Add configurable startup delay before power latch activation

Inc/config.h

@@ -108,6 +108,9 @@
 #define TEMP_WARNING            600       // annoying fast beeps [°C * 10].  Here 60.0 °C
 #define TEMP_POWEROFF_ENABLE    0         // to poweroff or not to poweroff, 1 or 0, DO NOT ACTIVITE WITHOUT CALIBRATION!
 #define TEMP_POWEROFF           650       // overheat poweroff. (while not driving) [°C * 10]. Here 65.0 °C
+
+// ############################### STARTUP DELAY ################################
+#define STARTUP_DELAY_MS        500       // startup delay [ms] before power latch is activated. Prevents spurious power-on from brief supply glitches (e.g. UART back-powering).
 // ######################## END OF TEMPERATURE ###############################
 
 

Src/main.c

@@ -193,6 +193,8 @@ int main(void) {
 
   SystemClock_Config();
 
+  HAL_Delay(STARTUP_DELAY_MS); // Wait to prevent spurious power-on when MCU is briefly back-powered (e.g. via UART). If the supply disappears, the MCU will simply lose power and not latch on.
+
   __HAL_RCC_DMA1_CLK_DISABLE();
   MX_GPIO_Init();
   MX_TIM_Init();