ReturnCode reader_connect(struct reader *reader,
int beep) {
ReturnCode rc;
if(reader->ftdic == NULL || reader->dev == NULL) {
printf("reader entry null\n");
return RC_NULL_ERROR;
}
if(ftdi_usb_open_dev(reader->ftdic, reader->dev) < 0){
printf("ftdi usb open dev failed\n");
return RC_IO_ERROR;
}
if((rc = reader_reset(reader)) != RC_SUCCESS){
printf("reset failed\n");
ftdi_usb_close(reader->ftdic);
return rc;
}
if((rc = reader_purge(reader)) != RC_SUCCESS){
printf("purge failed\n");
ftdi_usb_close(reader->ftdic);
return rc;
}
if(ftdi_set_baudrate(reader->ftdic, RFID1_BAUDRATE) < 0){
printf("setbaudrate failed\n");
ftdi_usb_close(reader->ftdic);
return RC_IO_ERROR;
}
usleep(10000);
if((rc = reader_ping(reader)) != RC_SUCCESS){
ftdi_usb_close(reader->ftdic);
return rc;
}
reader->connected = 1;
if(beep) {
reader_pass_beep(reader);
}
return RC_SUCCESS;
}
int reader_read(RingReader *reader, unsigned char *buf) {
if (reader->read_index == reader->ring->write_index) {
return 0;
}
CHECK_OVERFLOW;
unsigned int size;
ring_raw_read(reader->ring, (unsigned char*) &size, reader->read_index, sizeof(int));
CHECK_OVERFLOW;
ring_raw_read(reader->ring, buf, reader->read_index + sizeof(int), size);
CHECK_OVERFLOW;
reader->read_index += sizeof(int) + size;
return size;
overflow:
reader_reset(reader);
return READ_OVERFLOW;
}
