STM32F4-Base/test/host/phasor/phasor_test.c

/*
 * 模块名称：相量层（L2）主机侧单元测试
 * 模块功能：在 PC 上对 App/algo/phasor.c + App/algo/sample_ring.c 做离线验证。
 *
 * 被测对象：真实源文件（以 #include 原样纳入，保证测的是生产代码而非副本）：
 *             ../../../App/algo/phasor.c
 *             ../../../App/algo/sample_ring.c
 *           本层为**纯算法**（无寄存器、无 RTOS、无文件/外设依赖），故**无需任何桩**。
 *
 * 为什么要主机侧单测（而不是只用板端套件）：
 *   1. 相量算法是纯数学变换，与硬件无关；板端**无信号源**，无法注入已知幅值/相位/
 *      频率的标准波形，因而无法验证"读数 = 设定值"这一核心判据（同 L1-3 的替代口径）。
 *      主机侧可合成任意波形，把幅值精度/谐波抑制/频率敏感性一次性钉死。
 *   2. 可精确构造边界：恰好一周波 / 不足一周波 / 环形回绕 / 任意次谐波 / 频偏。
 *   3. 不占 MCU 的 RAM，毫秒级完成。
 *
 * 覆盖点（对应 docs/算法/继电保护功能复现规划.md §3.2）：
 *   TC-PH-001 L2-1 系数表逐项等于 sin(2πk/N)·(√2/N) / cos(2πk/N)·(√2/N)（防转录错）
 *   TC-PH-002 L2-1 系数表精确零点（sin@0,10 / cos@5,15）与归一化 Σcoe² = 1/N
 *   TC-PH-003 L2-3 纯基波：fAmSQ = A/√2（有效值），fAm = √2·fAmSQ（幅值）
 *   TC-PH-004 L2-3/L2-4 实部虚部与相位：atan2(fIm,fRe) = 注入相角
 *   TC-PH-005 直流 + 2/3/5 次谐波被完全滤除（基波读数不变）
 *   TC-PH-006 任意次谐波提取（索引步进 = 谐波次数）：k=2 / k=5
 *   TC-PH-007 频率偏离 50 Hz 的幅值误差（±1 Hz ≤ 1.5%，±2 Hz ≤ 3%，见 §9 Q3）
 *   TC-PH-010 采样环：入环/取窗时序、回绕、饱和、帧计数、参数守卫
 *   TC-PH-020 L2-2 实例层：实例数/实例表/未攒满一周波不产出
 *   TC-PH-021 L2-6 滑动窗：连续滑动 20 拍基波读数恒定
 *   TC-PH-022 L2-7 双区交换：使用区交替 + get 返回**最后一次** run 的结果（非陈旧）
 *
 * 通过：全部 TC PASS（main 返回 0）。
 * 入口：int main(void)，返回 0=PASS / 1=FAIL（由 run 脚本判读）。
 *
 * 创建日期：2026-10-10
 */

#include <math.h>
#include <stdint.h>
#include <stdio.h>

#define PH_PI   3.14159265358979323846
/* 采样率（Hz）：1000 Hz @ 50 Hz → 20 点/周波 */
#define PH_FS   1000.0
#define PH_F0   50.0

/* ===================== 断言 ===================== */
static int s_total = 0, s_passed = 0, s_failed = 0;

#define CHECK(cond, name) do { \
    s_total++; \
    if (cond) { s_passed++; printf("  [PASS] %s\n", name); } \
    else      { s_failed++; printf("  [FAIL] %s  (line %d)\n", name, __LINE__); } \
} while (0)

/* ===================== 被测代码 ===================== */
/* 原样纳入生产源文件（纯算法，无需桩） */
#include "sample_ring.c"
#include "phasor.c"

