mirror of
https://github.com/fhem/fhem-mirror.git
synced 2025-03-04 05:16:45 +00:00
hardware access changed to ioctl and syswrite/read
SMBus module not needed anymore but still usable, see attribute useHWLib possibility to swap I2C-0 to P5 for Rev. B raspberries via attribute swap_i2c0 (not tested yet) git-svn-id: https://svn.fhem.de/fhem/trunk@6160 2b470e98-0d58-463d-a4d8-8e2adae1ed80
This commit is contained in:
klauswitt
parent
c91b674c8a
commit
e2a4aeb4dd
@ -5,7 +5,7 @@ package main;
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use strict;
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use warnings;
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use Time::HiRes qw(gettimeofday);
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use Device::SMBus;
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#use Device::SMBus;
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#my $clientsI2C = ":I2C_PC.*:I2C_SHT21:I2C_MCP23017:I2C_BMP180:";
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@ -20,16 +20,23 @@ I2C_TSL2561
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);
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my $gpioprg = "/usr/local/bin/gpio"; #WiringPi GPIO utility
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my $I2C_SLAVE = 0x0703; #Variable for IOCTL (set I2C slave address)
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#my %matchListI2C = ( #kann noch weg?
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# "1:I2C_PCF8574"=> ".*",
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# "2:FHT" => "^81..(04|09|0d)..(0909a001|83098301|c409c401)..",
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#);
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my $libcheck_SMBus = 1;
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my $check_ioctl_ph = 1;
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sub RPII2C_Initialize($) {
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my ($hash) = @_;
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eval "use Device::SMBus;";
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$libcheck_SMBus = 0 if($@);
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eval {require "sys/ioctl.ph"};
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$check_ioctl_ph = 0 if($@);
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# Provider
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$hash->{Clients} = join (':',@clients);
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#$hash->{WriteFn} = "RPII2C_Write"; #wird vom client per IOWrite($@) aufgerufen
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@ -40,39 +47,46 @@ sub RPII2C_Initialize($) {
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$hash->{UndefFn} = "RPII2C_Undef";
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$hash->{GetFn} = "RPII2C_Get";
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$hash->{SetFn} = "RPII2C_Set";
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#$hash->{AttrFn} = "RPII2C_Attr";
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$hash->{AttrFn} = "RPII2C_Attr";
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$hash->{NotifyFn} = "RPII2C_Notify";
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$hash->{AttrList}= "do_not_notify:1,0 ignore:1,0 showtime:1,0 " .
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"$readingFnAttributes";
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$hash->{AttrList} .= " useHWLib:IOCTL,SMBus " if( $libcheck_SMBus && $check_ioctl_ph);
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$hash->{AttrList} .= " swap_i2c0:off,on";
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}
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#####################################
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sub RPII2C_Define($$) { #
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my ($hash, $def) = @_;
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my @a = split("[ \t][ \t]*", $def);
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unless(@a == 3) {
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my $msg = "wrong syntax: define <name> RPII2C <0|1>";
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Log3 undef, 2, $msg;
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return $msg;
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}
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if(-e $gpioprg) { #I2C Devices fuer FHEM User lesbar machen
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if(-x $gpioprg) {
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if(-u $gpioprg) {
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my $exp = $gpioprg.' load i2c';
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$exp = `$exp`;
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} else {
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Log3 $hash, 1, "file $gpioprg is not setuid";
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}
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} else {
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Log3 $hash, 1, "file $gpioprg is not executable";
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}
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} else {
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Log3 $hash, 1, "file $gpioprg doesnt exist";
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} #system "/usr/local/bin/gpio load i2c";
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my $name = $a[0];
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$hash->{SMBus_exists} = $libcheck_SMBus if($libcheck_SMBus);
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$hash->{ioctl_ph_exists} = $check_ioctl_ph if($check_ioctl_ph);
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my $name = $a[0];
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my $dev = $a[2];
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if ($check_ioctl_ph) {
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$hash->{hwfn} = \&RPII2C_HWACCESS_ioctl;
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} elsif ($libcheck_SMBus) {
