wiringPi.c File Reference

#include <stdio.h>
#include <stdarg.h>
#include <stdint.h>
#include <stdlib.h>
#include <ctype.h>
#include <poll.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <time.h>
#include <fcntl.h>
#include <pthread.h>
#include <sys/time.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <sys/ioctl.h>
#include <asm/ioctl.h>
#include "softPwm.h"
#include "softTone.h"
#include "wiringPi.h"
#include "../version.h"

Macros
#define	ENV_DEBUG   "WIRINGPI_DEBUG"
#define	ENV_CODES   "WIRINGPI_CODES"
#define	ENV_GPIOMEM   "WIRINGPI_GPIOMEM"
#define	BCM_PASSWORD   0x5A000000
#define	FSEL_INPT   0b000
#define	FSEL_OUTP   0b001
#define	FSEL_ALT0   0b100
#define	FSEL_ALT1   0b101
#define	FSEL_ALT2   0b110
#define	FSEL_ALT3   0b111
#define	FSEL_ALT4   0b011
#define	FSEL_ALT5   0b010
#define	PAGE_SIZE   (4*1024)
#define	BLOCK_SIZE   (4*1024)
#define	PWM_CONTROL   0
#define	PWM_STATUS   1
#define	PWM0_RANGE   4
#define	PWM0_DATA   5
#define	PWM1_RANGE   8
#define	PWM1_DATA   9
#define	PWMCLK_CNTL   40
#define	PWMCLK_DIV   41
#define	PWM0_MS_MODE   0x0080
#define	PWM0_USEFIFO   0x0020
#define	PWM0_REVPOLAR   0x0010
#define	PWM0_OFFSTATE   0x0008
#define	PWM0_REPEATFF   0x0004
#define	PWM0_SERIAL   0x0002
#define	PWM0_ENABLE   0x0001
#define	PWM1_MS_MODE   0x8000
#define	PWM1_USEFIFO   0x2000
#define	PWM1_REVPOLAR   0x1000
#define	PWM1_OFFSTATE   0x0800
#define	PWM1_REPEATFF   0x0400
#define	PWM1_SERIAL   0x0200
#define	PWM1_ENABLE   0x0100
#define	TIMER_LOAD   (0x400 >> 2)
#define	TIMER_VALUE   (0x404 >> 2)
#define	TIMER_CONTROL   (0x408 >> 2)
#define	TIMER_IRQ_CLR   (0x40C >> 2)
#define	TIMER_IRQ_RAW   (0x410 >> 2)
#define	TIMER_IRQ_MASK   (0x414 >> 2)
#define	TIMER_RELOAD   (0x418 >> 2)
#define	TIMER_PRE_DIV   (0x41C >> 2)
#define	TIMER_COUNTER   (0x420 >> 2)
#define	GPIO_PERI_BASE_OLD   0x20000000
#define	GPIO_PERI_BASE_NEW   0x3F000000
#define	GPPUD   37
#define	GPIO_CLOCK_SOURCE   1

Functions
int	wiringPiFailure (int fatal, const char *message,...)
int	piGpioLayout (void)
int	piBoardRev (void)
void	piBoardId (int *model, int *rev, int *mem, int *maker, int *warranty)
int	wpiPinToGpio (int wpiPin)
int	physPinToGpio (int physPin)
void	setPadDrive (int group, int value)
int	getAlt (int pin)
void	pwmSetMode (int mode)
void	pwmSetRange (unsigned int range)
void	pwmSetClock (int divisor)
void	gpioClockSet (int pin, int freq)
struct wiringPiNodeStruct *	wiringPiFindNode (int pin)
struct wiringPiNodeStruct *	wiringPiNewNode (int pinBase, int numPins)
void	pinModeAlt (int pin, int mode)
void	pinMode (int pin, int mode)
void	pullUpDnControl (int pin, int pud)
int	digitalRead (int pin)
void	digitalWrite (int pin, int value)
void	pwmWrite (int pin, int value)
int	analogRead (int pin)
void	analogWrite (int pin, int value)
void	pwmToneWrite (int pin, int freq)
void	digitalWriteByte (const int value)
unsigned int	digitalReadByte (void)
void	digitalWriteByte2 (const int value)
unsigned int	digitalReadByte2 (void)
int	waitForInterrupt (int pin, int mS)
int	wiringPiISR (int pin, int mode, void(*function)(void))
void	delay (unsigned int howLong)
void	delayMicrosecondsHard (unsigned int howLong)
void	delayMicroseconds (unsigned int howLong)
unsigned int	millis (void)
unsigned int	micros (void)
void	wiringPiVersion (int *major, int *minor)
int	wiringPiSetup (void)
int	wiringPiSetupGpio (void)
int	wiringPiSetupPhys (void)
int	wiringPiSetupSys (void)