/* ===================== 工具 ===================== */

/*
 * 函数功能：生成一段正弦窗
 * 入口参数：x     - 输出（长度 >= n）
 *           n     - 点数
 *           amp   - 正弦峰值
 *           f     - 频率（Hz）
 *           phase - 初相（度）
 * 返 回 值：无
 * 限定条件：无
 * 函数说明：以 t = i/PH_FS 采样，即"以当前时刻为终止的前 n 点窗"。
 */
static void gen_sine(float *x, uint8_t n, double amp, double f, double phase) {
    uint8_t i;

    for (i = 0u; i < n; i++) {
        x[i] = (float)(amp * sin(2.0 * PH_PI * f * (double)i / PH_FS + phase * PH_PI / 180.0));
    }
}

/*
 * 函数功能：按时刻 t 构造一整帧（9 路语义通道同值）
 * 入口参数：f     - 输出帧（长度 = ADC_SEM_COUNT）
 *           t     - 采样序号（t/PH_FS 秒）
 *           amp   - 正弦峰值
 *           phase - 初相（度）
 * 返 回 值：无
 * 限定条件：无
 * 函数说明：仅用于驱动实例层/采样环；**不代表真实硬件**（V0.1 上各通道不同刻，
 *          此处只为验证相量层本身）。
 */
static void frame_at(float *f, uint32_t t, double amp, double phase) {
    uint8_t c;
    double  v = amp * sin(2.0 * PH_PI * PH_F0 * (double)t / PH_FS + phase * PH_PI / 180.0);

    for (c = 0u; c < (uint8_t)ADC_SEM_COUNT; c++) {
        f[c] = (float)v;
    }
}

/* ===================== TC-PH-001/002：L2-1 系数表 ===================== */

static void tc_table(void) {
    const double scale = sqrt(2.0) / (double)PHASOR_N;
    double sum_sin = 0.0, sum_cos = 0.0;
    int    ok_sin = 1, ok_cos = 1, ok_norm = 1;
    uint8_t k;

    for (k = 0u; k < (uint8_t)PHASOR_N; k++) {
        double arg = 2.0 * PH_PI * (double)k / (double)PHASOR_N;
        double es = sin(arg) * scale;
        double ec = cos(arg) * scale;

        if (fabs((double)k_fft_sin[k] - es) > 1e-7) { ok_sin = 0; }
        if (fabs((double)k_fft_cos[k] - ec) > 1e-7) { ok_cos = 0; }

        /* 归一化：sin²+cos² = (√2/N)² = 2/N² */
        if (fabs((double)k_fft_sin[k] * (double)k_fft_sin[k]
                 + (double)k_fft_cos[k] * (double)k_fft_cos[k] - 2.0 / (PHASOR_N * PHASOR_N)) > 1e-9) {
            ok_norm = 0;
        }
        sum_sin += (double)k_fft_sin[k] * (double)k_fft_sin[k];
        sum_cos += (double)k_fft_cos[k] * (double)k_fft_cos[k];
    }

    CHECK(ok_sin, "L2-1 coeff sin[k] == sin(2*pi*k/N)*(sqrt2/N) for all k");
    CHECK(ok_cos, "L2-1 coeff cos[k] == cos(2*pi*k/N)*(sqrt2/N) for all k");
    CHECK(ok_norm, "L2-1 per-k sin^2+cos^2 == 2/N^2 (normalization)");
    /* Σsin² = Σcos² = (√2/N)²·(N/2) = 1/N：这就是"fAmSQ 直接是有效值"的根 */
    CHECK(fabs(sum_sin - 1.0 / PHASOR_N) < 1e-7, "L2-1 sum(sin^2) == 1/N (=> RMS, not amplitude)");
    CHECK(fabs(sum_cos - 1.0 / PHASOR_N) < 1e-7, "L2-1 sum(cos^2) == 1/N (=> RMS, not amplitude)");

    CHECK((k_fft_sin[0] == 0.0f) && (k_fft_sin[10] == 0.0f), "L2-1 sin exact zeros at k=0,10");
    CHECK((k_fft_cos[5] == 0.0f) && (k_fft_cos[15] == 0.0f), "L2-1 cos exact zeros at k=5,15");
    CHECK(fabs((double)k_fft_sin[5] - sqrt(2.0) / PHASOR_N) < 1e-7,
          "L2-1 sin[5] == sqrt(2)/N (peak coefficient)");
}

