99 lines
2.9 KiB
C
99 lines
2.9 KiB
C
#ifndef ECHEM_H
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#define ECHEM_H
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#include <stdint.h>
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#define ECHEM_MAX_POINTS 500
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typedef enum {
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LP_RTIA_200 = 0,
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LP_RTIA_1K,
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LP_RTIA_2K,
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LP_RTIA_4K,
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LP_RTIA_10K,
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LP_RTIA_20K,
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LP_RTIA_40K,
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LP_RTIA_100K,
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LP_RTIA_512K,
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LP_RTIA_COUNT
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} EchemLpRtia;
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typedef struct {
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float v_start; /* mV, cell potential start */
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float v_stop; /* mV, cell potential stop */
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float scan_rate; /* mV/s */
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EchemLpRtia lp_rtia;
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} LSVConfig;
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typedef struct {
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float v_mv; /* mV, applied cell potential */
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float i_ua; /* uA, measured current */
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} LSVPoint;
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typedef struct {
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float v_hold; /* mV, applied cell potential */
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float interval_ms; /* sampling interval */
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float duration_s; /* total duration, 0 = until stopped */
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EchemLpRtia lp_rtia;
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} AmpConfig;
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typedef struct {
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float t_ms; /* timestamp */
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float i_ua; /* uA, measured current */
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} AmpPoint;
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/* Chlorine: multi-step chronoamperometry on Au/Ag */
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typedef struct {
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float v_cond; /* mV, conditioning potential (surface cleaning) */
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float t_cond_ms; /* ms, conditioning duration */
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float v_free; /* mV, free chlorine measurement potential */
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float v_total; /* mV, total chlorine measurement potential */
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float t_dep_ms; /* ms, deposition/settling time per step */
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float t_meas_ms; /* ms, measurement sampling time per step */
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EchemLpRtia lp_rtia;
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} ClConfig;
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#define CL_PHASE_COND 0
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#define CL_PHASE_FREE 1
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#define CL_PHASE_TOTAL 2
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typedef struct {
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float t_ms;
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float i_ua;
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uint8_t phase;
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} ClPoint;
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typedef struct {
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float i_free_ua;
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float i_total_ua;
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} ClResult;
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/* pH: open circuit potentiometry on Au/Ag */
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typedef struct {
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float stabilize_s; /* seconds to wait for OCP stabilization */
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float temp_c; /* temperature for Nernst calculation */
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} PhConfig;
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typedef struct {
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float v_ocp_mv; /* measured OCP: V(SE0) - V(RE0) */
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float ph; /* Nernst-derived pH */
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float temp_c; /* temperature used */
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} PhResult;
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typedef int (*lsv_point_cb_t)(uint16_t idx, float v_mv, float i_ua);
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typedef int (*amp_point_cb_t)(uint16_t idx, float t_ms, float i_ua);
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typedef int (*cl_point_cb_t)(uint16_t idx, float t_ms, float i_ua, uint8_t phase);
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void echem_default_lsv(LSVConfig *cfg);
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void echem_default_amp(AmpConfig *cfg);
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void echem_default_cl(ClConfig *cfg);
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void echem_default_ph(PhConfig *cfg);
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uint32_t echem_lsv_calc_steps(const LSVConfig *cfg, uint32_t max_points);
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int echem_lsv(const LSVConfig *cfg, LSVPoint *out, uint32_t max_points, lsv_point_cb_t cb);
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int echem_amp(const AmpConfig *cfg, AmpPoint *out, uint32_t max_points, amp_point_cb_t cb);
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int echem_chlorine(const ClConfig *cfg, ClPoint *out, uint32_t max_points, ClResult *result, cl_point_cb_t cb);
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int echem_ph_ocp(const PhConfig *cfg, PhResult *result);
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#endif
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