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$hash->{hwfn} = \&RPII2C_HWACCESS;
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} else {
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return $name . ": Error! no library for Hardware access installed";
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}
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my $device = "/dev/i2c-".$dev;
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unless ( RPII2C_CHECK_GPIO_DEVICE($dev) ) {
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Log3 $hash, 1, "file $device not accessible try to use gpio utility to fix it";
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if ( defined(my $ret = RPII2C_CHECK_GPIO_UTIL($gpioprg)) ) {
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Log3 $hash, 1, $ret if $ret;
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} else { #I2C Devices mit gpio utility fuer FHEM User lesbar machen
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my $exp = $gpioprg.' load i2c';
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$exp = `$exp`;
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}
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}
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$hash->{NOTIFYDEV} = "global";
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#$hash->{Clients} = $clientsI2C;
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@ -83,10 +97,8 @@ sub RPII2C_Define($$) { #
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$attr{$name}{dummy} = 1;
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return undef;
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}
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return $name . ': Error! I2C device not found: /dev/i2c-'.$dev . '. Please check kernelmodules must loaded: i2c_bcm2708, i2c_dev' unless -e "/dev/i2c-".$dev;
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return $name . ': Error! I2C device not readable: /dev/i2c-'.$dev . '. Please install wiringpi or change access rights for fhem user' unless -r "/dev/i2c-".$dev;
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return $name . ': Error! I2C device not writable: /dev/i2c-'.$dev . '. Please install wiringpi or change access rights for fhem user' unless -w "/dev/i2c-".$dev;
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my $check = RPII2C_CHECK_GPIO_DEVICE($dev);
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return $name . $check if $check;
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$hash->{DeviceName} = "/dev/i2c-".$dev;
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$hash->{STATE} = "initialized";
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@ -145,6 +157,18 @@ sub RPII2C_Undef($$) { #
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return undef;
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}
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#####################################
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sub RPII2C_Attr(@){
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my (undef, $name, $attr, $val) = @_;
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my $hash = $defs{$name};
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if ($attr && $attr eq 'useHWLib') {
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$hash->{hwfn} = \&RPII2C_HWACCESS_ioctl if $val eq "IOCTL";
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$hash->{hwfn} = \&RPII2C_HWACCESS if $val eq "SMBus";
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} elsif ($attr && $attr eq 'swap_i2c0' && defined($val)) {
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RPII2C_SWAPI2C0($hash,$val);
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}
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return undef;
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}
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#####################################
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sub RPII2C_Set($@) { #writeBlock noch nicht fertig
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my ($hash, @a) = @_;
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my $name = shift @a;
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@ -188,7 +212,7 @@ sub RPII2C_Set($@) { #writeBlock noch nicht fertig
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$i2chash->{reg} = $reg if defined($reg); #startadresse zum lesen
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$i2chash->{nbyte} = $nbyte if defined($nbyte);
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$i2chash->{data} = $data if defined($data);
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RPII2C_HWACCESS($hash, $i2chash);
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&{$hash->{hwfn}}($hash, $i2chash);
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undef $i2chash; #Hash loeschen
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return undef;
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}
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@ -210,7 +234,8 @@ sub RPII2C_Get($@) { #
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$i2chash->{reg} = hex($a[3]) if defined($a[3]); #startadresse zum lesen
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$i2chash->{nbyte} = $a[4] if defined($a[4]);
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#Log3 $hash, 1, "Reg: ". $i2chash->{reg};
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my $status = RPII2C_HWACCESS($hash, $i2chash);
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#my $status = RPII2C_HWACCESS_ioctl($hash, $i2chash);
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my $status = &{$hash->{hwfn}}($hash, $i2chash);
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#my $received = join(" ", @{$i2chash->{received}}); #als Array
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my $received = $i2chash->{received}; #als Scalar
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undef $i2chash; #Hash loeschen
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@ -227,7 +252,8 @@ sub RPII2C_Write($$) { #wird vom Client aufgerufen
