1 /**
2 * \file
3 *
4 * \brief TWI Master driver for SAM.
5 *
6 * Copyright (c) 2011-2016 Atmel Corporation. All rights reserved.
7 *
8 * \asf_license_start
9 *
10 * \page License
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions are met:
14 *
15 * 1. Redistributions of source code must retain the above copyright notice,
16 * this list of conditions and the following disclaimer.
17 *
18 * 2. Redistributions in binary form must reproduce the above copyright notice,
19 * this list of conditions and the following disclaimer in the documentation
20 * and/or other materials provided with the distribution.
21 *
22 * 3. The name of Atmel may not be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * 4. This software may only be redistributed and used in connection with an
26 * Atmel microcontroller product.
27 *
28 * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
29 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
30 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
31 * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
32 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
36 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
37 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
38 * POSSIBILITY OF SUCH DAMAGE.
39 *
40 * \asf_license_stop
41 *
42 */
43 /*
44 * Support and FAQ: visit <a href="http://www.atmel.com/design-support/">Atmel Support</a>
45 */
46
47 #ifndef _TWI_MASTER_H_
48 #define _TWI_MASTER_H_
49
50 #include "twi.h"
51 #include "sysclk.h"
52
53 typedef Twi *twi_master_t;
54 typedef twi_options_t twi_master_options_t;
55 typedef twi_packet_t twi_package_t;
56
twi_master_setup(twi_master_t p_twi,twi_master_options_t * p_opt)57 static inline uint32_t twi_master_setup(twi_master_t p_twi,
58 twi_master_options_t *p_opt)
59 {
60 p_opt->master_clk = sysclk_get_peripheral_hz();
61 p_opt->smbus = 0;
62 #if SAMG55
63 if (p_twi == TWI0) {
64 sysclk_enable_peripheral_clock(ID_FLEXCOM0);
65 } else if (p_twi == TWI1) {
66 sysclk_enable_peripheral_clock(ID_FLEXCOM1);
67 } else if (p_twi == TWI2) {
68 sysclk_enable_peripheral_clock(ID_FLEXCOM2);
69 } else if (p_twi == TWI3) {
70 sysclk_enable_peripheral_clock(ID_FLEXCOM3);
71 } else if (p_twi == TWI4) {
72 sysclk_enable_peripheral_clock(ID_FLEXCOM4);
73 } else if (p_twi == TWI5) {
74 sysclk_enable_peripheral_clock(ID_FLEXCOM5);
75 } else if (p_twi == TWI6) {
76 sysclk_enable_peripheral_clock(ID_FLEXCOM6);
77 #ifdef _SAMG55_FLEXCOM7_INSTANCE_
78 } else if (p_twi == TWI7) {
79 sysclk_enable_peripheral_clock(ID_FLEXCOM7);
80 #endif /* _SAMG55_FLEXCOM7_INSTANCE_*/
81 } else {
82 // Do Nothing
83 }
84 #else
85 #if (!(SAMG51 || SAMG53 || SAMG54))
86 if (p_twi == TWI0) {
87 sysclk_enable_peripheral_clock(ID_TWI0);
88 } else
89 #endif
90 if (p_twi == TWI1) {
91 sysclk_enable_peripheral_clock(ID_TWI1);
92 #if (SAM4N || SAMG)
93 } else if (p_twi == TWI2) {
94 sysclk_enable_peripheral_clock(ID_TWI2);
95 #endif
96 } else {
97 // Do Nothing
98 }
99 #endif
100
101 return (twi_master_init(p_twi, p_opt));
102 }
103
104 #define twi_master_enable(p_twi) twi_enable_master_mode(p_twi)
105 #define twi_master_disable(p_twi) twi_disable_master_mode(p_twi)
106
107 #endif // _TWI_MASTER_H_
108