Added bat voltage/percentage statusbar compile option

Makefile

@@ -20,6 +20,8 @@ ENABLE_BOOT_BEEPS             := 0
 ENABLE_DTMF_DECODER           := 1
 ENABLE_COMPANDER              := 1
 ENABLE_SHOW_CHARGE_LEVEL      := 1
+ENABLE_STATUSBAR_VOLTAGE      := 0
+ENABLE_STATUSBAR_PERCENTAGE   := 1
 #ENABLE_SINGLE_VFO_CHAN       := 1
 #ENABLE_BAND_SCOPE            := 1
 
@@ -193,6 +195,12 @@ endif
 ifeq ($(ENABLE_SHOW_CHARGE_LEVEL),1)
 	CFLAGS  += -DENABLE_SHOW_CHARGE_LEVEL
 endif
+ifeq ($(ENABLE_STATUSBAR_VOLTAGE),1)
+	CFLAGS  += -DENABLE_STATUSBAR_VOLTAGE
+endif
+ifeq ($(ENABLE_STATUSBAR_PERCENTAGE),1)
+	CFLAGS  += -DENABLE_STATUSBAR_PERCENTAGE
+endif
 ifeq ($(ENABLE_DTMF_DECODER),1)
 	CFLAGS  += -DENABLE_DTMF_DECODER
 endif

