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# You may distribute under the terms of either the GNU General Public License |
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# or the Artistic License (the same terms as Perl itself) |
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# |
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# (C) Paul Evans, 2016-2023 -- leonerd@leonerd.org.uk |
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1048974
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use v5.26; |
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use warnings; |
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use Object::Pad 0.800; |
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package Device::Chip::SDCard 0.04; |
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class Device::Chip::SDCard |
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:isa(Device::Chip); |
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use Future::AsyncAwait; |
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2250
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use Data::Bitfield qw( bitfield boolfield ); |
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use constant PROTOCOL => "SPI"; |
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4270
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=head1 NAME |
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C - chip driver for F and F cards |
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=head1 SYNOPSIS |
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use Device::Chip::SDCard; |
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use Future::AsyncAwait; |
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29
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my $card = Device::Chip::SDCard->new; |
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await $card->mount( Device::Chip::Adapter::...->new ); |
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await $card->initialise; |
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my $bytes = await $card->read_block( 0 ); |
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print "Read block zero:\n"; |
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printf "%v02X\n", $bytes; |
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40
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=head1 DESCRIPTION |
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42
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This L subclass provides specific communication to an F or |
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F storage card attached via an SPI adapter. |
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45
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At present it only supports MMC and SDSC ("standard capacity") cards, not SDHC |
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or SDXC. |
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=cut |
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50
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method SPI_options |
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0
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1480
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{ |
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return ( |
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25
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mode => 0, |
54
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max_bitrate => 1E6, |
55
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); |
56
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} |
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58
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=head1 METHODS |
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60
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The following methods documented in an C expression return L |
61
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instances. |
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63
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=cut |
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65
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6
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async method send_command ( $cmd, $arg = 0, $readlen = 0 ) |
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66
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15
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{ |
67
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7
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my $crcstop = 0x95; |
68
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69
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# TODO: until we can perform dynamic transactions with D:C:A we'll have to |
70
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# do this by presuming the maximum amount of time for the card to respond |
71
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# (8 words) and look for the response in what's returned |
72
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73
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5
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14
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my ( $resp ) = await $self->protocol->readwrite( |