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Log3 $hash, 5, $ankommen;
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if ( $clientmsg->{direction} && $clientmsg->{i2caddress} ) {
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$clientmsg->{$name . "_" . "SENDSTAT"} = RPII2C_HWACCESS($hash, $clientmsg);
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$clientmsg->{$name . "_" . "SENDSTAT"} = &{$hash->{hwfn}}($hash, $clientmsg);
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#$clientmsg->{$name . "_" . "SENDSTAT"} = RPII2C_HWACCESS($hash, $clientmsg);
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}
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foreach my $d ( sort keys %main::defs ) { #zur Botschaft passenden Clienten ermitteln geht auf Client: I2CRecFn
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@ -245,6 +271,76 @@ sub RPII2C_Write($$) { #wird vom Client aufgerufen
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return undef;
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}
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#####################################
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#FRM_forall_clients($$$)
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#{
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# my ($hash,$fn,$args) = @_;
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# foreach my $d ( sort keys %main::defs ) {
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# if ( defined( $main::defs{$d} )
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# && defined( $main::defs{$d}{IODev} )
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# && $main::defs{$d}{IODev} == $hash ) {
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# &$fn($main::defs{$d},$args); #funktion mit Varianblennamen von $fn ausführen
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# }
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# }
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# return undef;
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#}
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#####################################
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sub RPII2C_CHECK_GPIO_DEVICE {
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my ($dev) = @_;
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my $ret = undef;
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#unless (defined($hash->{gpio_util_exists})) {
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if(-e $dev) {
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if(-r $dev) {
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unless(-w $dev) {
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$ret = ': Error! I2C device not writable: /dev/i2c-'.$dev . '. Please install wiringpi or change access rights for fhem user';
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}
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} else {
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$ret = ': Error! I2C device not readable: /dev/i2c-'.$dev . '. Please install wiringpi or change access rights for fhem user';
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}
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} else {
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$ret = ': Error! I2C device not found: /dev/i2c-' .$dev . '. Please check kernelmodules must loaded: i2c_bcm2708, i2c_dev';
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}
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return $ret;
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}
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sub RPII2C_CHECK_GPIO_UTIL {
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my ($gpioprg) = @_;
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my $ret = undef;
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#unless (defined($hash->{gpio_util_exists})) {
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if(-e $gpioprg) {
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if(-x $gpioprg) {
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unless(-u $gpioprg) {
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$ret = "file $gpioprg is not setuid";
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}
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} else {
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$ret = "file $gpioprg is not executable";
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}
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} else {
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$ret = "file $gpioprg doesnt exist";
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}
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return $ret;
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}
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sub RPII2C_SWAPI2C0 {
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my ($hash,$set) = @_;
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unless (defined(my $ret = RPII2C_CHECK_GPIO_UTIL($gpioprg))) {
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if (defined($set) && $set eq "on") {
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system "$gpioprg -g mode 0 in";
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system "$gpioprg -g mode 1 in";
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system "$gpioprg -g mode 28 ALT0";
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system "$gpioprg -g mode 29 ALT0";
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} else {
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system "$gpioprg -g mode 28 in";
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system "$gpioprg -g mode 29 in";
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system "$gpioprg -g mode 0 ALT0";
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system "$gpioprg -g mode 1 ALT0";
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}
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} else {