Variables
struct wiringPiNodeStruct *	wiringPiNodes = NULL
volatile unsigned int *	_wiringPiGpio
volatile unsigned int *	_wiringPiPwm
volatile unsigned int *	_wiringPiClk
volatile unsigned int *	_wiringPiPads
volatile unsigned int *	_wiringPiTimer
volatile unsigned int *	_wiringPiTimerIrqRaw
const char *	piModelNames [20]
const char *	piRevisionNames [16]
const char *	piMakerNames [16]
const int	piMemorySize [8]
int	wiringPiDebug = FALSE
int	wiringPiReturnCodes = FALSE
int	wiringPiTryGpioMem = FALSE

Macro Definition Documentation

#define BCM_PASSWORD   0x5A000000

#define BLOCK_SIZE   (4*1024)

#define ENV_CODES   "WIRINGPI_CODES"

#define ENV_DEBUG   "WIRINGPI_DEBUG"

#define ENV_GPIOMEM   "WIRINGPI_GPIOMEM"

#define FSEL_ALT0   0b100

#define FSEL_ALT1   0b101

#define FSEL_ALT2   0b110

#define FSEL_ALT3   0b111

#define FSEL_ALT4   0b011

#define FSEL_ALT5   0b010

#define FSEL_INPT   0b000

#define FSEL_OUTP   0b001

#define GPIO_CLOCK_SOURCE   1

#define GPIO_PERI_BASE_NEW   0x3F000000

#define GPIO_PERI_BASE_OLD   0x20000000

#define GPPUD   37

#define PAGE_SIZE   (4*1024)

#define PWM0_DATA   5

#define PWM0_ENABLE   0x0001

#define PWM0_MS_MODE   0x0080

#define PWM0_OFFSTATE   0x0008

#define PWM0_RANGE   4

#define PWM0_REPEATFF   0x0004

#define PWM0_REVPOLAR   0x0010

#define PWM0_SERIAL   0x0002

#define PWM0_USEFIFO   0x0020

#define PWM1_DATA   9

#define PWM1_ENABLE   0x0100

#define PWM1_MS_MODE   0x8000

#define PWM1_OFFSTATE   0x0800

#define PWM1_RANGE   8

#define PWM1_REPEATFF   0x0400

#define PWM1_REVPOLAR   0x1000

#define PWM1_SERIAL   0x0200

#define PWM1_USEFIFO   0x2000

#define PWM_CONTROL   0

#define PWM_STATUS   1

#define PWMCLK_CNTL   40

#define PWMCLK_DIV   41

#define TIMER_CONTROL   (0x408 >> 2)

#define TIMER_COUNTER   (0x420 >> 2)

#define TIMER_IRQ_CLR   (0x40C >> 2)

#define TIMER_IRQ_MASK   (0x414 >> 2)

#define TIMER_IRQ_RAW   (0x410 >> 2)

#define TIMER_LOAD   (0x400 >> 2)

#define TIMER_PRE_DIV   (0x41C >> 2)

#define TIMER_RELOAD   (0x418 >> 2)

#define TIMER_VALUE   (0x404 >> 2)

