2 * Author: Brendan Le Foll <brendan.le.foll@intel.com>
3 * Author: Thomas Ingleby <thomas.c.ingleby@intel.com>
4 * Copyright © 2014 Intel Corporation
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to
8 * deal in the Software without restriction, including without limitation the
9 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
10 * sell copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
29 #define MRAA_PLATFORM_NAME_MAX_SIZE 64
33 * This file defines the basic shared values for libmraa
44 typedef unsigned int mraa_boolean_t;
47 * A bitfield representing the capabilities of a pin.
51 mraa_boolean_t valid:1; /**< Is the pin valid at all */
52 mraa_boolean_t gpio:1; /**< Is the pin gpio capable */
53 mraa_boolean_t pwm:1; /**< Is the pin pwm capable */
54 mraa_boolean_t fast_gpio:1; /**< Is the pin fast gpio capable */
55 mraa_boolean_t spi:1; /**< Is the pin spi capable */
56 mraa_boolean_t i2c:1; /**< Is the pin i2c capable */
57 mraa_boolean_t aio:1; /**< Is the pin analog input capable */
58 mraa_boolean_t uart:1; /**< Is the pin uart capable */
60 } mraa_pincapabilities_t;
63 * A Structure representing a multiplexer and the required value
67 unsigned int pin; /**< Raw GPIO pin id */
68 unsigned int value; /**< Raw GPIO value */
73 mraa_boolean_t complex_pin:1;
74 mraa_boolean_t output_en:1;
75 mraa_boolean_t output_en_high:1;
76 mraa_boolean_t pullup_en:1;
77 mraa_boolean_t pullup_en_hiz:1;
78 } mraa_pin_cap_complex_t;
82 unsigned int pinmap; /**< sysfs pin */
83 unsigned int parent_id; /** parent chip id */
84 unsigned int mux_total; /** Numfer of muxes needed for operation of pin */
85 mraa_mux_t mux[6]; /** Array holding information about mux */
86 unsigned int output_enable; /** Output Enable GPIO, for level shifting */
87 unsigned int pullup_enable; /** Pull-Up enable GPIO, inputs */
88 mraa_pin_cap_complex_t complex_cap;
94 char mem_dev[32]; /**< Memory device to use /dev/uio0 etc */
95 unsigned int mem_sz; /** Size of memory to map */
96 unsigned int bit_pos; /** Position of value bit */
97 mraa_pin_t gpio; /** GPio context containing none mmap info */
102 * A Structure representing a physical Pin.
106 char name[8]; /**< Pin's real world name */
107 mraa_pincapabilities_t capabilites; /**< Pin Capabiliites */
108 mraa_pin_t gpio; /**< GPIO structure */
109 mraa_pin_t pwm; /**< PWM structure */
110 mraa_pin_t aio; /**< Anaglog Pin */
111 mraa_mmap_pin_t mmap; /**< GPIO through memory */
112 mraa_pin_t i2c; /**< i2c bus/pin */
113 mraa_pin_t spi; /**< spi bus/pin */
114 mraa_pin_t uart; /**< uart module/pin */
119 * A Structure representing the physical properties of a i2c bus.
123 unsigned int bus_id; /**< ID as exposed in the system */
124 unsigned int scl; /**< i2c SCL */
125 unsigned int sda; /**< i2c SDA */
130 * A Structure representing the physical properties of a spi bus.
134 unsigned int bus_id; /**< The Bus ID as exposed to the system. */
135 unsigned int slave_s; /**< Slave select */
136 mraa_boolean_t three_wire; /**< Is the bus only a three wire system */
137 unsigned int sclk; /**< Serial Clock */
138 unsigned int mosi; /**< Master Out, Slave In. */
139 unsigned int miso; /**< Master In, Slave Out. */
140 unsigned int cs; /**< Chip Select, used when the board is a spi slave */
145 * A Structure representing a uart device.
149 unsigned int index; /**< ID as exposed in the system */
150 int rx; /**< uart rx */
151 int tx; /**< uart tx */
152 const char* device_path; /**< To store "/dev/ttyS1" for example */
157 * A Structure representing a platform/board.
