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/*
* spreadspace avr utils
*
*
* Copyright (C) 2013 Christian Pointner <equinox@spreadspace.org>
* Othmar Gsenger <otti@wirdorange.org>
*
* This file is part of spreadspace avr utils.
*
* spreadspace avr utils is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* any later version.
*
* spreadspace avr utils is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with spreadspace avr utils. If not, see <http://www.gnu.org/licenses/>.
*/
#include "sl018.h"
#include "LUFA/Drivers/Peripheral/TWI.h"
#include <stdio.h>
#include <util/delay.h>
#define SL018_TWI_ADDR 0xA0
#define SL018_TAG_STA_PIN PIND
#define SL018_TAG_STA_BIT 7
#define CARD_PRESENT (!((SL018_TAG_STA_PIN >> SL018_TAG_STA_BIT) & 1))
#define MAX_UID_LEN 7
const char* SL018_cmd_tostring(const uint8_t cmd)
{
switch(cmd) {
case 0x01: return "Select Mifare card";
case 0x02: return "Login to a sector";
case 0x03: return "Read a data block";
case 0x04: return "Write a data block";
case 0x05: return "Read a value block";
case 0x06: return "Initialize a value block";
case 0x07: return "Write master key";
case 0x08: return "Increment value";
case 0x09: return "Decrement value";
case 0x0A: return "Copy value";
case 0x10: return "Read a data page";
case 0x11: return "Write a data page";
case 0x40: return "Control the red led";
case 0xF0: return "Get firmware version";
case 0xFF: return "Reset";
default: return "unknown";
}
}
const char* SL018_status_tostring(const uint8_t status)
{
switch(status) {
case 0x0: return "Operation succeed";
case 0x1: return "No tag";
case 0x2: return "Login succeed";
case 0x3: return "Login fail";
case 0x4: return "Read fail";
case 0x5: return "Write fail";
case 0x6: return "Unable to read after write";
case 0xA: return "Collision occur";
case 0xC: return "Load key fail";
case 0xD: return "Not authenticate";
case 0xE: return "Not a value block";
default: return "unknown";
}
}
const char* SL018_tagtype_tostring(const uint8_t type)
{
switch(type) {
case 0x1: return "Mifare 1k, 4 byte UID";
case 0x2: return "Mifare 1k, 7 byte UID";
case 0x3: return "Mifare Ultralight or NATG203, 7 byte UID";
case 0x4: return "Mifare 4k, 4 byte UID";
case 0x5: return "Mifare 4k, 7 byte UID";
case 0x6: return "Mifare DesFire, 7 byte UID";
default: return "unknown";
}
}
uint8_t SL018_tagtype_to_uidlen(const uint8_t type)
{
switch(type) {
case 0x1:
case 0x4: return 4;
case 0x2:
case 0x3:
case 0x5:
case 0x6: return 7;
default: return 0;
}
}
const uint8_t SL018_CMD_ComSelectCard[] = {1,0x01};
const uint8_t SL018_CMD_ComRedLedOn[] = {2,0x40,1};
const uint8_t SL018_CMD_ComRedLedOff[] = {2,0x40,0};
const uint8_t SL018_CMD_ComGetFirmwareVersion[] = {1,0xF0};
const uint8_t SL018_CMD_ComReset[] = {1,0xFF};
uint8_t twi_recv_buf[256];
typedef struct __attribute__((__packed__))
{
uint8_t len;
uint8_t command;
uint8_t status;
uint8_t data[sizeof(twi_recv_buf)-3];
} sl018_message_t;
sl018_message_t* twi_recv_msg = (sl018_message_t *)&twi_recv_buf;