/* ===================== TC-PH-003/004：基波幅值 / 有效值 / 相位 ===================== */

static void tc_fundamental(void) {
    static const struct { double amp; double ph; } k_case[] = {
        { 57.7,     0.0 },
        { 57.7,    30.0 },
        { 57.7,   -45.0 },
        { 100.0,   90.0 },
        { 1.0,      0.0 },
        { 32767.0, 137.0 },
    };
    const unsigned int ncase = (unsigned int)(sizeof(k_case) / sizeof(k_case[0]));
    unsigned int i;
    int ok_rms = 1, ok_amp = 1, ok_ph = 1;
    float x[PHASOR_N];

    for (i = 0u; i < ncase; i++) {
        phasor_t p;
        double   exp_rms = k_case[i].amp / sqrt(2.0);
        double   ph_meas;

        gen_sine(x, (uint8_t)PHASOR_N, k_case[i].amp, PH_F0, k_case[i].ph);
        phasor_calc(x, (uint8_t)PHASOR_N, 1u, &p);

        if (fabs((double)p.fAmSQ - exp_rms) / exp_rms > 0.01) { ok_rms = 0; }
        if (fabs((double)p.fAm - exp_rms * sqrt(2.0)) / (exp_rms * sqrt(2.0)) > 0.01) { ok_amp = 0; }

        ph_meas = atan2((double)p.fIm, (double)p.fRe) * 180.0 / PH_PI;
        if (fabs(ph_meas - k_case[i].ph) > 0.5) {
            printf("         (amp=%.1f ph=%.1f -> measured %.4f)\n",
                   k_case[i].amp, k_case[i].ph, ph_meas);
            ok_ph = 0;
        }
    }

    CHECK(ok_rms, "L2-3 pure fundamental: fAmSQ == A/sqrt(2) (RMS) within 1%");
    CHECK(ok_amp, "L2-3 fAm == sqrt(2)*fAmSQ (amplitude) within 1%");
    CHECK(ok_ph,  "L2-4/L2-3 atan2(fIm,fRe) == injected phase (6 amp/phase cases)");
}

/* ===================== TC-PH-005：直流与谐波被滤除 ===================== */

static void tc_filtering(void) {
    const double amp = 57.7, exp_rms = amp / sqrt(2.0);
    static const struct { double dc, h2, h3, h5; const char *name; } k_case[] = {
        { 0.0,   0.0,   0.0,   0.0,  "pure" },
        { 1.0,   0.0,   0.0,   0.0,  "with 1V DC" },
        { 0.0,   0.0,  30.0,   0.0,  "with 30% 3rd harmonic" },
        { 0.0,   0.0,   0.0,  11.5,  "with 20% 5th harmonic" },
        { 1.0,  20.0,  15.0,  11.5,  "DC + 2nd + 3rd + 5th (doc 6 case)" },
    };
    const unsigned int ncase = (unsigned int)(sizeof(k_case) / sizeof(k_case[0]));
    unsigned int i;
    int ok = 1;
    float x[PHASOR_N];

    for (i = 0u; i < ncase; i++) {
        phasor_t p;
        uint8_t  k;
        double   err;

        for (k = 0u; k < (uint8_t)PHASOR_N; k++) {
            double arg = 2.0 * PH_PI * (double)k / (double)PHASOR_N;
            x[k] = (float)(amp * sin(arg + 30.0 * PH_PI / 180.0)
                           + k_case[i].dc
                           + k_case[i].h2 * sin(2.0 * arg)
                           + k_case[i].h3 * sin(3.0 * arg)
                           + k_case[i].h5 * sin(5.0 * arg));
        }

        phasor_calc(x, (uint8_t)PHASOR_N, 1u, &p);
        err = fabs((double)p.fAmSQ - exp_rms) / exp_rms;
        if (err > 0.01) {
            printf("         (%s -> fAmSQ=%.4f expect=%.4f err=%.3f%%)\n",
                   k_case[i].name, (double)p.fAmSQ, exp_rms, err * 100.0);
            ok = 0;
        }
    }

