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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 -- leonerd@leonerd.org.uk |
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package Device::Chip::SDCard; |
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276562
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use strict; |
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use warnings; |
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use base qw( Device::Chip ); |
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our $VERSION = '0.02'; |
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use Data::Bitfield qw( bitfield boolfield ); |
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use Future::Utils qw( repeat ); |
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use constant PROTOCOL => "SPI"; |
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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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my $card = Device::Chip::SDCard->new; |
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$card->mount( Device::Chip::Adapter::...->new )->get; |
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$card->initialise->get; |
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my $bytes = $card->read_block( 0 )->get; |
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print "Read block zero:\n"; |
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printf "%v02X\n", $bytes; |
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=head1 DESCRIPTION |
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40
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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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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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48
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sub SPI_options |
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{ |
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return ( |
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0
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1005
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mode => 0, |
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max_bitrate => 1E6, |
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); |
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} |
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=head1 METHODS |
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The following methods documented with a trailing call to C<< ->get >> return |
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L instances. |
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61
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=cut |
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63
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sub send_command |
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{ |
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0
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my $self = shift; |
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my ( $cmd, $arg, $readlen ) = @_; |
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68
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100
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$arg //= 0; |
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$readlen //= 0; |
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71
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my $crcstop = 0x95; |
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73
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# TODO: until we can perform dynamic transactions with D:C:A we'll have to |
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# do this by presuming the maximum amount of time for the card to respond |
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# (8 words) and look for the response in what's returned |
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77
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$self->protocol->readwrite( |
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pack "C N C a*", 0x40 | $cmd, $arg, $crcstop, "\xFF" x ( 8 + $readlen ), |
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)->then( sub { |
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583
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my ( $resp ) = @_; |