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Log3 $hash, 1, $ret if $ret;
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}
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return
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}
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sub RPII2C_HWACCESS($$) {
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my ($hash, $clientmsg) = @_;
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my $status = "error";
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@ -262,15 +358,15 @@ sub RPII2C_HWACCESS($$) {
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Log3 $hash, 5, "$hash->{NAME}: Block schreiben Register: " . sprintf("0x%.2X", $clientmsg->{reg}) . " Inhalt: " . $wr . " N: ". int(@data) ." Returnvar.: $inh";
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$status = "Ok" if $inh == 0;
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#kommt wieder weg#################
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} elsif (defined($clientmsg->{nbyte}) && defined($clientmsg->{reg}) && defined($clientmsg->{data}) && $clientmsg->{direction} eq "i2cwrite") { #Registerbereich (mehrfach) beschreiben
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my @data = split(" ", $clientmsg->{data});
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foreach (0..$#data) {
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my $i = $_ -( int($_ / $clientmsg->{nbyte}) * $clientmsg->{nbyte} );
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$inh = $dev->writeByteData( ($clientmsg->{reg} + $i ) ,$data[$_]);
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Log3 $hash, 5, "$hash->{NAME} NReg schreiben; Reg: " . ($clientmsg->{reg} + $i) . " Inh: " . $data[$_] . " Returnvar.: $inh";
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last if $inh != 0;
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$status = "Ok" if $inh == 0;
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}
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# } elsif (defined($clientmsg->{nbyte}) && defined($clientmsg->{reg}) && defined($clientmsg->{data}) && $clientmsg->{direction} eq "i2cwrite") { #Registerbereich (mehrfach) beschreiben
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# my @data = split(" ", $clientmsg->{data});
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# foreach (0..$#data) {
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# my $i = $_ -( int($_ / $clientmsg->{nbyte}) * $clientmsg->{nbyte} );
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# $inh = $dev->writeByteData( ($clientmsg->{reg} + $i ) ,$data[$_]);
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# Log3 $hash, 5, "$hash->{NAME} NReg schreiben; Reg: " . ($clientmsg->{reg} + $i) . " Inh: " . $data[$_] . " Returnvar.: $inh";
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# last if $inh != 0;
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# $status = "Ok" if $inh == 0;
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# }
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#hier Mehrfachbeschreibung eines Registers noch entfernen und dafuer Bereich mit Registeroperationen beschreiben
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} elsif (defined($clientmsg->{reg}) && defined($clientmsg->{data}) && $clientmsg->{direction} eq "i2cwrite") { #Register beschreiben
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my @data = split(" ", $clientmsg->{data});
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@ -302,7 +398,7 @@ sub RPII2C_HWACCESS($$) {
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}
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#@{$clientmsg->{received}} = split(" ", $rmsg) if($rmsg); #Daten als Array uebertragen
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$clientmsg->{received} = $rmsg if($rmsg); #Daten als Scalar uebertragen
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} elsif ($clientmsg->{direction} eq "i2cread") { #Byte lesen
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} elsif ($clientmsg->{direction} eq "i2cread") { #Byte lesen #Byte lesen
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my $nbyte = defined($clientmsg->{nbyte}) ? $clientmsg->{nbyte} : 1;
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my $rmsg = "";
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for (my $n = 0; $n < $nbyte; $n++) {
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@ -319,9 +415,85 @@ sub RPII2C_HWACCESS($$) {
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$hash->{STATE} = $status;
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$hash->{ERRORCNT} = defined($hash->{ERRORCNT}) ? $hash->{ERRORCNT} += 1 : 1 if $status ne "Ok";
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$clientmsg->{$hash->{NAME} . "_" . "RAWMSG"} = $inh;
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return $status;
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}
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#####################
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sub RPII2C_HWACCESS_ioctl($$) {
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my ($hash, $clientmsg) = @_;
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my $status = "error";
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Log3 $hash, 5, "$hash->{NAME}: HWaccess I2CAddr: " . sprintf("0x%.2X", $clientmsg->{i2caddress});
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my ($fh, $msg) = undef;
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my $ankommen = "$hash->{NAME}: vom client empfangen";
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foreach my $av (keys %{$clientmsg}) { $ankommen .= "|" . $av . ": " . $clientmsg->{$av}; }
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Log3 $hash, 5, $ankommen;
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my $i2caddr = hex(sprintf "%x", $clientmsg->{i2caddress});
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if ( sysopen(my $fh, $hash->{DeviceName}, O_RDWR) != 1) { #Datei oeffnen
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Log3 $hash, 1, "$hash->{NAME}: HWaccess sysopen failure: $!"
