Added second discharge curve for 2200mAh type battery and hidden BatT…

…yp menu entry

app/menu.c

@@ -331,8 +331,13 @@ int MENU_GetLimits(uint8_t menu_id, int32_t *pMin, int32_t *pMax)
 		#endif
 
 		case MENU_BATCAL:
-			*pMin = 1600;  // 0
-			*pMax = 2200;  // 2300
+			*pMin = 1600;
+			*pMax = 2200;
+			break;
+
+		case MENU_BATTYP:
+			*pMin = 0;
+			*pMax = 1;
 			break;
 
 		case MENU_F1SHRT:
@@ -772,17 +777,21 @@ void MENU_AcceptSetting(void)
 		#endif
 
 		case MENU_BATCAL:
-		{
+		{																 // voltages are averages between discharge curves of 1600 and 2200 mAh
 			gBatteryCalibration[0] = (520ul * gSubMenuSelection) / 760;  // 5.20V empty, blinking above this value, reduced functionality below
-			gBatteryCalibration[1] = (700ul * gSubMenuSelection) / 760;  // 7.00V,  ~5%, 1 bars above this value
-			gBatteryCalibration[2] = (745ul * gSubMenuSelection) / 760;  // 7.45V, ~17%, 2 bars above this value
+			gBatteryCalibration[1] = (689ul * gSubMenuSelection) / 760;  // 6.89V,  ~5%, 1 bars above this value
+			gBatteryCalibration[2] = (724ul * gSubMenuSelection) / 760;  // 7.24V, ~17%, 2 bars above this value
 			gBatteryCalibration[3] =          gSubMenuSelection;         // 7.6V,  ~29%, 3 bars above this value
-			gBatteryCalibration[4] = (788ul * gSubMenuSelection) / 760;  // 7.88V, ~65%, 4 bars above this value
+			gBatteryCalibration[4] = (771ul * gSubMenuSelection) / 760;  // 7.71V, ~65%, 4 bars above this value
 			gBatteryCalibration[5] = 2300;
 			SETTINGS_SaveBatteryCalibration(gBatteryCalibration);
 			return;
 		}
 
+		case MENU_BATTYP:
+			gEeprom.BATTERY_TYPE = gSubMenuSelection;
+			break;
+
 		case MENU_F1SHRT:
 		case MENU_F1LONG:
 		case MENU_F2SHRT:
@@ -1170,6 +1179,10 @@ void MENU_ShowCurrentSetting(void)
 			gSubMenuSelection = gBatteryCalibration[3];
 			break;
 
+		case MENU_BATTYP:
+			gSubMenuSelection = gEeprom.BATTERY_TYPE;
+			break;			
+
 		case MENU_F1SHRT:
 		case MENU_F1LONG:
 		case MENU_F2SHRT:

board.c

@@ -614,7 +614,8 @@ void BOARD_EEPROM_Init(void)
 	#endif
 	gEeprom.ROGER                          = (Data[1] <  3) ? Data[1] : ROGER_MODE_OFF;
 	gEeprom.REPEATER_TAIL_TONE_ELIMINATION = (Data[2] < 11) ? Data[2] : 0;
-	gEeprom.TX_VFO                     = (Data[3] <  2) ? Data[3] : 0;
+	gEeprom.TX_VFO                         = (Data[3] <  2) ? Data[3] : 0;
+	gEeprom.BATTERY_TYPE                   = (Data[4] < BATTERY_TYPE_UNKNOWN) ? Data[4] : BATTERY_TYPE_1600_MAH;
 
 	// 0ED0..0ED7
 	EEPROM_ReadBuffer(0x0ED0, Data, 8);

helper/battery.c

@@ -17,6 +17,7 @@
 #include "battery.h"
 #include "driver/backlight.h"
 #include "misc.h"
+#include "settings.h"
 #include "ui/battery.h"
 #include "ui/menu.h"
 #include "ui/ui.h"
@@ -34,48 +35,47 @@ uint16_t          gBatteryCheckCounter;
 
 volatile uint16_t gPowerSave_10ms;
 
