1 files changed, 0 insertions, 91 deletions
diff --git a/openpcd/firmware/src/picc/decoder_nrzl.c b/openpcd/firmware/src/picc/decoder_nrzl.c
deleted file mode 100644
index a1b79aa..0000000
--- a/openpcd/firmware/src/picc/decoder_nrzl.c
+++ /dev/null
@@ -1,91 +0,0 @@
-/* ISO 14443 B Rx (PCD->PICC) implementation
- * (C) 2006 by Harald Welte <hwelte@hmw-consulting.de>
- *
- * speed(kbps)	106	212	424	848
- * etu		128/fc	64/fc	32/fc	16/fc
- * etu(usec)	9.4	4.7	2.35	1.18
- *
- * NRZ-L coding with logic level
- *
- * logic 1:	carrier high field amplitude (no modulation)
- * logic 0:	carrier low field amplitude
- *
- * Character transmission format:
- *	start bit:	logic 0
- *	data:		eight bits, lsb first
- *	stop bit	logic 1
- *
- * Frame Format:
- *
- * 		SOF char [EGT char, ...] EOF
- *
- * 	SOF: falling edge, 10..11 etu '0', rising edge in 1etu, 2..3etu '1'
- *	EGT: between 0 and 57uS 
- *	EOF: falling edge, 10..11 etu '0', rising edge in 1etu
- *
- *
- * Sampling
- * - sample once per bit clock, exactly in the middle of it
- * - synchronize CARRIER_DIV TC0 to first falling edge
- * - Configure CARRIER_DIV RA compare (rising edge) to be at
- *   etu/2 carrier clocks.
- * - problem: SOF 12..14etu length, therefore we cannot specify
- *            SOF as full start condition and then sample with 10bit
- *            frames :(
- * 
- */
-
-#include <errno.h>
-#include <sys/types.h>
-#include <os/dbgu.h>
-#include <picc/decoder.h>
-
-/* currently this code will only work with oversampling_rate == 1 */
-#define OVERSAMPLING_RATE 1
-
-static u_int32_t get_next_bytesample(struct decoder_state *st,
-				     u_int8_t *parity_sample)
-{
-	u_int32_t ret = 0;
-	u_int8_t bits_per_sampled_char = st->algo->bits_per_sampled_char;
-	u_int8_t bytesample_mask = st->algo->bytesample_mask;
-
-	/* FIXME: shift start and stop bit into parity_sample and just
-	 * return plain 8-bit data word */
-	
-	/* first part of 10-databit bytesample */
-	ret = (*(st->buf32) >> st->bit_ofs) & bytesample_mask;
-
-	if (st->bit_ofs > 32 - bits_per_sampled_char) {
-		/* second half of 10-databit bytesample */
-		st->buf32++;
-		ret |= (*(st->buf32) << (32 - st->bit_ofs));
-	}
-	st->bit_ofs = (st->bit_ofs + bits_per_sampled_char) % 32;
-
-	return ret & bytesample_mask;
-}
-
-static int nrzl_decode_sample(const u_int32_t sample, u_int8_t *data)
-{
-	*data = (sample >> 1) & 0xff;
-
-	if (!(sample & 0x01)) {
-		DEBUGPCRF("invalid start bit 0!");
-		return -EIO;
-	}
-	if (sample & 0x20) {
-		DEBUGPCRF("invalid stop bit 1!");
-		return -EIO;
-	}
-
-	return 0;
-}
-
-static struct decoder_algo nrzl_decoder = {
-	.oversampling_rate = OVERSAMPLING_RATE,
-	.bits_per_sampled_char = 10 * OVERSAMPLING_RATE,
-	.bytesample_mask = 0x3ff,
-	.decode_sample = &nrzl_decode_sample,
-	.get_next_bytesample = &get_next_bytesample,
-};