uint8_t sl018_cmd_raw(const uint8_t* twi_send_buf, bool wait_for_answer)
{
uint8_t pos = 0;
if (TWI_StartTransmission(SL018_TWI_ADDR | TWI_ADDRESS_WRITE,10) == TWI_ERROR_NoError) {
for(pos=0; pos<=twi_send_buf[0]; pos++) {
if( ! TWI_SendByte(twi_send_buf[pos])) {
TWI_StopTransmission();
return 1;
}
}
TWI_StopTransmission();
} else
return 1;
if(!wait_for_answer) return 0;
memset(twi_recv_buf, 0, sizeof(twi_recv_buf));
_delay_ms(50);
if (TWI_StartTransmission(SL018_TWI_ADDR | TWI_ADDRESS_READ,10) == TWI_ERROR_NoError) {
TWI_ReceiveByte(twi_recv_buf, 0);
for(pos=1; pos<=twi_recv_buf[0]; pos++) {
if (! TWI_ReceiveByte(&twi_recv_buf[pos], (pos == twi_recv_buf[0]) ? 1:0 ) ) {
TWI_StopTransmission();
return 1;
}
}
TWI_StopTransmission();
} else
return 1;
return 0;
}
uint8_t sl018_reset(void)
{
if(sl018_cmd_raw(SL018_CMD_ComReset, 0)) {
printf("I2C error\n\r");
return 1;
}
return 0;
}
uint8_t sl018_cmd(const uint8_t* twi_send_buf)
{
if(sl018_cmd_raw(twi_send_buf, 1)) {
printf("I2C error\n\r");
return 1;
} else {
if(twi_recv_msg->len < 2) {
printf("SL018 Cmd,Error: short message received\n\r");
return 1;
}
if(twi_recv_msg->status) {
printf("SL018 Cmd,Error: '%s','%s'\n\r",SL018_cmd_tostring(twi_recv_msg->command),SL018_status_tostring(twi_recv_msg->status));
return 1;
}
sl018_message_t * twi_send_msg = (sl018_message_t *)twi_send_buf;
if(twi_send_msg->command != twi_recv_msg->command) {
printf("SL018 Cmd,Error: mismatch of sent and received command code: %02X,%02X\n\r",twi_send_msg->command,twi_recv_msg->command);
}
}
return 0;
}
void sl018_read_card_uid(uid_t * uid)
{
uid->length=0;
uid->buffer=NULL;
printf( "CARD IN: ");
if(!sl018_cmd(SL018_CMD_ComSelectCard))
{
uint8_t uid_len = twi_recv_msg->len - sizeof(twi_recv_msg->command) - sizeof(twi_recv_msg->status) - 1;
if(uid_len == 255 || uid_len > MAX_UID_LEN) {
printf(" received UID length (%d) is to big for keystore \n\r", uid_len);
return;
}
uint8_t type = twi_recv_msg->data[uid_len];
uint8_t expected_uid_len = SL018_tagtype_to_uidlen(type);
if(expected_uid_len != uid_len) {
printf(" Invalid uid length (%d) for tag type: %s\n\r", uid_len, SL018_tagtype_tostring(type));
return;
}
for (uint8_t pos=0; pos<uid_len; pos++)
printf("%02X",twi_recv_msg->data[uid_len-pos-1]);
printf( ", %s\n\r", SL018_tagtype_tostring(type));
if (0 < type && type < 7) {
uid->length= uid_len;
uid->buffer=twi_recv_msg->data;
} else {
printf("Ignoring unknown card type %02x\n\r",type);
}
}
}
void sl018_set_led(uint8_t on)
{
if(on)
sl018_cmd(SL018_CMD_ComRedLedOn);
else
sl018_cmd(SL018_CMD_ComRedLedOff);
}
uint8_t sl018_check_for_new_card(void)
{
static uint8_t card_status = 0;
if(CARD_PRESENT != card_status) {
card_status = CARD_PRESENT;
if(card_status)
return 1;
}
return 0;
}
unsigned char * sl018_get_firmware_version(void)
{
if(!sl018_cmd(SL018_CMD_ComGetFirmwareVersion)) {
twi_recv_msg->data[sizeof(twi_recv_msg->data) - 1] = 0;
return twi_recv_msg->data;
} else {
return NULL;
}
}
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