NIBO Library: nibo/i2cmaster.h Quellcode

NIBO Library 2.11
00001 /*  BSD-License:
00002 
00003 Copyright (c) 2007 by Nils Springob, nicai-systems, Germany
00004 
00005 All rights reserved.
00006 
00007 Redistribution and use in source and binary forms, with or without modification,
00008 are permitted provided that the following conditions are met:
00009 
00010   * Redistributions of source code must retain the above copyright notice,
00011     this list of conditions and the following disclaimer.
00012   * Redistributions in binary form must reproduce the above copyright notice,
00013     this list of conditions and the following disclaimer in the documentation
00014     and/or other materials provided with the distribution.
00015   * Neither the name nicai-systems nor the names of its contributors may be
00016     used to endorse or promote products derived from this software without
00017     specific prior written permission.
00018 
00019 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
00020 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
00021 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
00022 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
00023 CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
00024 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
00025 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
00026 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
00027 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
00028 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
00029 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00030 
00031 */
00032 
00039 #ifndef NIBO_I2CMASTER_H_
00040 #define NIBO_I2CMASTER_H_
00041 #if defined(NIBO_USE_I2CMASTER) || defined (DOXYGEN)
00042 
00043 #include <stdint.h>
00044 
00045 #ifdef __cplusplus
00046 extern "C" {
00047 #endif
00048 
00049 
00050 #ifdef NIBO_I2C_TXRX
00051 
00055 extern volatile uint8_t i2c_tx_size;
00056 
00060 extern volatile uint8_t i2c_rx_size;
00061 
00062 #else
00063 
00067 extern volatile uint8_t i2c_size;
00068 
00069 #endif
00070 
00071 
00075 extern uint8_t i2c_buf[I2C_BUF_SIZE];
00076 
00080 enum {
00081   I2C_BUSY,
00082   I2C_IDLE,
00083   I2C_SUCCESS,
00084   I2C_ERROR=0x10
00085 };
00086 
00090 void i2c_init(void);
00091 
00095 uint8_t i2c_start_transmission(void);
00096 
00100 uint8_t i2c_status(void);
00101 
00102 extern volatile uint8_t i2c_last_TWSR;
00103 extern volatile uint8_t i2c_pos;
00104 
00108 uint8_t i2c_wait_transmission(void);
00109 
00110 #define I2C_TX(ADDR) ((ADDR)<<1)
00111 #define I2C_RX(ADDR) (((ADDR)<<1)+1)
00112 
00113 #ifdef __cplusplus
00114 } // extern "C"
00115 #endif
00116 
00117 #endif // NIBO_USE_I2CMASTER
00118 #endif // NIBO_I2CMASTER_H_