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82
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# Trim to the start of the expected result |
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substr $resp, 0, 7, ""; |
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85
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# Look for a byte with top bit clear |
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while( length $resp ) { |
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my $ret = unpack( "C", $resp ); |
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100
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return Future->done( $ret, unpack "x a$readlen", $resp ) if !( $ret & 0x80 ); |
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90
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substr $resp, 0, 1, ""; |
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} |
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0
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0
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return Future->fail( |
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sprintf "Timed out waiting for response to command %02X", $cmd |
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); |
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}); |
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} |
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98
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sub _recv_data_block |
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{ |
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my $self = shift; |
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my ( $buf, $len ) = @_; |
102
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103
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# Wait for a token |
104
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( repeat { |
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192
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$buf =~ s/^\xFF+//; |
106
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100
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$buf =~ s/^\xFE// and |
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return Future->done(); |
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109
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$self->protocol->readwrite_no_ss( "\xFF" x 16 ) |
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->on_done( sub { $buf .= $_[0] } ); |
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243
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111
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158
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} until => sub { !$_[0]->get } ) |
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# Now want the data + CRC |
113
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->then( sub { |
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600
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length $buf >= $len + 2 and |
115
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return Future->done(); |
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117
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4
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12
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$self->protocol->readwrite_no_ss( "\xFF" x ( $len + 2 - length $buf ) ) |
118
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})->then( sub { |
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518
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$buf .= $_[0]; |
120
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# TODO: might want to verify the CRC? |
121
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4
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Future->done( substr $buf, 0, $len ); |
122
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25
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}); |
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} |
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125
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# Commands |
126
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use constant { |
127
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539
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CMD_GO_IDLE_STATE => 0, |
128
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CMD_SEND_OP_COND => 1, |
