fix compile warning

Makefile

@@ -36,7 +36,7 @@ ENABLE_REDUCE_LOW_MID_TX_POWER   := 1
 ENABLE_ALARM                     := 0
 ENABLE_TX1750                    := 0
 # MDC1200 2.8 kB
-ENABLE_MDC1200                   := 1
+ENABLE_MDC1200                   := 0
 ENABLE_MDC1200_SHOW_OP_ARG       := 1
 ENABLE_PWRON_PASSWORD            := 0
 ENABLE_RESET_AES_KEY             := 0

driver/bk1080.c

@@ -185,7 +185,7 @@ uint16_t BK1080_ReadRegister(BK1080_register_t Register)
 	I2C_Start();
 	I2C_Write(0x80);
 	I2C_Write((Register << 1) | I2C_READ);
-	I2C_ReadBuffer(Value, sizeof(Value));
+	I2C_ReadBuffer(Value, sizeof(Value), false);
 	I2C_Stop();
 	return (Value[0] << 8) | Value[1];
 }

driver/eeprom.c

@@ -32,7 +32,8 @@ void EEPROM_ReadBuffer(const uint16_t address, void *p_buffer, const unsigned in
 
 	I2C_Start();
 	I2C_Write(0xA1);
-	I2C_ReadBuffer(p_buffer, size);
+//	I2C_ReadBuffer(p_buffer, size, false);
+	I2C_ReadBuffer(p_buffer, size, true);   // faster read
 	I2C_Stop();
 }
 
@@ -59,7 +60,9 @@ void EEPROM_WriteBuffer8(const uint16_t address, const void *p_buffer)
 	// only write the data if it's different to what's already there
 
 	uint8_t buffer[8];
+
 	EEPROM_ReadBuffer(address, buffer, 8);
+
 	if (memcmp(p_buffer, buffer, 8) != 0)
 	{
 		I2C_Start();

driver/i2c.c

@@ -44,6 +44,47 @@ void I2C_Stop(void)
 	SYSTICK_DelayUs(1);
 }
 
+uint8_t I2C_Read_fast(bool bFinal)
+{
+	uint8_t i, Data;
+
+	PORTCON_PORTA_IE |= PORTCON_PORTA_IE_A11_BITS_ENABLE;
+	PORTCON_PORTA_OD &= ~PORTCON_PORTA_OD_A11_MASK;
+	GPIOA->DIR &= ~GPIO_DIR_11_MASK;
+
+	Data = 0;
+	for (i = 0; i < 8; i++)
+	{
+		GPIO_ClearBit(&GPIOA->DATA, GPIOA_PIN_I2C_SCL);
+		SYSTICK_Delay250ns(1);
+		GPIO_SetBit(&GPIOA->DATA, GPIOA_PIN_I2C_SCL);
+		SYSTICK_Delay250ns(1);
+		Data <<= 1;
+		SYSTICK_Delay250ns(1);
+		if (GPIO_CheckBit(&GPIOA->DATA, GPIOA_PIN_I2C_SDA))
+			Data |= 1U;
+		GPIO_ClearBit(&GPIOA->DATA, GPIOA_PIN_I2C_SCL);
+		SYSTICK_Delay250ns(1);
+	}
+
+	PORTCON_PORTA_IE &= ~PORTCON_PORTA_IE_A11_MASK;
+	PORTCON_PORTA_OD |= PORTCON_PORTA_OD_A11_BITS_ENABLE;
+	GPIOA->DIR |= GPIO_DIR_11_BITS_OUTPUT;
+	GPIO_ClearBit(&GPIOA->DATA, GPIOA_PIN_I2C_SCL);
+	SYSTICK_Delay250ns(1);
+	if (bFinal)
+		GPIO_SetBit(&GPIOA->DATA, GPIOA_PIN_I2C_SDA);
+	else
+		GPIO_ClearBit(&GPIOA->DATA, GPIOA_PIN_I2C_SDA);
+	SYSTICK_Delay250ns(1);
+	GPIO_SetBit(&GPIOA->DATA, GPIOA_PIN_I2C_SCL);
+	SYSTICK_Delay250ns(1);
+	GPIO_ClearBit(&GPIOA->DATA, GPIOA_PIN_I2C_SCL);
+	SYSTICK_Delay250ns(1);
+
+	return Data;
+}
+
 uint8_t I2C_Read(bool bFinal)
 {
 	uint8_t i, Data;
@@ -53,16 +94,16 @@ uint8_t I2C_Read(bool bFinal)
 	GPIOA->DIR &= ~GPIO_DIR_11_MASK;
 
