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add : writing on PCF7931 tags

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This commit is contained in:
Dake 2015-08-26 15:53:49 +02:00
parent 5d01f50ae1
commit dc4300bafb
6 changed files with 388 additions and 7 deletions
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88
client/cmdlfpcf7931.c
View file

@ -1,6 +1,7 @@
//-----------------------------------------------------------------------------
// Copyright (C) 2012 Chalk <chalk.secu at gmail.com>
//
// 2015 Dake <thomas.cayrou at gmail.com>
// This code is licensed to you under the terms of the GNU GPL, version 2 or,
// at your option, any later version. See the LICENSE.txt file for the text of
// the license.
@ -21,6 +22,8 @@
static int CmdHelp(const char *Cmd);
struct pcf7931_config configPcf = {{0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF},17500,{0,0}};
int CmdLFPCF7931Read(const char *Cmd)
{
UsbCommand c = {CMD_PCF7931_READ};
@ -30,10 +33,93 @@ int CmdLFPCF7931Read(const char *Cmd)
return 0;
}
int CmdLFPCF7931Config(const char *Cmd)
{
int res = 0;
res = sscanf(Cmd, "%02x %02x %02x %02x %02x %02x %02x %d %d %d", &configPcf.password[0], &configPcf.password[1], &configPcf.password[2], &configPcf.password[3], &configPcf.password[4], &configPcf.password[5], &configPcf.password[6], &configPcf.init_delay, &configPcf.offset[0], &configPcf.offset[1]);
if (res >= 7 || res < 1){
if(res == 7) configPcf.init_delay = 17500; //default value
if(res<=8){
configPcf.offset[0] = -10; //default value
configPcf.offset[1] = 30; //default value
}
if(res < 1){
PrintAndLog("Usage: <password byte 1 (in hex, lsb first)> <password byte 2 (in hex, lsb first)> [...] <password byte 7 (in hex, lsb first)> <tag initialization delay (in us)> <optional : offset on the low pulses width (in us)> <optional : offset on the low pulses position (in us)>");
PrintAndLog("The time offsets could be usefull to correct slew rate generated by the antenna.");
}
PrintAndLog("Current configuration :");
PrintAndLog("Password (LSB first on each byte) : %02x %02x %02x %02x %02x %02x %02x", configPcf.password[0], configPcf.password[1], configPcf.password[2], configPcf.password[3], configPcf.password[4], configPcf.password[5], configPcf.password[6]);
PrintAndLog("Tag initialization delay : %d us", configPcf.init_delay);
PrintAndLog("Offsets : %d us on the low pulses width, %d us on the low pulses positions", configPcf.offset[0], configPcf.offset[1]);
return 0;
}
//default values
configPcf.password[0] = 0xFF;
configPcf.password[1] = 0xFF;
configPcf.password[2] = 0xFF;
configPcf.password[3] = 0xFF;
configPcf.password[4] = 0xFF;
configPcf.password[5] = 0xFF;
configPcf.password[6] = 0xFF;
configPcf.init_delay = 17500;
configPcf.offset[0] = 0;
configPcf.offset[1] = 0;
PrintAndLog("Incorrect format");
PrintAndLog("Examples of right usage : lf pcf7931 config 11 22 33 44 55 66 77 20000");
PrintAndLog(" lf pcf7931 config FF FF FF FF FF FF FF 17500 -10 30");
return 0;
}
int CmdLFPCF7931Write(const char *Cmd)
{
UsbCommand c = {CMD_PCF7931_WRITE};
int res = 0;
res = sscanf(Cmd, "%x %x %x", &c.arg[0], &c.arg[1], &c.arg[2]);
if(res < 1) {
PrintAndLog("Please specify the block address in hex");
return 0;
}
if (res == 1){
PrintAndLog("Please specify the byte address in hex");
return 0;
}
if(res == 2) {
PrintAndLog("Please specify the data in hex (1 byte)");
return 0;
}
if(res == 3) {
uint8_t n=0;
for(n=0;n<7;n++) c.d.asDwords[n] = configPcf.password[n];
c.d.asDwords[7] = (configPcf.offset[0]+128);
c.d.asDwords[8] = (configPcf.offset[1]+128);
c.d.asDwords[9] = configPcf.init_delay;
SendCommand(&c);
return 0;
}
PrintAndLog("INCORRECT FORMAT");
return 0;
}
static command_t CommandTable[] =
{
{"help", CmdHelp, 1, "This help"},
{"read", CmdLFPCF7931Read, 1, "Read content of a PCF7931 transponder"},
{"write", CmdLFPCF7931Write, 1, "Write data on a PCF7931 transponder. Usage : lf pcf7931 write <bloc address> <byte address> <data>"},
{"config", CmdLFPCF7931Config, 1, "Configure the password, the tags initialization delay and time offsets (optional)"},
{NULL, NULL, 0, NULL}
};

13
client/cmdlfpcf7931.h
View file

@ -1,6 +1,7 @@
//-----------------------------------------------------------------------------
// Copyright (C) 2012 Chalk <chalk.secu at gmail.com>
//
// 2015 Dake <thomas.cayrou at gmail.com>
// This code is licensed to you under the terms of the GNU GPL, version 2 or,
// at your option, any later version. See the LICENSE.txt file for the text of
// the license.
@ -11,8 +12,18 @@
#ifndef CMDLFPCF7931_H__
#define CMDLFPCF7931_H__
struct pcf7931_config{
uint8_t password[7];
uint16_t init_delay;
int16_t offset[2];
};
int CmdLFPCF7931(const char *Cmd);
int CmdLFPCF7931Read(const char *Cmd);
int CmdLFPCF7931Write(const char *Cmd);
int CmdLFPCF7931Config(const char *Cmd);
#endif