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CMD_SEND_CSD => 9, |
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CMD_SET_BLOCKLEN => 16, |
131
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CMD_READ_SINGLE_BLOCK => 17, |
132
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CMD_READ_OCR => 58, |
133
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}; |
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134
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135
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# Response first byte bitflags |
136
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use constant { |
137
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7667
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RESP_PARAM_ERROR => 1<<6, |
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RESP_ADDR_ERROR => 1<<5, |
139
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RESP_ERASESEQ_ERROR => 1<<4, |
140
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RESP_CRC_ERROR => 1<<3, |
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RESP_ILLEGAL_CMD => 1<<2, |
142
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RESP_ERASE_RESET => 1<<1, |
143
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RESP_IDLE => 1<<0, |
144
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}; |
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145
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146
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=head2 initialise |
147
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148
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$card->initialise->get |
149
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150
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Checks that an SD card is present, switches it into SPI mode and waits for its |
151
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initialisation process to complete. |
152
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153
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=cut |
154
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155
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sub initialise |
156
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{ |
157
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1
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1
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1
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148
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my $self = shift; |
158
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159
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# Initialise first by switching the card into SPI mode |
160
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$self->protocol->write( "\xFF" x 10 )->then( sub { |
161
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1
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1
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117
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$self->send_command( CMD_GO_IDLE_STATE ) |
162
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})->then( sub { |
163
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1
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1
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78
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my ( $resp ) = @_; |
164
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1
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3
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$resp == 1 or die "Expected 01 response; got $resp"; |
165
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166
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repeat { |
167
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# TODO: Consider using SEND_IF_COND and doing SDHC initialisation |
168
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2
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106
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$self->send_command( CMD_SEND_OP_COND ); |
169
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} while => sub { |
170
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2
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89
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my $resp = shift->get; |
171
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2
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15
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$resp & RESP_IDLE; |