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} elsif( not defined( ioctl($fh,$I2C_SLAVE,$i2caddr) ) ) { #I2C Adresse per ioctl setzen
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Log3 $hash, 1, "$hash->{NAME}: HWaccess (0x".unpack( "H2",pack "C", $clientmsg->{i2caddress}).") ioctl failure: $!"
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} elsif (defined($clientmsg->{nbyte}) && defined($clientmsg->{reg}) && defined($clientmsg->{data}) && $clientmsg->{direction} eq "i2cblockwrite") { #Registerblock beschreiben
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my $data = chr($clientmsg->{reg});
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foreach (split(" ", $clientmsg->{data})) {
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$data .= chr($_);
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}
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my $retval = syswrite($fh, $data, length($data));
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unless (defined($retval) && $retval == length($data)) {
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Log3 $hash, 1, "$hash->{NAME}: HWaccess blockweise nach 0x".unpack( "H2",pack "C", $clientmsg->{i2caddress})." schreiben, Reg: 0x". unpack( "H2",pack "C", $clientmsg->{reg}) . " Inh: $clientmsg->{data}, laenge: ".length($data)."| -> syswrite failure: $!";
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} else {
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$status = "Ok";
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Log3 $hash, 5, "$hash->{NAME}: HWaccess block schreiben, Reg: 0x". unpack( "H2",pack "C", $clientmsg->{reg}) . " Inh(dec):|$clientmsg->{data}|, laenge: |".length($data)."|";
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}
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#(my $datah = $data) =~ s/(.|\n)/sprintf("%.2X ",ord($1))/eg;
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#Log3 $hash, 1, "$hash->{NAME}: HWaccess block schreiben data:|$clientmsg->{data}|, laenge: |".length($data)."|";
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#$status = "Ok" if $resulw == length($data);
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} elsif (defined($clientmsg->{data}) && $clientmsg->{direction} eq "i2cwrite") { #byteweise beschreiben
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my $reg = undef;
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$reg = $clientmsg->{reg} if (defined($clientmsg->{reg}));
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$status = "Ok";
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foreach (split(" ", $clientmsg->{data})) {
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my $data = (defined($reg) ? chr($reg++) : "") . chr($_);
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my $retval = syswrite($fh, $data, length($data));
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unless (defined($retval) && $retval == length($data)) {
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Log3 $hash, 1, "$hash->{NAME}: HWaccess byteweise nach 0x".unpack( "H2",pack "C", $clientmsg->{i2caddress})." schreiben, ". (defined($reg) ? "Reg: 0x". unpack( "H2",pack "C", ($reg - 1)) . " " : "")."Inh: 0x" . unpack( "H2",pack "C", $_) .", laenge: ".length($data)."| -> syswrite failure: $!";
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$status = "error";
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last;
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}
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Log3 $hash, 5, "$hash->{NAME}: HWaccess byteweise schreiben, ". (defined($reg) ? "Reg: 0x". unpack( "H2",pack "C", ($reg - 1)) . " " : "")."Inh: 0x" . unpack( "H2",pack "C", $_) .", laenge: ".length($data);
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}
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} elsif ($clientmsg->{direction} eq "i2cread") { #vom I2C lesen
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my $nbyte = defined($clientmsg->{nbyte}) ? $clientmsg->{nbyte} : 1;
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my $rmsg = "";
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foreach (my $n = 0; $n < $nbyte; $n++) {
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if ( defined($clientmsg->{reg}) ) {
