STM32F4-Base/test/host/adc_cal/adc_cal_test.c

/*
 * 模块名称：通道标定层（L1.5，adc_cal）主机侧单元测试
 * 被测对象：真实源文件 App/algo/adc_cal.c + App/cfg/cfg_file.c（均 #include
 *           原样纳入——卡 4 的落盘契约必须用真引擎测，不造轮子替身）。
 *           平台依赖桩：dbg_log.h（stub/ 计数宏）、cfg_store_*（本文件内存
 *           虚拟盘，同 cfg_file 套件先例）、syslog_post（计数）、
 *           adc_input_desc()（按 ADC通道映射说明.md 权威表给 V0.1 来源映射）。
 *
 * 为什么必须主机侧（数据可信 §2.6）：板端无标准源，「读数 = 系数 × 码值」
 * 这一根本判据在台架上不可验；Q16 舍入、系数翻倍口径、负零点落盘、合法带
 * 哨兵漏放，只有离线端能用独立推导的期望值 + 坏文件注入一次性钉死。
 *
 * 覆盖点（TC-ADCCAL-xxx；属主登记处 = 本目录，族 TC-HOST-ADCCAL）：
 *   TC-ADCCAL-001  init 注册两段：名称/键数/data_size/无回调/默认表指向
 *   TC-ADCCAL-002  UA（TPAFE）折算：0 / 8192 / 32767 / -32768 对 10V/65536 独立推导
 *   TC-ADCCAL-003  UB（STM32）折算：0 / 2048 / 4095 对 3.3V/4096
 *   TC-ADCCAL-004  其余 6 路各 1 点（合计 8 通道 × ≥3 码值点，卡 2 DoD）
 *   TC-ADCCAL-005  TEMP 透传 + flags/k_uv 恒 0；sem 越界守卫
 *   TC-ADCCAL-006  默认 flags 三态：VALID 全 0；CLIPPED = UB/UC/IB/IC/IN（0xE6）
 *   TC-ADCCAL-007  k_uv 精确值：152.587890625 / 805.6640625（Q16 无舍入验证）
 *   TC-ADCCAL-008  set()：合法带边界含端点 / 越界拒绝 RAM 不动 / TEMP 拒绝
 *   TC-ADCCAL-009  合法带哨兵回退：坏 k/坏 b → ROM 值 + 每通道一次 [ERR] +
 *                  flags 不报 VALID（即便位图置位）+ init 重置观测窗
 *   TC-ADCCAL-014  零点 b 生效（set 路径）：(code+b)×k 逐项可算
 *   TC-ADCCAL-015  两点标定公式：合成数据还原 k/b + 写回往返 + 参数/斜率/
 *                  零点越界（-2）守卫（卡 12 的算术核，台架注入待跑）
 *   TC-ADCCAL-016  rail_ths 门限：TPAFE ±32112 / STM32 4013·81 / TEMP 不监视
 *   TC-ADCCAL-017  init 幂等：重复调用 RAM 复位默认 + 重新注册
 *   —— 以下走真实 cfg_file 引擎（卡 4 DoD）——
 *   TC-ADCCAL-010  文件值生效：k_ua/b_ua 经 load 改变折算结果，VALID 置位
 *   TC-ADCCAL-011  越界文件值：k=999 / k=-999 被引擎收下后由哨兵兜住：
 *                  折算 = ROM、VALID 不报（位图置位也不报）、[ERR] 留痕
 *   TC-ADCCAL-012  段损坏（超长文件）→ 回退 ROM 且 flags 无 VALID（卡 4 DoD）
 *   TC-ADCCAL-013  段缺失（文件无本段）→ ROM 默认、VALID 全 0
 *
 * 通过：全部 TC PASS（main 返回 0）。
 * 创建日期：2026-10-25（道A 卡 2/卡 4）
 */

#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>

/* 先纳入桩头（DBG_* → 计数），再纳入生产源码 */
#include "dbg_log.h"

/* ===================== 内存虚拟文件系统（cfg_store_* 强符号） ===================== */
/* 与 cfg_file 套件同款的最小实现；生产代码经 cfg_file_store.h 做全部文件/堆操作 */

#include "cfg_file_store.h"