74
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pack "C N C a*", 0x40 | $cmd, $arg, $crcstop, "\xFF" x ( 8 + $readlen ), |
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); |
76
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77
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# Trim to the start of the expected result |
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5
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12295
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substr $resp, 0, 7, ""; |
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80
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# Look for a byte with top bit clear |
81
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13
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while( length $resp ) { |
82
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22
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my $ret = unpack( "C", $resp ); |
83
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100
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47
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return ( $ret, unpack "x a$readlen", $resp ) if !( $ret & 0x80 ); |
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85
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18
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substr $resp, 0, 1, ""; |
86
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} |
87
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88
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0
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0
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die sprintf "Timed out waiting for response to command %02X", $cmd; |
89
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0
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294
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} |
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91
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4
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6
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async method _recv_data_block ( $buf, $len ) |
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92
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{ |
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# Wait for a token |
94
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6
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while(1) { |
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3366
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$buf =~ s/^\xFF+//; |
96
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97
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100
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25
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last if $buf =~ s/^\xFE//; |
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99
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3
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$buf .= await $self->protocol->readwrite_no_ss( "\xFF" x 16 ); |
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} |
101
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102
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# Now want the data + CRC |
103
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50
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14
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if( length $buf < $len + 2 ) { |
104
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13
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$buf .= await $self->protocol->readwrite_no_ss( "\xFF" x ( $len + 2 - length $buf ) ); |
105
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} |
106
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107
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# TODO: might want to verify the CRC? |
108
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109
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4
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4387
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return substr $buf, 0, $len; |
110
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4
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4
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6
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} |
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112
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# Commands |
113
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use constant { |
114
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5
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559
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CMD_GO_IDLE_STATE => 0, |
115
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CMD_SEND_OP_COND => 1, |
116
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CMD_SEND_CSD => 9, |
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CMD_SET_BLOCKLEN => 16, |
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CMD_READ_SINGLE_BLOCK => 17, |
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CMD_READ_OCR => 58, |
120
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5
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5
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36
