	TWI_STATUS_START 0x08
	Status code indicating START condition has been transmitted.
#define	TWI_STATUS_REPEATED_START 0x10
	Status code indicating a repeated START condition has been transmitted.
#define	TWI_STATUS_ADDRESS_WRITE_NACK 0x18
	Status code indicating SLA+W has been transmitted and NOT acknowledged.
#define	TWI_STATUS_ADDRESS_WRITE_ACK 0x20
	Status code indicating SLA+W has been transmitted and acknowledged.
#define	TWI_STATUS_DATA_WRITE_NACK 0x28
	Status code indicating data byte has been transmitted and NOT acknowledged.
#define	TWI_STATUS_DATA_WRITE_ACK 0x30
	Status code indicating data byte has been transmitted and acknowledged.
#define	TWI_STATUS_ARBITRATION_LOST 0x38
	Status code indicating arbitration has been lost in SLA+W or data bytes.
#define	TWI_STATUS_ADDRESS_READ_ACK 0x40
	Status code indicating SLA+R has been transmitted and acknowledged.
#define	TWI_STATUS_ADDRESS_READ_NACK 0x48
	Status code indicating SLA+R has been transmitted and NOT acknowledged.
#define	TWI_STATUS_DATA_READ_ACK 0x50
	Status code indicating data byte has been received and acknowledged.
#define	TWI_STATUS_DATA_READ_NACK 0x58
	Status code indicating data byte has been received and NOT acknowledged.

Detailed Description

Status codes returned by the TWI hardware interface.

These macros define the possible TWI status codes as returned in the TWSR register, representing various states and events such as start conditions, address acknowledgments, data transfer acknowledgments, arbitration loss, and error conditions.

Macro Definition Documentation

◆ TWI_STATUS_ADDRESS_READ_ACK

#define TWI_STATUS_ADDRESS_READ_ACK 0x40

Status code indicating SLA+R has been transmitted and acknowledged.

◆ TWI_STATUS_ADDRESS_READ_NACK

#define TWI_STATUS_ADDRESS_READ_NACK 0x48

Status code indicating SLA+R has been transmitted and NOT acknowledged.

◆ TWI_STATUS_ADDRESS_WRITE_ACK

#define TWI_STATUS_ADDRESS_WRITE_ACK 0x20

Status code indicating SLA+W has been transmitted and acknowledged.

◆ TWI_STATUS_ADDRESS_WRITE_NACK

#define TWI_STATUS_ADDRESS_WRITE_NACK 0x18

Status code indicating SLA+W has been transmitted and NOT acknowledged.

◆ TWI_STATUS_ARBITRATION_LOST

#define TWI_STATUS_ARBITRATION_LOST 0x38

Status code indicating arbitration has been lost in SLA+W or data bytes.

◆ TWI_STATUS_DATA_READ_ACK

#define TWI_STATUS_DATA_READ_ACK 0x50

Status code indicating data byte has been received and acknowledged.

◆ TWI_STATUS_DATA_READ_NACK

#define TWI_STATUS_DATA_READ_NACK 0x58

Status code indicating data byte has been received and NOT acknowledged.

◆ TWI_STATUS_DATA_WRITE_ACK

#define TWI_STATUS_DATA_WRITE_ACK 0x30

Status code indicating data byte has been transmitted and acknowledged.

◆ TWI_STATUS_DATA_WRITE_NACK

#define TWI_STATUS_DATA_WRITE_NACK 0x28

Status code indicating data byte has been transmitted and NOT acknowledged.

◆ TWI_STATUS_REPEATED_START

#define TWI_STATUS_REPEATED_START 0x10

Status code indicating a repeated START condition has been transmitted.

◆ TWI_STATUS_START

#define TWI_STATUS_START 0x08

Status code indicating START condition has been transmitted.

Macros