    CHECK(ok, "L2-3 DC + 2nd/3rd/5th harmonics fully rejected (5 cases, err <= 1%)");
}

/* ===================== TC-PH-006：任意次谐波提取 ===================== */

static void tc_harmonic(void) {
    /* 基波 100 + 二次 25 + 五次 12（峰值）；三根谱线应各自独立读出 */
    static const struct { uint8_t harm; double amp; } k_case[] = {
        { 1u, 100.0 },
        { 2u,  25.0 },
        { 5u,  12.0 },
    };
    const unsigned int ncase = (unsigned int)(sizeof(k_case) / sizeof(k_case[0]));
    unsigned int i;
    int ok = 1;
    float x[PHASOR_N];
    uint8_t k;

    for (k = 0u; k < (uint8_t)PHASOR_N; k++) {
        double arg = 2.0 * PH_PI * (double)k / (double)PHASOR_N;
        x[k] = (float)(100.0 * sin(arg) + 25.0 * sin(2.0 * arg) + 12.0 * sin(5.0 * arg));
    }

    for (i = 0u; i < ncase; i++) {
        phasor_t p;
        double   exp_rms = k_case[i].amp / sqrt(2.0);

        phasor_calc(x, (uint8_t)PHASOR_N, k_case[i].harm, &p);
        if (fabs((double)p.fAmSQ - exp_rms) / exp_rms > 0.01) {
            printf("         (harm=%u -> fAmSQ=%.4f expect=%.4f)\n",
                   (unsigned)k_case[i].harm, (double)p.fAmSQ, exp_rms);
            ok = 0;
        }
    }

    CHECK(ok, "L2-1 harmonic extraction k=1/2/5 from a mixed signal (index step = order)");

    /* 纯基波时谐波轨应≈0（选择性） */
    gen_sine(x, (uint8_t)PHASOR_N, 100.0, PH_F0, 0.0);
    {
        phasor_t p2, p5;
        phasor_calc(x, (uint8_t)PHASOR_N, 2u, &p2);
        phasor_calc(x, (uint8_t)PHASOR_N, 5u, &p5);
        CHECK(((double)p2.fAmSQ < 1e-3) && ((double)p5.fAmSQ < 1e-3),
              "L2-1 pure fundamental leaves 2nd/5th harmonic bins ~0");
    }
}

/* ===================== TC-PH-007：频率敏感性 ===================== */

static void tc_freqdev(void) {
    const double amp = 57.7, exp_rms = amp / sqrt(2.0);
    /* 最坏相角下的幅值误差（实测：±1 Hz ≤1.1%，±2 Hz ≤2.33%；口径见 §9 Q3） */
    static const struct { double f; double limit_pct; } k_case[] = {
        { 50.0, 0.10 },
        { 49.0, 1.50 },
        { 51.0, 1.50 },
        { 48.0, 3.00 },
        { 52.0, 3.00 },
    };
    const unsigned int ncase = (unsigned int)(sizeof(k_case) / sizeof(k_case[0]));
    unsigned int i;
    int ok = 1;
    float x[PHASOR_N];

    for (i = 0u; i < ncase; i++) {
        double worst = 0.0;
        int    ph;

        for (ph = 0; ph < 360; ph += 15) {
            phasor_t p;
            double   err;

            gen_sine(x, (uint8_t)PHASOR_N, amp, k_case[i].f, (double)ph);
            phasor_calc(x, (uint8_t)PHASOR_N, 1u, &p);
            err = fabs((double)p.fAmSQ - exp_rms) / exp_rms * 100.0;
            if (err > worst) { worst = err; }
        }

        printf("         (f=%5.1f Hz worst err over phase = %.2f%%, limit %.2f%%)\n",
               k_case[i].f, worst, k_case[i].limit_pct);
        if (worst > k_case[i].limit_pct) { ok = 0; }
    }