#define VFS_CAP 8192u

static uint8_t  s_vfs[VFS_CAP];
static size_t   s_vfs_len = 0u;
static uint32_t s_vfs_mtime = 100u;
static int      s_vfs_exists = 0;

void *cfg_store_alloc(size_t size) { return malloc(size); }
void cfg_store_free(void *p_buf) { free(p_buf); }
uint32_t cfg_store_heap_free(void) { return 0u; }

int cfg_store_read(const char *p_path, uint8_t *p_buf, size_t cap, size_t *p_nread) {
    size_t n;

    (void)p_path;
    if (!s_vfs_exists) {
        return -1;
    }
    n = s_vfs_len;
    if (n > cap) {
        n = cap;
    }
    (void)memcpy(p_buf, s_vfs, n);
    *p_nread = n;
    return 0;
}

int cfg_store_write_atomic(const char *p_path, const uint8_t *p_buf, size_t len) {
    (void)p_path;
    if (len > VFS_CAP) {
        return -1;
    }
    (void)memcpy(s_vfs, p_buf, len);
    s_vfs_len = len;
    s_vfs_exists = 1;
    s_vfs_mtime++;
    return 0;
}

int cfg_store_stat(const char *p_path, cfg_file_stat_t *p_st) {
    (void)p_path;
    if (!s_vfs_exists) {
        return -1;
    }
    p_st->size = (uint32_t)s_vfs_len;
    p_st->mtime = s_vfs_mtime;
    return 0;
}

int cfg_store_remove(const char *p_path) {
    (void)p_path;
    s_vfs_exists = 0;
    s_vfs_len = 0u;
    return 0;
}

const char *cfg_store_config_path(void) { return "/config.ini"; }
const char *cfg_store_tmp_path(void) { return "/config.tmp"; }

/* ---- sys_log 桩：只计数自检留痕 ---- */
#include "sys_log.h"

static int s_syslog_count = 0;

void syslog_post(syslog_id_t id, const char *desc) {
    (void)id;
    (void)desc;
    s_syslog_count++;
}

/* ---- adc_input_desc 桩：V0.1 权威映射（docs/硬件平台/ADC通道映射说明.md §3/§5） ---- */
#include "adc_input.h"

static const adc_channel_desc_t s_desc_stub[ADC_SEM_COUNT] = {
    { ADC_SRC_TPAFE, 6u },   /* UA = buf[6] */
    { ADC_SRC_STM32, 14u },  /* UB = CH14(PC4) */
    { ADC_SRC_STM32, 3u },   /* UC = CH3 */
    { ADC_SRC_TPAFE, 5u },   /* UN = buf[5] */
    { ADC_SRC_TPAFE, 2u },   /* IA = buf[2] */
    { ADC_SRC_STM32, 6u },   /* IB = CH6 */
    { ADC_SRC_STM32, 1u },   /* IC = CH1 */
    { ADC_SRC_STM32, 2u },   /* IN = CH2 */
    { ADC_SRC_STM32, 5u },   /* TEMP = CH5 */
};

const adc_channel_desc_t *adc_input_desc(adc_semantic_t ch) {
    if ((int)ch < 0 || (unsigned)ch >= (unsigned)ADC_SEM_COUNT) {
        return NULL;
    }
    return &s_desc_stub[(unsigned)ch];
}

/* ---- dbg_log 桩观测计数定义（stub/dbg_log.h 声明为 extern） ---- */
int g_caltest_err_count = 0;
int g_caltest_info_count = 0;
int g_caltest_debug_count = 0;

/* ===================== 测试框架（极简，同 cfg_file 套件） ===================== */
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 ===================== */
/* 真实引擎 + 真实标定层（顺序：cfg_file.c 先，其 DBG_TAG 宏被 adc_cal.c 重定义
 * 仅产生主机侧 C4005 告警——MCU 端两者本就在不同 TU，无此现象） */
#include "cfg_file.c"
#include "adc_cal.c"

/* ===================== 独立推导的期望值 ===================== */
/* 期望一律用 **double 直接除**（10/65536、3.3/4096），不引用被测的 Q16 常量，
 * 满足卡 2 DoD「期望值由 LSB 常数独立算得（不是抄实现）」；容差只需盖住
 * float32 中间积舍入（相对 ~1e-7）与打印粒度。 */
static double exp_tpafe(int32_t code) { return (double)code * (10.0 / 65536.0); }
static double exp_stm32(int32_t code) { return (double)code * (3.3 / 4096.0); }
static double exp_q16(int32_t code, int32_t b, int32_t k_q16) {
    return ((double)code + (double)b) * ((double)k_q16 / 65536.0) / 1.0e6;
}
static int near_d(double got, double want) {
    double d = got - want;
    if (d < 0.0) { d = -d; }
    return (d <= 1.0e-4 + (want < 0.0 ? -want : want) * 1.0e-5) ? 1 : 0;
}
static long my_lround(double x) { return (long)((x >= 0.0) ? (x + 0.5) : (x - 0.5)); }

