openpcd/firmware/src/picc/decoder.h @ master
| 1 | 548ec55e | (no author) | #ifndef _DECODER_H
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| 2 | #define _DECODER_H
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| 3 | |||
| 4 | struct decoder_state; |
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| 5 | |||
| 6 | struct decoder_algo { |
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| 7 | 373c172a | Harald Welte | uint8_t oversampling_rate; |
| 8 | uint8_t bits_per_sampled_char; |
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| 9 | uint32_t bytesample_mask; |
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| 10 | int (*decode_sample)(const uint32_t sample, uint8_t data); |
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| 11 | uint32_t (*get_next_bytesample)(struct decoder_state *st, uint8_t *parity_sample); |
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| 12 | 548ec55e | (no author) | };
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| 13 | |||
| 14 | struct decoder_state { |
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| 15 | struct decoder_algo *algo; |
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| 16 | 373c172a | Harald Welte | uint8_t bit_ofs; |
| 17 | 548ec55e | (no author) | const char *buf; |
| 18 | 373c172a | Harald Welte | const uint32_t *buf32; |
| 19 | 548ec55e | (no author) | };
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| 20 | |||
| 21 | 29d8974f | (no author) | extern int decoder_register(int algnum, struct decoder_algo *algo); |
| 22 | 373c172a | Harald Welte | extern int decoder_decode(uint8_t algo, const char *sample_buf, |
| 23 | 548ec55e | (no author) | int sample_buf_size, char *data_buf); |
| 24 | |||
| 25 | #define DECODER_MILLER 0
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| 26 | #define DECODER_NRZL 1
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| 27 | #define DECODER_NUM_ALGOS 2
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| 28 | |||
| 29 | 29d8974f | (no author) | static struct decoder_algo nrzl_decoder; |
| 30 | static struct decoder_algo miller_decoder; |
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| 31 | 548ec55e | (no author) | |
| 32 | #endif
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