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USI_TWI_Slave.h
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USI_TWI_Slave.h
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/********************************************************************************
Header file for the USI TWI Slave driver.
Created by Donald R. Blake
donblake at worldnet.att.net
---------------------------------------------------------------------------------
Created from Atmel source files for Application Note AVR312: Using the USI Module
as an I2C slave.
This program is free software; you can redistribute it and/or modify it under the
terms of the GNU General Public License as published by the Free Software
Foundation; either version 2 of the License, or (at your option) any later
version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE. See the GNU General Public License for more details.
---------------------------------------------------------------------------------
Change Activity:
Date Description
------ -------------
15 Mar 2007 Created.
********************************************************************************/
#ifndef _USI_TWI_SLAVE_H_
#define _USI_TWI_SLAVE_H_
/********************************************************************************
prototypes
********************************************************************************/
void usiTwiSlaveInit( uint8_t );
void usiTwiTransmitByte( uint8_t );
uint8_t usiTwiReceiveByte( void );
uint8_t usiTwiDataInReceiveBuffer( void );
void (*_onTwiDataRequest)(void);
uint8_t usiTwiDataInTransmitBuffer(void);
uint8_t usiTwiAmountDataInReceiveBuffer(void);
// on_XXX handler pointers
void (*usi_onRequestPtr)(void);
void (*usi_onReceiverPtr)(uint8_t);
/********************************************************************************
driver buffer definitions
********************************************************************************/
// permitted RX buffer sizes: 1, 2, 4, 8, 16, 32, 64, 128 or 256
#define TWI_RX_BUFFER_SIZE ( 32 )
#define TWI_RX_BUFFER_MASK ( TWI_RX_BUFFER_SIZE - 1 )
#if ( TWI_RX_BUFFER_SIZE & TWI_RX_BUFFER_MASK )
# error TWI RX buffer size is not a power of 2
#endif
// permitted TX buffer sizes: 1, 2, 4, 8, 16, 32, 64, 128 or 256
#define TWI_TX_BUFFER_SIZE ( 32 )
#define TWI_TX_BUFFER_MASK ( TWI_TX_BUFFER_SIZE - 1 )
#if ( TWI_TX_BUFFER_SIZE & TWI_TX_BUFFER_MASK )
# error TWI TX buffer size is not a power of 2
#endif
#endif // ifndef _USI_TWI_SLAVE_H_