/* ===================== 辅助 ===================== */

/* 复位「引擎注册表 + 虚拟盘 + 全部观测计数」= 刚上电（白盒代价同 cfg_file 套件） */
static void reset_all(void) {
    memset(s_vfs, 0, sizeof(s_vfs));
    s_vfs_len = 0u;
    s_vfs_mtime = 100u;
    s_vfs_exists = 0;
    memset((void *)s_sections, 0, sizeof(s_sections));
    memset(&s_base, 0, sizeof(s_base));
    memset(&s_last, 0, sizeof(s_last));
    s_stable = 0u;
    s_base_valid = 0u;
    g_caltest_err_count = 0;
    g_caltest_info_count = 0;
    g_caltest_debug_count = 0;
    s_syslog_count = 0;
}

static void vfs_put(const char *text) {
    size_t n = strlen(text);
    if (n > VFS_CAP) { n = VFS_CAP; }
    (void)memcpy(s_vfs, text, n);
    s_vfs_len = n;
    s_vfs_exists = 1;
    s_vfs_mtime++;
}

static const char *vfs_get(void) { return (const char *)s_vfs; }

/* ===================== 用例（白盒组） ===================== */

/* TC-ADCCAL-001：init 注册两段（名称/键数/data_size/无回调） */
static void tc_001_init_registers(void) {
    printf("[TC-ADCCAL-001] init registers [adc_cal]/[adc_cal_ofs]\n");
    reset_all();
    adc_cal_init();
    CHECK(s_sections[0].used == 1u, "section slot0 used");
    CHECK(strcmp(s_sections[0].name, "adc_cal") == 0, "sec0 name = adc_cal");
    CHECK(s_sections[0].key_count == 9u, "sec0 keys = 8k + valid");
    CHECK(s_sections[0].data_size == 33u, "sec0 data_size = 33 (covers valid byte)");
    CHECK(s_sections[0].p_cb == NULL, "sec0 no callback (RAM copy = live values)");
    CHECK(s_sections[1].used == 1u && strcmp(s_sections[1].name, "adc_cal_ofs") == 0,
          "sec1 name = adc_cal_ofs");
    CHECK(s_sections[1].key_count == 8u, "sec1 keys = 8b");
    CHECK(s_sections[1].data_size == 32u, "sec1 data_size = 32");
    CHECK(s_sections[2].used == 0u, "only two sections registered");
}

/* TC-ADCCAL-002/003/004：8 通道 × ≥3 码值点折算，期望独立推导（卡 2 DoD） */
static void tc_002_004_apply(void) {
    printf("[TC-ADCCAL-002] UA (TPAFE) apply\n");
    reset_all();
    adc_cal_init();
    CHECK(near_d(adc_cal_apply(ADC_SEM_UA, 0), exp_tpafe(0)), "UA code 0 = 0V");
    CHECK(near_d(adc_cal_apply(ADC_SEM_UA, 8192), exp_tpafe(8192)), "UA 8192 = 1.25V");
    CHECK(near_d(adc_cal_apply(ADC_SEM_UA, 32767), exp_tpafe(32767)), "UA full scale minus 1 (bipolar top code)");
    CHECK(near_d(adc_cal_apply(ADC_SEM_UA, -32768), exp_tpafe(-32768)), "UA -FS (bipolar)");

    printf("[TC-ADCCAL-003] UB (STM32) apply\n");
    CHECK(near_d(adc_cal_apply(ADC_SEM_UB, 0), exp_stm32(0)), "UB code 0 = 0V");
    CHECK(near_d(adc_cal_apply(ADC_SEM_UB, 2048), exp_stm32(2048)), "UB mid = 1.65V");
    CHECK(near_d(adc_cal_apply(ADC_SEM_UB, 4095), exp_stm32(4095)), "UB +FS 3.2992V");