161 unsigned int phy_pin_count; /**< The Total IO pins on board */
162 unsigned int gpio_count; /**< GPIO Count */
163 unsigned int aio_count; /**< Analog side Count */
164 unsigned int i2c_bus_count; /**< Usable i2c Count */
165 mraa_i2c_bus_t i2c_bus[12]; /**< Array of i2c */
166 unsigned int def_i2c_bus; /**< Position in array of default i2c bus */
167 unsigned int spi_bus_count; /**< Usable spi Count */
168 mraa_spi_bus_t spi_bus[12]; /**< Array of spi */
169 unsigned int def_spi_bus; /**< Position in array of defult spi bus */
170 unsigned int adc_raw; /**< ADC raw bit value */
171 unsigned int adc_supported; /**< ADC supported bit value */
172 unsigned int def_uart_dev; /**< Position in array of defult uart */
173 unsigned int uart_dev_count; /**< Usable spi Count */
174 mraa_uart_dev_t uart_dev[6]; /**< Array of UARTs */
175 int pwm_default_period; /**< The default PWM period is US */
176 int pwm_max_period; /**< Maximum period in us */
177 int pwm_min_period; /**< Minimum period in us */
178 unsigned int platform_name_length; /**< Platform Name length */
179 char* platform_name; /**< Platform Name pointer */
180 mraa_pininfo_t* pins; /**< Pointer to pin array */
187 * Detects running platform and attempts to use included pinmap
189 * @return Result of operation
191 #if (defined SWIGPYTHON) || (defined SWIG)
192 mraa_result_t mraa_init();
194 // this sets a compiler attribute (supported by GCC & clang) to have mraa_init()
195 // be called as a constructor make sure your libc supports this! uclibc needs
196 // to be compiled with UCLIBC_CTOR_DTOR
197 mraa_result_t mraa_init() __attribute__((constructor));
203 * This is not a strict requirement but useful to test memory leaks and for
204 * people who like super clean code. If dynamically loading & unloading
205 * libmraa you need to call this before unloading the library.
210 * Checks if a pin is able to use the passed in mode.
212 * @param pin Physical Pin to be checked.
213 * @param mode the mode to be tested.
214 * @return boolean if the mode is supported, 0=false.
216 mraa_boolean_t mraa_pin_mode_test(int pin, mraa_pinmodes_t mode);
219 * Check the board's bit size when reading the value
221 * @return raw bits being read from kernel module. zero if no ADC
223 unsigned int mraa_adc_raw_bits();
226 * Return value that the raw value should be shifted to. Zero if no ADC
228 * @return return actual bit size the adc value should be understood as.
230 unsigned int mraa_adc_supported_bits();
233 * Sets the log level to use from 0-7 where 7 is very verbose. These are the
234 * syslog log levels, see syslog(3) for more information on the levels.
236 * @return Result of operation
238 mraa_result_t mraa_set_log_level(int level);
241 * Return the Platform's Name, If no platform detected return "Unknown"
243 * @return platform name
245 char* mraa_get_platform_name();
248 * This function attempts to set the mraa process to a given priority and the
249 * scheduler to SCHED_RR. Highest * priority is typically 99 and minimum is 0.
250 * This function * will set to MAX if * priority is > MAX. Function will return
253 * @param priority Value from typically 0 to 99
254 * @return The priority value set
256 int mraa_set_priority(const unsigned int priority);
258 /** Get the version string of mraa autogenerated from git tag
260 * The version returned may not be what is expected however it is a reliable
261 * number associated with the git tag closest to that version at build time
263 * @return version string from version.h
265 const char* mraa_get_version();
268 * Print a textual representation of the mraa_result_t
270 * @param result the result to print
272 void mraa_result_print(mraa_result_t result);
275 * Get platform type, board must be initialised.
277 * @return mraa_platform_t Platform type enum
279 mraa_platform_t mraa_get_platform_type();