Add X42 as EEPROM reset command + handling + visualization

MMU-193

src/application.cpp

@@ -2,12 +2,13 @@
 #include "application.h"
 #include "registers.h"
 
-#include "modules/leds.h"
-#include "modules/globals.h"
-#include "modules/user_input.h"
 #include "modules/finda.h"
 #include "modules/fsensor.h"
+#include "modules/globals.h"
+#include "modules/leds.h"
+#include "modules/permanent_storage.h"
 #include "modules/serial.h"
+#include "modules/user_input.h"
 
 #include "logic/command_base.h"
 #include "logic/cut_filament.h"
@@ -179,6 +180,51 @@ void Application::ReportWriteRegister(const mp::RequestMsg &rq) {
     modules::serial::WriteToUSART(rsp, len);
 }
 
+/// Performs a blocking (!) LED "snake" from one side to the other and back.
+/// Intended only for visualization of EEPROM reset, not to be used in while the MMU is running normally
+namespace EEPROMResetVis {
+
+static void Delay(){
+    uint32_t start = mt::timebase.Millis();
+    while( ! mt::timebase.Elapsed(start, 100) ){
+        ml::leds.Step();
+    }
+}
+
+static void __attribute__((noinline)) Green(uint8_t i){
+    ml::leds.SetPairButOffOthers(i, ml::on, ml::off);
+    Delay();
+}
+
+static void __attribute__((noinline)) Red(uint8_t i){
+    ml::leds.SetPairButOffOthers(i, ml::on, ml::off);
+    Delay();
+}
+
+static void Run(){
+    for(uint8_t i = 0; i < ml::leds.LedPairsCount(); ++i){
+        Green(i);
+        Red(i);
+    }
+    for(uint8_t i = ml::leds.LedPairsCount(); i != 0; --i){
+        Red(i);
+        Green(i);
+    }
+}
+
+} // namespace EEPROMResetVis
+
+void Application::ProcessReset(uint8_t resetType){
+    switch(resetType){
+    case 42: // perform an EEPROM reset if the resetType == The Answer to the Ultimate Question of Life, the Universe, and Everything :)
+        mps::EraseAll();
+        EEPROMResetVis::Run();
+        [[fallthrough]];
+    default: // anything else "just" restarts the board
+        hal::cpu::Reset();
+    }
+}
+
 void Application::ProcessRequestMsg(const mp::RequestMsg &rq) {
     switch (rq.code) {
     case mp::RequestMsgCodes::Button:
@@ -196,7 +242,7 @@ void Application::ProcessRequestMsg(const mp::RequestMsg &rq) {
         break;
     case mp::RequestMsgCodes::Reset:
         // immediately reset the board - there is no response in this case
-        hal::cpu::Reset();
+        ProcessReset(rq.value);
         break;
     case mp::RequestMsgCodes::Version:
     case mp::RequestMsgCodes::Read:

src/application.h

@@ -46,6 +46,7 @@ private:
     void ReportReadRegister(const mp::RequestMsg &rq);
     void ReportWriteRegister(const mp::RequestMsg &rq);
     void ProcessRequestMsg(const mp::RequestMsg &rq);
+    void ProcessReset(uint8_t resetType);
 
     uint16_t lastCommandProcessedMs;