Raspberries/mraa
Private
Public Access
2
0
Fork 0
Code Activity

gpio: chardev interface / multiple gpio support for sysfs

Browse Source 
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:
mihais
2017-09-23 17:13:06 +03:00
committed by Brendan Le Foll
parent fbc2ad6045
commit 2b98fc7869
7 changed files with 887 additions and 764 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
include/gpio/gpio_chardev.h
View File

@@ -29,6 +29,7 @@ extern "C" {
#endif
#include "mraa_internal.h"
#include "linux/gpio.h"
typedef struct {
int chip_fd;
@@ -38,6 +39,8 @@ typedef struct {
typedef struct gpioline_info mraa_gpiod_line_info;
void _mraa_free_gpio_groups(mraa_gpio_context dev);
void _mraa_close_gpio_event_handles(mraa_gpio_context dev);
void _mraa_close_gpio_desc(mraa_gpio_context dev);
int _mraa_gpiod_ioctl(int fd, unsigned long gpio_request, void* data);
mraa_gpiod_chip_info* mraa_get_chip_info_by_path(const char* path);
@@ -45,6 +48,7 @@ mraa_gpiod_chip_info* mraa_get_chip_info_by_name(const char* name);
mraa_gpiod_chip_info* mraa_get_chip_info_by_label(const char* label);
mraa_gpiod_chip_info* mraa_get_chip_info_by_number(unsigned number);
mraa_gpiod_line_info* mraa_get_line_info_from_descriptor(int chip_fd, unsigned line_number);
mraa_gpiod_line_info* mraa_get_line_info_by_chip_number(unsigned chip_number, unsigned line_number);
mraa_gpiod_line_info* mraa_get_line_info_by_chip_name(const char* chip_name, unsigned line_number);
mraa_gpiod_line_info* mraa_get_line_info_by_chip_label(const char* chip_label, unsigned line_number);
@@ -52,8 +56,14 @@ mraa_gpiod_line_info* mraa_get_line_info_by_chip_label(const char* chip_label, u
int mraa_get_lines_handle(int chip_fd, unsigned line_offsets[], unsigned num_lines, unsigned flags, unsigned default_value);
int mraa_set_line_values(int line_handle, unsigned int num_lines, unsigned char input_values[]);
int mraa_get_line_values(int line_handle, unsigned int num_lines, unsigned char output_values[]);
int mraa_get_number_of_gpio_chips();
mraa_boolean_t mraa_is_gpio_line_kernel_owned(mraa_gpiod_line_info *linfo);
mraa_boolean_t mraa_is_gpio_line_dir_out(mraa_gpiod_line_info *linfo);
mraa_boolean_t mraa_is_gpio_line_active_low(mraa_gpiod_line_info *linfo);
mraa_boolean_t mraa_is_gpio_line_open_drain(mraa_gpiod_line_info *linfo);
mraa_boolean_t mraa_is_gpio_line_open_source(mraa_gpiod_line_info *linfo);
int mraa_get_number_of_gpio_chips();
/* Multiple gpio support. */
typedef struct _gpio_group* mraa_gpiod_group_t;

12
include/mraa_internal_types.h
View File

@@ -155,18 +155,12 @@ struct _gpio {
AGpio *bgpio;
#endif
/* TODO: The below members should be integrated in gpio_group struct. */
int dev_fd;
int gpiod_handle;
unsigned int gpio_chip;
unsigned int gpio_line;
/* Multiple gpio support. These members are treated separately for now until multiple gpio support is accepted. */
unsigned int num_chips;
struct _gpio_group *gpio_group;
/* Pin index passed by the user to gpio_group structures. */
unsigned int num_chips;
int *pin_to_gpio_table;
unsigned int num_pins;
mraa_gpio_events_t events;
int *provided_pins;
struct _gpio *next;
};