inline void PN532::send(byte d) {
// Serial.print('_');
// Serial.print(d, HEX);
// Serial.print(' ');
wirewrite(d);
chksum += d;
}
void PN532::sendpacket(byte len) {
byte * p = packet;
chksum = 0;
wire.beginTransmission(i2c_addr);
// clk is streched by PN532 to make a pause to resume from power-down
send(PREAMBLE);
send(STARTCODE_1);
send(STARTCODE_2);
send(len + 1);
send(~(len + 1) + 1); // LCS, 1-Packet Length Check Sum
send(HOSTTOPN532); // D4
for (; len > 0; len--) {
send(*p++);
}
wirewrite(~chksum);
wirewrite(POSTAMBLE);
wire.endTransmission();
}
void PN532::send_nack() {
wire.beginTransmission(i2c_addr);
// clk is streched by PN532 to make a pause to resume from power-down
send(PREAMBLE);
send(STARTCODE_1);
send(STARTCODE_2);
send(0xff);
send(0);
wirewrite(POSTAMBLE);
wire.endTransmission();
}
PN532::PN532(byte addr, byte irq, byte rst) :
i2c_addr(addr), pin_irq(irq), pin_rst(rst) {
#elif defined (ARMCMX)
PN532::PN532(I2CBus & wire, byte addr, byte irq, byte rst) :
wire(wire), i2c_addr(addr), pin_irq(irq), pin_rst(rst) {
#endif
if (pin_irq != PIN_NOT_DEFINED) {
pinMode(pin_irq, INPUT);
digitalWrite(pin_irq, HIGH); // pull-up
}
if (pin_rst != PIN_NOT_DEFINED) {
pinMode(pin_rst, OUTPUT);
digitalWrite(pin_rst, HIGH);
}
chksum = 0;
comm_status = IDLE;
last_command = IDLE;
target.IDLength = 0;
}
void PN532::init() {
// Reset the PN532
if (pin_rst != PIN_NOT_DEFINED) {
digitalWrite(pin_rst, LOW);
delay(50);
digitalWrite(pin_rst, HIGH);
delay(150);
}
chksum = 0;
comm_status = IDLE;
last_command = IDLE;
target.IDLength = 0;
}
inline void PN532::send(byte d) {
// Serial.print('_');
// Serial.print(d, HEX);
// Serial.print(' ');
wirewrite(d);
chksum += d;
}
