gpio.h File Reference

Contains defines for gpio.c. More...

#include "rpiGpio.h"
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <sys/mman.h>
#include <unistd.h>
#include <errno.h>
#include <stdio.h>
#include <time.h>

Go to the source code of this file.

Macros
#define	GPIO_MAP_SIZE   (GPPUDCLK1_OFFSET)
#define	NUMBER_GPIO   17
#define	RESISTOR_SLEEP_US   1
#define	GPIO_GPSET0   *(gGpioMap + GPSET0_OFFSET / sizeof(uint32_t))
	GPSET_0 register.
#define	GPIO_GPCLR0   *(gGpioMap + GPCLR0_OFFSET / sizeof(uint32_t))
	GPIO_GPCLR0 register.
#define	GPIO_GPLEV0   *(gGpioMap + GPLEV0_OFFSET / sizeof(uint32_t))
	GPIO_GPLEV0 register.
#define	GPIO_GPPUD   *(gGpioMap + GPPUD_OFFSET / sizeof(uint32_t))
	GPIO_GPPUD register.
#define	GPIO_GPPUDCLK0   *(gGpioMap + GPPUDCLK0_OFFSET / sizeof(uint32_t))
	GPIO_GPPUDCLK0 register.

Detailed Description

Contains defines for gpio.c.

This is is part of https://github.com/alanbarr/RaspberryPi-GPIO a C library for basic control of the Raspberry Pi's GPIO pins. Copyright (C) Alan Barr 2012

This code was loosely based on the example code provided by Dom and Gert found at: http://elinux.org/RPi_Low-level_peripherals

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/.

Definition in file gpio.h.

Macro Definition Documentation

GPIO_MAP_SIZE

#define GPIO_MAP_SIZE   (GPPUDCLK1_OFFSET)

The size the GPIO mapping is required to be. GPPUDCLK1_OFFSET is the last register offset of interest.

Definition at line 44 of file gpio.h.

NUMBER_GPIO

#define NUMBER_GPIO   17

Number of GPIO pins which are available on the Raspberry Pi.

Definition at line 47 of file gpio.h.

RESISTOR_SLEEP_US

#define RESISTOR_SLEEP_US   1

Delay for changing pullup/pulldown resistors. It should be at least 150 cycles which is 0.6 uS (1 / 250 MHz * 150). (250 Mhz is the core clock)

Definition at line 51 of file gpio.h.