    CHECK(ok, "L2-3 frequency sensitivity: 50Hz<=0.1%, +-1Hz<=1.5%, +-2Hz<=3% (worst phase)");
}

/* ===================== TC-PH-010：采样环 ===================== */

static void tc_ring(void) {
    float   f[ADC_SEM_COUNT];
    float   w[SAMPLE_RING_DEPTH];
    uint8_t c;
    int     i;
    int     ok;

    sample_ring_init();
    CHECK(sample_ring_filled() == 0u, "L2-in ring: init clears fill");
    CHECK(sample_ring_frames() == 0u, "L2-in ring: init clears frame counter");
    CHECK(sample_ring_window(ADC_SEM_UA, 20u, w) == -2, "L2-in ring: window before data -> -2");

    /* 前 3 帧：UA = 100/200/300 */
    ok = 1;
    for (i = 0; i < 3; i++) {
        for (c = 0u; c < (uint8_t)ADC_SEM_COUNT; c++) { f[c] = 0.0f; }
        f[ADC_SEM_UA] = (float)(100 * (i + 1));
        if (sample_ring_push_frame(f, (uint8_t)ADC_SEM_COUNT) != 0) { ok = 0; }
    }
    CHECK(ok, "L2-in ring: 3 frames pushed OK");
    CHECK(sample_ring_filled() == 3u, "L2-in ring: filled == 3");
    CHECK((sample_ring_window(ADC_SEM_UA, 3u, w) == 0)
          && (w[0] == 100.0f) && (w[1] == 200.0f) && (w[2] == 300.0f),
          "L2-in ring: window is chronological (old -> new)");
    /* 通道隔离：其它语义通道不应被 UA 的写入污染 */
    CHECK((sample_ring_window(ADC_SEM_IB, 3u, w) == 0)
          && (w[0] == 0.0f) && (w[1] == 0.0f) && (w[2] == 0.0f),
          "L2-in ring: channels are independent");

    /* 推到 45 帧（> DEPTH=40）→ 回绕 */
    for (i = 3; i < 45; i++) {
        for (c = 0u; c < (uint8_t)ADC_SEM_COUNT; c++) { f[c] = 0.0f; }
        f[ADC_SEM_UA] = (float)i;
        (void)sample_ring_push_frame(f, (uint8_t)ADC_SEM_COUNT);
    }
    CHECK(sample_ring_filled() == SAMPLE_RING_DEPTH, "L2-in ring: fill saturates at DEPTH");
    CHECK(sample_ring_frames() == 45u, "L2-in ring: frame counter is NOT saturated");

    ok = (sample_ring_window(ADC_SEM_UA, 20u, w) == 0);
    for (i = 0; i < 20; i++) { if (w[i] != (float)(25 + i)) { ok = 0; } }
    CHECK(ok, "L2-in ring: wrapped window == last 20 values, in order");

    ok = (sample_ring_window(ADC_SEM_UA, (uint8_t)SAMPLE_RING_DEPTH, w) == 0);
    for (i = 0; i < (int)SAMPLE_RING_DEPTH; i++) { if (w[i] != (float)(5 + i)) { ok = 0; } }
    CHECK(ok, "L2-in ring: full-depth window == last DEPTH values, in order");

    CHECK(sample_ring_window(ADC_SEM_UA, 0u, w) == -1, "L2-in ring: n=0 rejected");
    CHECK(sample_ring_window(ADC_SEM_UA, (uint8_t)(SAMPLE_RING_DEPTH + 1u), w) == -1,
          "L2-in ring: n > DEPTH rejected");
    CHECK(sample_ring_window((adc_semantic_t)ADC_SEM_COUNT, 20u, w) == -1,
          "L2-in ring: out-of-range channel rejected");
    CHECK(sample_ring_window(ADC_SEM_UA, 20u, NULL) == -1, "L2-in ring: NULL out rejected");
    CHECK(sample_ring_push_frame(NULL, (uint8_t)ADC_SEM_COUNT) == -1, "L2-in ring: NULL frame rejected");
    CHECK(sample_ring_push_frame(f, 3u) == -1, "L2-in ring: wrong frame length rejected");
}

