SlotState enum added and BatteryMeasurement has SlotState enum

src/battery_data/battery.h

@@ -6,7 +6,7 @@
 #define BATTERY_H
 
 
-//Battery states
+//Battery states read by Pi
 typedef enum{
     STATE_EMPTY= 0x01,
     STATE_BATTERY_DETECTED= 0x02,
@@ -17,13 +17,39 @@ typedef enum{
 
 } BatteryState;
 
-typedef struct{
+//Battery Discharge Safety Check
+typedef enum __attribute((packed))__{
+    SLOT_STATE_OK= 0x00,
+    SLOT_STATE_SOV= 0x01,
+    SLOT_ERR_HOV= (0x02 | 0x80),
+
+    SLOT_ERR_OVERTEMPERATURE= (0x03 | 0x80), // first bit indicates complete error
+
+    // Control error states
+    SLOT_WARN_LOWER_DAC_NOT_POSSIBLE=0x10,
+    SLOT_WARN_HIGHER_DAC_NOT_POSSIBLE=0x11,
+    SLOT_WARN_DAC_INVALID_VALUE=0x12,
+    SLOT_WARN_LOWER_PWM_NOT_POSSIBLE=0x13,
+    SLOT_WARN_HIGHER_PWM_NOT_POSSIBLE=0x14,
+
+    // I2C Slave Error states
+    SLOT_ERR_NO_DAC =  (0x20 | 0x80),
+    SLOT_ERR_NO_ADC1 = (0x21 | 0x80),
+    SLOT_ERR_NO_ADC2 = (0x22 | 0x80),
+    SLOT_ERR_NO_ADC3 = (0x23 | 0x80),
+    SLOT_ERR_NO_ADC4 = (0x24 | 0x80),
+    SLOT_ERR_CONFIGBYTE = (0x25 | 0x80),
+    SLOT_ERR_DAC_WRITE_FAILED= (0x26 | 0x80)
+} SlotState;
+
+typedef struct __attribute__((packed)){
     uint16_t voltage;
     int16_t current;
     uint16_t temperature;
+    SlotState slot_state;
 }BatteryMeasurement;
 
-typedef struct __attribute((packed))__{
+typedef struct __attribute__((packed)){
     uint16_t min_voltage;
     uint16_t max_voltage;
     uint8_t cut_off_current;