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}; |
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5
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8
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121
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122
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# Response first byte bitflags |
123
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use constant { |
124
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5
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13918
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RESP_PARAM_ERROR => 1<<6, |
125
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RESP_ADDR_ERROR => 1<<5, |
126
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RESP_ERASESEQ_ERROR => 1<<4, |
127
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RESP_CRC_ERROR => 1<<3, |
128
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RESP_ILLEGAL_CMD => 1<<2, |
129
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RESP_ERASE_RESET => 1<<1, |
130
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RESP_IDLE => 1<<0, |
131
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5
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5
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27
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}; |
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10
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132
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133
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=head2 initialise |
134
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135
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await $card->initialise; |
136
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137
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Checks that an SD card is present, switches it into SPI mode and waits for its |
138
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initialisation process to complete. |
139
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140
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=cut |
141
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142
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1
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2
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async method initialise () |
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1
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143
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1
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3
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{ |
144
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# Initialise first by switching the card into SPI mode |
145
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1
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4
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await $self->protocol->write( "\xFF" x 10 ); |
146
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147
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1
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7656
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my $resp = await $self->send_command( CMD_GO_IDLE_STATE ); |
148
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1
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50
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69
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$resp == 1 or die "Expected 01 response; got $resp"; |
149
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150
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1
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4
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foreach my $attempt ( 1 .. 200 ) { |
151
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# TODO: Consider using SEND_IF_COND and doing SDHC initialisation |
152
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2
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6
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$resp = await $self->send_command( CMD_SEND_OP_COND ); |
153
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2
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100
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124
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last unless $resp & RESP_IDLE; |
154
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} |
155
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156
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1
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50
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4
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$resp & RESP_IDLE and die "Timed out waiting for card to leave IDLE mode"; |
157
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158
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1
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3
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$resp = await $self->send_command( CMD_SET_BLOCKLEN, 512 ); |
159
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1
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50
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61
