1 //-----------------------------------------------------------------------------
2 // Copyright (C) 2012 Chalk <chalk.secu at gmail.com>
3 // 2015 Dake <thomas.cayrou at gmail.com>
5 // This code is licensed to you under the terms of the GNU GPL, version 2 or,
6 // at your option, any later version. See the LICENSE.txt file for the text of
8 //-----------------------------------------------------------------------------
9 // Low frequency PCF7931 commands
10 //-----------------------------------------------------------------------------
12 #include "cmdlfpcf7931.h"
20 #include "cmdparser.h"
25 static int CmdHelp(const char *Cmd
);
27 #define PCF7931_DEFAULT_INITDELAY 17500
28 #define PCF7931_DEFAULT_OFFSET_WIDTH 0
29 #define PCF7931_DEFAULT_OFFSET_POSITION 0
31 // Default values - Configuration
32 struct pcf7931_config configPcf
= {
33 {0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF},
34 PCF7931_DEFAULT_INITDELAY
,
35 PCF7931_DEFAULT_OFFSET_WIDTH
,
36 PCF7931_DEFAULT_OFFSET_POSITION
39 // Resets the configuration settings to default values.
40 int pcf7931_resetConfig(){
41 memset(configPcf
.Pwd
, 0xFF, sizeof(configPcf
.Pwd
) );
42 configPcf
.InitDelay
= PCF7931_DEFAULT_INITDELAY
;
43 configPcf
.OffsetWidth
= PCF7931_DEFAULT_OFFSET_WIDTH
;
44 configPcf
.OffsetPosition
= PCF7931_DEFAULT_OFFSET_POSITION
;
48 int pcf7931_printConfig(){
49 PrintAndLog("Password (LSB first on bytes) : %s", sprint_hex( configPcf
.Pwd
, sizeof(configPcf
.Pwd
)));
50 PrintAndLog("Tag initialization delay : %d us", configPcf
.InitDelay
);
51 PrintAndLog("Offset low pulses width : %d us", configPcf
.OffsetWidth
);
52 PrintAndLog("Offset low pulses position : %d us", configPcf
.OffsetPosition
);
56 int usage_pcf7931_read(){
57 PrintAndLog("Usage: lf pcf7931 read [h] ");
58 PrintAndLog("This command tries to read a PCF7931 tag.");
59 PrintAndLog("Options:");
60 PrintAndLog(" h This help");
61 PrintAndLog("Examples:");
62 PrintAndLog(" lf pcf7931 read");
66 int usage_pcf7931_write(){
67 PrintAndLog("Usage: lf pcf7931 write [h] <block address> <byte address> <data>");
68 PrintAndLog("This command tries to write a PCF7931 tag.");
69 PrintAndLog("Options:");
70 PrintAndLog(" h This help");
71 PrintAndLog(" blockaddress Block to save [0-7]");
72 PrintAndLog(" byteaddress Index of byte inside block to write [0-15]");
73 PrintAndLog(" data one byte of data (hex)");
74 PrintAndLog("Examples:");
75 PrintAndLog(" lf pcf7931 write 2 1 FF");
79 int usage_pcf7931_config(){
80 PrintAndLog("Usage: lf pcf7931 config [h] [r] <pwd> <delay> <offset width> <offset position>");
81 PrintAndLog("This command tries to set the configuration used with PCF7931 commands");
82 PrintAndLog("The time offsets could be useful to correct slew rate generated by the antenna");
83 PrintAndLog("Caling without some parameter will print the current configuration.");
84 PrintAndLog("Options:");
85 PrintAndLog(" h This help");
