zig-p4: pure-Zig ESP32-P4 toolchain

build.zig generates the linker script and drives Zig's own LLD; tools/image.zig
turns the ELF into a flashable image and tools/{rom,serial}.zig speak the mask
ROM loader over the UART. No CMake, ninja, idf.py, esptool, or external linker.

src/soc.zig is a comptime register model over ESP-IDF's own *_reg.h headers;
src/hal/ adds peripheral sequences; src/io/ implements std.Io for the chip;
src/oracle/ diffs this HAL against ESP-IDF's on the die.

1 files changed, 67 insertions, 0 deletions

diff --git a/captures/zig-tone-chop-chop.json b/captures/zig-tone-chop-chop.json
new file mode 100644
index 0000000..8049e78
--- /dev/null
+++ b/captures/zig-tone-chop-chop.json
@@ -0,0 +1,67 @@
+{
+  "tag": "zig-tone-chop",
+  "mode": "chop",
+  "center_hz": 25000000.0,
+  "rate_hz": 2048000.0,
+  "gain": 19.7,
+  "cmd_on": "T",
+  "cmd_off": "o",
+  "chop_secs": 4.0,
+  "cycles": 4,
+  "guard_s": 0.8,
+  "integration_halfband_hz": 2000.0,
+  "integration_offset_hz": 0.0,
+  "on_segment_db": [
+    5.046,
+    5.298,
+    5.146,
+    4.999
+  ],
+  "off_segment_db": [
+    5.12,
+    5.128,
+    5.014,
+    5.027
+  ],
+  "on_minus_off_db": 0.05,
+  "pooled_sd_db": 0.126,
+  "verdict": "no detection above 3 sd",
+  "marks": [
+    {
+      "t": 242100.648010967,
+      "line": "MARK STATUS carrier=0 divider=410(Q10.8) freq=24975610Hz src=80000000Hz pin=20 cpu_mhz_x1000=89999 t=98510620us"
+    },
+    {
+      "t": 242104.536940576,
+      "line": "MARK TONE_CONTINUOUS_ON gpio20 24975609Hz square t=102406216us"
+    },
+    {
+      "t": 242108.539328207,
+      "line": "MARK TONE_OFF gpio20 released to blink t=106406606us"
+    },
+    {
+      "t": 242112.538504666,
+      "line": "MARK TONE_CONTINUOUS_ON gpio20 24975609Hz square t=110406998us"
+    },
+    {
+      "t": 242116.539028346,
+      "line": "MARK TONE_OFF gpio20 released to blink t=114407349us"
+    },
+    {
+      "t": 242120.537367672,
+      "line": "MARK TONE_CONTINUOUS_ON gpio20 24975609Hz square t=118407744us"
+    },
+    {
+      "t": 242124.538288634,
+      "line": "MARK TONE_OFF gpio20 released to blink t=122408156us"
+    },
+    {
+      "t": 242128.539139364,
+      "line": "MARK TONE_CONTINUOUS_ON gpio20 24975609Hz square t=126408570us"
+    },
+    {
+      "t": 242132.539313173,
+      "line": "MARK TONE_OFF gpio20 released to blink t=130408947us"
+    }
+  ]
+}
\ No newline at end of file