    printf("[TC-ADCCAL-004] other six channels one mid point each\n");
    CHECK(near_d(adc_cal_apply(ADC_SEM_UC, 123), exp_stm32(123)), "UC 123");
    CHECK(near_d(adc_cal_apply(ADC_SEM_UN, -10000), exp_tpafe(-10000)), "UN -10000");
    CHECK(near_d(adc_cal_apply(ADC_SEM_IA, 11452), exp_tpafe(11452)), "IA 11452 (bench first-frame code)");
    CHECK(near_d(adc_cal_apply(ADC_SEM_IB, 4000), exp_stm32(4000)), "IB 4000");
    CHECK(near_d(adc_cal_apply(ADC_SEM_IC, 1), exp_stm32(1)), "IC 1");
    CHECK(near_d(adc_cal_apply(ADC_SEM_IN, 4094), exp_stm32(4094)), "IN 4094");
}

/* TC-ADCCAL-005：TEMP 透传与守卫 */
static void tc_005_temp(void) {
    printf("[TC-ADCCAL-005] TEMP passthrough + guards\n");
    reset_all();
    adc_cal_init();
    CHECK(adc_cal_apply(ADC_SEM_TEMP, 3000) == 3000.0f, "TEMP raw passthrough");
    CHECK(adc_cal_flags(ADC_SEM_TEMP) == 0u, "TEMP flags = 0 (both)");
    CHECK(adc_cal_k_uv(ADC_SEM_TEMP) == 0.0f, "TEMP k_uv = 0");
    CHECK(adc_cal_flags((adc_semantic_t)ADC_SEM_COUNT) == 0u, "flags sem OOB = 0");
    CHECK(adc_cal_set((adc_semantic_t)ADC_SEM_COUNT, 10000000L, 0L) == -1, "set sem OOB rejected");
    CHECK(adc_cal_apply(ADC_SEM_UA, 0) == 0.0f, "UA still applies after guards");
}

/* TC-ADCCAL-006：默认三态位图 */
static void tc_006_default_flags(void) {
    uint32_t vl = 0u, cl = 0u;
    uint8_t i;

    printf("[TC-ADCCAL-006] default flags: no VALID, CLIPPED=0xE6\n");
    reset_all();
    adc_cal_init();
    for (i = 0u; i < 8u; i++) {
        const uint32_t f = adc_cal_flags((adc_semantic_t)i);
        if ((f & ADC_CAL_F_VALID) != 0u) { vl |= (1uL << i); }
        if ((f & ADC_CAL_F_CLIPPED) != 0u) { cl |= (1uL << i); }
    }
    CHECK(vl == 0u, "VALID map = 0x00 (uncalibrated default build)");
    /* bit1 UB, bit2 UC, bit5 IB, bit6 IC, bit7 IN */
    CHECK(cl == ((1uL << 1) | (1uL << 2) | (1uL << 5) | (1uL << 6) | (1uL << 7)),
          "CLIPPED map = UB/UC/IB/IC/IN (0xE6)");
}

/* TC-ADCCAL-007：k_uv 精确值（Q16 无舍入口径） */
static void tc_007_k_uv(void) {
    printf("[TC-ADCCAL-007] k_uv exact (Q16 no-rounding defaults)\n");
    reset_all();
    adc_cal_init();
    CHECK(adc_cal_k_uv(ADC_SEM_UA) > 152.5877f && adc_cal_k_uv(ADC_SEM_UA) < 152.5881f,
          "UA k_uv = 152.587890625");
    CHECK(adc_cal_k_uv(ADC_SEM_UB) > 805.6639f && adc_cal_k_uv(ADC_SEM_UB) < 805.6643f,
          "UB k_uv = 805.6640625");
}

/* TC-ADCCAL-008：set() 合法带边界与拒绝 */
static void tc_008_set(void) {
    float before;

