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Felica.cpp
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Felica.cpp
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#include <Felica.h>
Felica::Felica(PN532 *pn532) { _pn532 = pn532; }
bool Felica::begin() { return _pn532->begin(); }
bool Felica::pn532_send_read(uint8_t cmd, uint8_t *len) {
memmove(2 + FELICA_ID_LENGTH + _buffer, _buffer, *len);
*len += 2 + FELICA_ID_LENGTH; // len + cmd + IDm
_buffer[0] = *len;
_buffer[1] = cmd;
memcpy(2 + _buffer, IDm, FELICA_ID_LENGTH);
if (_pn532->cmd_InDataExchange(_buffer, len)) {
if (_buffer[0] == *len && _buffer[1] == 1 + cmd &&
!memcmp(IDm, 2 + _buffer, FELICA_ID_LENGTH)) {
*len -= 2 + FELICA_ID_LENGTH;
memmove(_buffer, 2 + FELICA_ID_LENGTH + _buffer, *len);
return true;
}
#ifdef FELICA_DEBUG
Serial.println("Unexpected command response");
#endif
}
return false;
}
bool Felica::cmd_Polling() {
uint8_t len;
_buffer[0] = FELICA_CMD_POLLING;
_buffer[1] = 0xFF; // wildcard system code
_buffer[2] = 0xFF; // wildcard system code
_buffer[3] = 0x00; // request code (no request)
_buffer[4] = 0x00; // time slots (1)
len = 5;
if (_pn532->cmd_InListPassiveTarget(PN532_FELICA_212, _buffer, &len)) {
if (_buffer[0] == len &&
2 + 2 * FELICA_ID_LENGTH == len // len + cmd + IDm + PMm
&& _buffer[1] == 1 + FELICA_CMD_POLLING) {
memcpy(IDm, 2 + _buffer, FELICA_ID_LENGTH);
// PMm is also returned but ignored
return true;
}
#ifdef FELICA_DEBUG
Serial.println("Unexpected polling command response");
#endif
}
return false;
}
bool Felica::cmd_RequestSystemCode() {
uint8_t len, idx;
len = 0;
if (pn532_send_read(FELICA_CMD_REQUESTSYSTEMCODE, &len)) {
if (len == 1 + 2 * _buffer[0]) {
if (_buffer[0] > FELICA_MAX_SYSTEMS) {
system_count = FELICA_MAX_SYSTEMS;
#ifdef FELICA_DEBUG
Serial.println("Cannot store all systems info");
#endif
} else {
system_count = _buffer[0];
}
for (idx = 0; idx < system_count; ++idx) {
systems[idx] = (_buffer[1 + 2 * idx] << 8) + _buffer[2 + 2 * idx];
}
return true;
}
#ifdef FELICA_DEBUG
Serial.println("Invalid systems list");
#endif
}
return false;
}
bool Felica::cmd_SearchServiceCode(uint8_t system) {
uint8_t len, attribute;
uint16_t idx, service;
bool is_area;
IDm[0] = (0x0F & IDm[0]) | (system << 4); // upper 4 bits of IDm[0]
service_count = 0;
idx = 0;
while (true) {
_buffer[0] = idx;
_buffer[1] = idx >> 8;
len = 2;
if (!pn532_send_read(FELICA_CMD_SEARCHSERVICECODE, &len)) {
break;
}
service = (_buffer[1] << 8) + _buffer[0]; // little endian
attribute = FELICA_ATTRIBUTE_MASK & service;
is_area = FELICA_AREA_ATTRIBUTE_0 == attribute ||
FELICA_AREA_ATTRIBUTE_1 == attribute;
if (is_area && 4 == len) {
// area information is discarded
#ifdef FELICA_DEBUG
Serial.printf("Found area with range 0x%02X%02X - 0x%02X%02X\r\n",
_buffer[1], _buffer[0], _buffer[3], _buffer[2]);
#endif
} else if (!is_area && 2 == len) {
if (FELICA_SYSTEM_CODE == service) { // end
return true;
}
if (FELICA_MAX_SERVICES == service_count) {
#ifdef FELICA_DEBUG
Serial.println("Cannot store all services info");
#endif
return true;
}
services[service_count] = service;
++service_count;
} else {
#ifdef FELICA_DEBUG
Serial.println("Invalid response to search command");
#endif
break;
}
++idx;
}
return false;
}
bool Felica::cmd_ReadWithoutEncryption(uint8_t service, uint8_t block,
bool *end,
uint8_t data[FELICA_BLOCK_SIZE]) {
uint8_t len;
_buffer[0] = 0x01; // number of services
_buffer[1] = services[service]; // service list: service, little endian
_buffer[2] = services[service] >> 8;
_buffer[3] = 0x01; // number of blocks
_buffer[4] = 0x80; // block list: length (2 bytes), access mode (read),
// service list element
_buffer[5] = block; // block list: block number
len = 6;
if (pn532_send_read(FELICA_CMD_READWITHOUTENCRYPTION, &len)) {
if (3 + FELICA_BLOCK_SIZE ==
len // flag1 + flag2 + number of blocks + block size
&& !_buffer[0] // flag1
&& !_buffer[1] // flag2
&& 0x01 == _buffer[2]) { // number of blocks
memcpy(data, 3 + _buffer, FELICA_BLOCK_SIZE);
*end = false;
return true;
} else if (2 == len && _buffer[0] // flag1
&& FELICA_SERVICE_END_FLAG == _buffer[1]) { // flag2
*end = true;
return true;
}
#ifdef FELICA_DEBUG
Serial.println("Invalid response to read command");
#endif
}
return false;
}
bool Felica::cmd_WriteWithoutEncryption(uint8_t service, uint8_t block,
uint8_t data[FELICA_BLOCK_SIZE]) {
uint8_t len;
_buffer[0] = 0x01; // number of services
_buffer[1] = services[service]; // service list: service, little endian
_buffer[2] = services[service] >> 8;
_buffer[3] = 0x01; // number of blocks
_buffer[4] = 0x80; // block list: length (2 bytes), access mode (write),
// service list element
_buffer[5] = block; // block list: block number
memcpy(6 + _buffer, data, FELICA_BLOCK_SIZE);
len = 6 + FELICA_BLOCK_SIZE;
if (pn532_send_read(FELICA_CMD_WRITEWITHOUTENCRYPTION, &len)) {
if (2 == len // flag1 + flag2
&& !_buffer[0] // flag1
&& !_buffer[1]) { // flag2
return true;
}
#ifdef FELICA_DEBUG
Serial.println("Invalid response to write command");
#endif
}
return false;
}
bool Felica::can_read_service(uint8_t service) {
return FELICA_SERVICE_ATTRIBUTE_NO_ENCRYPTION & services[service];
}
bool Felica::read_service(uint8_t service, uint8_t *len,
uint8_t (*data)[FELICA_BLOCK_SIZE]) {
uint8_t idx;
bool end;
for (idx = 0; idx < *len; ++idx) {
if (!cmd_ReadWithoutEncryption(service, idx, &end, *(data + idx))) {
return false;
}
if (end) {
*len = idx;
return true;
}
}
#ifdef FELICA_DEBUG
Serial.println("Cannot read all blocks");
#endif
return true;
}
bool Felica::write_random_service(uint8_t service, uint8_t len,
uint8_t (*data)[FELICA_BLOCK_SIZE]) {
uint8_t idx;
for (idx = 0; idx < len; ++idx) {
if (!cmd_WriteWithoutEncryption(service, idx, *(data + idx))) {
return false;
}
}
return true;
}