Function Documentation

int analogRead

(

int

pin

)

void analogWrite	(	int	pin,
		int	value
	)

void delay

(

unsigned int

howLong

)

void delayMicroseconds

(

unsigned int

howLong

)

void delayMicrosecondsHard

(

unsigned int

howLong

)

int digitalRead

(

int

pin

)

unsigned int digitalReadByte

(

void

)

unsigned int digitalReadByte2

(

void

)

void digitalWrite	(	int	pin,
		int	value
	)

void digitalWriteByte

(

const int

value

)

void digitalWriteByte2

(

const int

value

)

int getAlt

(

int

pin

)

void gpioClockSet	(	int	pin,
		int	freq
	)

unsigned int micros

(

void

)

unsigned int millis

(

void

)

int physPinToGpio

(

int

physPin

)

void piBoardId	(	int *	model,
		int *	rev,
		int *	mem,
		int *	maker,
		int *	warranty
	)

int piBoardRev

(

void

)

int piGpioLayout

(

void

)

void pinMode	(	int	pin,
		int	mode
	)

void pinModeAlt	(	int	pin,
		int	mode
	)

void pullUpDnControl	(	int	pin,
		int	pud
	)

void pwmSetClock

(

int

divisor

)

void pwmSetMode

(

int

mode

)

void pwmSetRange

(

unsigned int

range

)

void pwmToneWrite	(	int	pin,
		int	freq
	)

void pwmWrite	(	int	pin,
		int	value
	)

void setPadDrive	(	int	group,
		int	value
	)

int waitForInterrupt	(	int	pin,
		int	mS
	)

int wiringPiFailure	(	int	fatal,
		const char *	message,
			...
	)

struct wiringPiNodeStruct* wiringPiFindNode

(

int

pin

)

int wiringPiISR	(	int	pin,
		int	mode,
		void(*)(void)	function
	)

struct wiringPiNodeStruct* wiringPiNewNode	(	int	pinBase,
		int	numPins
	)

int wiringPiSetup

(

void

)

int wiringPiSetupGpio

(

void

)

int wiringPiSetupPhys

(

void

)

int wiringPiSetupSys

(

void

)

void wiringPiVersion	(	int *	major,
		int *	minor
	)

int wpiPinToGpio

(

int

wpiPin

)

Variable Documentation

volatile unsigned int* _wiringPiClk

volatile unsigned int* _wiringPiGpio

volatile unsigned int* _wiringPiPads

volatile unsigned int* _wiringPiPwm

volatile unsigned int* _wiringPiTimer

volatile unsigned int* _wiringPiTimerIrqRaw

const char* piMakerNames[16]

Initial value:

=
{
  "Sony",   
  "Egoman", 
  "Embest", 
  "Unknown",    
  "Embest", 
  "Unknown05",  
  "Unknown06",  
  "Unknown07",  
  "Unknown08",  
  "Unknown09",  
  "Unknown10",  
  "Unknown11",  
  "Unknown12",  
  "Unknown13",  
  "Unknown14",  
  "Unknown15",  
}

const int piMemorySize[8]

Initial value:

=
{
   256,     
   512,     
  1024,     
     0,     
     0,     
     0,     
     0,     
     0,     
}

const char* piModelNames[20]

Initial value:

=
{
  "Model A",    
  "Model B",    
  "Model A+",   
  "Model B+",   
  "Pi 2",   
  "Alpha",  
  "CM",     
  "Unknown07",  
  "Pi 3",   
  "Pi Zero",    
  "CM3",    
  "Unknown11",  
  "Pi Zero-W",  
  "Pi 3B+", 
  "Pi 3A+", 
  "Unknown15",  
  "CM3+",   
  "Unknown17",  
  "Unknown18",  
  "Unknown19",  
}

const char* piRevisionNames[16]

Initial value:

=
{
  "00",
  "01",
  "02",
  "03",
  "04",
  "05",
  "06",
  "07",
  "08",
  "09",
  "10",
  "11",
  "12",
  "13",
  "14",
  "15",
}

int wiringPiDebug = FALSE

struct wiringPiNodeStruct* wiringPiNodes = NULL

int wiringPiReturnCodes = FALSE

int wiringPiTryGpioMem = FALSE