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Log3 $hash, 5, "$hash->{NAME}: HWaccess byteweise lesen setze Registerpointer auf " . ($clientmsg->{reg} + $n);
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my $retval = syswrite($fh, chr($clientmsg->{reg} + $n), 1);
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unless (defined($retval) && $retval == 1) {
|
||||
Log3 $hash, 1, "$hash->{NAME}: HWaccess byteweise von 0x".unpack( "H2",pack "C", $clientmsg->{i2caddress})." lesen,". (defined($clientmsg->{reg}) ? " Reg: 0x". unpack( "H2",pack "C", ($clientmsg->{reg} + $n)) : "") . " -> syswrite failure: $!" if $!;
|
||||
last;
|
||||
}
|
||||
}
|
||||
my $buf = undef;
|
||||
my $retval = sysread($fh, $buf, 1);
|
||||
unless (defined($retval) && $retval == 1) {
|
||||
Log3 $hash, 1, "$hash->{NAME}: HWaccess byteweise von 0x".unpack( "H2",pack "C", $clientmsg->{i2caddress})." lesen,". (defined($clientmsg->{reg}) ? " Reg: 0x". unpack( "H2",pack "C", ($clientmsg->{reg} + $n)) : "") . " -> sysread failure: $!" if $!;
|
||||
last;
|
||||
}
|
||||
$rmsg .= ord($buf);
|
||||
$rmsg .= " " if $n <= $nbyte;
|
||||
$status = "Ok" if ($n + 1) == $nbyte;
|
||||
}
|
||||
$clientmsg->{received} = $rmsg if($rmsg); #Daten als Scalar uebertragen
|
||||
}
|
||||
$hash->{STATE} = $status;
|
||||
$hash->{ERRORCNT} = defined($hash->{ERRORCNT}) ? $hash->{ERRORCNT} += 1 : 1 if $status ne "Ok";
|
||||
#$clientmsg->{$hash->{NAME} . "_" . "RAWMSG"} = $inh;
|
||||
return $status;
|
||||
}
|
||||
|
||||
|
||||
=pod
|
||||
=begin html
|
||||
@ -336,10 +508,23 @@ sub RPII2C_HWACCESS($$) {
|
||||
<b>preliminary:</b><br>
|
||||
<ul>
|
||||
<li>
|
||||
This module uses gpio utility from <a href="http://wiringpi.com/download-and-install/">WiringPi</a> library change access rights of I2C-Interface<br>
|
||||
WiringPi installation is described here: <a href="#RPI_GPIO">RPI_GPIO</a><br>
|
||||
Alternatively for other systems (BeagleBone, etc.) you can manually change access rights for <code>/dev/i2c-x</code>. You will need write-/read access for user that runs FHEM. This can be doen e.g. in etc/init.d/fhem<br>
|
||||
|
||||
Access rights for /dev/i2c-* devices
|
||||
<ul>
|
||||
<li>
|
||||
Add following lines into <code>/etc/init.d/fhem</code> before <code>perl fhem.pl</code> line in start or into <code>/etc/rc.local</code>:<br>
|
||||
<code>
|
||||
sudo chown fhem /dev/i2c-*<br>
|
||||
sudo chgrp dialout /dev/i2c-*<br>
|
||||
sudo chmod +t /dev/i2c-*<br>
|
||||
sudo chmod 660 /dev/i2c-*<br>
|
||||
</code>
|
||||
</li>
|
||||
<li>
|
||||
Alternatively for Raspberry Pi you can install the gpio utility from <a href="http://wiringpi.com/download-and-install/">WiringPi</a> library change access rights of I2C-Interface<br>
|
||||
WiringPi installation is described here: <a href="#RPI_GPIO">RPI_GPIO.</a><br>
|
||||
gpio utility will be automaticly used, if installed.<br>
|
||||
</li>
|
||||
</ul>
|
||||
</li>
|
||||
<li>
|
||||
installation of i2c dependencies:<br>
|
||||
@ -356,7 +541,8 @@ sub RPII2C_HWACCESS($$) {
|
||||
</code>
|
||||
</li>
|
||||
<li>
|
||||
To access the I2C-Bus the Device::SMBus module is necessary:<br>
|
||||
Optional, access via IOCTL will be used if Device::SMBus is not present.<br>
|
||||
To access the I2C-Bus via the Device::SMBus module, following steps are necessary:<br>
|
||||
<code>sudo apt-get install libmoose-perl<br>
|
||||
sudo cpan Device::SMBus</code><br>
|
||||
</li>
|
||||
@ -376,16 +562,12 @@ sub RPII2C_HWACCESS($$) {
|
||||
<code>set <name> writeByte <I2C Address> <value></code><br><br>
|
||||
</li>
|
||||
<li>
|
||||
Write one byte (or more bytes sequentially) to the specified register of an I2C device:<br>
|
||||
Write n-bytes to an register range (as an series of single register write operations), beginning at the specified register:<br>
|
||||
<code>set <name> writeByteReg <I2C Address> <Register Address> <value></code><br><br>
|
||||
</li>
|
||||
<li>
|
||||
Write n-bytes to an register range, beginning at the specified register:<br>
|
||||
Write n-bytes to an register range (as an block write operation), beginning at the specified register:<br>
|
||||
<code>set <name> writeBlock <I2C Address> <Register Address> <value></code><br><br>
|
||||
</li>
|
||||
<li>
|
||||
Same as writeBlock but writes register range sequentially. The numbers of byte to write must be a multipe of the number of register.
