42 lines
1.5 KiB
C
42 lines
1.5 KiB
C
/*
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* ckp_acquisition.h
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*
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* Created on: May 5, 2026
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* Author: herli
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*
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* Translates the CAN-supplied raw CKP offset (B_CKP_OFFSET, RW134 /
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* DAT_0134) into the ROM-equivalent runtime delta dCKP_OFFSET (DAT_0434)
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* and then into the canonical CKP zero-crossing offset CKP_ZERO_OFFSET
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* (DAT_0152). Mirrors ROM FUN_55e0 @ 0x55e0 → FUN_6a4b @ 0x6a4b.
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*/
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#ifndef ADVANCE_CONTROL_CKP_ACQUISITION_H_
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#define ADVANCE_CONTROL_CKP_ACQUISITION_H_
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#include <stdint.h>
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/* Inputs */
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extern int16_t B_CKP_OFFSET; /* RW134 / DAT_0134 — CAN raw input */
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extern uint8_t commitCKP_offset; /* unused for now (commit gate hook) */
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/* Internal RAM trims (DAT_0430 word, DAT_0404 signed byte). No runtime
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* writer was found in this ROM/car (project memory:
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* project_t06235_ckp_processing.md), so they sit at 0 unless a future
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* step wires them up. Exposed for diagnostic poking. */
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extern int16_t CKP_RAM_TRIM_0430;
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extern int8_t CKP_RAM_TRIM_0404;
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/* Outputs */
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extern int16_t dCKP_OFFSET; /* DAT_0434 — output of FUN_55e0 */
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extern int16_t CKP_ZERO_OFFSET; /* DAT_0152 — output of FUN_6a4b */
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/* Recompute dCKP_OFFSET from B_CKP_OFFSET (FUN_55e0), then recompute
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* CKP_ZERO_OFFSET (FUN_6a4b core derivation), then return
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* CKP_ZERO_OFFSET. The commit/flash-persist side-effects (FUN_56d8
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* sequence + DAT_01e7 bit-7) are stubbed via commitCKP_offset for a
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* future wiring step.
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*/
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int16_t get_ckp_zero(void);
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#endif /* ADVANCE_CONTROL_CKP_ACQUISITION_H_ */
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