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$resp == 0 or die "Expected 00 response; got $resp"; |
160
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161
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1
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5
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return; |
162
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1
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1
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1
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419
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} |
163
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164
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=head2 size |
165
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166
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$n_bytes = await $card->size; |
167
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168
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Returns the size of the media card in bytes. |
169
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170
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=cut |
171
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172
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0
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0
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async method size () |
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0
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0
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173
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0
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0
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{ |
174
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0
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0
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my $csd = await $self->read_csd; |
175
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176
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0
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0
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return $csd->{bytes}; |
177
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0
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0
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1
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0
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} |
178
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179
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4
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5
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method _spi_txn ( $code ) |
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6
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4
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5
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180
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4
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9
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{ |
181
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$self->protocol->assert_ss->then( |
182
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$code |
183
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)->followed_by( sub { |
184
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4
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4
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611
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my ( $f ) = @_; |
185
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4
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11
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$self->protocol->release_ss->then( sub { $f } ); |
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4
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4585
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186
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4
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19
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}); |
187
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} |
188
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189
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=head2 read_csd |
190
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191
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$data = await $card->read_csd; |
192
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193
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Returns a C reference containing decoded fields from the SD card's CSD |
194
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("card-specific data") register. |
195
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196
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This hash will contain the following fields: |
197
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198
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TAAC |
199
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NSAC |
200
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TRAN_SPEED |
201
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CCC |
202
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READ_BL_LEN |
203
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READ_BL_LEN_PARTIAL |