172
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1
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18
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}, foreach => [ 1 .. 200 ]; |
173
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})->then( sub { |
174
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1
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1
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209
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my ( $resp ) = @_; |
175
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1
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50
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4
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$resp & RESP_IDLE and die "Timed out waiting for card to leave IDLE mode"; |
176
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177
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1
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3
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$self->send_command( CMD_SET_BLOCKLEN, 512 ); |
178
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})->then( sub { |
179
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1
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1
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71
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my ( $resp ) = @_; |
180
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1
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5
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$resp == 0 or die "Expected 00 response; got $resp"; |
181
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182
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1
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3
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Future->done; |
183
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1
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4
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}); |
184
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} |
185
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186
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=head2 size |
187
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188
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$n_bytes = $card->size->get |
189
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190
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Returns the size of the media card in bytes. |
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192
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=cut |
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194
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sub size |
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{ |
196
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0
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0
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1
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0
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my $self = shift; |
197
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198
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$self->read_csd->then( sub { |
199
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0
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0
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0
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my ( $csd ) = @_; |
200
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0
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0
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return Future->done( $csd->{bytes} ); |
201
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0
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0
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}); |
202
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} |
203
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204
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sub _spi_txn |
205
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{ |
206
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4
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4
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11
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my $self = shift; |
207
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4
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7
