From 6006fd39d7aab31ede4a1157c4ddb1dd91443c8c Mon Sep 17 00:00:00 2001
From: Martin Brodbeck <martin@brodbeck-online.de>
Date: Tue, 6 Feb 2024 22:11:58 +0100
Subject: [PATCH] WIP

---
 CMakeLists.txt |  6 ++++--
 pico_keyer.cpp |  9 ++++++---
 settings.cpp   | 19 +++++++++++++++++++
 settings.h     | 22 ++++++++++++++++++++++
 4 files changed, 51 insertions(+), 5 deletions(-)
 create mode 100644 settings.cpp
 create mode 100644 settings.h

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3ddc800..9afff99 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -35,7 +35,6 @@ pico_enable_stdio_usb(pico_keyer 0)
 
 # Add the standard library to the build
 target_link_libraries(pico_keyer
-  hardware_flash
   pico_stdlib)
 
 # Add the standard include files to the build
@@ -46,7 +45,10 @@ target_include_directories(pico_keyer PRIVATE
 
 # Add any user requested libraries
 target_link_libraries(pico_keyer 
-        )
+  hardware_flash
+  hardware_exception
+  pico_flash
+)
 
 pico_add_extra_outputs(pico_keyer)
 
diff --git a/pico_keyer.cpp b/pico_keyer.cpp
index 7ee3990..ae63bde 100644
--- a/pico_keyer.cpp
+++ b/pico_keyer.cpp
@@ -1,15 +1,18 @@
 #include <stdio.h>
 #include "pico/stdlib.h"
-#include "hardware/flash.h"
 
-namespace {
-    static uint16_t PAGE_SIZE{256};
+#include "settings.h"
+
+namespace
+{
+
 }
 
 int main()
 {
     stdio_init_all();
 
+    sleep_ms(1000);
 
     puts("Hello, world!");
 
diff --git a/settings.cpp b/settings.cpp
new file mode 100644
index 0000000..ee492c8
--- /dev/null
+++ b/settings.cpp
@@ -0,0 +1,19 @@
+#include "settings.h"
+
+namespace
+{
+    const size_t PAGE_SIZE{256};
+    const size_t NVS_SIZE{4096};
+    const uint32_t FLASH_WRITE_START = PICO_FLASH_SIZE_BYTES - NVS_SIZE;
+}
+
+void flash_store_callback(void *settings)
+{
+    flash_range_erase(FLASH_WRITE_START, NVS_SIZE);
+    flash_range_program(FLASH_WRITE_START, (const uint8_t *)settings, PAGE_SIZE);
+}
+
+void store_settings(Settings &settings)
+{
+    flash_safe_execute(flash_store_callback, (void *)&settings, 1000);
+}
\ No newline at end of file
diff --git a/settings.h b/settings.h
new file mode 100644
index 0000000..e52417a
--- /dev/null
+++ b/settings.h
@@ -0,0 +1,22 @@
+#ifndef SETTINGS_H
+#define SETTINGS_H
+
+#include "pico/flash.h"
+
+enum class Mode
+{
+    IAMBIC_A,
+    IAMBIC_B,
+    // ULTIMATE
+};
+
+struct Settings
+{
+    Mode mode{Mode::IAMBIC_B};
+};
+
+void store_settings(Settings &settings);
+
+
+
+#endif
\ No newline at end of file