204
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WRITE_BLK_MISALIGN |
205
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READ_BLK_MISALIGN |
206
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DSR_IMP |
207
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C_SIZE |
208
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|
VDD_R_CURR_MIN |
209
|
|
|
|
|
|
|
VDD_R_CURR_MAX |
210
|
|
|
|
|
|
|
VDD_W_CURR_MIN |
211
|
|
|
|
|
|
|
VDD_W_CURR_MAX |
212
|
|
|
|
|
|
|
C_SIZE_MULT |
213
|
|
|
|
|
|
|
ERASE_BLK_EN |
214
|
|
|
|
|
|
|
SECTOR_SIZE |
215
|
|
|
|
|
|
|
WP_GRP_SIZE |
216
|
|
|
|
|
|
|
WP_GRP_ENABLE |
217
|
|
|
|
|
|
|
R2W_FACTOR |
218
|
|
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|
|
|
|
WRITE_BL_LEN |
219
|
|
|
|
|
|
|
WRITE_BL_PARTIAL |
220
|
|
|
|
|
|
|
FILE_FORMAT_GRP |
221
|
|
|
|
|
|
|
COPY |
222
|
|
|
|
|
|
|
PERM_WRITE_PROTECT |
223
|
|
|
|
|
|
|
TEMP_WRITE_PROTECT |
224
|
|
|
|
|
|
|
FILE_FORMAT |
225
|
|
|
|
|
|
|
|
226
|
|
|
|
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|
|
The hash will also contain the following calculated fields, derived from the |
227
|
|
|
|
|
|
|
decoded fields above for convenience of calling code. |
228
|
|
|
|
|
|
|
|
229
|
|
|
|
|
|
|
blocks # number of blocks implied by C_SIZE / C_SIZE_MULT |
230
|
|
|
|
|
|
|
bytes # number of bytes of storage, implied by blocks and READ_BL_LEN |
231
|
|
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|
|
|
|
|
232
|
|
|
|
|
|
|
=cut |
233
|
|
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|
|
|
|
|
234
|
|
|
|
|
|
|
# This code is most annoying to write as it involves lots of bitwise unpacking |
235
|
|
|
|
|
|
|
# at non-byte boundaries. It's easier (though inefficient) to perform this on |
236
|
|
|
|
|
|
|
# an array of 128 1-bit values |
237
|
|
|
|
|
|
|
sub _bits_to_uint ( @vals ) |
238
|
17
|
|
|
17
|
|
20
|
{ |
|
17
|
|
|
|
|
42
|
|
|
17
|
|
|
|
|
20
|
|
239
|
17
|
|
|
|
|
18
|
my $n = 0; |
240
|
17
|
|
|
|
|
40
|
( $n <<= 1 ) |= $_ for reverse @vals; |
241
|
17
|
|
|
|
|
86
|
return $n; |
242
|
|
|
|
|
|
|
} |
243
|
|
|
|
|
|
|
|
244
|
|
|
|
|
|
|
my %_DECSCALE = ( |
245
|
|
|
|
|
|
|
1 => 1.0, 2 => 1.2, 3 => 1.3, 4 => 1.5, 5 => 2.0, 6 => 2.5, |
246
|
|
|
|
|
|
|
7 => 3.0, 8 => 3.5, 9 => 4.0, 0xA => 4.5, 0xB => 5.0, |
247
|
|
|
|
|
|
|
0xC => 5.5, 0xD => 6.0, 0xE => 7.0, 0xF => 8.0 |
248
|
|
|
|
|
|
|
); |
249
|
|
|
|
|
|
|
|
250
|
2
|
|
|
|
|
3
|
sub _convert_decimal ( $unit, $val ) |
251
|
2
|
|
|
2
|
|
3
|
{ |
|
2
|
|
|
|
|
3
|
|
|
2
|
|
|
|
|
2
|
|
252
|
2
|
|
|
|
|
5
|
my $mult = $unit % 3; |
253
|
2
|
|
|
|
|
2
|
$unit -= $mult; |
254
|
2
|
|
|
|
|
4
|
$unit /= 3; |
255
|
|
|
|
|
|
|
|
256
|
2
|
|
|
|
|
7
|
$val = $_DECSCALE{$val} * ( 10 ** $mult ); |
257
|
|
|
|
|
|
|
|
258
|
2
|
|
|
|
|
15
|
return $val . substr( "num kMG", $unit + 3, 1 ); |
259
|
|
|
|
|
|
|
} |
260
|
|
|
|
|
|
|
|
261
|
|
|
|
|
|
|
my %_CURRMIN = ( |
262
|
|
|
|
|
|
|
0 => 0.5, 1 => 1, 2 => 5, 3 => 10, |
263
|
|
|
|
|
|
|
4 => 25, 5 => 35, 6 => 60, 7 => 100, |
264
|
|
|
|
|
|
|
); |
265
|
|
|
|
|
|
|
my %_CURRMAX = ( |
266
|
|
|
|
|
|
|
0 => 1, 1 => 5, 2 => 10, 3 => 25, |
267
|
|
|
|
|
|
|
4 => 35, 5 => 45, 6 => 80, 7 => 200, |
268
|
|
|
|
|
|
|
); |
269
|
|
|
|
|
|
|
|
270
|
|
|
|
|
|
|
sub _unpack_csd_v0 ( $bytes ) |
271
|
1
|
|
|
1
|
|
2
|
{ |
|
1
|
|
|
|
|
2
|
|
|
1
|
|
|
|
|
2
|
|
272
|
1
|
|
|
|
|
31
|
my @bits = reverse split //, unpack "B128", $bytes; |
273
|
|
|
|
|
|
|
|
274
|
|
|
|
|
|
|
my %csd = ( |
275
|
|
|
|
|
|
|
TAAC => _convert_decimal( _bits_to_uint( @bits[112 .. 114] ) - 9, _bits_to_uint( @bits[115 .. 118] ) ) . "s", |
276
|
|
|
|
|
|
|
NSAC => 100*_bits_to_uint( @bits[104 .. 111] ) . "ck", |
277
|
|
|
|
|
|
|
TRAN_SPEED => _convert_decimal( _bits_to_uint( @bits[ 96 .. 98] ) + 5, _bits_to_uint( @bits[ 99 .. 102] ) ) . "bit/s", |
278
|
12
|
|
|
|
|
22
|
CCC => [ grep { $bits[84+$_] } 0 .. 11 ], |
279
|
|
|
|
|
|
|
READ_BL_LEN => 2**_bits_to_uint( @bits[ 80 .. 83] ), |
280
|
|
|
|
|
|
|
READ_BL_LEN_PARTIAL => $bits[79], |
281
|
|
|
|
|
|
|
WRITE_BLK_MISALIGN => $bits[78], |
282
|
|
|
|
|
|
|
READ_BLK_MISALIGN => $bits[77], |
283
|
|
|
|
|
|
|
DSR_IMP => $bits[76], |
284
|
|
|
|
|
|
|
C_SIZE => _bits_to_uint( @bits[ 62 .. 73] ), |
285
|
|
|
|
|
|
|
VDD_R_CURR_MIN => $_CURRMIN{ _bits_to_uint( @bits[ 59 .. 61] ) } . "mA", |
286
|
|
|
|
|
|
|
VDD_R_CURR_MAX => $_CURRMAX{ _bits_to_uint( @bits[ 56 .. 58] ) } . "mA", |
287
|
|
|
|
|
|
|
VDD_W_CURR_MIN => $_CURRMIN{ _bits_to_uint( @bits[ 53 .. 55] ) } . "mA", |
288
|
1
|
|
|
|
|
7
|
VDD_W_CURR_MAX => $_CURRMAX{ _bits_to_uint( @bits[ 50 .. 52] ) } . "mA", |
289
|
|
|
|
|
|
|
C_SIZE_MULT => _bits_to_uint( @bits[ 47 .. 49] ), |
290
|
|
|
|
|
|
|
ERASE_BLK_EN => $bits[46], |
291
|
|
|
|
|
|
|
SECTOR_SIZE => 1+_bits_to_uint( @bits[ 39 .. 45] ), |
292
|
|
|
|
|
|
|
WP_GRP_SIZE => 1+_bits_to_uint( @bits[ 32 .. 38] ), |
293
|
|
|
|
|
|
|
WP_GRP_ENABLE => $bits[31], |
294
|
|
|
|
|
|
|
R2W_FACTOR => 2**_bits_to_uint( @bits[ 26 .. 28] ), |
295
|
|
|
|
|
|
|
WRITE_BL_LEN => 2**_bits_to_uint( @bits[ 22 .. 25] ), |
296
|
|
|
|
|
|
|
WRITE_BL_PARTIAL => $bits[21], |
297
|
|
|
|
|
|
|
FILE_FORMAT_GRP => $bits[15], |
298
|
|
|
|
|
|
|
COPY => $bits[14], |
299
|
|
|
|
|
|
|
PERM_WRITE_PROTECT => $bits[13], |
300
|
|
|
|
|
|
|
TEMP_WRITE_PROTECT => $bits[12], |
301
|
|
|
|
|
|
|
FILE_FORMAT => _bits_to_uint( @bits[ 10 .. 11] ), |
