Changes to improve printing performance of the USB connection.

- change watchdog timeout to call Marlin's kill mechanism
- show the "kill" message on the lcd display
- change watchdog timeout from ~4.8s to ~9.6s;
- reduce delta_segments_per_second to 240
- minor tweaks

README.md

@@ -96,8 +96,7 @@ M500       ; save
 M104 S[first_layer_temperature] T0
 M140 S[first_layer_bed_temperature]
 ; wait on hot end and bed temps
-M109
-S[first_layer_temperature] T0
+M109 S[first_layer_temperature] T0
 M190 S[first_layer_bed_temperature]
 ; home axes, probe/adjust z-offset, and pause 4s
 G28

marlin_changes/Configuration.h

@@ -633,7 +633,7 @@
   // Make delta curves from many straight lines (linear interpolation).
   // This is a trade-off between visible corners (not enough segments)
   // and processor overload (too many expensive sqrt calls).
-  #define DELTA_SEGMENTS_PER_SECOND 500
+  #define DELTA_SEGMENTS_PER_SECOND 240
 
   // Convert feedrates to apply to the Effector instead of the Carriages
   #define DELTA_FEEDRATE_SCALING

marlin_changes/Configuration_adv.h

@@ -915,7 +915,7 @@
   // reset. However, THIS FEATURE IS UNSAFE!, as it will only work if
   // interrupts are disabled. And the code could hang in an interrupt
   // routine with interrupts disabled.
-  //#define WATCHDOG_RESET_MANUAL
+  #define WATCHDOG_RESET_MANUAL
 #endif
 
 // @section lcd

marlin_changes/HAL_stm32.c

@@ -861,6 +861,11 @@ void HAL_PCD_MspDeInit(PCD_HandleTypeDef * pcd)
 
 void SysTick_Handler(void)
 {
+#if ENABLED(USE_WATCHDOG)
+#if ENABLED(WATCHDOG_RESET_MANUAL)
+    faux_watchdog_interrupt();
+#endif
+#endif
     ptimer_isr();
     HAL_IncTick();
     HAL_SYSTICK_IRQHandler();
@@ -887,11 +892,6 @@ void TIM6_IRQHandler(void)
 
 void TIM7_IRQHandler(void)
 {
-#if ENABLED(USE_WATCHDOG)
-#if ENABLED(WATCHDOG_RESET_MANUAL)
-    faux_watchdog_interrupt(void);
-#endif
-#endif
     HAL_temp_timer_isr();
     TIM7->SR = 0;
 }

marlin_changes/HAL_stm32.h

@@ -148,11 +148,12 @@ int HAL_tim7_init(void);
 
 // IWDT
 
-#define FAUX_TIMEOUT  5859  // ~6.0s (depends on tim7 rate)
-#define IWDG_TIMEOUT  1500  // ~4.8s
-
+#define FAUX_TIMEOUT  8000  // 8.0s
+#define IWDG_TIMEOUT  3000  // 9.6s
+ 
 int HAL_iwdg_init(void);
 void HAL_iwdg_refresh(void);
+void faux_watchdog_interrupt(void);
 
 // SPI1
 

marlin_changes/Marlin_main.cpp

@@ -15649,6 +15649,7 @@ void kill(const char* lcd_msg)
 #endif
     }
 #else
+    lcd_setalertstatusPGM(lcd_msg);
     sei();
     debug_wait_on_pushbutton();
     cli();

marlin_changes/malyanlcd_stm32.cpp

@@ -608,7 +608,7 @@ void lcd_setalertstatusPGM(const char * message)
 {
     char s[MAX_CURLY_COMMAND];
 
-    sprintf(s, "{E:%s}", message);
+    sprintf(s, "{E:%.30s}", message);
     malyan_ui_write(s);
 }
 

marlin_changes/watchdog_stm32.cpp

@@ -30,37 +30,40 @@
 #include "Marlin.h"
 #include "watchdog.h"
 
-
 #ifndef FAUX_TIMEOUT
-#define FAUX_TIMEOUT  5859  // ~6s, depends on temperature isr rate
+#define FAUX_TIMEOUT  8000  // 8s
 #endif
 
-void watchdog_init(void)
+#if ENABLED(WATCHDOG_RESET_MANUAL)
+static uint16_t faux_watchdog = 0;
+
+void faux_watchdog_interrupt(void)
 {
-    HAL_iwdg_init();
-    watchdog_reset();
+    if (! faux_watchdog) return;
+    if (faux_watchdog--) return;
+
+    SERIAL_ERROR_START();
+    SERIAL_ERRORLNPGM("Watchdog Error");
+
+    kill(PSTR("Watchdog Error"));
+    //while (1);
 }
 
 void watchdog_reset(void)
 {
-#if ENABLED(WATCHDOG_RESET_MANUAL)
     faux_watchdog = FAUX_TIMEOUT;
-#endif
     HAL_iwdg_refresh();
 }
+#else
 
-#if ENABLED(WATCHDOG_RESET_MANUAL)
-static uint16_t faux_watchdog = 0;
-
-void faux_watchdog_interrupt(void)
+void watchdog_reset(void)
 {
-    if (! faux_watchdog) return;
-    if (faux_watchdog--) return;
+    HAL_iwdg_refresh();
+}
+#endif
 
+void watchdog_init(void)
+{
+    HAL_iwdg_init();
     watchdog_reset();
-    SERIAL_ERROR_START();
-    SERIAL_ERRORLNPGM("Watchdog barked, please turn off the printer.");
-    kill(PSTR("ERR:Watchdog"));
-    while (1);
 }
-#endif