PFW-1403 Fix issue where physical MMU buttons do not dismiss error screen

Firmware/mmu2.cpp

@@ -216,7 +216,7 @@ void MMU2::mmu_loop() {
     if (is_mmu_error_monitor_active){
         // Call this every iteration to keep the knob rotation responsive
         // This includes when mmu_loop is called within manage_response
-        ReportErrorHook((uint16_t)lastErrorCode, mmu2.MMUCurrentErrorCode() == ErrorCode::OK ? ErrorSourcePrinter : ErrorSourceMMU);
+        ReportErrorHook((uint16_t)lastErrorCode);
     }
 
     avoidRecursion = false;
@@ -795,7 +795,7 @@ void MMU2::execute_extruder_sequence(const E_Step *sequence, uint8_t steps) {
     }
 }
 
-void MMU2::ReportError(ErrorCode ec, uint8_t res) {
+void MMU2::ReportError(ErrorCode ec, ReportErrorSource res) {
     // Due to a potential lossy error reporting layers linked to this hook
     // we'd better report everything to make sure especially the error states
     // do not get lost. 
@@ -821,13 +821,14 @@ void MMU2::ReportError(ErrorCode ec, uint8_t res) {
         break;
     }
 
-    ReportErrorHook((uint16_t)ec, res);
-
     if( ec != lastErrorCode ){ // deduplicate: only report changes in error codes into the log
         lastErrorCode = ec;
+        lastErrorSource = res;
         LogErrorEvent_P( _O(PrusaErrorTitle(PrusaErrorCodeIndex((uint16_t)ec))) );
     }
 
+    ReportErrorHook((uint16_t)ec);
+
     static_assert(mmu2Magic[0] == 'M' 
         && mmu2Magic[1] == 'M' 
         && mmu2Magic[2] == 'U' 

Firmware/mmu2.h

@@ -73,6 +73,7 @@ public:
     enum ReportErrorSource: uint8_t {
         ErrorSourcePrinter = 0,
         ErrorSourceMMU = 1,
+        ErrorSourceNone = 0xFF,
     };
 
     /// Perform a reset of the MMU
@@ -164,6 +165,9 @@ public:
     /// @returns Current error code
     inline ErrorCode MMUCurrentErrorCode() const { return logic.Error(); }
 
+    /// @returns Last error source
+    inline ReportErrorSource MMULastErrorSource() const { return lastErrorSource; }
+
     /// @returns the version of the connected MMU FW.
     /// In the future we'll return the trully detected FW version
     Version GetMMUFWVersion()const {
@@ -218,7 +222,7 @@ private:
     /// Reports an error into attached ExtUIs
     /// @param ec error code, see ErrorCode
     /// @param res reporter error source, is either Printer (0) or MMU (1)
-    void ReportError(ErrorCode ec, uint8_t res);
+    void ReportError(ErrorCode ec, ReportErrorSource res);
 
     /// Reports progress of operations into attached ExtUIs
     /// @param pc progress code, see ProgressCode
@@ -264,6 +268,7 @@ private:
     
     ProgressCode lastProgressCode = ProgressCode::OK;
     ErrorCode lastErrorCode = ErrorCode::MMU_NOT_RESPONDING;
+    ReportErrorSource lastErrorSource = ReportErrorSource::ErrorSourceNone;
     Buttons lastButton = Buttons::NoButton;
 
     StepStatus logicStepLastStatus;

Firmware/mmu2_reporting.cpp

@@ -216,8 +216,8 @@ enum class ReportErrorHookStates : uint8_t {
 
 enum ReportErrorHookStates ReportErrorHookState = ReportErrorHookStates::RENDER_ERROR_SCREEN;
 
-void ReportErrorHook(uint16_t ec, uint8_t res) {
-    if (mmu2.MMUCurrentErrorCode() == ErrorCode::OK && res == MMU2::ErrorSourceMMU)
+void ReportErrorHook(uint16_t ec) {
+    if (mmu2.MMUCurrentErrorCode() == ErrorCode::OK && mmu2.MMULastErrorSource() == MMU2::ErrorSourceMMU)
     {
         // If the error code suddenly changes to OK, that means
         // a button was pushed on the MMU and the LCD should

Firmware/mmu2_reporting.h

@@ -27,9 +27,8 @@ void EndReport(CommandInProgress cip, uint16_t ec);
  * Render MMU error screen on the LCD. This must be non-blocking
  * and allow the MMU and printer to communicate with each other.
  * @param[in] ec error code
- * @param[in] res reporter error source, is either Printer (0) or MMU (1)
  */
-void ReportErrorHook(uint16_t ec, uint8_t res);
+void ReportErrorHook(uint16_t ec);
 
 /// Called when the MMU sends operation progress update
 void ReportProgressHook(CommandInProgress cip, uint16_t ec);