pihwm  r1
A lightweight C library for Raspberry Pi hardware modules.
pi_pwm.c File Reference

Pulse width modulation library function implementation. More...

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <dirent.h>
#include <fcntl.h>
#include <assert.h>
#include <sys/mman.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <unistd.h>
#include "pihwm.h"

Go to the source code of this file.

Functions

int pwm_init ()
 Initialises the PWM peripheral. More...
 
void pwm_mode (unsigned int mode)
 Sets mode for the PWM peripheral. More...
 
void pwm_value (unsigned int value)
 Sets PWM value. More...
 
void pwm_release ()
 Releases the PWM peripheral and unmaps the memory. More...
 

Variables

volatile unsigned int * gpio
 
volatile unsigned int * pwm
 
volatile unsigned int * clk
 

Detailed Description

Pulse width modulation library function implementation.

Author
Omer Kilic omerk.nosp@m.ilic.nosp@m.@gmai.nosp@m.l.co.nosp@m.m - Erlang Solutions
Jeremy Bennett jerem.nosp@m.y.be.nosp@m.nnett.nosp@m.@emb.nosp@m.ecosm.nosp@m..com - Embecosm Limited

LICENSE

Copyright (C) 2013 Omer Kilic omerk.nosp@m.ilic.nosp@m.@gmai.nosp@m.l.co.nosp@m.m - Erlang Solutions Copyright (C) 2013 Jeremy Bennett jerem.nosp@m.y.be.nosp@m.nnett.nosp@m.@emb.nosp@m.ecosm.nosp@m..com - Embecosm Limited

This file is part of pihwm http://omerk.github.io/pihwm

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at:

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

Definition in file pi_pwm.c.