/* ===================== TC-PH-020/021/022：实例层 + 滑动窗 + 双区 ===================== */

static void tc_instances(void) {
    const double amp = 100.0, exp_rms = amp / sqrt(2.0);
    float   f[ADC_SEM_COUNT];
    phasor_t p;
    uint32_t t;
    int     ok;
    uint8_t i;

    CHECK(phasor_inst_count() == 5u, "L2-2 instance count == 5");
    CHECK((phasor_inst(0u) != NULL) && (phasor_inst(0u)->name != NULL), "L2-2 instance name available");
    CHECK(phasor_inst((uint8_t)phasor_inst_count()) == NULL, "L2-2 out-of-range instance -> NULL");

    phasor_init();
    CHECK(s_use_zone == 0u, "L2-7 use zone starts at 0");
    CHECK(phasor_get(0u, &p) == -2, "L2-2 no result before a full cycle");
    CHECK(phasor_get((uint8_t)phasor_inst_count(), &p) == -1, "L2-2 out-of-range index -> -1");
    CHECK(phasor_get(0u, NULL) == -1, "L2-2 NULL out -> -1");

    /* 喂 19 帧（不足一周波）→ 仍不产出 */
    for (t = 0u; t < 19u; t++) {
        frame_at(f, t, amp, 0.0);
        (void)sample_ring_push_frame(f, (uint8_t)ADC_SEM_COUNT);
        phasor_run();
    }
    CHECK(phasor_get(0u, &p) == -2, "L2-2 still no result after 19 frames");
    CHECK(s_use_zone == 0u, "L2-7 use zone unchanged while not producing");

    /* 第 20 帧 → 攒满一周波，产出 */
    frame_at(f, 19u, amp, 0.0);
    (void)sample_ring_push_frame(f, (uint8_t)ADC_SEM_COUNT);
    phasor_run();
    CHECK(phasor_get(0u, &p) == 0, "L2-2 result available after 20 frames");
    CHECK(s_use_zone == 1u, "L2-7 use zone toggles to 1 after first production");
    CHECK(fabs((double)p.fAmSQ - exp_rms) / exp_rms < 0.01,
          "L2-2/L2-3 instance 0 (C01-IA-F1) RMS == A/sqrt(2)");
    {
        phasor_t p2, p5;
        int ok_sel = 1;
        if (phasor_get(3u, &p2) != 0) { ok_sel = 0; }
        if (phasor_get(4u, &p5) != 0) { ok_sel = 0; }
        CHECK(ok_sel && ((double)p2.fAmSQ < 1e-3) && ((double)p5.fAmSQ < 1e-3),
              "L2-2 harmonic instances (C04-IA-F2 / C05-IA-F5) ~0 on pure fundamental");
    }

    /* L2-6 滑动窗：继续推 20 帧，每拍重算，基波读数应恒定 */
    ok = 1;
    for (t = 20u; t < 40u; t++) {
        frame_at(f, t, amp, 0.0);
        (void)sample_ring_push_frame(f, (uint8_t)ADC_SEM_COUNT);
        phasor_run();
        if (phasor_get(0u, &p) != 0) { ok = 0; }
        else if (fabs((double)p.fAmSQ - exp_rms) / exp_rms > 0.01) { ok = 0; }
    }
    CHECK(ok, "L2-6 sliding window: RMS constant across 20 consecutive slides");

    /* 实例表一致性：逐实例复核"实例窗 == 独立 phasor_calc 结果" */
    ok = 1;
    for (i = 0u; i < phasor_inst_count(); i++) {
        const phasor_inst_t *d = phasor_inst(i);
        float   win[PHASOR_N];
        phasor_t ref, got;

        if (d == NULL) { ok = 0; break; }
        if (sample_ring_window(d->sem, (uint8_t)PHASOR_N, win) != 0) { ok = 0; break; }
        phasor_calc(win, (uint8_t)PHASOR_N, d->harm, &ref);
        if (phasor_get(i, &got) != 0) { ok = 0; break; }
        if ((ref.fRe != got.fRe) || (ref.fIm != got.fIm) || (ref.fAmSQ != got.fAmSQ)) { ok = 0; break; }
    }
    CHECK(ok, "L2-2/L2-6 instance results == phasor_calc() on the same ring window");
}

