LiBCM now turns off 5 days after keyOff

LiBCM turns back on with keyOn, USB power, or toggling IMA switch.

Firmware/firmwareLiBCM/config.h

@@ -7,8 +7,8 @@
     #define config_h
     #include "src/libcm.h"
 
-    #define FW_VERSION "0.9.4e"
+    #define FW_VERSION "0.9.5"
-    #define BUILD_DATE "2024AUG19"
+    #define BUILD_DATE "2024OCT07"
 
     //////////////////////////////////////////////////////////////////
 
@@ -114,7 +114,7 @@
     //power saving
     #define KEYOFF_DISABLE_THERMAL_MANAGEMENT_BELOW_SoC_PERCENT 50 //when keyOFF (unless grid charger plugged in) //set to 100 to disable when keyOFF
     #define POWEROFF_DELAY_AFTER_KEYOFF_PACK_EMPTY_MINUTES      10 //When SoC is below 10%, LiBCM will remain on for this many minutes after keyOFF.
-    #define POWEROFF_DELAY_AFTER_KEYOFF_DAYS                     5 //LiBCM turns off this many days after keyOff, unless grid charger powered
+    #define POWEROFF_DELAY_AFTER_KEYOFF_DAYS                     5 //LiBCM turns off this many days after keyOff, unless grid charger powered //comment line to disable
     //to turn LiBCM back on: turn ignition 'ON', or turn IMA switch off and on, or plug in USB cable
 
     //Choose which sign (±) the LCD displays when the battery is discharging

Firmware/firmwareLiBCM/firmwareLiBCM.ino

@@ -64,7 +64,11 @@ void loop()
             SoC_turnOffLiBCM_ifPackEmpty();
             debugUSB_printLatest_data_gridCharger();
         }
-        else { powerSave_sleepIfAllowed(); }
+        else
+        {
+            powerSave_turnOffIfAllowed();
+            powerSave_sleepIfAllowed();
+        }
     }
 
     USB_userInterface_handler();

Firmware/firmwareLiBCM/src/powerSave.cpp

@@ -121,7 +121,7 @@ void powerSave_gotoSleep(void)
         clock_prescale_set(clock_div_1); //16 MHz
         wakeupInterrupts_disable();
     }
-    interrupts();    
+    interrupts();
 
     USB_begin();
 
@@ -136,9 +136,9 @@ void powerSave_gotoSleep(void)
 
 void powerSave_sleepIfAllowed(void)
 {
-    if ((cellBalance_areCellsBalancing()  == NO) /* LiBCM must stay on for safety */                    &&
+    if ((cellBalance_areCellsBalancing()  == NO) /* LiBCM must stay on for safety */                &&
-        (gpio_isGridChargerPluggedInNow() == NO) /* LiBCM must stay on for safety */                    &&
+        (gpio_isGridChargerPluggedInNow() == NO) /* LiBCM must stay on for safety */                &&
-        (time_sinceLatestUserInputUSB_get_ms() > PERIOD_TO_DISABLE_POWERSAVE_AFTER_USB_DATA_RECEIVED_ms) )
+        (time_sinceLatestUserInputUSB_get_ms() > PERIOD_TO_DISABLE_SLEEP_AFTER_USB_DATA_RECEIVED_ms) )
     {
         powerSave_gotoSleep();
     }
@@ -146,6 +146,22 @@ void powerSave_sleepIfAllowed(void)
 
 /////////////////////////////////////////////////////////////////////////////////////////
 
+void powerSave_turnOffIfAllowed(void)
+{
+    #ifdef POWEROFF_DELAY_AFTER_KEYOFF_DAYS
+        uint32_t timeSinceLatestKeyOff_ms = millis() - time_latestKeyOff_ms_get();
+
+        if ((gpio_isGridChargerPluggedInNow() == NO)                                                            &&
+            (time_sinceLatestGridChargerUnplug_get_ms() > PERIOD_TO_DISABLE_TURNOFF_AFTER_CHARGER_UNPLUGGED_ms) &&
+            (timeSinceLatestKeyOff_ms > (POWEROFF_DELAY_AFTER_KEYOFF_DAYS * MILLISECONDS_PER_DAY))               )
+        {
+            gpio_turnLiBCM_off();
+        }
+    #endif
+}
+
+/////////////////////////////////////////////////////////////////////////////////////////
+
 //timer2 wakes LiBCM up every ~1049 ms
 //actual time is: 256_countsToOverflow/(16MHz/clockDiv64/timer2Div1024)
 //this interrupt disabled when LiBCM is awake

Firmware/firmwareLiBCM/src/powerSave.h

@@ -4,17 +4,19 @@
 #ifndef powerSave_h
     #define powerSave_h
     
-    #define PERIOD_TO_DISABLE_POWERSAVE_AFTER_USB_DATA_RECEIVED_ms 60000
+    #define PERIOD_TO_DISABLE_SLEEP_AFTER_USB_DATA_RECEIVED_ms ((uint32_t)60000)
+
+    #define PERIOD_TO_DISABLE_TURNOFF_AFTER_CHARGER_UNPLUGGED_hours 4 //prevents turnoff during brief AC power outage
+    #define PERIOD_TO_DISABLE_TURNOFF_AFTER_CHARGER_UNPLUGGED_ms (((uint32_t)1000 * 60 * 60) * PERIOD_TO_DISABLE_TURNOFF_AFTER_CHARGER_UNPLUGGED_hours)
 
     //     UNKNOWN_INTERRUPT 0 //specifically not defined //see explanation in 'ISR(PCINT1_vect)'
     #define    USB_INTERRUPT 1
     #define  KEYON_INTERRUPT 2
     #define TIMER2_INTERRUPT 3
 
-    void powerSave_handler(void);
-
     void powerSave_init(void);
 
+    void powerSave_turnOffIfAllowed(void);
     void powerSave_sleepIfAllowed(void);
 
 #endif

Firmware/firmwareLiBCM/src/time.h

@@ -42,8 +42,8 @@
     #define STOP_TIMER false
     #define MILLIS_MAXIMUM_VALUE 0xFFFFFFFF //2^32-1
 
-    #define KEY_OFF_UPDATE_PERIOD_ONE_SECOND_ms  ( 1 *  1000)
+    #define KEY_OFF_UPDATE_PERIOD_ONE_SECOND_ms  ((uint32_t)1  *  1000)
-    #define KEY_OFF_UPDATE_PERIOD_TEN_MINUTES_ms (10 * 60000)
+    #define KEY_OFF_UPDATE_PERIOD_TEN_MINUTES_ms ((uint32_t)10 * 60000)
     //JTS2doLater: When the key is on - but the IMA switch is off (or fuse blown) - reduce LTC6804 update period to minimize LTC6804 power consumption
     //Tests to determine whether the IMA switch is on or off:
         //1) compare the VPIN input signal (HVDC voltage inside the PDU) with the pack voltage (as determined by the LTC6804 ICs).
@@ -51,7 +51,8 @@
         //2) LiBCM can reset a timer each time the battery current sensor magnitude exceeds 0 amps (which can only happen if the IMA switch is on).
         //2) If the timer overflows (e.g. after an hour with 0 amps through the pack), LiBCM can likely conclude that the IMA switch is off.
 
-    #define MILLISECONDS_PER_HOUR 3600000
+    #define MILLISECONDS_PER_HOUR ((uint32_t)1000 * 60 * 60)
+    #define MILLISECONDS_PER_DAY  ((uint32_t)24 * MILLISECONDS_PER_HOUR)
 
     #define TIME_DEFAULT_LOOP_PERIOD_ms 10