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my ( $code ) = @_; |
208
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209
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$self->protocol->assert_ss->then( |
210
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$code |
211
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)->followed_by( sub { |
212
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4
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4
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335
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my ( $f ) = @_; |
213
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4
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10
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$self->protocol->release_ss->then( sub { $f } ); |
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4
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435
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214
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4
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13
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}); |
215
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} |
216
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217
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|
|
=head2 read_csd |
218
|
|
|
|
|
|
|
|
219
|
|
|
|
|
|
|
$data = $card->read_csd->get; |
220
|
|
|
|
|
|
|
|
221
|
|
|
|
|
|
|
Returns a C reference containing decoded fields from the SD card's CSD |
222
|
|
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|
|
|
|
("card-specific data") register. |
223
|
|
|
|
|
|
|
|
224
|
|
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|
|
|
|
This hash will contain the following fields: |
225
|
|
|
|
|
|
|
|
226
|
|
|
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|
|
TAAC |
227
|
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|
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|
NSAC |
228
|
|
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|
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TRAN_SPEED |
229
|
|
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|
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|
CCC |
230
|
|
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|
|
|
|
READ_BL_LEN |
231
|
|
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|
|
|
READ_BL_LEN_PARTIAL |
232
|
|
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|
|
|
|
WRITE_BLK_MISALIGN |
233
|
|
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|
|
|
|
READ_BLK_MISALIGN |
234
|
|
|
|
|
|
|
DSR_IMP |
235
|
|
|
|
|
|
|
C_SIZE |
236
|
|
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|
|
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|
VDD_R_CURR_MIN |
237
|
|
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|
|
|
VDD_R_CURR_MAX |
238
|
|
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|
|
|
|
VDD_W_CURR_MIN |
239
|
|
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|
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VDD_W_CURR_MAX |
240
|
|
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|
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|
|
C_SIZE_MULT |
241
|
|
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|
|
|
|
ERASE_BLK_EN |
242
|
|
|
|
|
|
|
SECTOR_SIZE |
243
|
|
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|
|
|
|
WP_GRP_SIZE |
244
|
|
|
|
|
|
|
WP_GRP_ENABLE |
245
|
|
|
|
|
|
|
R2W_FACTOR |
246
|
|
|
|
|
|
|
WRITE_BL_LEN |
247
|
|
|
|
|
|
|
WRITE_BL_PARTIAL |
248
|
|
|
|
|
|
|
FILE_FORMAT_GRP |
249
|
|
|
|
|
|
|
COPY |
250
|
|
|
|
|
|
|
PERM_WRITE_PROTECT |
251
|
|
|
|
|
|
|
TEMP_WRITE_PROTECT |
252
|
|
|
|
|
|
|
FILE_FORMAT |
253
|
|
|
|
|
|
|
|
254
|
|
|
|
|
|
|
The hash will also contain the following calculated fields, derived from the |
255
|
|
|
|
|
|
|
decoded fields above for convenience of calling code. |
256
|
|
|
|
|
|
|
|
257
|
|
|
|
|
|
|
blocks # number of blocks implied by C_SIZE / C_SIZE_MULT |
258
|
|
|
|
|
|
|
bytes # number of bytes of storage, implied by blocks and READ_BL_LEN |
259
|
|
|
|
|
|
|
|
260
|
|
|
|
|
|
|
=cut |
261
|
|
|
|
|
|
|
|
262
|
|
|
|
|
|
|
# This code is most annoying to write as it involves lots of bitwise unpacking |
263
|
|
|
|
|
|
|
# at non-byte boundaries. It's easier (though inefficient) to perform this on |
264
|
|
|
|
|
|
|
# an array of 128 1-bit values |
265
|
|
|
|
|
|
|
sub _bits_to_uint { |
266
|
17
|
|
|
17
|
|
18
|
my $n = 0; |
267
|
17
|
|
|
|
|
64
|