302
|
|
|
|
|
|
|
# Final bits are the CRC, which we ignore |
303
|
|
|
|
|
|
|
); |
304
|
|
|
|
|
|
|
|
305
|
1
|
|
|
|
|
5
|
$csd{blocks} = ( 1 + $csd{C_SIZE} ) * ( 2 ** ( $csd{C_SIZE_MULT} + 2 ) ); |
306
|
1
|
|
|
|
|
4
|
$csd{bytes} = $csd{blocks} * $csd{READ_BL_LEN}; |
307
|
|
|
|
|
|
|
|
308
|
1
|
|
|
|
|
24
|
return \%csd; |
309
|
|
|
|
|
|
|
} |
310
|
|
|
|
|
|
|
|
311
|
1
|
|
|
|
|
2
|
async method read_csd () |
|
1
|
|
|
|
|
1
|
|
312
|
1
|
|
|
|
|
3
|
{ |
313
|
1
|
|
|
|
|
3
|
my $protocol = $self->protocol; |
314
|
|
|
|
|
|
|
|
315
|
1
|
|
|
1
|
|
7796
|
my $csd = await $self->_spi_txn( async sub { |
316
|
1
|
|
|
|
|
6
|
await $protocol->write_no_ss( |
317
|
|
|
|
|
|
|
pack "C N C a*", 0x40 | CMD_SEND_CSD, 0, 0xFF, "\xFF" |
318
|
|
|
|
|
|
|
); |
319
|
|
|
|
|
|
|
|
320
|
1
|
|
|
|
|
1201
|
my $buf = await $protocol->readwrite_no_ss( "\xFF" x 8 ); |
321
|
|
|
|
|
|
|
|
322
|
1
|
|
|
|
|
1119
|
$buf =~ s/^\xFF*//; |
323
|
1
|
50
|
|
|
|
6
|
$buf =~ s/^\0// or |
324
|
|
|
|
|
|
|
return Future->fail( sprintf "Expected response 00; got %02X to SEND_CSD", ord $buf ); |
325
|
|
|
|
|
|
|
|
326
|
1
|
|
|
|
|
6
|
return await $self->_recv_data_block( $buf, 16 ); |
327
|
1
|
|
|
|
|
11
|
}); |
328
|
|
|
|
|
|
|
|
329
|
|
|
|
|
|
|
# Top two bits give the structure version |
330
|
1
|
|
|
|
|
143
|
my $ver = vec( $csd, 0, 2 ); |
331
|
1
|
50
|
|
|
|
5
|
if( $ver == 0 ) { |
|
|
0
|
|
|
|
|
|
332
|
1
|
|
|
|
|
5
|
return _unpack_csd_v0( $csd ); |
333
|
|
|
|
|
|
|
} |
334
|
|
|
|
|
|
|
elsif( $ver == 1 ) { |
335
|
0
|
|
|
|
|
0
|
return _unpack_csd_v1( $csd ); |
336
|
|
|
|
|
|
|
} |
337
|
|
|
|
|
|
|
else { |
338
|
0
|
|
|
|
|
0
|
die "Bad CSD structure version $ver"; |
339
|
|
|
|
|
|
|
} |
340
|
1
|
|
|
1
|
1
|
422
|
} |
341
|
|
|
|
|
|
|
|
342
|
|
|
|
|
|
|
=head2 read_ocr |
343
|
|
|
|
|
|
|
|
344
|
|
|
|
|
|
|
$fields = await $card->read_ocr; |
345
|
|
|
|
|
|
|
|
346
|
|
|
|
|
|
|
Returns a C reference containing decoded fields from the card's OCR |
347
|
|
|
|
|
|
|
("operating conditions register"). |
348
|
|
|
|
|
|
|
|
349
|
|
|
|
|
|
|
This hash will contain the following fields: |
350
|
|
|
|
|
|
|
|
351
|
|
|
|
|
|
|
BUSY |
352
|
|
|
|
|
|
|
CCS |
353
|
|
|
|
|
|
|
UHS_II |
354
|
|
|
|
|
|
|
1V8_ACCEPTED |
355
|
|
|
|
|
|
|
3V5, 3V4, 3V3, ..., 2V7 |
356
|
|
|
|
|
|
|
|
357
|
|
|
|
|
|
|
=cut |
358
|
|
|
|
|
|
|
|
359
|
|
|
|
|
|
|
bitfield OCR => |
360
|
|
|
|
|
|
|
BUSY => boolfield( 31 ), |
361
|
|
|
|
|
|
|
CCS => boolfield( 30 ), |
362
|
|
|
|
|
|
|
UHS_II => boolfield( 29 ), |
363
|
|
|
|
|
|
|
'1V8_ACCEPTED' => boolfield( 24 ), |
364
|
|
|
|
|
|
|
'3V5' => boolfield( 23 ), |
365
|
|
|
|
|
|
|
'3V4' => boolfield( 22 ), |
366
|
|
|
|
|
|
|
'3V3' => boolfield( 21 ), |
367
|
|
|
|
|
|
|
'3V2' => boolfield( 20 ), |
368
|
|
|
|
|
|
|
'3V1' => boolfield( 19 ), |
369
|
|
|
|
|
|
|
'3V0' => boolfield( 18 ), |
370
|
|
|
|
|
|
|
'2V9' => boolfield( 17 ), |
371
|
|
|
|
|
|
|
'2V8' => boolfield( 16 ), |
372
|
|
|
|
|
|
|
'2V7' => boolfield( 15 ); |
373
|
|
|
|
|
|
|
|
374
|
0
|
|
|
|
|
0
|
async method read_ocr () |
|
0
|
|
|
|
|
0
|
|
375
|
0
|
|
|
|
|
0
|
{ |
376
|
0
|
|
|
|
|
0
|
my ( $resp, $ocr ) = await $self->send_command( CMD_READ_OCR, undef, 4 ); |
377
|
|
|
|
|
|
|
|
378
|
0
|
|
|
|
|
0
|
return { unpack_OCR( unpack "N", $ocr ) }; |
379
|
0
|
|
|
0
|
1
|
0
|
} |
380
|
|
|
|
|
|
|
|
381
|
|
|
|
|
|
|
=head2 read_block |
382
|
|
|
|
|
|
|
|
383
|
|
|
|
|
|
|
$bytes = await $card->read_block( $lba ); |
384
|
|
|
|
|
|
|
|
385
|
|
|
|
|
|
|
Returns a 512-byte bytestring containing data read from the given sector of |
386
|
|
|
|
|
|
|
the card. |
387
|
|
|
|
|
|
|
|
388
|
|
|
|
|
|
|
=cut |
389
|
|
|
|
|
|
|
|
390
|
3
|
|
|
|
|
4
|
async method read_block ( $lba ) |
|
3
|
|
|
|
|
4
|
|
|
3
|
|
|
|
|
5
|
|
391
|
3
|
|
|
|
|
7
|
{ |
392
|
3
|
|
|
|
|
5
|
my $byteaddr = $lba * 512; |
393
|
|
|
|
|
|
|
|
394
|
3
|
|
|
|
|
8
|
my $protocol = $self->protocol; |
395
|
|
|
|
|
|
|
|
396
|
3
|
|
|
|
|
14
|
my $buf; |
397
|
|
|
|
|
|
|
|
398
|
3
|
|
|
3
|
|
10128
|
return await $self->_spi_txn( async sub { |
399
|
3
|
|
|
|
|
20
|
await $protocol->write_no_ss( |
400
|
|
|
|
|
|
|
pack "C N C a*", 0x40 | CMD_READ_SINGLE_BLOCK, $byteaddr, 0xFF, "\xFF" |
401
|
|
|
|
|
|
|
); |
402
|
|
|
|
|
|
|
|
403
|
3
|
|
|
|
|
3301
|
my $buf = await $protocol->readwrite_no_ss( "\xFF" x 8 ); |
404
|
|
|
|
|
|
|
|
405
|
3
|
|
|
|
|
3213
|
$buf =~ s/^\xFF*//; |
406
|
3
|
50
|
|
|
|
12
|
$buf =~ s/^\0// or |
407
|
|
|
|
|
|
|
die sprintf "Expected response 00; got %02X to READ_SINGLE_BLOCK", ord $buf; |
408
|
|
|
|
|
|
|
|
409
|
3
|
|
|
|
|
10
|
return await $self->_recv_data_block( $buf, 512 ); |
410
|
3
|
|
|
|
|
16
|
}); |
411
|
3
|
|
|
3
|
1
|
13871
|
} |
412
|
|
|
|
|
|
|
|
413
|
|
|
|
|
|
|
=head1 TODO |
414
|
|
|
|
|
|
|
|
415
|
|
|
|
|
|
|
=over 4 |
416
|
|
|
|
|
|
|
|
417
|
|
|
|
|
|
|
=item * |
418
|
|
|
|
|
|
|
|
419
|
|
|
|
|
|
|
Support block writing. |
420
|
|
|
|
|
|
|
|
421
|
|
|
|
|
|
|
=item * |
422
|
|
|
|
|
|
|
|
423
|
|
|
|
|
|
|
Support the different initialisation sequence (and block size requirements) of |
424
|
|
|
|
|
|
|
SDHC cards. |
425
|
|
|
|
|
|
|
|
426
|
|
|
|
|
|
|
=back |
427
|
|
|
|
|
|
|
|
428
|
|
|
|
|
|
|
=head1 AUTHOR |
429
|
|
|
|
|
|
|
|
430
|
|
|
|
|
|
|
Paul Evans |
431
|
|
|
|
|
|
|
|
432
|
|
|
|
|
|
|
=cut |
433
|
|
|
|
|
|
|
|
434
|
|
|
|
|
|
|
0x55AA; |