1 /**
2 * \file
3 *
4 * \brief SAM GPIO Port Driver
5 *
6 * Copyright (C) 2012-2015 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 #include <port.h>
47
48 /**
49 * \brief Writes a Port pin configuration to the hardware module.
50 *
51 * Writes out a given configuration of a Port pin configuration to the hardware
52 * module.
53 *
54 * \note If the pin direction is set as an output, the pull-up/pull-down input
55 * configuration setting is ignored.
56 *
57 * \param[in] gpio_pin Index of the GPIO pin to configure
58 * \param[in] config Configuration settings for the pin
59 */
port_pin_set_config(const uint8_t gpio_pin,const struct port_config * const config)60 void port_pin_set_config(
61 const uint8_t gpio_pin,
62 const struct port_config *const config)
63 {
64 /* Sanity check arguments */
65 Assert(config);
66
67 struct system_pinmux_config pinmux_config;
68 system_pinmux_get_config_defaults(&pinmux_config);
69
70 pinmux_config.mux_position = SYSTEM_PINMUX_GPIO;
71 pinmux_config.direction = (enum system_pinmux_pin_dir)config->direction;
72 pinmux_config.input_pull = (enum system_pinmux_pin_pull)config->input_pull;
73 pinmux_config.powersave = config->powersave;
74
75 system_pinmux_pin_set_config(gpio_pin, &pinmux_config);
76 }
77
78 /**
79 * \brief Writes a Port group configuration group to the hardware module.
80 *
81 * Writes out a given configuration of a Port group configuration to the
82 * hardware module.
83 *
84 * \note If the pin direction is set as an output, the pull-up/pull-down input
85 * configuration setting is ignored.
86 *
87 * \param[out] port Base of the PORT module to write to
88 * \param[in] mask Mask of the port pin(s) to configure
89 * \param[in] config Configuration settings for the pin group
90 */
port_group_set_config(PortGroup * const port,const uint32_t mask,const struct port_config * const config)91 void port_group_set_config(
92 PortGroup *const port,
93 const uint32_t mask,
94 const struct port_config *const config)
95 {
96 /* Sanity check arguments */
97 Assert(port);
98 Assert(config);
99
100 struct system_pinmux_config pinmux_config;
101 system_pinmux_get_config_defaults(&pinmux_config);
102
103 pinmux_config.mux_position = SYSTEM_PINMUX_GPIO;
104 pinmux_config.direction = (enum system_pinmux_pin_dir)config->direction;
105 pinmux_config.input_pull = (enum system_pinmux_pin_pull)config->input_pull;
106 pinmux_config.powersave = config->powersave;
107
108 system_pinmux_group_set_config(port, mask, &pinmux_config);
109 }
110