( $n <<= 1 ) |= $_ for reverse @_; |
268
|
17
|
|
|
|
|
63
|
return $n; |
269
|
|
|
|
|
|
|
} |
270
|
|
|
|
|
|
|
|
271
|
|
|
|
|
|
|
my %_DECSCALE = ( |
272
|
|
|
|
|
|
|
1 => 1.0, 2 => 1.2, 3 => 1.3, 4 => 1.5, 5 => 2.0, 6 => 2.5, |
273
|
|
|
|
|
|
|
7 => 3.0, 8 => 3.5, 9 => 4.0, 0xA => 4.5, 0xB => 5.0, |
274
|
|
|
|
|
|
|
0xC => 5.5, 0xD => 6.0, 0xE => 7.0, 0xF => 8.0 |
275
|
|
|
|
|
|
|
); |
276
|
|
|
|
|
|
|
|
277
|
|
|
|
|
|
|
sub _convert_decimal |
278
|
|
|
|
|
|
|
{ |
279
|
2
|
|
|
2
|
|
4
|
my ( $unit, $val ) = @_; |
280
|
|
|
|
|
|
|
|
281
|
2
|
|
|
|
|
13
|
my $mult = $unit % 3; |
282
|
2
|
|
|
|
|
3
|
$unit -= $mult; |
283
|
2
|
|
|
|
|
4
|
$unit /= 3; |
284
|
|
|
|
|
|
|
|
285
|
2
|
|
|
|
|
6
|
$val = $_DECSCALE{$val} * ( 10 ** $mult ); |
286
|
|
|
|
|
|
|
|
287
|
2
|
|
|
|
|
14
|
return $val . substr( "num kMG", $unit + 3, 1 ); |
288
|
|
|
|
|
|
|
} |
289
|
|
|
|
|
|
|
|
290
|
|
|
|
|
|
|
my %_CURRMIN = ( |
291
|
|
|
|
|
|
|
0 => 0.5, 1 => 1, 2 => 5, 3 => 10, |
292
|
|
|
|
|
|
|
4 => 25, 5 => 35, 6 => 60, 7 => 100, |
293
|
|
|
|
|
|
|
); |
294
|
|
|
|
|
|
|
my %_CURRMAX = ( |
295
|
|
|
|
|
|
|
0 => 1, 1 => 5, 2 => 10, 3 => 25, |
296
|
|
|
|
|
|
|
4 => 35, 5 => 45, 6 => 80, 7 => 200, |
297
|
|
|
|
|
|
|
); |
298
|
|
|
|
|
|
|
|
299
|
|
|
|
|
|
|
sub _unpack_csd_v0 |
300
|
|
|
|
|
|
|
{ |
301
|
1
|
|
|
1
|
|
2
|
my ( $bytes ) = @_; |
302
|
1
|
|
|
|
|
25
|
my @bits = reverse split //, unpack "B128", $bytes; |
303
|
|
|
|
|
|
|
|
304
|
|
|
|
|
|
|
my %csd = ( |
305
|
|
|
|
|
|
|
TAAC => _convert_decimal( _bits_to_uint( @bits[112 .. 114] ) - 9, _bits_to_uint( @bits[115 .. 118] ) ) . "s", |
306
|
|
|
|
|
|
|
NSAC => 100*_bits_to_uint( @bits[104 .. 111] ) . "ck", |
307
|
|
|
|
|
|
|
TRAN_SPEED => _convert_decimal( _bits_to_uint( @bits[ 96 .. 98] ) + 5, _bits_to_uint( @bits[ 99 .. 102] ) ) . "bit/s", |
308
|
12
|
|
|
|
|
21
|
CCC => [ grep { $bits[84+$_] } 0 .. 11 ], |
309
|
|
|
|
|
|
|
READ_BL_LEN => 2**_bits_to_uint( @bits[ 80 .. 83] ), |
310
|
|
|
|
|
|
|
READ_BL_LEN_PARTIAL => $bits[79], |
311
|
|
|
|
|
|
|
WRITE_BLK_MISALIGN => $bits[78], |
312
|
|
|
|
|
|
|
READ_BLK_MISALIGN => $bits[77], |
313
|
|
|
|
|
|
|
DSR_IMP => $bits[76], |
314
|
|
|
|
|
|
|
C_SIZE => _bits_to_uint( @bits[ 62 .. 73] ), |
315
|
|
|
|
|
|
|
VDD_R_CURR_MIN => $_CURRMIN{ _bits_to_uint( @bits[ 59 .. 61] ) } . "mA", |
316
|
|
|
|
|
|
|
VDD_R_CURR_MAX => $_CURRMAX{ _bits_to_uint( @bits[ 56 .. 58] ) } . "mA", |
317
|
|
|
|
|
|
|
VDD_W_CURR_MIN => $_CURRMIN{ _bits_to_uint( @bits[ 53 .. 55] ) } . "mA", |
318
|
1
|
|
|
|
|
5
|
VDD_W_CURR_MAX => $_CURRMAX{ _bits_to_uint( @bits[ 50 .. 52] ) } . "mA", |
319
|
|
|
|
|
|
|
C_SIZE_MULT => _bits_to_uint( @bits[ 47 .. 49] ), |
320
|
|
|
|
|
|
|
ERASE_BLK_EN => $bits[46], |
321
|
|
|
|
|
|
|
SECTOR_SIZE => 1+_bits_to_uint( @bits[ 39 .. 45] ), |
322
|
|
|
|
|
|
|
WP_GRP_SIZE => 1+_bits_to_uint( @bits[ 32 .. 38] ), |
323
|
|
|
|
|
|
|
WP_GRP_ENABLE => $bits[31], |
324
|
|
|
|
|
|
|
R2W_FACTOR => 2**_bits_to_uint( @bits[ 26 .. 28] ), |
325
|
|
|
|
|
|
|
WRITE_BL_LEN => 2**_bits_to_uint( @bits[ 22 .. 25] ), |
326
|
|
|
|
|
|
|
WRITE_BL_PARTIAL => $bits[21], |
327
|
|
|
|
|
|
|
FILE_FORMAT_GRP => $bits[15], |
328
|
|
|
|
|
|
|
COPY => $bits[14], |
329
|
|
|
|
|
|
|
PERM_WRITE_PROTECT => $bits[13], |
330
|
|
|
|
|
|
|
TEMP_WRITE_PROTECT => $bits[12], |
331
|
|
|
|
|
|
|
FILE_FORMAT => _bits_to_uint( @bits[ 10 .. 11] ), |
332
|
|
|
|
|
|
|
# Final bits are the CRC, which we ignore |
333
|
|
|
|
|
|
|
); |
334
|
|
|
|
|
|
|
|
335
|
1
|
|
|
|
|
5
|
$csd{blocks} = ( 1 + $csd{C_SIZE} ) * ( 2 ** ( $csd{C_SIZE_MULT} + 2 ) ); |
336
|
1
|
|
|
|
|
3
|
$csd{bytes} = $csd{blocks} * $csd{READ_BL_LEN}; |
337
|
|
|
|
|
|
|
|
338
|
1
|
|
|
|
|
8
|
return \%csd; |
339
|
|
|
|
|
|
|
} |
340
|
|
|
|
|
|
|
|
341
|
|
|
|
|
|
|
sub read_csd |
342
|
|
|
|
|
|
|
{ |
343
|
1
|
|
|
1
|
1
|
136
|
my $self = shift; |
344
|
|
|
|
|
|
|
|
345
|
1
|
|
|
|
|
2
|
my $protocol = $self->protocol; |
346
|
|
|
|
|
|
|
|
347
|
1
|
|
|
|
|
5
|
my $buf; |
348
|
|
|
|
|
|
|
|
349
|
|
|
|
|
|
|
$self->_spi_txn( sub { |
350
|
|
|
|
|
|
|
$protocol->write_no_ss( |
351
|
|
|
|
|
|
|
pack "C N C a*", 0x40 | CMD_SEND_CSD, 0, 0xFF, "\xFF" |
352
|
|
|
|
|
|
|
)->then( sub { |
353
|
1
|
|
|
|
|
96
|
$protocol->readwrite_no_ss( "\xFF" x 8 ) |
354
|
|
|
|
|
|
|
})->then( sub { |
355
|
1
|
|
|
|
|
101
|
( $buf ) = @_; |
356
|
1
|
|
|
|
|
4
|
$buf =~ s/^\xFF*//; |
357
|
1
|
50
|
|
|
|
4
|
$buf =~ s/^\0// or |
358
|
|
|
|
|
|
|
return Future->fail( sprintf "Expected response 00; got %02X to SEND_CSD", ord $buf ); |
