diff --git a/app/app.c b/app/app.c
index f4ed832..26d4390 100644
--- a/app/app.c
+++ b/app/app.c
@@ -586,16 +586,34 @@ static void CheckRadioInterrupts(void)
 	if (SCANNER_IsScanning())
 		return;
 
-	while (BK4819_ReadRegister(BK4819_REG_0C) & 1u)
-	{	// BK chip interrupt request
-
-		uint16_t interrupt_status_bits;
-
-		// reset the interrupt ?
+	while (BK4819_ReadRegister(BK4819_REG_0C) & 1u) { // BK chip interrupt request
+		// clear interrupts
 		BK4819_WriteRegister(BK4819_REG_02, 0);
+		// fetch interrupt status bits
 
-		// fetch the interrupt status bits
-		interrupt_status_bits = BK4819_ReadRegister(BK4819_REG_02);
+		union {
+			struct {
+				uint16_t __UNUSED : 1;
+				uint16_t fskRxSync : 1;
+				uint16_t sqlLost : 1;
+				uint16_t sqlFound : 1;
+				uint16_t voxLost : 1;
+				uint16_t voxFound : 1;
+				uint16_t ctcssLost : 1;
+				uint16_t ctcssFound : 1;
+				uint16_t cdcssLost : 1;
+				uint16_t cdcssFound : 1;
+				uint16_t cssTailFound : 1;
+				uint16_t dtmf5ToneFound : 1;
+				uint16_t fskFifoAlmostFull : 1;
+				uint16_t fskRxFinied : 1;
+				uint16_t fskFifoAlmostEmpty : 1;
+				uint16_t fskTxFinied : 1;
+			};
+			uint16_t __raw;
+		} interrupts;
+
+		interrupts.__raw = BK4819_ReadRegister(BK4819_REG_02);
 
 		// 0 = no phase shift
 		// 1 = 120deg phase shift
@@ -605,18 +623,13 @@ static void CheckRadioInterrupts(void)
 //		if (ctcss_shift > 0)
 //			g_CTCSS_Lost = true;
 
-		if (interrupt_status_bits & BK4819_REG_02_DTMF_5TONE_FOUND)
-		{	// save the RX'ed DTMF character
-			const char c = DTMF_GetCharacter(BK4819_GetDTMF_5TONE_Code());
-			if (c != 0xff)
-			{
-				if (gCurrentFunction != FUNCTION_TRANSMIT)
-				{
-					if (gSetting_live_DTMF_decoder)
-					{
+		if (interrupts.dtmf5ToneFound) {	
+			const char c = DTMF_GetCharacter(BK4819_GetDTMF_5TONE_Code()); // save the RX'ed DTMF character
+			if (c != 0xff) {
+				if (gCurrentFunction != FUNCTION_TRANSMIT) {
+					if (gSetting_live_DTMF_decoder) {
 						size_t len = strlen(gDTMF_RX_live);
-						if (len >= (sizeof(gDTMF_RX_live) - 1))
-						{	// make room
+						if (len >= sizeof(gDTMF_RX_live) - 1) { // make room
 							memmove(&gDTMF_RX_live[0], &gDTMF_RX_live[1], sizeof(gDTMF_RX_live) - 1);
 							len--;
 						}
@@ -627,10 +640,8 @@ static void CheckRadioInterrupts(void)
 					}
 
 #ifdef ENABLE_DTMF_CALLING
-					if (gRxVfo->DTMF_DECODING_ENABLE || gSetting_KILLED)
-					{
-						if (gDTMF_RX_index >= (sizeof(gDTMF_RX) - 1))
-						{	// make room
+					if (gRxVfo->DTMF_DECODING_ENABLE || gSetting_KILLED) {
+						if (gDTMF_RX_index >= sizeof(gDTMF_RX) - 1) { // make room
 							memmove(&gDTMF_RX[0], &gDTMF_RX[1], sizeof(gDTMF_RX) - 1);
 							gDTMF_RX_index--;
 						}
@@ -647,40 +658,35 @@ static void CheckRadioInterrupts(void)
 			}
 		}
 
