build+tools: fw_content.conf 填 audiod/audio CLI md5; 新增诊断工具 sndprobe(PCM设备探测)/tonepcm2(HW_REFINE能力探测+写计时时钟验证) — 无声定位用。M2.90(0.7.85) 已打包 504bc74b 回验0diff

2026-08-31 22:45:43 +08:00
1 parent ade0a57353
commit 942bdece78
@@ -0,0 +1,82 @@
+/* tonepcm.c — 直开 /dev/snd/pcmC0D0p 写 N 秒正弦并计时（不需要耳朵的 DAC 时钟验证）：
+ * 若写 5s PCM 的墙钟 ≈5s（扣除缓冲），说明硬件时钟在走、DMA 在消费；
+ * 若瞬间返回，说明硬件没在走（静音根因在时钟/电源域，不在数据）。
+ * 用法: tonepcm [sec] [freq]   静态 mipsel。 */
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <time.h>
+#include <sys/ioctl.h>
+#include <sound/asound.h>
+
+static void pmask(struct snd_mask *m, unsigned bit) { m->bits[bit / 32] |= 1u << (bit % 32); }
+static void pivset(struct snd_interval *iv, unsigned val)
+{
+    iv->min = iv->max = val; iv->integer = 1;
+    iv->openmin = iv->openmax = 0; iv->empty = 0;
+}
+static long long now_ms(void)
+{
+    struct timespec ts; clock_gettime(CLOCK_MONOTONIC, &ts);
+    return (long long)ts.tv_sec * 1000 + ts.tv_nsec / 1000000;
+}
+
+int main(int argc, char **argv)
+{
+    int sec = argc > 1 ? atoi(argv[1]) : 5;
+    int freq = argc > 2 ? atoi(argv[2]) : 440;
+    int rate = 44100, ch = 2;
+
+    int fd = open("/dev/snd/pcmC0D0p", O_RDWR);
+    if (fd < 0) { printf("open pcmC0D0p fail\n"); return 1; }
+
+    struct snd_pcm_hw_params p;
+    memset(&p, 0, sizeof p);
+    pmask(&p.masks[SNDRV_PCM_HW_PARAM_ACCESS - SNDRV_PCM_HW_PARAM_FIRST_MASK],
+          SNDRV_PCM_ACCESS_RW_INTERLEAVED);
+    pmask(&p.masks[SNDRV_PCM_HW_PARAM_FORMAT - SNDRV_PCM_HW_PARAM_FIRST_MASK],
+          SNDRV_PCM_FORMAT_S16_LE);
+    pmask(&p.masks[SNDRV_PCM_HW_PARAM_SUBFORMAT - SNDRV_PCM_HW_PARAM_FIRST_MASK],
+          SNDRV_PCM_SUBFORMAT_STD);
+    pivset(&p.intervals[SNDRV_PCM_HW_PARAM_CHANNELS - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL], ch);
+    pivset(&p.intervals[SNDRV_PCM_HW_PARAM_RATE - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL], rate);
+    p.rmask = ~0u;
+    if (ioctl(fd, SNDRV_PCM_IOCTL_HW_PARAMS, &p) != 0) { printf("HW_PARAMS fail\n"); close(fd); return 1; }
+    printf("HW_PARAMS ok (rate interval now [%u,%u])\n",
+           p.intervals[SNDRV_PCM_HW_PARAM_RATE - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL].min,
+           p.intervals[SNDRV_PCM_HW_PARAM_RATE - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL].max);
+    if (ioctl(fd, SNDRV_PCM_IOCTL_PREPARE, 0) != 0) { printf("PREPARE fail\n"); close(fd); return 1; }
+
+    /* 生成 1 秒正弦（整数查表近似：简单累加相位，定点幅度 0.3 满幅） */
+    int frames1s = rate;
+    short *buf = malloc((size_t)frames1s * ch * 2);
+    for (int i = 0; i < frames1s; i++) {
+        /* 粗略正弦：三角波即可（验证用） */
+        int period = rate / freq;
+        int ph = i % period;
+        int v = (ph < period / 2) ? (ph * 4 - period) : (3 * period - ph * 4);
+        short s = (short)(v * 9830 / period);   /* ~0.3 * 32767 */
+        buf[i * 2] = s; buf[i * 2 + 1] = s;
+    }
+
+    long long t0 = now_ms();
+    long long written = 0;
+    for (int s2 = 0; s2 < sec; s2++) {
+        ssize_t w = write(fd, buf, (size_t)frames1s * ch * 2);
+        if (w <= 0) { printf("write fail at sec %d (ret=%zd)\n", s2, w); break; }
+        written += w;
+    }
+    long long el = now_ms() - t0;
+    long long bytes = (long long)sec * frames1s * ch * 2;
+    printf("wrote %lld/%lld bytes in %lld ms (expected ~%d ms if hw clocking; instant = clock dead)\n",
+           written, bytes, el, sec * 1000);
+
+    struct snd_pcm_status st;
+    memset(&st, 0, sizeof st);
+    if (ioctl(fd, SNDRV_PCM_IOCTL_STATUS, &st) == 0)
+        printf("STATUS: state=%d avail=%lu\n", st.state, (unsigned long)st.avail);
+    close(fd);
+    return 0;
+}