-/*
-Based on real measurement
-
-Volts	Percent		Volts	Percent		Volts	Percent		Volts	Percent
-8.28	100			7.95099	73			7.7184	46			7.48116	19
-8.22	99          7.94188	72          7.71091	45          7.46364	18
-8.17	98          7.9338	71          7.70911	44          7.44789	17
-8.13632	97          7.92684	70          7.70098	43          7.43318	16
-8.12308	96          7.9178	69          7.69619	42          7.41864	15
-8.09688	95          7.90823	68          7.69018	41          7.40579	14
-8.08124	94          7.89858	67          7.68473	40          7.39289	13
-8.06912	93          7.88667	66          7.67911	39          7.37839	12
-8.05826	92          7.87673	65          7.67087	38          7.36017	11
-8.05008	91          7.86864	64          7.66601	37          7.33704	10
-8.04192	90          7.85802	63          7.6599	36          7.3079	9
-8.03866	89          7.84816	62          7.65418	35          7.26793	8
-8.03089	88          7.83744	61          7.64775	34          7.21291	7
-8.0284	87          7.82748	60          7.64065	33          7.13416	6
-8.02044	86          7.81983	59          7.63136	32          7.02785	5
-8.01832	85          7.80929	58          7.6244	31          6.89448	4
-8.01072	84          7.79955	57          7.61636	30          6.72912	3
-8.00965	83          7.79017	56          7.60738	29          6.5164	2
-8.00333	82          7.78107	55          7.597	28          6.19272	1
-7.99973	81          7.77167	54          7.5876	27          5.63138	0
-7.99218	80          7.76509	53          7.57732	26
-7.98999	79          7.75649	52          7.56563	25
-7.98234	78          7.74939	51          7.55356	24
-7.97892	77          7.7411	50          7.54088	23
-7.97043	76          7.73648	49          7.52683	22
-7.96478	75          7.72911	48          7.51285	21
-7.95983	74          7.72097	47          7.49832	20
-*/
+
 unsigned int BATTERY_VoltsToPercent(const unsigned int voltage_10mV)
 {
-	if (voltage_10mV > 814)
-		return 100;
-	if (voltage_10mV > 756)
-		return ((132ul * voltage_10mV) /  100) - 974u;
-	if (voltage_10mV > 729)
-		return  ((63ul * voltage_10mV) /  100) - 452u;
-	if (voltage_10mV > 600)
-		return  ((52ul * voltage_10mV) / 1000) - 31u;    	
+	const uint16_t crv1600[][2] = {
+		{814, 100},
+		{756, 24 },
+		{729, 7 },
+		{597, 0 },
+		{0,   0}
+	};
+
+	const uint16_t crv2200[][2] = {
+		{823, 100},
+		{740, 60},
+		{707, 21},
+		{680, 5},
+		{505, 0},
+		{0,   0}
+	};
+
+	const BATTERY_Type_t type = gEeprom.BATTERY_TYPE;
+	const uint16_t(*crv)[2];
+	uint8_t size;
+	if (type == BATTERY_TYPE_2200_MAH) {
+		crv = crv2200;
+		size = ARRAY_SIZE(crv2200);
+	}	
+	else {
+		crv = crv1600;
+		size = ARRAY_SIZE(crv1600);
+	}
+
+	const int mulipl = 1000;
+	for (int i = 1; i < size; i++) {
+		if (voltage_10mV > crv[i][0]) {
+			int a = (crv[i - 1][1] - crv[i][1]) * mulipl / (crv[i - 1][0] - crv[i][0]);
+			int b = crv[i][1] - a * crv[i][0] / mulipl;
+			int p = a * voltage_10mV / mulipl + b;
+			return MIN(p, 100);
+		}
+	}
 	return 0;
 }
 

helper/battery.h

@@ -33,6 +33,12 @@ extern uint16_t          gBatteryCheckCounter;
 
 extern volatile uint16_t gPowerSave_10ms;
 
