1 files changed, 104 insertions, 0 deletions
diff --git a/lib/msp430/twi.h b/lib/msp430/twi.h
new file mode 100644
index 0000000..ea383b6
--- /dev/null
+++ b/lib/msp430/twi.h
@@ -0,0 +1,104 @@
+/*
+  ************************************************************************
+  *	twi.h
+  *
+  *	Arduino core files for MSP430
+  *		Copyright (c) 2012 Robert Wessels. All right reserved.
+  *
+  *
+  ***********************************************************************
+  Derived from:
+  twi.h - TWI/I2C library for Wiring & Arduino
+  Copyright (c) 2006 Nicholas Zambetti.  All right reserved.
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library 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
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+#ifndef twi_h
+#define twi_h
+
+#include <msp430.h>
+
+#if !defined (__MSP430_HAS_USI__) && !defined (__MSP430_HAS_USCI__) && !defined (__MSP430_HAS_EUSCI_B0__)
+#ifndef __MSP430_HAS_USI__
+#error "********** USI not available"
+#endif
+
+#if !defined (__MSP430_HAS_USCI__) && !defined (__MSP430_HAS_EUSCI_B0__)
+#error "********** USCI not available"
+#endif
+#endif
+
+
+#include <inttypes.h>
+
+#ifndef TWI_FREQ
+#define TWI_FREQ 100000L
+#endif
+
+#ifndef TWI_BUFFER_LENGTH
+#define TWI_BUFFER_LENGTH 16
+#endif
+
+
+#define TWI_READY 0
+#define TWI_MRX   1
+#define TWI_MTX   2
+#define TWI_SRX   3
+#define TWI_STX   4
+
+
+#define TWI_SND_START 0
+#define TWI_PREP_SLA_ADDR_ACK 1
+#define TWI_MT_PROC_ADDR_ACK 2
+#define TWI_MT_PREP_DATA_ACK 3
+#define TWI_MT_PROC_DATA_ACK 4
+#define TWI_MR_PREP_DATA_RECV 5
+#define TWI_MR_PROC_DATA_RECV 6
+#define TWI_MR_PREP_STOP 7
+
+#define TWI_SL_START 8
+#define TWI_SL_PROC_ADDR 9
+#define TWI_SL_SEND_BYTE 10
+#define TWI_SL_PREP_DATA_ACK 11
+#define TWI_SL_PROC_DATA_ACK 12
+#define TWI_SL_RECV_BYTE 13
+#define TWI_SL_PROC_BYTE 14
+#define TWI_SL_RESET 15
+#define TWI_EXIT 16
+#define TWI_IDLE 17
+
+
+#define TWI_ERRROR_NO_ERROR 0
+#define TWI_ERROR_BUF_TO_LONG 1
+#define TWI_ERROR_ADDR_NACK 2
+#define TWI_ERROR_DATA_NACK 3
+#define TWI_ERROR_OTHER 4
+
+
+
+void twi_init(void);
+void twi_setAddress(uint8_t);
+uint8_t twi_readFrom(uint8_t, uint8_t*, uint8_t, uint8_t);
+uint8_t twi_writeTo(uint8_t, uint8_t*, uint8_t, uint8_t, uint8_t);
+uint8_t twi_transmit(const uint8_t*, uint8_t);
+void twi_attachSlaveRxEvent( void (*)(uint8_t*, int) );
+void twi_attachSlaveTxEvent( void (*)(void) );
+void twi_reply(uint8_t);
+void twi_stop(void);
+void twi_releaseBus(void);
+
+#endif
+