gpio.c File Reference

#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <sys/mman.h>
#include <time.h>
#include <pthread.h>
#include "gpio.h"
#include "cpuinfo.h"

Go to the source code of this file.

Classes
struct	tspair

Macros
#define	BCM2708_PERI_BASE   0x20000000
#define	BCM2708_GPIO_BASE   (BCM2708_PERI_BASE + 0x200000)
#define	BCM2709_PERI_BASE   0x3F000000
#define	BCM2709_GPIO_BASE   (BCM2709_PERI_BASE + 0x200000)
#define	FSEL_OFFSET   0
#define	SET_OFFSET   7
#define	CLR_OFFSET   10
#define	PINLEVEL_OFFSET   13
#define	EVENT_DETECT_OFFSET   16
#define	RISING_ED_OFFSET   19
#define	FALLING_ED_OFFSET   22
#define	HIGH_DETECT_OFFSET   25
#define	LOW_DETECT_OFFSET   28
#define	PULLUPDN_OFFSET   37
#define	PULLUPDNCLK_OFFSET   38
#define	PAGE_SIZE   (4*1024)
#define	BLOCK_SIZE   (4*1024)

Functions
void	short_wait (void)
int	setup (void)
void	set_pullupdn (int gpio, int pud)
void	set_function (int gpio, int function, int pud)
int	get_function (int gpio)
int	input (int gpio)
void	output (int gpio, int value)
void	outputSequence (int gpio, int period, char *sequence)
void	resetPWM (int gpio)
void	pulseTS (int gpio, struct timespec *up, struct timespec *down)
void	pulseOrSaveTS (int gpio, struct timespec *up, struct timespec *down)
void	pulseMilli (int gpio, int up, int down)
void	pulseMilliRatio (int gpio, int width, float ratio)
void	pulseMicro (int gpio, int up, int down)
void	pulseMicroRatio (int gpio, int width, float ratio)
void	pulseAngle (int gpio, float angle)
void	pulseRatio (int gpio, float ratio)
struct pulse *	getPulse (int gpio)
void *	pwmLoop (void *data)
void	enablePWM (int gpio)
void	disablePWM (int gpio)
int	isPWMEnabled (int gpio)
void	cleanup (void)
int	number_of_cores (void)

Variables
static volatile uint32_t *	gpio_map
static struct pulse	gpio_pulses [GPIO_COUNT]
static struct tspair	gpio_tspairs [GPIO_COUNT]
static pthread_t *	gpio_threads [GPIO_COUNT]

Macro Definition Documentation

#define BCM2708_GPIO_BASE   (BCM2708_PERI_BASE + 0x200000)

Definition at line 35 of file gpio.c.

Referenced by setup().

#define BCM2708_PERI_BASE   0x20000000

Definition at line 34 of file gpio.c.

#define BCM2709_GPIO_BASE   (BCM2709_PERI_BASE + 0x200000)

Definition at line 37 of file gpio.c.

Referenced by setup().

#define BCM2709_PERI_BASE   0x3F000000

Definition at line 36 of file gpio.c.

#define BLOCK_SIZE   (4*1024)

Definition at line 51 of file gpio.c.

Referenced by cleanup(), and setup().

#define CLR_OFFSET   10

Definition at line 40 of file gpio.c.

Referenced by output().

#define EVENT_DETECT_OFFSET   16

Definition at line 42 of file gpio.c.

#define FALLING_ED_OFFSET   22

Definition at line 44 of file gpio.c.

#define FSEL_OFFSET   0

Definition at line 38 of file gpio.c.

Referenced by get_function(), and set_function().

#define HIGH_DETECT_OFFSET   25

Definition at line 45 of file gpio.c.

#define LOW_DETECT_OFFSET   28

Definition at line 46 of file gpio.c.

#define PAGE_SIZE   (4*1024)

Definition at line 50 of file gpio.c.

Referenced by setup().

#define PINLEVEL_OFFSET   13

Definition at line 41 of file gpio.c.

Referenced by input().

#define PULLUPDN_OFFSET   37

Definition at line 47 of file gpio.c.

Referenced by set_pullupdn().

#define PULLUPDNCLK_OFFSET   38

Definition at line 48 of file gpio.c.

Referenced by set_pullupdn().

#define RISING_ED_OFFSET   19

Definition at line 43 of file gpio.c.

#define SET_OFFSET   7

Definition at line 39 of file gpio.c.

Referenced by output().

Function Documentation

void cleanup

(

void

)

Definition at line 332 of file gpio.c.

References BLOCK_SIZE, and gpio_map.

Referenced by initGPIO().

void disablePWM

(

int

gpio

)

Definition at line 314 of file gpio.c.

References webiopi-client::gpio, gpio_threads, output(), and resetPWM().

Referenced by py_disablePWM(), and set_function().

void enablePWM

(

int

gpio

)

Definition at line 300 of file gpio.c.

References webiopi-client::gpio, gpio_threads, pwmLoop(), and resetPWM().

Referenced by py_enablePWM(), and set_function().

int get_function

(

int

gpio

)

Definition at line 139 of file gpio.c.

References FSEL_OFFSET, gpio_map, isPWMEnabled(), OUT, PWM, and webiopi-client::value.

Referenced by py_get_function(), py_get_function_string(), py_output(), py_output_sequence(), py_pulseAngle(), py_pulseMicro(), py_pulseMicroRatio(), py_pulseMilli(), py_pulseMilliRatio(), and py_pulseRatio().

struct pulse* getPulse

(

int

gpio

)

Definition at line 286 of file gpio.c.

