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Diffstat (limited to 'firmware/src/picc/decoder.h')
-rw-r--r--firmware/src/picc/decoder.h32
1 files changed, 32 insertions, 0 deletions
diff --git a/firmware/src/picc/decoder.h b/firmware/src/picc/decoder.h
new file mode 100644
index 0000000..aef0e20
--- /dev/null
+++ b/firmware/src/picc/decoder.h
@@ -0,0 +1,32 @@
+#ifndef _DECODER_H
+#define _DECODER_H
+
+struct decoder_state;
+
+struct decoder_algo {
+ u_int8_t oversampling_rate;
+ u_int8_t bits_per_sampled_char;
+ u_int32_t bytesample_mask;
+ int (*decode_sample)(const u_int32_t sample, u_int8_t data);
+ u_int32_t (*get_next_bytesample)(struct decoder_state *st, u_int8_t *parity_sample);
+};
+
+struct decoder_state {
+ struct decoder_algo *algo;
+ u_int8_t bit_ofs;
+ const char *buf;
+ const u_int32_t *buf32;
+};
+
+extern int decoder_register(int algnum, struct decoder_algo *algo);
+extern int decoder_decode(u_int8_t algo, const char *sample_buf,
+ int sample_buf_size, char *data_buf);
+
+#define DECODER_MILLER 0
+#define DECODER_NRZL 1
+#define DECODER_NUM_ALGOS 2
+
+static struct decoder_algo nrzl_decoder;
+static struct decoder_algo miller_decoder;
+
+#endif
personal git repositories of Harald Welte. Your mileage may vary