-		if (interrupt_status_bits & BK4819_REG_02_CxCSS_TAIL)
+		if (interrupts.cssTailFound)
 			g_CxCSS_TAIL_Found = true;
 
-		if (interrupt_status_bits & BK4819_REG_02_CDCSS_LOST)
-		{
+		if (interrupts.cdcssLost) {
 			g_CDCSS_Lost = true;
 			gCDCSSCodeType = BK4819_GetCDCSSCodeType();
 		}
 
-		if (interrupt_status_bits & BK4819_REG_02_CDCSS_FOUND)
+		if (interrupts.cdcssFound)
 			g_CDCSS_Lost = false;
 
-		if (interrupt_status_bits & BK4819_REG_02_CTCSS_LOST)
+		if (interrupts.ctcssLost)
 			g_CTCSS_Lost = true;
 
-		if (interrupt_status_bits & BK4819_REG_02_CTCSS_FOUND)
+		if (interrupts.ctcssFound)
 			g_CTCSS_Lost = false;
 
-		#ifdef ENABLE_VOX
-		if (interrupt_status_bits & BK4819_REG_02_VOX_LOST)
-		{
+#ifdef ENABLE_VOX
+		if (interrupts.voxLost) {
 			g_VOX_Lost         = true;
 			gVoxPauseCountdown = 10;
 
-			if (gEeprom.VOX_SWITCH)
-			{
-				if (gCurrentFunction == FUNCTION_POWER_SAVE && !gRxIdleMode)
-				{
+			if (gEeprom.VOX_SWITCH) {
+				if (gCurrentFunction == FUNCTION_POWER_SAVE && !gRxIdleMode) {
 					gPowerSave_10ms            = power_save2_10ms;
 					gPowerSaveCountdownExpired = 0;
 				}
 
-				if (gEeprom.DUAL_WATCH != DUAL_WATCH_OFF && (gScheduleDualWatch || gDualWatchCountdown_10ms < dual_watch_count_after_vox_10ms))
-				{
+				if (gEeprom.DUAL_WATCH != DUAL_WATCH_OFF && (gScheduleDualWatch || gDualWatchCountdown_10ms < dual_watch_count_after_vox_10ms)) {
 					gDualWatchCountdown_10ms = dual_watch_count_after_vox_10ms;
 					gScheduleDualWatch = false;
 
@@ -691,27 +697,24 @@ static void CheckRadioInterrupts(void)
 			}
 		}
 
-		if (interrupt_status_bits & BK4819_REG_02_VOX_FOUND)
-		{
+		if (interrupts.voxFound) {
 			g_VOX_Lost         = false;
 			gVoxPauseCountdown = 0;
 		}
-		#endif
+#endif
 
-		if (interrupt_status_bits & BK4819_REG_02_SQUELCH_LOST)
-		{
+		if (interrupts.sqlLost) {
 			g_SquelchLost = true;
 			BK4819_ToggleGpioOut(BK4819_GPIO6_PIN2_GREEN, true);
 		}
 
-		if (interrupt_status_bits & BK4819_REG_02_SQUELCH_FOUND)
-		{
+		if (interrupts.sqlFound) {
 			g_SquelchLost = false;
 			BK4819_ToggleGpioOut(BK4819_GPIO6_PIN2_GREEN, false);
 		}
 
 #ifdef ENABLE_AIRCOPY
-		if (interrupt_status_bits & BK4819_REG_02_FSK_FIFO_ALMOST_FULL &&
+		if (interrupts.fskFifoAlmostFull &&
 			gScreenToDisplay == DISPLAY_AIRCOPY &&
 			gAircopyState == AIRCOPY_TRANSFER &&
 			gAirCopyIsSendMode == 0)