|
||||
<code>set <name> writeNBlock <I2C Address> <Register Address> <number of registers> <value></code><br><br>
|
||||
</li><br>
|
||||
Examples:
|
||||
<ul>
|
||||
@ -421,6 +603,16 @@ sub RPII2C_HWACCESS($$) {
|
||||
<a name="RPII2CAttr"></a>
|
||||
<b>Attributes</b>
|
||||
<ul>
|
||||
<li>swap_i2c0<br>
|
||||
Swap Raspberry Pi's I2C-0 from J5 to P5 rev. B<br>
|
||||
This attribute is for Raspberry Pi only and needs gpio utility from <a href="http://wiringpi.com/download-and-install/">WiringPi</a> library.<br>
|
||||
Default: none, valid values: on, off<br><br>
|
||||
</li>
|
||||
<li>useHWLib<br>
|
||||
Change hardware access method.<br>
|
||||
Attribute exists only if both access methods are usable<br>
|
||||
Default: IOCTL, valid values: IOCTL, SMBus<br><br>
|
||||
</li>
|
||||
<li><a href="#ignore">ignore</a></li>
|
||||
<li><a href="#do_not_notify">do_not_notify</a></li>
|
||||
<li><a href="#showtime">showtime</a></li>
|
||||
@ -442,9 +634,22 @@ sub RPII2C_HWACCESS($$) {
|
||||
<b>Vorbereitung:</b><br>
|
||||
<ul>
|
||||
<li>
|
||||
Dieses Modul nutzt das gpio Utility der <a href="http://wiringpi.com/download-and-install/">WiringPi</a> Bibliothek um FHEM Schreibrechte auf die I2C Schnittstelle zu geben.<br>
|
||||
WiringPi Installation ist hier beschrieben: <a href="#RPI_GPIO">RPI_GPIO</a><br>
|
||||
Für andere Systeme (BeagleBone, etc.) oder auch für das Raspberry kann auf WiringPi verzichtet werden. In diesem Fall müssen die Dateien <code>/dev/i2c-x</code> Schreib-/Leserechte, für den User unter dem FHEM läuft, gesetzt bekommen. (z.B. in der etc/init.d/fhem)<br>
|
||||
<ul>
|
||||
<li>
|
||||
Folgende Zeilen müssen der Datei <code>/etc/init.d/fhem</code> vor <code>perl fhem.pl</code> in start hinzu, oder in die Datei <code>/etc/rc.local</code> eingefügt werden:<br>
|
||||
<code>
|
||||
sudo chown fhem /dev/i2c-*<br>
|
||||
sudo chgrp dialout /dev/i2c-*<br>
|
||||
sudo chmod +t /dev/i2c-*<br>
|
||||
sudo chmod 660 /dev/i2c-*<br>
|
||||
</code>
|
||||
</li>
|
||||
<li>
|
||||
Für das Raspberry Pi kann alternativ das gpio Utility der <a href="http://wiringpi.com/download-and-install/">WiringPi</a> Bibliothek benutzt werden um FHEM Schreibrechte auf die I2C Schnittstelle zu bekommen.<br>
|
||||
WiringPi Installation ist hier beschrieben: <a href="#RPI_GPIO">RPI_GPIO</a><br>
|
||||
Das gpio Utility wird, wenn vorhanden, automatisch verwendet<br>
|
||||
</li>
|
||||
</ul>
|
||||
</li>
|
||||
<li>
|
||||
Installation der I2C Abhängigkeiten:<br>
|
||||
@ -461,7 +666,8 @@ sub RPII2C_HWACCESS($$) {
