NiboRoboLib 3.6 - NIBObee Library
i2cmaster.h
gehe zur Dokumentation dieser Datei
1 /* BSD-License:
2 
3 Copyright (c) 2007 by Nils Springob, nicai-systems, Germany
4 
5 All rights reserved.
6 
7 Redistribution and use in source and binary forms, with or without modification,
8 are permitted provided that the following conditions are met:
9 
10  * Redistributions of source code must retain the above copyright notice,
11  this list of conditions and the following disclaimer.
12  * Redistributions in binary form must reproduce the above copyright notice,
13  this list of conditions and the following disclaimer in the documentation
14  and/or other materials provided with the distribution.
15  * Neither the name nicai-systems nor the names of its contributors may be
16  used to endorse or promote products derived from this software without
17  specific prior written permission.
18 
19 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
23 CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
24 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
26 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
27 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
28 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
29 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 
31 */
32 
39 #ifndef NIBOBEE_I2CMASTER_H_
40 #define NIBOBEE_I2CMASTER_H_
41 
42 #include <stdint.h>
43 
44 #ifdef __cplusplus
45 extern "C" {
46 #endif
47 
48 #define I2C_BUF_SIZE 0x25
49 #define NIBO_I2C_TXRX 1
50 #define I2C_TWBR_INIT 100
51 
52 
53 #ifdef NIBO_I2C_TXRX
54 
58 extern volatile uint8_t i2c_tx_size;
59 
63 extern volatile uint8_t i2c_rx_size;
64 
65 #else
66 
70 extern volatile uint8_t i2c_size;
71 
72 #endif
73 
74 
78 extern uint8_t i2c_buf[I2C_BUF_SIZE];
79 
83 enum {
84  I2C_BUSY,
85  I2C_IDLE,
86  I2C_SUCCESS,
87  I2C_ERROR=0x10
88 };
89 
93 void i2c_init(void);
94 
98 uint8_t i2c_start_transmission(void);
99 
103 uint8_t i2c_status(void);
104 
105 extern volatile uint8_t i2c_last_TWSR;
106 extern volatile uint8_t i2c_pos;
107 
111 uint8_t i2c_wait_transmission(void);
112 
113 #define I2C_TX(ADDR) ((ADDR)<<1)
114 #define I2C_RX(ADDR) (((ADDR)<<1)+1)
115 
116 #ifdef __cplusplus
117 } // extern "C"
118 #endif
119 
120 #endif // NIBOBEE_I2CMASTER_H_
volatile uint8_t i2c_rx_size
uint8_t i2c_start_transmission(void)
void i2c_init(void)
volatile uint8_t i2c_tx_size
uint8_t i2c_wait_transmission(void)
uint8_t i2c_buf[I2C_BUF_SIZE]
uint8_t i2c_status(void)