    printf("[TC-ADCCAL-008] set band edges inclusive / rejects leave RAM\n");
    reset_all();
    adc_cal_init();
    CHECK(adc_cal_set(ADC_SEM_UA, 10500000L, -12L) == 0, "set in-band ok");
    CHECK((adc_cal_flags(ADC_SEM_UA) & ADC_CAL_F_VALID) != 0u, "VALID set after accepted");
    CHECK(near_d(adc_cal_apply(ADC_SEM_UA, 1000), exp_q16(1000, -12, 10500000)),
          "apply uses accepted k/b");
    CHECK(adc_cal_set(ADC_SEM_UA, 5000000L, 0L) == 0, "ROM/2 boundary accepted");
    CHECK(adc_cal_set(ADC_SEM_UA, 20000000L, 0L) == 0, "ROM*2 boundary accepted");
    before = adc_cal_apply(ADC_SEM_UA, 100);
    CHECK(adc_cal_set(ADC_SEM_UA, 4999999L, 0L) == -1, "below ROM/2 rejected");
    CHECK(adc_cal_set(ADC_SEM_UA, 20000001L, 0L) == -1, "above ROM*2 rejected");
    CHECK(adc_cal_set(ADC_SEM_UA, 10000000L, 8193L) == -1, "b +8193 rejected");
    CHECK(adc_cal_set(ADC_SEM_UA, 10000000L, -8193L) == -1, "b -8193 rejected");
    CHECK(adc_cal_set(ADC_SEM_TEMP, 10000000L, 0L) == -1, "TEMP rejected");
    CHECK(adc_cal_apply(ADC_SEM_UA, 100) == before, "RAM untouched after all rejects");
}

/* TC-ADCCAL-009：合法带哨兵（白盒直写 RAM 模拟引擎收到坏值） */
static void tc_009_sanitize(void) {
    double want;

    printf("[TC-ADCCAL-009] band sentinel: ROM fallback + one-shot ERR + no VALID\n");
    reset_all();
    adc_cal_init();
    s_kcfg.k[0] = 30000000L;      /* > ROM*2：模拟坏文件/坏标定已写入 RAM */
    s_kcfg.valid |= 0x01u;        /* 位图也说「已标定」——更要用哨兵兜住 */
    want = exp_tpafe(1000);
    CHECK(near_d(adc_cal_apply(ADC_SEM_UA, 1000), want), "out-of-band k falls back to ROM");
    CHECK((adc_cal_flags(ADC_SEM_UA) & ADC_CAL_F_VALID) == 0u, "VALID suppressed while k out of band");
    CHECK(g_caltest_err_count == 1, "first bad observation logs exactly one ERR");
    (void)adc_cal_apply(ADC_SEM_UA, 2000);
    (void)adc_cal_apply(ADC_SEM_UA, 3000);
    CHECK(g_caltest_err_count == 1, "repeat observations do not spam ERR");
    /* b 越界同哨兵（k 合法、b 坏） */
    s_bcfg.b[1] = 99999L;
    CHECK(near_d(adc_cal_apply(ADC_SEM_UB, 1000), exp_stm32(1000)), "bad b -> ROM + b=0");
    CHECK(g_caltest_err_count == 2, "bad b noted on its own channel");
    /* init 重置留痕位 = 新观测窗 */
    adc_cal_init();
    CHECK(adc_cal_k_uv(ADC_SEM_UA) > 152.5f && s_kcfg.valid == 0u, "init restores ROM + clear valid");
    /* stub 计数器是测试侧累计量，init 不清它——用增量断言 */
    {
        const int e0 = g_caltest_err_count;
        s_kcfg.k[0] = 30000000L;
        (void)adc_cal_apply(ADC_SEM_UA, 1);
        CHECK(g_caltest_err_count == e0 + 1, "ERR window restarts after init (delta 1)");
    }
}

/* TC-ADCCAL-014：b 生效（经 set 正规路径） */
static void tc_00a_b_effect(void) {
    printf("[TC-ADCCAL-014] zero offset b via set path\n");
    reset_all();
    adc_cal_init();
    CHECK(adc_cal_set(ADC_SEM_IA, 10000000L, -77L) == 0, "set IA b=-77");
    CHECK(near_d(adc_cal_apply(ADC_SEM_IA, 1077), exp_q16(1077, -77, 10000000)),
          "IA apply = (code-77)*ROMk");
}

/* TC-ADCCAL-015：两点标定公式 + 写回往返 */
static void tc_00b_two_point(void) {
    int32_t kq = 0, bb = 0;
    const int32_t k0 = 10000000L;
    const int32_t b0 = -30L;
    int32_t c1 = -250, c2 = 32000;
    int32_t v1, v2;
    int rc;

