Battery percentage added

README.md

@@ -22,10 +22,14 @@ To enable the custom option just uncomment the line by removing the starting '#'
 
 # Other changes made
 
+Battery voltage boot screen now includes the percentage (as well as voltage).
+
 * "STEP" menu, added 1.25kHz option, removed 5kHz option
 * "ABR" menu, shows extended backlight times
 * "MIC" menu, shows mic gain in dB's, now includes the max mic gain possible (+15.5dB)
-   
+* "VOL" menu, renamed to "BATVOL", shows voltage and percentage 
+* "AM" menu, renamed to "MODE", shows modulation mode
+
 # Compiler
 
 arm-none-eabi GCC version 10.3.1 is recommended, which is the current version on Ubuntu 22.04.03 LTS.

misc.c

@@ -29,6 +29,9 @@ bool              gSetting_350EN;
 uint8_t           gSetting_F_LOCK;
 bool              gSetting_ScrambleEnable;
 
+const uint16_t gMax_bat_v = 840;   // 8.4V
+const uint16_t gMin_bat_v = 660;   // 6.6V
+
 const uint32_t    gDefaultAesKey[4] =
 {
 	0x4AA5CC60,

misc.h

@@ -75,6 +75,9 @@ enum CssScanMode_t {
 
 typedef enum CssScanMode_t CssScanMode_t;
 
+extern const uint16_t    gMax_bat_v;
+extern const uint16_t    gMin_bat_v;
+
 extern const uint32_t   *gUpperLimitFrequencyBandTable;
 extern const uint32_t   *gLowerLimitFrequencyBandTable;
 

ui/menu.c

@@ -89,7 +89,7 @@ static const char MenuList[][7] =
 	"PONMSG",
 	"ROGER",
 	"BATVOL",
-	"AM",
+	"MODE",
 // 48
 	#ifndef DISABLE_NOAA
 		"NOAA_S",
@@ -375,6 +375,10 @@ void UI_DisplayMenu(void)
 				sprintf(String, "%d sec", gSubMenuSelection * 10);
 			break;
 	
+		case MENU_AM:
+			strcpy(String, (gSubMenuSelection == 0) ? "FM" : "AM");
+			break;
+			
 		case MENU_BCL:
 		case MENU_BEEP:
 		case MENU_AUTOLK:
@@ -383,7 +387,6 @@ void UI_DisplayMenu(void)
 		case MENU_STE:
 		case MENU_D_ST:
 		case MENU_D_DCD:
-		case MENU_AM:
 		#ifndef DISABLE_NOAA
 			case MENU_NOAA_S:
 		#endif
@@ -497,7 +500,7 @@ void UI_DisplayMenu(void)
 			break;
 	
 		case MENU_VOL:
-			sprintf(String, "%.3fV", gBatteryVoltageAverage * 0.01);  // argh, floating point :(
+			sprintf(String, "%.2fV", gBatteryVoltageAverage * 0.01);  // argh, floating point :(
 			break;
 	
 		case MENU_RESET:
@@ -511,6 +514,15 @@ void UI_DisplayMenu(void)
 
 	UI_PrintString(String, 50, 127, 2, 8, true);
 
+	if (gMenuCursor == MENU_VOL)
+	{	// 2nd text line
+		const uint16_t volts = (gBatteryVoltageAverage < gMin_bat_v) ? gMin_bat_v :
+		                       (gBatteryVoltageAverage > gMax_bat_v) ? gMax_bat_v :
+		                        gBatteryVoltageAverage;
+		sprintf(String, "%u%%", (100 * (volts - gMin_bat_v)) / (gMax_bat_v - gMin_bat_v));
+		UI_PrintString(String, 50, 127, 4, 8, true);
+	}
+
 	if (gMenuCursor == MENU_OFFSET)
 		UI_PrintString("MHz", 50, 127, 4, 8, true);
 

ui/welcome.c

@@ -21,6 +21,7 @@
 #include "external/printf/printf.h"
 #include "helper/battery.h"
 #include "settings.h"
+#include "misc.h"
 #include "ui/helper.h"
 #include "ui/welcome.h"
 #include "version.h"
@@ -44,8 +45,14 @@ void UI_DisplayWelcome(void)
 
 		if (gEeprom.POWER_ON_DISPLAY_MODE == POWER_ON_DISPLAY_MODE_VOLTAGE)
 		{
+			const uint16_t volts = (gBatteryVoltageAverage < gMin_bat_v) ? gMin_bat_v :
+			                       (gBatteryVoltageAverage > gMax_bat_v) ? gMax_bat_v :
+		                            gBatteryVoltageAverage;
+
 			sprintf(WelcomeString0, "VOLTAGE");
-			sprintf(WelcomeString1, "%.2fV", gBatteryVoltageAverage * 0.01);  // argh, floating point :(
+			sprintf(WelcomeString1, "%.2fV %u%%",
+				gBatteryVoltageAverage * 0.01,        // argh, floating point :(
+				(100 * (volts - gMin_bat_v)) / (gMax_bat_v - gMin_bat_v));
 		}
 		else
 		{