Apply my changes v1

driver/backlight.c

@@ -68,12 +68,6 @@ void BACKLIGHT_InitHardware()
 
 static void BACKLIGHT_Sound(void)
 {
-    if (gEeprom.POWER_ON_DISPLAY_MODE == POWER_ON_DISPLAY_MODE_SOUND || gEeprom.POWER_ON_DISPLAY_MODE == POWER_ON_DISPLAY_MODE_ALL)
-    {
-        AUDIO_PlayBeep(BEEP_880HZ_60MS_DOUBLE_BEEP);
-        AUDIO_PlayBeep(BEEP_880HZ_60MS_DOUBLE_BEEP);
-    }
-
     gK5startup = false;
 }
 

driver/bk4819-regs.h

@@ -74,6 +74,7 @@ enum BK4819_REGISTER_t {
     BK4819_REG_3D = 0x3DU,
     BK4819_REG_3E = 0x3EU,
     BK4819_REG_3F = 0x3FU,
+    BK4819_REG_40 = 0x40U,
     BK4819_REG_43 = 0x43U,
     BK4819_REG_46 = 0x46U,
     BK4819_REG_47 = 0x47U,
@@ -96,6 +97,7 @@ enum BK4819_REGISTER_t {
     BK4819_REG_5A = 0x5AU,
     BK4819_REG_5B = 0x5BU,
     BK4819_REG_5C = 0x5CU,
+    BK4819_REG_5E = 0x5EU,
     BK4819_REG_5D = 0x5DU,
     BK4819_REG_5F = 0x5FU,
     BK4819_REG_63 = 0x63U,

driver/bk4819.c

@@ -48,6 +48,21 @@ __inline uint16_t scale_freq(const uint16_t freq)
     return (((uint32_t)freq * 1353245u) + (1u << 16)) >> 17;   // with rounding
 }
 
+void BK4819_FskEnableTx(void){
+    const uint16_t fsk_reg59 = BK4819_ReadRegister(BK4819_REG_59);
+    BK4819_WriteRegister(BK4819_REG_59, (1u << 11) | fsk_reg59);
+}
+
+void BK4819_FskClearFifo(void){
+    const uint16_t fsk_reg59 = BK4819_ReadRegister(BK4819_REG_59);
+    BK4819_WriteRegister(BK4819_REG_59, (1u << 15) | (1u << 14) | fsk_reg59);
+}
+
+void BK4819_FskEnableRx(void){
+    const uint16_t fsk_reg59 = BK4819_ReadRegister(BK4819_REG_59);
+    BK4819_WriteRegister(BK4819_REG_59, (1u << 12) | fsk_reg59);
+}
+
 void BK4819_Init(void)
 {
     GPIO_SetBit(&GPIOC->DATA, GPIOC_PIN_BK4819_SCN);

driver/bk4819.h

@@ -77,6 +77,11 @@ void     BK4819_InitAGC(bool amModulation);
 
 void     BK4819_ToggleGpioOut(BK4819_GPIO_PIN_t Pin, bool bSet);
 
+void     BK4819_ResetFSK(void);
+void     BK4819_FskClearFifo(void);
+void     BK4819_FskEnableRx(void);
+void     BK4819_FskEnableTx(void);
+
 void     BK4819_SetCDCSSCodeWord(uint32_t CodeWord);
 void     BK4819_SetCTCSSFrequency(uint32_t BaudRate);
 void     BK4819_SetTailDetection(const uint32_t freq_10Hz);

driver/keyboard.c

@@ -26,6 +26,8 @@ KEY_Code_t gKeyReading0     = KEY_INVALID;
 KEY_Code_t gKeyReading1     = KEY_INVALID;
 uint16_t   gDebounceCounter = 0;
 bool       gWasFKeyPressed  = false;
+uint8_t prevLetter = 0;
+KEY_Code_t prevKey = KEY_INVALID;
 
 static const struct {
 

driver/keyboard.h

@@ -47,8 +47,10 @@ typedef enum KEY_Code_e KEY_Code_t;
 
 extern KEY_Code_t gKeyReading0;
 extern KEY_Code_t gKeyReading1;
-extern uint16_t   gDebounceCounter;
-extern bool       gWasFKeyPressed;
+extern uint16_t gDebounceCounter;
+extern bool gWasFKeyPressed;
+extern uint8_t prevLetter;
+extern KEY_Code_t prevKey;
 
 KEY_Code_t KEYBOARD_Poll(void);