|
||||
</code>
|
||||
</li>
|
||||
<li>
|
||||
Desweiteren ist das Perl Modul Device::SMBus für den Zugrff auf den I2C Bus notwendig:<br>
|
||||
Optional, Hardwarezugriff via IOCTL wird standardmäßig genutzt, wenn Device::SMBus nicht installiert ist<br>
|
||||
Soll der Hardwarezugriff über das Perl Modul Device::SMBus erfolgen sind diese Schritte notwendig:<br>
|
||||
<code>sudo apt-get install libmoose-perl<br>
|
||||
sudo cpan Device::SMBus</code><br>
|
||||
</li>
|
||||
@ -481,16 +687,12 @@ sub RPII2C_HWACCESS($$) {
|
||||
<code>set <name> writeByte <I2C Address> <value></code><br><br>
|
||||
</li>
|
||||
<li>
|
||||
Schreibe ein Byte (oder auch mehrere nacheinander) direkt auf ein Register des adressierten I2C device:<br>
|
||||
Schreibe n-bytes auf einen Registerbereich (als Folge von Einzelbefehlen), beginnend mit dem angegebenen Register:<br>
|
||||
<code>set <name> writeByteReg <I2C Address> <Register Address> <value></code><br><br>
|
||||
</li>
|
||||
<li>
|
||||
Schreibe n-bytes auf einen Registerbereich, beginnend mit dem angegebenen Register:<br>
|
||||
Schreibe n-bytes auf einen Registerbereich (als Blockoperation), beginnend mit dem angegebenen Register:<br>
|
||||
<code>set <name> writeBlock <I2C Address> <Register Address> <value></code><br><br>
|
||||
</li>
|
||||
<li>
|
||||
Identisch zu writeBlock nur kann der Registerbereich sequentiell beschrieben werden. Die Anzahl der Byte muss ein vielfaches der <number of registers> sein.
|
||||
<code>set <name> writeNBlock <I2C Address> <Register Address> <number of registers> <value></code><br><br>
|
||||
</li><br>
|
||||
Beispiele:
|
||||
<ul>
|
||||
@ -525,6 +727,16 @@ sub RPII2C_HWACCESS($$) {
|
||||
<a name="RPII2CAttr"></a>
|
||||
<b>Attribute</b>
|
||||
<ul>
|
||||
<li>swap_i2c0<br>
|
||||
Umschalten von I2C-0 des Raspberry Pi Rev. B von J5 auf P5<br>
|
||||
Dieses Attribut ist nur für das Raspberry Pi vorgesehen und benötigt das gpio utility wie unter dem Punkt Vorbereitung beschrieben.<br>
|
||||
Standard: keiner, gültige Werte: on, off<br><br>
|
||||
</li>
|
||||
<li>useHWLib<br>
|
||||
Ändern der Methode des Hardwarezugriffs.<br>
|
||||
Dieses Attribut existiert nur, wenn beide Zugriffsmethoden verfügbar sind<br>
|
||||
Standard: IOCTL, gültige Werte: IOCTL, SMBus<br><br>
|
||||
</li>
|
||||
<li><a href="#ignore">ignore</a></li>
|
||||
<li><a href="#do_not_notify">do_not_notify</a></li>
|
||||
<li><a href="#showtime">showtime</a></li>
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user