86 PrintAndLog(" r Reset configuration to default values");
87 PrintAndLog(" pwd Password, hex, 7bytes, LSB-order");
88 PrintAndLog(" delay Tag initialization delay (in us) decimal");
89 PrintAndLog(" offset Low pulses width (in us) decimal");
90 PrintAndLog(" offset Low pulses position (in us) decimal");
91 PrintAndLog("Examples:");
92 PrintAndLog(" lf pcf7931 config");
93 PrintAndLog(" lf pcf7931 config r");
94 PrintAndLog(" lf pcf7931 config 11223344556677 20000");
95 PrintAndLog(" lf pcf7931 config 11223344556677 17500 -10 30");
99 int CmdLFPCF7931Read(const char *Cmd
){
101 uint8_t ctmp
= param_getchar(Cmd
, 0);
102 if ( ctmp
== 'H' || ctmp
== 'h' ) return usage_pcf7931_read();
105 UsbCommand c
= {CMD_PCF7931_READ
, {0, 0, 0}};
106 clearCommandBuffer();
108 if ( !WaitForResponseTimeout(CMD_ACK
, &resp
, 2500) ) {
109 PrintAndLog("command execution time out");
115 int CmdLFPCF7931Config(const char *Cmd
){
117 uint8_t ctmp
= param_getchar(Cmd
, 0);
118 if ( ctmp
== 0) return pcf7931_printConfig();
119 if ( ctmp
== 'H' || ctmp
== 'h' ) return usage_pcf7931_config();
120 if ( ctmp
== 'R' || ctmp
== 'r' ) return pcf7931_resetConfig();
122 if ( param_gethex(Cmd
, 0, configPcf
.Pwd
, 14) ) return usage_pcf7931_config();
124 configPcf
.InitDelay
= (param_get32ex(Cmd
,1,0,10) & 0xFFFF);
125 configPcf
.OffsetWidth
= (int)(param_get32ex(Cmd
,2,0,10) & 0xFFFF);
126 configPcf
.OffsetPosition
= (int)(param_get32ex(Cmd
,3,0,10) & 0xFFFF);
128 pcf7931_printConfig();
132 int CmdLFPCF7931Write(const char *Cmd
){
134 uint8_t ctmp
= param_getchar(Cmd
, 0);
135 if (strlen(Cmd
) < 1 || ctmp
== 'h' || ctmp
== 'H') return usage_pcf7931_write();
137 uint8_t block
= 0, bytepos
= 0, data
= 0;
139 if ( param_getdec(Cmd
, 0, &block
) ) return usage_pcf7931_write();
140 if ( param_getdec(Cmd
, 1, &bytepos
) ) return usage_pcf7931_write();
142 if ( (block
> 7) || (bytepos
> 15) ) return usage_pcf7931_write();
144 data
= param_get8ex(Cmd
, 2, 0, 16);
146 PrintAndLog("Writing block: %d", block
);
147 PrintAndLog(" pos: %d", bytepos
);
148 PrintAndLog(" data: 0x%02X", data
);
150 UsbCommand c
= {CMD_PCF7931_WRITE
, { block
, bytepos
, data
} };
151 memcpy(c
.d
.asDwords
, configPcf
.Pwd
, sizeof(configPcf
.Pwd
) );
152 c
.d
.asDwords
[7] = (configPcf
.OffsetWidth
+ 128);
153 c
.d
.asDwords
[8] = (configPcf
.OffsetPosition
+ 128);
154 c
.d
.asDwords
[9] = configPcf
.InitDelay
;
156 clearCommandBuffer();
162 static command_t CommandTable
[] =
164 {"help", CmdHelp
, 1, "This help"},
165 {"read", CmdLFPCF7931Read
, 0, "Read content of a PCF7931 transponder"},
166 {"write", CmdLFPCF7931Write
, 0, "Write data on a PCF7931 transponder."},
167 {"config", CmdLFPCF7931Config
, 1, "Configure the password, the tags initialization delay and time offsets (optional)"},
168 {NULL
, NULL
, 0, NULL
}
171 int CmdLFPCF7931(const char *Cmd
)
173 CmdsParse(CommandTable
, Cmd
);
177 int CmdHelp(const char *Cmd
)
179 CmdsHelp(CommandTable
);