Re #2681 and #2626: Power off refactoring, the 9XE RTC reset prevention code now active

radio/src/opentx.cpp

@@ -1260,12 +1260,7 @@ void alert(const pm_char * t, const pm_char *s MESSAGE_SOUND_ARG)
 #if defined(PCBTARANIS) && defined(REV9E)
     uint32_t pwr_check = pwrCheck();
     if (pwr_check == e_power_off) {
-      // TODO this is quick & dirty
+      boardOff();
-      lcdOff();
-      BACKLIGHT_OFF();
-      topLcdOff();
-      SysTick->CTRL = 0; // turn off systick
-      pwrOff();
     }
     else if (pwr_check == e_power_press) {
       refresh = true;
@@ -1276,7 +1271,7 @@ void alert(const pm_char * t, const pm_char *s MESSAGE_SOUND_ARG)
     }
 #else
     if (pwrCheck() == e_power_off) {
-      pwrOff(); // turn power off now
+      boardOff(); // turn power off now
     }
 #endif
   }
@@ -2577,7 +2572,7 @@ int main(void)
   opentxClose();
   lcd_clear() ;
   lcdRefresh() ;
-  pwrOff(); // Only turn power off if necessary
+  boardOff(); // Only turn power off if necessary
   wdt_disable();
   while(1); // never return from main() - there is no code to return back, if any delays occurs in physical power it does dead loop.
 #endif

radio/src/opentx.h

@@ -306,7 +306,13 @@ typedef const int8_t pm_int8_t;
   #define cli()
   #define sei()
   extern void boardInit();
+  #if defined(PCBTARANIS)
+    extern void boardOff();
   #else
+    #define boardOff()  pwrOff();
+  #endif
+#else
+  #define boardOff()  pwrOff();
   #include <avr/io.h>
   #include <avr/pgmspace.h>
   #include "pgmtypes.h"

radio/src/targets/simu/simpgmspace.h

@@ -377,6 +377,7 @@ void eepromReadBlock (uint8_t * pointer_ram, uint32_t address, uint32_t size);
 #define wdt_enable(...) sleep(1/*ms*/)
 #define wdt_reset() sleep(1/*ms*/)
 #define boardInit()
+#define boardOff()
 
 #define OS_MutexID pthread_mutex_t
 extern OS_MutexID audioMutex;

radio/src/targets/taranis/board_taranis.cpp

@@ -187,7 +187,7 @@ void boardInit()
       lcdRefreshWait();
     }
     if (duration < PWR_PRESS_DURATION_MIN || duration >= PWR_PRESS_DURATION_MAX) {
-      pwrOff();
+      boardOff();
     }
   }
   else {
@@ -198,8 +198,27 @@ void boardInit()
   backlightInit();
 #endif
 }
+
+void boardOff()
+{
+  BACKLIGHT_OFF();
+#if defined(REV9E)
+  topLcdOff();
 #endif
 
+#if defined(REV9E)
+  while (pwrPressed()) {
+    wdt_reset();
+  }
+#endif
+
+  lcdOff();
+  SysTick->CTRL = 0; // turn off systick
+  pwrOff();
+}
+
+#endif   // #if !defined(SIMU)
+
 
 #if defined(USB_JOYSTICK) && !defined(SIMU)
 extern USB_OTG_CORE_HANDLE USB_OTG_dev;

radio/src/targets/taranis/pwr_driver.c

@@ -37,9 +37,6 @@
 #include "board_taranis.h"
 #include "../../pwr.h"
 
-extern volatile uint32_t g_tmr10ms;
-#define get_tmr10ms() g_tmr10ms
-
 void pwrInit()
 {
   // if any changes are done to the PWR PIN or pwrOn() function
@@ -87,13 +84,19 @@ void pwrOff()
 {
   GPIO_ResetBits(PWR_GPIO, PWR_GPIO_PIN_ON);
 
+  // disable interrupts
+ __disable_irq();
+
+
 #if defined(REV9E)
-  // 9E needs watchdog reset because CPU is still running while the power
+  // 9E needs watchdog reset because CPU is still running while 
-  // key is held pressed by the user
+  // the power key is held pressed by the user.
-  while (1) {
+  // The power key should be released by now, but we must make sure
+  while (pwrPressed()) {
     wdt_reset();
-#if 0
+  }
-    // It doesn't work correctly, if we press long on the pwr button, the radio restarts when the button is released
+  // Put the CPU into sleep to reduce the consumption,
+  // it might help with the RTC reset issue
   PWR->CR |= PWR_CR_CWUF;
   /* Select STANDBY mode */
   PWR->CR |= PWR_CR_PDDS;
@@ -102,8 +105,12 @@ void pwrOff()
   /* Request Wait For Event */
   __WFE();
 #endif
+
+  while(1) {
+    wdt_reset();
   }
-#endif
+
+  //this function must not return!
 }
 
 #if defined(REV9E)

radio/src/tasks_arm.cpp

@@ -196,12 +196,7 @@ void menusTask(void * pdata)
 #endif
 
   opentxClose();
-
+  boardOff(); // Only turn power off if necessary
-#if !defined(SIMU)
-  SysTick->CTRL = 0; // turn off systick
-#endif
-
-  pwrOff(); // Only turn power off if necessary
 }
 
 extern void audioTask(void* pdata);