+typedef enum {
+    BATTERY_TYPE_1600_MAH,
+    BATTERY_TYPE_2200_MAH,
+    BATTERY_TYPE_UNKNOWN
+} BATTERY_Type_t;
+
 unsigned int BATTERY_VoltsToPercent(const unsigned int voltage_10mV);
 void BATTERY_GetReadings(const bool bDisplayBatteryLevel);
 

settings.c

@@ -137,6 +137,7 @@ void SETTINGS_SaveSettings(void)
 	State[1] = gEeprom.ROGER;
 	State[2] = gEeprom.REPEATER_TAIL_TONE_ELIMINATION;
 	State[3] = gEeprom.TX_VFO;
+	State[4] = gEeprom.BATTERY_TYPE;
 	EEPROM_WriteBuffer(0x0EA8, State);
 
 	State[0] = gEeprom.DTMF_SIDE_TONE;

settings.h

@@ -21,6 +21,7 @@
 #include <stdint.h>
 
 #include "frequencies.h"
+#include <helper/battery.h>
 #include "radio.h"
 
 enum POWER_OnDisplayMode_t {
@@ -230,6 +231,7 @@ typedef struct {
 	uint8_t 			  KEY_M_LONG_PRESS_ACTION;
 	uint8_t               BACKLIGHT_MIN;
 	uint8_t               BACKLIGHT_MAX;
+	BATTERY_Type_t		  BATTERY_TYPE;
 } EEPROM_Config_t;
 
 extern EEPROM_Config_t gEeprom;

ui/menu.c

@@ -134,6 +134,7 @@ const t_menu_item MenuList[] =
 	{"FrCali", VOICE_ID_INVALID,                       MENU_F_CALI        }, // reference xtal calibration
 #endif
 	{"BatCal", VOICE_ID_INVALID,                       MENU_BATCAL        }, // battery voltage calibration
+	{"BatTyp", VOICE_ID_INVALID,                       MENU_BATTYP        }, // battery type 1600/2200mAh
 	{"Reset",  VOICE_ID_INITIALISATION,                MENU_RESET         }, // might be better to move this to the hidden menu items ?
 
 	{"",       VOICE_ID_INVALID,                       0xff               }  // end of list - DO NOT delete or move this this
@@ -316,6 +317,12 @@ const char gSubMenu_BAT_TXT[3][8] =
 	"PERCENT"
 };
 
+const char gSubMenu_BATTYP[2][9] =
+{
+	"1600mAh",
+	"2200mAh"
+};
+
 const char gSubMenu_SCRAMBLER[11][7] =
 {
 	"OFF",
@@ -835,7 +842,11 @@ void UI_DisplayMenu(void)
 			sprintf(String, "%u.%02uV\n%u", vol / 100, vol % 100, gSubMenuSelection);
 			break;
 		}
-
+
+		case MENU_BATTYP:
+			strcpy(String, gSubMenu_BATTYP[gSubMenuSelection]);
+			break;	
+
 		case MENU_F1SHRT:
 		case MENU_F1LONG:
 		case MENU_F2SHRT:

ui/menu.h

@@ -120,7 +120,8 @@ enum
 	MENU_F1LONG,
 	MENU_F2SHRT,
 	MENU_F2LONG,
-	MENU_MLONG
+	MENU_MLONG,
+	MENU_BATTYP
 };
 
 extern const uint8_t FIRST_HIDDEN_MENU_ITEM;
@@ -154,7 +155,7 @@ extern const char        gSubMenu_RX_TX[4][6];
 	extern const char    gSubMenu_AM_fix_test1[4][8];
 #endif
 extern const char        gSubMenu_BAT_TXT[3][8];
-
+extern const char 		 gSubMenu_BATTYP[2][9];
 extern const char        gSubMenu_SCRAMBLER[11][7];
 
 typedef struct {char* name; uint8_t id;} t_sidefunction;