359
|
|
|
|
|
|
|
|
360
|
1
|
|
|
|
|
4
|
$self->_recv_data_block( $buf, 16 ); |
361
|
1
|
|
|
1
|
|
113
|
}); |
362
|
|
|
|
|
|
|
})->then( sub { |
363
|
1
|
|
|
1
|
|
57
|
my ( $csd ) = @_; |
364
|
|
|
|
|
|
|
# Top two bits give the structure version |
365
|
1
|
|
|
|
|
1
|
my $ver = vec( $csd, 0, 2 ); |
366
|
1
|
50
|
|
|
|
3
|
if( $ver == 0 ) { |
|
|
0
|
|
|
|
|
|
367
|
1
|
|
|
|
|
3
|
return Future->done( _unpack_csd_v0( $csd ) ); |
368
|
|
|
|
|
|
|
} |
369
|
|
|
|
|
|
|
elsif( $ver == 1 ) { |
370
|
0
|
|
|
|
|
0
|
return Future->done( _unpack_csd_v1( $csd ) ); |
371
|
|
|
|
|
|
|
} |
372
|
|
|
|
|
|
|
else { |
373
|
0
|
|
|
|
|
0
|
return Future->fail( "Bad CSD structure version $ver" ); |
374
|
|
|
|
|
|
|
} |
375
|
1
|
|
|
|
|
12
|
}); |
376
|
|
|
|
|
|
|
} |
377
|
|
|
|
|
|
|
|
378
|
|
|
|
|
|
|
=head2 read_ocr |
379
|
|
|
|
|
|
|
|
380
|
|
|
|
|
|
|
$fields = $card->read_ocr->get |
381
|
|
|
|
|
|
|
|
382
|
|
|
|
|
|
|
Returns a C reference containing decoded fields from the card's OCR |
383
|
|
|
|
|
|
|
("operating conditions register"). |
384
|
|
|
|
|
|
|
|
385
|
|
|
|
|
|
|
This hash will contain the following fields: |
386
|
|
|
|
|
|
|
|
387
|
|
|
|
|
|
|
BUSY |
388
|
|
|
|
|
|
|
CCS |
389
|
|
|
|
|
|
|
UHS_II |
390
|
|
|
|
|
|
|
1V8_ACCEPTED |
391
|
|
|
|
|
|
|
3V5, 3V4, 3V3, ..., 2V7 |
392
|
|
|
|
|
|
|
|
393
|
|
|
|
|
|
|
=cut |
394
|
|
|
|
|
|
|
|
395
|
|
|
|
|
|
|
bitfield OCR => |
396
|
|
|
|
|
|
|
BUSY => boolfield( 31 ), |
397
|
|
|
|
|
|
|
CCS => boolfield( 30 ), |
398
|
|
|
|
|
|
|
UHS_II => boolfield( 29 ), |
399
|
|
|
|
|
|
|
'1V8_ACCEPTED' => boolfield( 24 ), |
400
|
|
|
|
|
|
|
'3V5' => boolfield( 23 ), |
401
|
|
|
|
|
|
|
'3V4' => boolfield( 22 ), |
402
|
|
|
|
|
|
|
'3V3' => boolfield( 21 ), |
403
|
|
|
|
|
|
|
'3V2' => boolfield( 20 ), |
404
|
|
|
|
|
|
|
'3V1' => boolfield( 19 ), |
405
|
|
|
|
|
|
|
'3V0' => boolfield( 18 ), |
406
|
|
|
|
|
|
|
'2V9' => boolfield( 17 ), |
407
|
|
|
|
|
|
|
'2V8' => boolfield( 16 ), |
408
|
|
|
|
|
|
|
'2V7' => boolfield( 15 ); |
409
|
|
|
|
|
|
|
|
410
|
|
|
|
|
|
|
sub read_ocr |
411
|
|
|
|
|
|
|
{ |
412
|
0
|
|
|
0
|
1
|
0
|
my $self = shift; |
413
|
|
|
|
|
|
|
|
414
|
|
|
|
|
|
|
$self->send_command( CMD_READ_OCR, undef, 4 )->then( sub { |
415
|
0
|
|
|
0
|
|
0
|
my ( $resp, $ocr ) = @_; |
416
|
0
|
|
|
|
|
0
|
Future->done( { unpack_OCR( unpack "N", $ocr ) } ); |
417
|
0
|
|
|
|
|
0
|
}); |
418
|
|
|
|
|
|
|
} |
419
|
|
|
|
|
|
|
|
420
|
|
|
|
|
|
|
=head2 read_block |
421
|
|
|
|
|
|
|
|
422
|
|
|
|
|
|
|
$bytes = $card->read_block( $lba )->get |
423
|
|
|
|
|
|
|
|
424
|
|
|
|
|
|
|
Returns a 512-byte bytestring containing data read from the given sector of |
425
|
|
|
|
|
|
|
the card. |
426
|
|
|
|
|
|
|
|
427
|
|
|
|
|
|
|
=cut |
428
|
|
|
|
|
|
|
|
429
|
|
|
|
|
|
|
sub read_block |
430
|
|
|
|
|
|
|
{ |
431
|
3
|
|
|
3
|
1
|
8324
|
my $self = shift; |
432
|
3
|
|
|
|
|
6
|
my ( $lba ) = @_; |
433
|
|
|
|
|
|
|
|
434
|
3
|
|
|
|
|
6
|
my $byteaddr = $lba * 512; |
435
|
|
|
|
|
|
|
|
436
|
3
|
|
|
|
|
14
|
my $protocol = $self->protocol; |
437
|
|
|
|
|
|
|
|
438
|
3
|
|
|
|
|
13
|
my $buf; |
439
|
|
|
|
|
|
|
|
440
|
|
|
|
|
|
|
$self->_spi_txn( sub { |
441
|
|
|
|
|
|
|
$protocol->write_no_ss( |
442
|
|
|
|
|
|
|
pack "C N C a*", 0x40 | CMD_READ_SINGLE_BLOCK, $byteaddr, 0xFF, "\xFF" |
443
|
|
|
|
|
|
|
)->then( sub { |
444
|
3
|
|
|
|
|
303
|
$protocol->readwrite_no_ss( "\xFF" x 8 ); |
445
|
|
|
|
|
|
|
})->then( sub { |
446
|
3
|
|
|
|
|
327
|
( $buf ) = @_; |
447
|
3
|
|
|
|
|
8
|
$buf =~ s/^\xFF*//; |
448
|
3
|
50
|
|
|
|
12
|
$buf =~ s/^\0// or |
449
|
|
|
|
|
|
|
return Future->fail( sprintf "Expected response 00; got %02X to READ_SINGLE_BLOCK", ord $buf ); |
450
|
|
|
|
|
|
|
|
451
|
3
|
|
|
|
|
8
|
$self->_recv_data_block( $buf, 512 ); |
452
|
3
|
|
|
3
|
|
341
|
}); |
453
|
3
|
|
|
|
|
15
|
}); |
454
|
|
|
|
|
|
|
} |
455
|
|
|
|
|
|
|
|
456
|
|
|
|
|
|
|
=head1 TODO |
457
|
|
|
|
|
|
|
|
458
|
|
|
|
|
|
|
=over 4 |
459
|
|
|
|
|
|
|
|
460
|
|
|
|
|
|
|
=item * |
461
|
|
|
|
|
|
|
|
462
|
|
|
|
|
|
|
Support block writing. |
463
|
|
|
|
|
|
|
|
464
|
|
|
|
|
|
|
=item * |
465
|
|
|
|
|
|
|
|
466
|
|
|
|
|
|
|
Support the different initialisation sequence (and block size requirements) of |
467
|
|
|
|
|
|
|
SDHC cards. |
468
|
|
|
|
|
|
|
|
469
|
|
|
|
|
|
|
=back |
470
|
|
|
|
|
|
|
|
471
|
|
|
|
|
|
|
=head1 AUTHOR |
472
|
|
|
|
|
|
|
|
473
|
|
|
|
|
|
|
Paul Evans |
474
|
|
|
|
|
|
|
|
475
|
|
|
|
|
|
|
=cut |
476
|
|
|
|
|
|
|
|
477
|
|
|
|
|
|
|
0x55AA; |