N64: Add error message if eeprom does not return data

Should prevent problem as described in discussion #857

1 files changed, 16 insertions, 5 deletions

diff --git a/Cart_Reader/N64.ino b/Cart_Reader/N64.ino
index 2aac5bd..dd831f6 100644
--- a/Cart_Reader/N64.ino
+++ b/Cart_Reader/N64.ino
@@ -2256,7 +2256,7 @@ void writeEeprom() {
   }

 }

 

-void readEepromPageList(byte* output, byte page_number, byte page_count) {

+boolean readEepromPageList(byte* output, byte page_number, byte page_count) {

   byte command[] = { 0x04, page_number };

 

   // Disable interrupts for more uniform clock pulses

@@ -2267,7 +2267,12 @@ void readEepromPageList(byte* output, byte page_number, byte page_count) {
     noInterrupts();

     sendJoyBus(command, sizeof(command));

     // XXX: is it possible to read more than 8 bytes at a time ?

-    recvJoyBus(output, 8);

+    if (recvJoyBus(output, 8) > 0) {

+      // If any missing bytes error out

+      interrupts();

+      return 0;

+      break;

+    }

     interrupts();

 

     if (page_count)

@@ -2276,6 +2281,7 @@ void readEepromPageList(byte* output, byte page_number, byte page_count) {
     command[1]++;

     output += 8;

   }

+  return 1;

 }

 

 // Dump Eeprom to SD

@@ -2300,14 +2306,19 @@ void readEeprom() {
     }

 

     for (int i = 0; i < eepPages; i += sizeof(sdBuffer) / 8) {

-      readEepromPageList(sdBuffer, i, sizeof(sdBuffer) / 8);

+      // If any missing bytes error out

+      if (readEepromPageList(sdBuffer, i, sizeof(sdBuffer) / 8) == 0) {

+        println_Msg(F(""));

+        print_STR(error_STR, 0);

+        println_Msg(F("no data received"));

+        println_Msg(F(""));

+        break;

+      }

       // Write 64 pages at once to the SD card

       myFile.write(sdBuffer, sizeof(sdBuffer));

     }

     // Close the file:

     myFile.close();

-    //clear the screen

-    display_Clear();

     print_Msg(F("Saved to "));

     print_Msg(folder);

     println_Msg(F("/"));