    printf("[TC-ADCCAL-015] two-point formula recovers synthetic k/b\n");
    /* 合成测量：v = (c + b0) * k0/65536 µV（lround 模拟量化读数） */
    v1 = (int32_t)my_lround(((double)c1 + (double)b0) * ((double)k0 / 65536.0));
    v2 = (int32_t)my_lround(((double)c2 + (double)b0) * ((double)k0 / 65536.0));
    rc = adc_cal_two_point(c1, c2, v1, v2, &kq, &bb);
    CHECK(rc == 0, "two_point ok");
    CHECK(kq > (k0 - 5) && kq < (k0 + 5), "k recovered within +-5 q16");
    CHECK(bb > (b0 - 3) && bb < (b0 + 3), "b recovered within +-3 codes");
    /* 写回往返：set 后 apply(c2) 应还原 v2（µV 级） */
    reset_all();
    adc_cal_init();
    CHECK(adc_cal_set(ADC_SEM_UA, kq, bb) == 0, "set recovered coeffs");
    CHECK(near_d(adc_cal_apply(ADC_SEM_UA, c2), (double)v2 / 1.0e6), "roundtrip v(c2) = measured");

    printf("[TC-ADCCAL-015] two_point guards\n");
    CHECK(adc_cal_two_point(100, 100, 0L, 100000L, &kq, &bb) == -1, "dc=0 rejected");
    CHECK(adc_cal_two_point(100, 200, 50000L, 50000L, &kq, &bb) == -1, "dv=0 rejected");
    CHECK(adc_cal_two_point(100, 200, 100000L, 50000L, &kq, &bb) == -1, "inverted slope rejected");
    CHECK(adc_cal_two_point(100, 200, 0L, 1000L, NULL, &bb) == -1, "NULL k rejected");
    CHECK(adc_cal_two_point(100, 200, 0L, 1000L, &kq, NULL) == -1, "NULL b rejected");
    /* 真零点 +9000 码 > B_MAX：斜率对但 b 越界 -> -2（先查前端，不用系数凑） */
    v1 = (int32_t)my_lround((100.0 + 9000.0) * ((double)k0 / 65536.0));
    v2 = (int32_t)my_lround((2000.0 + 9000.0) * ((double)k0 / 65536.0));
    CHECK(adc_cal_two_point(100, 2000, v1, v2, &kq, &bb) == -2, "b beyond +-8192 -> -2");
}

/* TC-ADCCAL-016：贴轨门限表 */
static void tc_00c_rail_ths(void) {
    int32_t lo = 0, hi = 0;

    printf("[TC-ADCCAL-016] rail thresholds by source\n");
    CHECK(adc_cal_rail_ths(ADC_SEM_UA, &lo, &hi) == 0 && hi == 32112L && lo == -32112L,
          "TPAFE band = +-98% half-FS");
    CHECK(adc_cal_rail_ths(ADC_SEM_UB, &lo, &hi) == 0 && hi == 4013L && lo == 81L,
          "STM32 band = 98%/2% of 4095");
    CHECK(adc_cal_rail_ths(ADC_SEM_TEMP, &lo, &hi) == -1, "TEMP not rail-watched");
    CHECK(adc_cal_rail_ths(ADC_SEM_UA, NULL, &hi) == -1, "NULL guard");
}

/* TC-ADCCAL-017：init 幂等 */
static void tc_00d_idempotent(void) {
    printf("[TC-ADCCAL-017] re-init restores defaults\n");
    reset_all();
    adc_cal_init();
    (void)adc_cal_set(ADC_SEM_UA, 12345678L, 5L);
    CHECK(near_d(adc_cal_apply(ADC_SEM_UA, 1000), exp_q16(1000, 5, 12345678)), "pre-check tuned");
    adc_cal_init();   /* 幂等重入：RAM 复位 + 再注册 */
    CHECK(near_d(adc_cal_apply(ADC_SEM_UA, 1000), exp_tpafe(1000)), "re-init back to ROM");
    CHECK(adc_cal_flags(ADC_SEM_UA) == 0u, "re-init clears VALID too");
}

