have the device give out its own source code

CMakeLists.txt

@@ -84,6 +84,14 @@ target_include_directories(gadget PUBLIC ${CMAKE_CURRENT_LIST_DIR}/st7789/src)
 target_include_directories(gadget PUBLIC ${CMAKE_CURRENT_LIST_DIR}/st7789/interface)
 target_include_directories(gadget PUBLIC ${CMAKE_CURRENT_LIST_DIR}/mcufont/decoder)
 target_include_directories(gadget PUBLIC ${CMAKE_CURRENT_LIST_DIR}/mcufont/fonts)
+target_include_directories(gadget PUBLIC ${CMAKE_CURRENT_LIST_DIR}/build)
+
+# compress source code and stuff we want to include
+add_custom_target(pack bash -c "./pack_data.sh"
+    WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
+    BYPRODUCTS "build/pack_data.h"
+)
+add_dependencies(gadget pack)
 
 # enable generous warnings
 target_compile_options(gadget PUBLIC

include/fat_disk.h

@@ -16,7 +16,7 @@
  * See <http://www.gnu.org/licenses/>.
  */
 
-#define DISK_BLOCK_COUNT 256
+#define DISK_BLOCK_COUNT 300
 #define DISK_BLOCK_SIZE 512
 
 void fat_disk_init(void);

pack_data.sh

@@ -0,0 +1,20 @@
+#!/bin/bash
+set -euo pipefail
+
+cd "$(dirname "$0")"
+echo "Packing data"
+
+mkdir -p build/src
+cp COPYING build/src
+cp README.md build/src
+cp CMakeLists.txt build/src
+cp -r include build/src
+cp -r src build/src
+
+cd build
+rm -rf data.tar data.tar.xz
+tar -f data.tar -c src
+xz -z -9 data.tar
+
+xxd -i data.tar.xz > pack_data.h
+sed -i 's/unsigned/static const unsigned/g' pack_data.h

src/fat_disk.c

@@ -29,6 +29,8 @@
 #include "debug.h"
 #include "fat_disk.h"
 
+#include "pack_data.h"
+
 static uint8_t disk[DISK_BLOCK_COUNT * DISK_BLOCK_SIZE];
 
 void fat_disk_init(void) {
@@ -58,7 +60,8 @@ void fat_disk_init(void) {
         pos += snprintf(readme + pos, 1024 - pos, "\r\n");
         pos += snprintf(readme + pos, 1024 - pos, "Project by Thomas Buck <thomas@xythobuz.de>\r\n");
         pos += snprintf(readme + pos, 1024 - pos, "Licensed under GPLv3.\r\n");
-        pos += snprintf(readme + pos, 1024 - pos, "Source at https://git.xythobuz.de/thomas/sb-py\r\n");
+        pos += snprintf(readme + pos, 1024 - pos, "See included src.tar.xz for sources.\r\n");
+        pos += snprintf(readme + pos, 1024 - pos, "Repo at https://git.xythobuz.de/thomas/sb-py\r\n");
 
         size_t len = strlen(readme);
         UINT bw;
@@ -73,6 +76,35 @@ void fat_disk_init(void) {
         }
     }
 
+    res = f_open(&file, "src.tar.xz", FA_CREATE_ALWAYS | FA_WRITE);
+    if (res != FR_OK) {
+        debug("error: f_open returned %d", res);
+    } else {
+        UINT bw;
+        UINT len = 0;
+        while (1) {
+            debug("write %d", len);
+            res = f_write(&file, data_tar_xz + len, data_tar_xz_len - len, &bw);
+            if (bw == 0) {
+                debug("abort");
+                break;
+            }
+            len += bw;
+            if (res != FR_OK) {
+                debug("error: f_write returned %d", res);
+                break;
+            }
+            if (bw == data_tar_xz_len) {
+                break;
+            }
+        }
+
+        res = f_close(&file);
+        if (res != FR_OK) {
+            debug("error: f_close returned %d", res);
+        }
+    }
+
     if (debug_msc_unmount() != 0) {
         debug("error unmounting disk");
     }