References webiopi-client::gpio, and gpio_pulses.

Referenced by py_getPulse().

int input

(

int

gpio

)

Definition at line 153 of file gpio.c.

References gpio_map, PINLEVEL_OFFSET, and webiopi-client::value.

Referenced by py_input().

int isPWMEnabled

(

int

gpio

)

Definition at line 327 of file gpio.c.

References webiopi-client::gpio, and gpio_threads.

Referenced by get_function(), and py_isPWMEnabled().

int number_of_cores

(

void

)

Definition at line 338 of file gpio.c.

Referenced by setup().

void output	(	int	gpio,
		int	value
	)

Definition at line 163 of file gpio.c.

References CLR_OFFSET, gpio_map, and SET_OFFSET.

Referenced by disablePWM(), outputSequence(), pulseTS(), and py_output().

void outputSequence	(	int	gpio,
		int	period,
		char *	sequence
	)

Definition at line 178 of file gpio.c.

References output(), and webiopi-client::value.

Referenced by py_output_sequence().

void pulseAngle	(	int	gpio,
		float	angle
	)

Definition at line 269 of file gpio.c.

References ANGLE, webiopi-client::gpio, gpio_pulses, pulseMicro(), pulse::type, and pulse::value.

Referenced by py_pulseAngle().

void pulseMicro	(	int	gpio,
		int	up,
		int	down
	)

Definition at line 250 of file gpio.c.

References pulseOrSaveTS().

Referenced by pulseAngle(), pulseMicroRatio(), pulseRatio(), and py_pulseMicro().

void pulseMicroRatio	(	int	gpio,
		int	width,
		float	ratio
	)

Definition at line 262 of file gpio.c.

References pulseMicro().

Referenced by py_pulseMicroRatio().

void pulseMilli	(	int	gpio,
		int	up,
		int	down
	)

Definition at line 231 of file gpio.c.

References pulseOrSaveTS().

Referenced by pulseMilliRatio(), and py_pulseMilli().

void pulseMilliRatio	(	int	gpio,
		int	width,
		float	ratio
	)

Definition at line 243 of file gpio.c.

References pulseMilli().

Referenced by py_pulseMilliRatio().

void pulseOrSaveTS	(	int	gpio,
		struct timespec *	up,
		struct timespec *	down
	)

Definition at line 220 of file gpio.c.

References gpio_threads, gpio_tspairs, and pulseTS().

Referenced by pulseMicro(), and pulseMilli().

void pulseRatio	(	int	gpio,
		float	ratio
	)

Definition at line 278 of file gpio.c.

References webiopi-client::gpio, gpio_pulses, pulseMicro(), RATIO, pulse::type, and pulse::value.

Referenced by py_pulse(), and py_pulseRatio().

void pulseTS	(	int	gpio,
		struct timespec *	up,
		struct timespec *	down
	)

Definition at line 207 of file gpio.c.

References output().

Referenced by pulseOrSaveTS(), and pwmLoop().

void* pwmLoop

(

void *

data

)

Definition at line 291 of file gpio.c.

References webiopi-client::gpio, gpio_tspairs, and pulseTS().

Referenced by enablePWM().

void resetPWM

(

int

gpio

)

Definition at line 196 of file gpio.c.

References tspair::down, webiopi-client::gpio, gpio_pulses, gpio_tspairs, pulse::type, tspair::up, and pulse::value.

Referenced by disablePWM(), and enablePWM().

void set_function	(	int	gpio,
		int	function,
		int	pud
	)

Definition at line 121 of file gpio.c.

References disablePWM(), enablePWM(), FSEL_OFFSET, gpio_map, OUT, PWM, and set_pullupdn().

Referenced by py_set_function().

void set_pullupdn	(	int	gpio,
		int	pud
	)

Definition at line 101 of file gpio.c.

References gpio_map, PUD_DOWN, PUD_UP, PULLUPDN_OFFSET, PULLUPDNCLK_OFFSET, and short_wait().

Referenced by set_function().

int setup

(

void

)

Definition at line 74 of file gpio.c.

References BCM2708_GPIO_BASE, BCM2709_GPIO_BASE, BLOCK_SIZE, get_rpi_revision(), gpio_map, number_of_cores(), PAGE_SIZE, cambot::set_speed(), cambot::setup(), SETUP_DEVMEM_FAIL, SETUP_MALLOC_FAIL, SETUP_MMAP_FAIL, SETUP_OK, and cambot::stop().

void short_wait

(

void

)

Definition at line 64 of file gpio.c.

Referenced by set_pullupdn().

Variable Documentation

volatile uint32_t* gpio_map

static

Definition at line 53 of file gpio.c.

Referenced by cleanup(), get_function(), input(), output(), set_function(), set_pullupdn(), and setup().

struct pulse gpio_pulses[GPIO_COUNT]

static

Definition at line 60 of file gpio.c.

Referenced by getPulse(), pulseAngle(), pulseRatio(), and resetPWM().

pthread_t* gpio_threads[GPIO_COUNT]

static

Definition at line 62 of file gpio.c.

Referenced by disablePWM(), enablePWM(), isPWMEnabled(), and pulseOrSaveTS().

struct tspair gpio_tspairs[GPIO_COUNT]

static

Definition at line 61 of file gpio.c.

Referenced by pulseOrSaveTS(), pwmLoop(), and resetPWM().