README.md

@@ -31,6 +31,8 @@ ENABLE_BOOT_BEEPS             := 0       give user audio feedback on volume knob
 ENABLE_DTMF_DECODER           := 1       live on-screen DTMF decoder
 ENABLE_COMPANDER              := 1       compander option - setting not yet saved
 ENABLE_SHOW_CHARGE_LEVEL      := 1       show the charge level when the radio is on charge 
+ENABLE_STATUSBAR_VOLTAGE      := 0       show the battery voltage on the top status bar - when possible
+ENABLE_STATUSBAR_PERCENTAGE   := 1       show the battery percentage on the top status bar - when possible
 #ENABLE_SINGLE_VFO_CHAN       := 1       not yet implemented - single VFO on display when possible
 #ENABLE_BAND_SCOPE            := 1       not yet implemented - spectrum/pan-adapter
 ```

driver/bk4819.c

@@ -80,17 +80,19 @@ void BK4819_Init(void)
 		( 0u << 10) |     // AF Rx Gain-1
 		(58u <<  4) |     // AF Rx Gain-2
 		( 8u <<  0));     // AF DAC Gain (after Gain-1 and Gain-2)
-		
-//	const uint8_t dtmf_coeffs[] = {0x6F,0x6B,0x67,0x62,0x50,0x47,0x3A,0x2C,0x41,0x37,0x25,0x17,0xE4,0xCB,0xB5,0x9F};
-//	for (unsigned int i = 0; i < ARRAY_SIZE(dtmf_coeffs); i++)
-//		BK4819_WriteRegister(BK4819_REG_09, (i << 12) | dtmf_coeffs[i]);
-	
+
+#if 1
+	const uint8_t dtmf_coeffs[] = {111, 107, 103, 98, 80, 71, 58, 44, 65, 55, 37, 23, 228, 203, 181, 159};
+	for (unsigned int i = 0; i < ARRAY_SIZE(dtmf_coeffs); i++)
+		BK4819_WriteRegister(BK4819_REG_09, (i << 12) | dtmf_coeffs[i]);
+#else
+	// original code
 	BK4819_WriteRegister(BK4819_REG_09, 0x006F);  // 6F
 	BK4819_WriteRegister(BK4819_REG_09, 0x106B);  // 6B
 	BK4819_WriteRegister(BK4819_REG_09, 0x2067);  // 67
 	BK4819_WriteRegister(BK4819_REG_09, 0x3062);  // 62
 	BK4819_WriteRegister(BK4819_REG_09, 0x4050);  // 50
-	BK4819_WriteRegister(BK4819_REG_09, 0x5046);  // 47 **
+	BK4819_WriteRegister(BK4819_REG_09, 0x5047);  // 47
 	BK4819_WriteRegister(BK4819_REG_09, 0x603A);  // 3A
 	BK4819_WriteRegister(BK4819_REG_09, 0x702C);  // 2C
 	BK4819_WriteRegister(BK4819_REG_09, 0x8041);  // 41
@@ -101,6 +103,7 @@ void BK4819_Init(void)
 	BK4819_WriteRegister(BK4819_REG_09, 0xD0CB);  // CB
 	BK4819_WriteRegister(BK4819_REG_09, 0xE0B5);  // B5
 	BK4819_WriteRegister(BK4819_REG_09, 0xF09F);  // 9F
+#endif
 
 	BK4819_WriteRegister(BK4819_REG_1F, 0x5454);
 	BK4819_WriteRegister(BK4819_REG_3E, 0xA037);

ui/helper.c

@@ -104,6 +104,22 @@ void UI_PrintStringSmall(const char *pString, uint8_t Start, uint8_t End, uint8_
 	}
 }
 
+void UI_PrintStringSmallBuffer(const char *pString, uint8_t *buffer)
+{
+	size_t i;
+	const unsigned int char_width   = ARRAY_SIZE(gFontSmall[0]);
+	const unsigned int char_spacing = char_width + 0;
+	for (i = 0; i < strlen(pString); i++)
+	{
+		if (pString[i] >= 32)
+		{
+			const unsigned int Index = (unsigned int)pString[i] - 32;
+			if (Index < ARRAY_SIZE(gFontSmall))
+				memmove(buffer + (i * char_spacing), &gFontSmall[Index], char_width);
+		}
+	}
+}
+
 void UI_DisplayFrequency(const char *pDigits, uint8_t X, uint8_t Y, bool bDisplayLeadingZero, bool bFlag)
 {
 	const unsigned int char_width  = 13;

ui/helper.h

@@ -24,6 +24,7 @@ void UI_GenerateChannelString(char *pString, const uint8_t Channel);
 void UI_GenerateChannelStringEx(char *pString, const bool bShowPrefix, const uint8_t ChannelNumber);
 void UI_PrintString(const char *pString, uint8_t Start, uint8_t End, uint8_t Line, uint8_t Width);
 void UI_PrintStringSmall(const char *pString, uint8_t Start, uint8_t End, uint8_t Line);
+void UI_PrintStringSmallBuffer(const char *pString, uint8_t *buffer);
 void UI_DisplayFrequency(const char *pDigits, uint8_t X, uint8_t Y, bool bDisplayLeadingZero, bool bFlag);
 void UI_DisplayFrequencySmall(const char *pDigits, uint8_t X, uint8_t Y, bool bDisplayLeadingZero);
 void UI_DisplaySmallDigits(const uint8_t size, const char *str, const uint8_t x, const uint8_t y, const bool display_leading_zeros);

ui/status.c

@@ -23,10 +23,12 @@
 #include "bitmaps.h"
 #include "driver/keyboard.h"
 #include "driver/st7565.h"
+#include "external/printf/printf.h"
 #include "functions.h"
 #include "helper/battery.h"
 #include "misc.h"
 #include "settings.h"
+#include "ui/helper.h"
 #include "ui/ui.h"
 #include "ui/status.h"
 
@@ -100,12 +102,34 @@ void UI_DisplayStatus(const bool test_display)
 
 	// KEY-LOCK indicator
 	if (gEeprom.KEY_LOCK || test_display)
+	{
 		memmove(line, BITMAP_KeyLock, sizeof(BITMAP_KeyLock));
+		line += sizeof(BITMAP_KeyLock);
+	}
 	else
 	if (gWasFKeyPressed)
+	{
 		memmove(line, BITMAP_F_Key, sizeof(BITMAP_F_Key));
-	line += sizeof(BITMAP_F_Key);
+		line += sizeof(BITMAP_F_Key);
+	}
+	else
+	if (!gChargingWithTypeC)
+	{	// battery voltage/percentage
 
+		#if defined(ENABLE_STATUSBAR_VOLTAGE)
+			char s[6];
+			sprintf(s, "%u.%02u", gBatteryVoltageAverage / 100, gBatteryVoltageAverage % 100);
+			UI_PrintStringSmallBuffer(s, line);
+		#elif defined(ENABLE_STATUSBAR_PERCENTAGE)
+			char s[6];
+			const uint16_t volts = (gBatteryVoltageAverage < gMin_bat_v) ? gMin_bat_v :
+								   (gBatteryVoltageAverage > gMax_bat_v) ? gMax_bat_v :
+									gBatteryVoltageAverage;
+			sprintf(s, "%u%%", (100 * (volts - gMin_bat_v)) / (gMax_bat_v - gMin_bat_v));
+			UI_PrintStringSmallBuffer(s, line);
+		#endif
+	}
+	
 	// USB-C charge indicator
 	if (gChargingWithTypeC || test_display)
 		memmove(line, BITMAP_USB_C, sizeof(BITMAP_USB_C));