/* ===================== 用例（引擎集成组，卡 4 DoD） ===================== */

/* TC-ADCCAL-010：文件值经 load 生效 + VALID */
static void tc_010_file_apply(void) {
    printf("[TC-ADCCAL-010] file values applied via cfg_file_load\n");
    reset_all();
    adc_cal_init();
    vfs_put("[adc_cal]\r\nk_ua=12000000\r\nvalid=1\r\n"
            "[adc_cal_ofs]\r\nb_ua=-40\r\n");
    CHECK(cfg_file_load() == 0, "load ok");
    CHECK(adc_cal_k_uv(ADC_SEM_UA) > 183.105f && adc_cal_k_uv(ADC_SEM_UA) < 183.106f,
          "UA k = 12000000 q16 = 183.10546875 uV");
    CHECK(near_d(adc_cal_apply(ADC_SEM_UA, 6557), exp_q16(6557, -40, 12000000)),
          "apply uses file k and negative file b");
    CHECK((adc_cal_flags(ADC_SEM_UA) & ADC_CAL_F_VALID) != 0u, "VALID from file bitmap");
    /* 未列键保留默认 */
    CHECK(adc_cal_k_uv(ADC_SEM_UB) > 805.663f && adc_cal_k_uv(ADC_SEM_UB) < 805.665f,
          "UB untouched keeps ROM");
}

/* TC-ADCCAL-011：越界文件值由哨兵兜住（含位图说谎） */
static void tc_011_file_bad(void) {
    printf("[TC-ADCCAL-011] out-of-band file k -> sentinel ROM fallback, VALID denied\n");
    reset_all();
    adc_cal_init();
    vfs_put("[adc_cal]\r\nk_ua=999\r\nk_ub=-999\r\nvalid=7\r\n");
    CHECK(cfg_file_load() == 0, "load ok (values structurally valid INT)");
    CHECK(near_d(adc_cal_apply(ADC_SEM_UA, 500), exp_tpafe(500)), "UA sanitized to ROM");
    CHECK(near_d(adc_cal_apply(ADC_SEM_UB, 500), exp_stm32(500)), "UB sanitized to ROM");
    CHECK(adc_cal_flags(ADC_SEM_UA) == 0u, "UA VALID denied despite bitmap bit (k out of band)");
    CHECK(adc_cal_flags(ADC_SEM_UB) == ADC_CAL_F_CLIPPED, "UB keeps only CLIPPED");
    CHECK(g_caltest_err_count >= 2, "both sanitizations logged");
}

/* TC-ADCCAL-012：段损坏（超长文件）→ 回退默认且 flags 无 VALID（卡 4 DoD 原句） */
static void tc_012_file_corrupt(void) {
    char big[CFG_FILE_MAX_LEN + 64];
    size_t i;

    printf("[TC-ADCCAL-012] oversized corrupt file -> ROM defaults + no VALID\n");
    reset_all();
    adc_cal_init();
    /* 先把有效值 + valid 位图写入 RAM（模拟曾标定过），再用超长文件触发引擎复位 */
    (void)adc_cal_set(ADC_SEM_UA, 11000000L, 3L);
    for (i = 0u; i < (sizeof(big) - 1u); i++) {
        big[i] = 'A';
    }
    big[sizeof(big) - 1u] = '\0';
    vfs_put(big);
    CHECK(cfg_file_load() == 0, "load survives corruption");
    CHECK(near_d(adc_cal_apply(ADC_SEM_UA, 4096), exp_tpafe(4096)), "corrupt -> ROM coefficients");
    CHECK(adc_cal_flags(ADC_SEM_UA) == 0u, "corrupt -> no VALID anywhere (DoD wording)");
    CHECK(s_syslog_count >= 1, "corruption left self-test trail");
}

/* TC-ADCCAL-013：段缺失 → 引擎默认（=ROM），VALID 全 0 */
static void tc_013_section_missing(void) {
    printf("[TC-ADCCAL-013] missing sections -> factory ROM, vl=0\n");
    reset_all();
    adc_cal_init();
    vfs_put("; only a comment, no managed sections\n");
    CHECK(cfg_file_load() == 0, "load ok with unrelated file");
    CHECK(near_d(adc_cal_apply(ADC_SEM_IN, 2048), exp_stm32(2048)), "IN still ROM");
    CHECK(adc_cal_flags(ADC_SEM_IA) == 0u, "no VALID with missing sections");
}

/* ===================== main ===================== */
int main(void) {
    printf("=== ADC Cal Layer Tests ===\n");

    tc_001_init_registers();
    tc_002_004_apply();
    tc_005_temp();
    tc_006_default_flags();
    tc_007_k_uv();
    tc_008_set();
    tc_009_sanitize();
    tc_00a_b_effect();
    tc_00b_two_point();
    tc_00c_rail_ths();
    tc_00d_idempotent();
    tc_010_file_apply();
    tc_011_file_bad();
    tc_012_file_corrupt();
    tc_013_section_missing();

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