/* ===================== TC-PH-022：L2-7 双区指针原子交换 ===================== */

static void tc_dualzone(void) {
    const double amp = 100.0;
    float    f[ADC_SEM_COUNT];
    phasor_t p;
    uint32_t t;
    int      ok;

    /* 1) 使用区逐次产出交替（0 -> 1 -> 0 -> 1） */
    phasor_init();
    for (t = 0u; t < 20u; t++) {
        frame_at(f, t, amp, 0.0);
        (void)sample_ring_push_frame(f, (uint8_t)ADC_SEM_COUNT);
        phasor_run();
    }
    CHECK(s_use_zone == 1u, "L2-7 use zone == 1 after 1st production");

    frame_at(f, 20u, amp, 0.0);
    (void)sample_ring_push_frame(f, (uint8_t)ADC_SEM_COUNT);
    phasor_run();
    CHECK(s_use_zone == 0u, "L2-7 use zone == 0 after 2nd production");

    frame_at(f, 21u, amp, 0.0);
    (void)sample_ring_push_frame(f, (uint8_t)ADC_SEM_COUNT);
    phasor_run();
    CHECK(s_use_zone == 1u, "L2-7 use zone == 1 after 3rd production");

    /* 2) 每拍产出后 get() 必须等于"当前环窗的独立重算"。
     *    幅值每 20 拍切换（100 <-> 10），故"读到陈旧区"会立刻不相等——
     *    连测 60 拍，覆盖两个区的来回切换，比单次比较强得多。 */
    phasor_init();
    ok = 1;
    for (t = 0u; t < 60u; t++) {
        float    win[PHASOR_N];
        phasor_t ref, got;
        double   a = (((t / 20u) % 2u) == 0u) ? amp : (amp / 10.0);

        frame_at(f, t, a, 0.0);
        (void)sample_ring_push_frame(f, (uint8_t)ADC_SEM_COUNT);
        phasor_run();

        if (sample_ring_window(ADC_SEM_IA, (uint8_t)PHASOR_N, win) != 0) {
            continue;   /* 尚未攒满一周波：本拍按契约不产出，无需比较 */
        }
        phasor_calc(win, (uint8_t)PHASOR_N, 1u, &ref);
        if (phasor_get(0u, &got) != 0) { ok = 0; break; }
        if ((ref.fRe != got.fRe) || (ref.fIm != got.fIm) || (ref.fAmSQ != got.fAmSQ)) { ok = 0; break; }
    }
    CHECK(ok, "L2-7 dual-zone: get() == fresh recompute of the live window, all 60 beats");
    CHECK(phasor_get(0u, &p) == 0, "L2-7 result still readable after the sweep");
}

int main(void) {
    printf("=== Phasor Tests ===\n");

    printf("-- L2-1 coefficient table --\n");
    tc_table();
    printf("-- L2-3/L2-4 fundamental amplitude/RMS/phase --\n");
    tc_fundamental();
    printf("-- DC/harmonic rejection --\n");
    tc_filtering();
    printf("-- arbitrary harmonic extraction --\n");
    tc_harmonic();
    printf("-- frequency sensitivity --\n");
    tc_freqdev();
    printf("-- L2 input sample ring --\n");
    tc_ring();
    printf("-- L2-2/L2-6/L2-7 instance layer --\n");
    tc_instances();
    printf("-- L2-7 dual-zone swap --\n");
    tc_dualzone();

    printf("\n=== Phasor Tests: %d/%d PASSED (failed=%d) ===\n",
           s_passed, s_total, s_failed);
    return (s_failed == 0) ? 0 : 1;
}