Makefile addition for GRUVIN9X PCB PORTH real-time diagnostics.

$ make ... PORTH_TIMING=YES

See code comments for details. This is used to analyse real-world timing of
mixer interrupt, setupPulses and PPM or DSM=SERIAL or DSM2=PPM data output
streams.

NOTE: Not compatible to SOUND=YES (SOMO14)

src/Makefile

@@ -198,6 +198,17 @@ XCURVES = YES
 # Values = YES, NO
 GVARS = NO
 
+#------- TIMING DEBUG OPTIONS ------------------------
+
+# Enable debug code to output signals on PORTH for logic analyser timing analysis
+# G9X V4 board only. **WARNING** Not compatible with TX_CADDY=YES or SOMO14 (VOICE=YES)
+#
+# PORTH:7 --> Transistion LOW to HIGH = start of setupPulses(). Transistion HIGH to LOW = end of setupPulses().
+# PORTH:6 --> LOW->HIGH = start of mixer calcs. HIGH->LOW, end of mixer calcs.
+#
+# Values = YES, NO
+PORTH_TIMING=YES
+
 #------- END BUILD OPTIONS ---------------------------
 
 # Define programs and commands.
@@ -424,8 +435,8 @@ ifeq ($(DEBUG), YES)
   CPPDEFS += -DDEBUG
 endif
 
-ifeq ($(EEPROM_PROGRESS_BAR), YES)
-  CPPDEFS += -DEEPROM_PROGRESS_BAR
+ifeq ($(PORTH_TIMING), YES)
+  CPPDEFS += -DPORTH_TIMING
 endif
 
 ifeq ($(SDCARD), YES)
@@ -528,6 +539,10 @@ ifeq ($(PCB), GRUVIN9X)
   ifeq ($(EXTRA_ROTARY_ENCODERS), YES)
     CPPDEFS += -DEXTRA_ROTARY_ENCODERS
   endif
+
+  ifeq ($(EEPROM_PROGRESS_BAR), YES)
+    CPPDEFS += -DEEPROM_PROGRESS_BAR
+  endif
 endif
 
 ifeq ($(PCB), STD128)

src/board_gruvin9x.cpp

@@ -44,7 +44,15 @@ inline void board_init()
   DDRE = 0b00001010;  PORTE = 0b11110100; // 7:PPM_IN, 6: RENC1_B, 5:RENC1_A, 4:USB_DNEG, 3:BUZZER, 2:USB_DPOS, 1:TELEM_TX, 0:TELEM_RX(pull-up off)
   DDRF = 0x00;  PORTF = 0x00; // 7-4:JTAG, 3:ADC_REF_1.2V input, 2-0:ADC_SPARE_2-0
   DDRG = 0b00010000;  PORTG = 0xff; // 7-6:N/A, 5:GearSW, 4: Sim_Ctrl[out], 3:IDL1_Sw, 2:TCut_Sw, 1:RF_Power[in], 0: RudDr_Sw
-  DDRH = 0b00110000;  PORTH = 0b11011111; // 7:0 Spare port [6:SOMO14D-BUSY 5:SOMO14D-DATA 4:SOMO14D-CLK] [2:VIB_OPTION -- setting to input for now]
+
+#ifdef PORTH_TIMING
+  DDRH = 0b11110000;  PORTH = 0b11011111; // PORTH:7-6 enabled for timing analysis output ... see below ...
+#else
+  DDRH = 0b10110000;  PORTH = 0b11011111; // [7:0 DSM/PPM TX-caddy control. 1=PPM, 0=DSM ]
+                                          // [6:SOMO14D-BUSY 5:SOMO14D-DATA 4:SOMO14D-CLK] [2:VIB_OPTION -- setting to input for now]
+                                          // [1:TxD 0:RxD Spare serial port]
+#endif
+
   DDRJ = 0x00;  PORTJ = 0xff; // 7-0:Trim switch inputs
   DDRK = 0x00;  PORTK = 0x00; // anain. No pull-ups!
 #ifdef REV0

src/open9x.cpp

@@ -2996,6 +2996,11 @@ uint16_t getTmr16KHz()
 #if defined (PCBGRUVIN9X)
 ISR(TIMER5_COMPA_vect, ISR_NOBLOCK) // mixer interrupt
 {
+
+#ifdef PORTH_TIMING
+    PORTH |= 0x40; // PORTH:6 LOW->HIGH signals start of mixer interrupt
+#endif
+
   cli();
   TIMSK5 &= ~(1<<OCIE5A); //stop reentrance
   OCR5A = 0x7d * 40; /* 20ms */
@@ -3027,6 +3032,11 @@ ISR(TIMER5_COMPA_vect, ISR_NOBLOCK) // mixer interrupt
   cli();
   TIMSK5 |= (1<<OCIE5A); //stop reentrance
   sei();
+
+#ifdef PORTH_TIMING
+  PORTH &= ~0x40; // PORTH:6 HIGH->LOW signals end of mixer interrupt
+#endif
+
 }
 #endif
 

src/pulses_avr.cpp

@@ -729,6 +729,11 @@ static void setupPulsesPiccoZ(uint8_t chn)
 void setupPulses()
 {
   uint8_t required_protocol = g_model.protocol;
+
+#ifdef PORTH_TIMING
+    PORTH |= 0x80; // PORTH:7 LOW->HIGH signals start of setupPulses()
+#endif
+
   if (s_pulses_paused)
     required_protocol = PROTO_NONE;
 
@@ -884,6 +889,11 @@ void setupPulses()
       // if PPM16, PPM16 pulses are set up automatically within the interrupts
       break;
   }
+
+#ifdef PORTH_TIMING
+    PORTH &= ~0x80; // PORTH:7 HIGH->LOW signals end of setupPulses()
+#endif
+
 }
 
 #ifndef SIMU