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gpio: Add gpio chardev interface

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Signed-off-by: Mihai Stefanescu <mihai.t.gh.stefanescu@gmail.com>
Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>
This commit is contained in:
Mihai Stefanescu
2017-08-27 19:10:17 +02:00
committed by Brendan Le Foll
parent aa7006cce9
commit 1665e09928
4 changed files with 1477 additions and 237 deletions
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22
api/mraa/gpio.h
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@@ -61,7 +61,10 @@ typedef enum {
MRAA_GPIO_STRONG = 0, /**< Default. Strong high and low */
MRAA_GPIO_PULLUP = 1, /**< Resistive High */
MRAA_GPIO_PULLDOWN = 2, /**< Resistive Low */
MRAA_GPIO_HIZ = 3 /**< High Z State */
MRAA_GPIO_HIZ = 3, /**< High Z State */
MRAA_GPIOD_ACTIVE_LOW = 4,
MRAA_GPIOD_OPEN_DRAIN = 5,
MRAA_GPIOD_OPEN_SOURCE = 6,
} mraa_gpio_mode_t;
/**
@@ -109,6 +112,8 @@ typedef enum {
*/
mraa_gpio_context mraa_gpio_init(int pin);
mraa_gpio_context mraa_gpio_init_multiple(int pins[], int num_pins);
/**
* Initialise gpio context without any mapping to a pin
*
@@ -126,6 +131,8 @@ mraa_gpio_context mraa_gpio_init_raw(int gpiopin);
*/
mraa_result_t mraa_gpio_edge_mode(mraa_gpio_context dev, mraa_gpio_edge_t mode);
mraa_result_t mraa_gpio_edge_mode_multiple(mraa_gpio_context dev, mraa_gpio_edge_t mode);
/**
* Set an interrupt on pin
*
@@ -138,6 +145,8 @@ mraa_result_t mraa_gpio_edge_mode(mraa_gpio_context dev, mraa_gpio_edge_t mode);
*/
mraa_result_t mraa_gpio_isr(mraa_gpio_context dev, mraa_gpio_edge_t edge, void (*fptr)(void*), void* args);
mraa_result_t mraa_gpio_isr_multiple(mraa_gpio_context dev, mraa_gpio_edge_t edge, void (*fptr)(void*), void* args);
/**
* Stop the current interrupt watcher on this Gpio, and set the Gpio edge mode
* to MRAA_GPIO_EDGE_NONE
@@ -165,6 +174,8 @@ mraa_result_t mraa_gpio_mode(mraa_gpio_context dev, mraa_gpio_mode_t mode);
*/
mraa_result_t mraa_gpio_dir(mraa_gpio_context dev, mraa_gpio_dir_t dir);
mraa_result_t mraa_gpio_dir_multiple(mraa_gpio_context dev, mraa_gpio_dir_t dir);
/**
* Read Gpio direction
*
@@ -183,6 +194,8 @@ mraa_result_t mraa_gpio_read_dir(mraa_gpio_context dev, mraa_gpio_dir_t *dir);
*/
mraa_result_t mraa_gpio_close(mraa_gpio_context dev);
mraa_result_t mraa_gpio_close_multiple(mraa_gpio_context dev);
/**
* Read the Gpio value. This can be 0 or 1. A resonse of -1 means that there
* was a fatal error.
@@ -192,6 +205,11 @@ mraa_result_t mraa_gpio_close(mraa_gpio_context dev);
*/
int mraa_gpio_read(mraa_gpio_context dev);
/* Values array is provided by user. Must be the same size as the array passed in init.
* It will be overwritten with the read results.
*/
mraa_result_t mraa_gpio_read_multiple(mraa_gpio_context dev, int output_values[]);
/**
* Write to the Gpio Value.
*
@@ -201,6 +219,8 @@ int mraa_gpio_read(mraa_gpio_context dev);
*/
mraa_result_t mraa_gpio_write(mraa_gpio_context dev, int value);
mraa_result_t mraa_gpio_write_multiple(mraa_gpio_context dev, int input_values[]);
/**
* Change ownership of the context.
*