From 8da5ff98869d5027a12c3d8bd49edb578f296b71 Mon Sep 17 00:00:00 2001
From: Ian Gulliver <github@flamingcow.io>
Date: Sun, 12 Apr 2026 21:47:12 +0900
Subject: [PATCH] A/B partition table, embed in both firmware targets

---
 firmware/CMakeLists.txt       |  2 ++
 firmware/partition_table.json | 37 +++++++++++++++++++++++++++++++++++
 2 files changed, 39 insertions(+)
 create mode 100644 firmware/partition_table.json

diff --git a/firmware/CMakeLists.txt b/firmware/CMakeLists.txt
index fa4b055..c8ba148 100644
--- a/firmware/CMakeLists.txt
+++ b/firmware/CMakeLists.txt
@@ -35,6 +35,7 @@ math(EXPR VERSION_MAJOR "${BUILD_EPOCH} >> 16")
 math(EXPR VERSION_MINOR "${BUILD_EPOCH} & 65535")
 pico_set_binary_version(picomap MAJOR ${VERSION_MAJOR} MINOR ${VERSION_MINOR})
 target_compile_definitions(picomap PRIVATE BUILD_EPOCH=${BUILD_EPOCH})
+pico_embed_pt_in_binary(picomap ${CMAKE_CURRENT_LIST_DIR}/partition_table.json)
 pico_add_extra_outputs(picomap)
 target_link_libraries(picomap ${LIB_DEPS})
 
@@ -47,5 +48,6 @@ pico_enable_stdio_uart(picomap_test 0)
 pico_set_binary_type(picomap_test copy_to_ram)
 pico_set_binary_version(picomap_test MAJOR ${VERSION_MAJOR} MINOR ${VERSION_MINOR})
 target_compile_definitions(picomap_test PRIVATE BUILD_EPOCH=${BUILD_EPOCH})
+pico_embed_pt_in_binary(picomap_test ${CMAKE_CURRENT_LIST_DIR}/partition_table.json)
 pico_add_extra_outputs(picomap_test)
 target_link_libraries(picomap_test ${LIB_DEPS})
diff --git a/firmware/partition_table.json b/firmware/partition_table.json
new file mode 100644
index 0000000..24e3928
--- /dev/null
+++ b/firmware/partition_table.json
@@ -0,0 +1,37 @@
+{
+  "version": [1, 0],
+  "unpartitioned": {
+    "families": ["absolute"],
+    "permissions": {
+      "secure": "rw",
+      "nonsecure": "rw",
+      "bootloader": "rw"
+    }
+  },
+  "partitions": [
+    {
+      "name": "A",
+      "id": 0,
+      "start": "0K",
+      "size": "512K",
+      "families": ["rp2350-arm-s"],
+      "permissions": {
+        "secure": "rw",
+        "nonsecure": "rw",
+        "bootloader": "rw"
+      },
+      "link": ["a", 1]
+    },
+    {
+      "name": "B",
+      "start": "512K",
+      "size": "512K",
+      "families": ["rp2350-arm-s"],
+      "permissions": {
+        "secure": "rw",
+        "nonsecure": "rw",
+        "bootloader": "rw"
+      }
+    }
+  ]
+}