Update overvolage mode update to prevent deadlock

diff --git a/v10/main.c b/v10/main.c
index 421d2fe..72f2498 100644 (file)
--- a/v10/main.c
+++ b/v10/main.c
@@ -61,7 +61,7 @@ uint8_t forced_cmd_val = 0;
 int8_t internal_temp_error_shutdown = 0; /* Flag and error code */
 uint8_t external_disable = 0; /* Flag only */
 uint8_t mosfet_temp_shutdown = 0; /* Flag only */
-uint8_t overvoltage = 0; /* Flag and counter. Used to create a delay when overvoltage is detected,
+volatile uint8_t overvoltage = 0; /* Flag and counter. Used to create a delay when overvoltage is detected,
                                                        set to OVERVOLTAGE_PROTECTION_CYCLES and decreases to 0 */
 
 /* Current running mode */
@@ -157,8 +157,10 @@ void overvoltage_protect(uint32_t gpio)
        overvoltage = OVERVOLTAGE_PROTECTION_CYCLES;
        gpio_set(fan_ctrl); /* Turn on FAN immediatly */
        /* Change current working mode */
-       old_mode = mode;
-       mode = mode_overvoltage;
+       if (mode != mode_overvoltage) {
+               old_mode = mode;
+               mode = mode_overvoltage;
+       }
 }