[iec] disable interrupts during EOI detect

Author: idolpx

include/cbm_defines.h

@@ -189,6 +189,7 @@ typedef enum
 #define TIMING_EMPTY    512     // SIGNAL EMPTY STREAM
 #define TIMEOUT_ATNCLK  70      // WAIT FOR CLK AFTER ATN IS PULLED
 #define TIMEOUT_Ttlta   65      // TALKER/LISTENER TURNAROUND TIMEOUT
+#define TIMING_Ttcp     13      // TALKER TURNAROUND CLOCK PULL
 
 // SPECIAL
 #define TIMING_PROTOCOL_DETECT   218  // SAUCEDOS/JIFFYDOS CAPABLE DELAY

lib/bus/iec/protocol/cpbstandardserial.cpp

@@ -138,8 +138,9 @@ uint8_t CPBStandardSerial::receiveByte()
     // will  do  nothing.    The  listener  should  be  watching,  and  if  200  microseconds  pass
     // without  the Clock line going to true, it has a special task to perform: note EOI.
 
-    IEC.pull ( PIN_IEC_SRQ );
+    //IEC.pull ( PIN_IEC_SRQ );
     //if ( timeoutWait ( PIN_IEC_CLK_IN, PULLED, TIMING_Tye, false ) == TIMING_Tye )
+    portDISABLE_INTERRUPTS();
     timer_start( TIMING_Tye );
     while ( IEC.status(PIN_IEC_CLK_IN) != PULLED )
     {
@@ -173,18 +174,22 @@ uint8_t CPBStandardSerial::receiveByte()
 
         // Wait for clock line to be pulled
         //timeoutWait ( PIN_IEC_CLK_IN, PULLED, TIMING_Tye, false );
-        //usleep( 2 );
+        // IEC.pull( PIN_IEC_SRQ );
+        // usleep( 1 );
+        // IEC.release( PIN_IEC_SRQ );
+        // usleep( 1 );
     }
     timer_stop();
-    IEC.release ( PIN_IEC_SRQ );
+    portENABLE_INTERRUPTS();
+    //IEC.release ( PIN_IEC_SRQ );
 
 
     // Has ATN status changed?
     if ( atn_status != IEC.status ( PIN_IEC_ATN ) )
     {
         Debug_printv ( "ATN status changed!" );
         IEC.flags |= ATN_PULLED;
-        return 0; // return error because timeout
+        return 0;
     }
 
 

lib/device/iec/fuji.cpp

@@ -139,9 +139,8 @@ device_state_t iecFuji::process()
 
     if (commanddata.channel != CHANNEL_COMMAND)
     {
-        Debug_printf("Meatloaf device only accepts on channel 15. Sending NOTFOUND.\r\n");
+        Debug_printf("Meatloaf device only accepts communications on channel 15.\r\n");
         state = DEVICE_ERROR;
-        IEC.senderTimeout();
         return state;
     }