 	Data = 0;
-	for (i = 0; i < 8; i++) {
+	for (i = 0; i < 8; i++)
+	{
 		GPIO_ClearBit(&GPIOA->DATA, GPIOA_PIN_I2C_SCL);
 		SYSTICK_DelayUs(1);
 		GPIO_SetBit(&GPIOA->DATA, GPIOA_PIN_I2C_SCL);
 		SYSTICK_DelayUs(1);
 		Data <<= 1;
 		SYSTICK_DelayUs(1);
-		if (GPIO_CheckBit(&GPIOA->DATA, GPIOA_PIN_I2C_SDA)) {
+		if (GPIO_CheckBit(&GPIOA->DATA, GPIOA_PIN_I2C_SDA))
 			Data |= 1U;
-		}
 		GPIO_ClearBit(&GPIOA->DATA, GPIOA_PIN_I2C_SCL);
 		SYSTICK_DelayUs(1);
 	}
@@ -72,11 +113,10 @@ uint8_t I2C_Read(bool bFinal)
 	GPIOA->DIR |= GPIO_DIR_11_BITS_OUTPUT;
 	GPIO_ClearBit(&GPIOA->DATA, GPIOA_PIN_I2C_SCL);
 	SYSTICK_DelayUs(1);
-	if (bFinal) {
+	if (bFinal)
 		GPIO_SetBit(&GPIOA->DATA, GPIOA_PIN_I2C_SDA);
-	} else {
+	else
 		GPIO_ClearBit(&GPIOA->DATA, GPIOA_PIN_I2C_SDA);
-	}
 	SYSTICK_DelayUs(1);
 	GPIO_SetBit(&GPIOA->DATA, GPIOA_PIN_I2C_SCL);
 	SYSTICK_DelayUs(1);
@@ -132,25 +172,29 @@ int I2C_Write(uint8_t Data)
 	return ret;
 }
 
-int I2C_ReadBuffer(void *pBuffer, const unsigned int Size)
+int I2C_ReadBuffer(void *pBuffer, const unsigned int Size, const bool fast)
 {
 	uint8_t *pData = (uint8_t *)pBuffer;
 	unsigned int i;
 
 	if (Size == 1)
 	{
-		*pData = I2C_Read(true);
+		*pData = fast ? I2C_Read_fast(true) : I2C_Read(true);
 		return 1;
 	}
 
-	for (i = 0; i < (Size - 1); i++)
+	if (fast)
 	{
-//		SYSTICK_DelayUs(1);
-		pData[i] = I2C_Read(false);
+		for (i = 0; i < (Size - 1); i++)
+			pData[i] = I2C_Read_fast(false);
+		pData[i++] = I2C_Read_fast(true);
+	}
+	else
+	{
+		for (i = 0; i < (Size - 1); i++)
+			pData[i] = I2C_Read(false);
+		pData[i++] = I2C_Read(true);
 	}
-
-//	SYSTICK_DelayUs(1);
-	pData[i++] = I2C_Read(true);
 
 	return Size;
 }

driver/i2c.h

@@ -29,9 +29,10 @@ void I2C_Start(void);
 void I2C_Stop(void);
 
 uint8_t I2C_Read(bool bFinal);
+uint8_t I2C_Read_fast(bool bFinal);
 int I2C_Write(uint8_t Data);
 
-int I2C_ReadBuffer(void *pBuffer, unsigned int Size);
+int I2C_ReadBuffer(void *pBuffer, unsigned int Size, const bool fast);
 int I2C_WriteBuffer(const void *pBuffer, unsigned int Size);
 
 #endif

driver/systick.c

@@ -27,19 +27,44 @@ void SYSTICK_Init(void)
 	gTickMultiplier = 48;
 }
 
-void SYSTICK_DelayUs(uint32_t Delay)
+void SYSTICK_DelayUs(const uint32_t Delay)
 {
-	const uint32_t ticks    = Delay * gTickMultiplier;
-	uint32_t       i        = 0;
-	uint32_t       Start    = SysTick->LOAD;
-	uint32_t       Previous = SysTick->VAL;
+	const uint32_t ticks = Delay * gTickMultiplier;
+	uint32_t i           = 0;
+	uint32_t Start       = SysTick->LOAD;
+	uint32_t Previous    = SysTick->VAL;
+
 	do {
-		uint32_t Current;
 		uint32_t Delta;
-		while ((Current = SysTick->VAL) == Previous) {}
-		Delta    = (Current < Previous) ? -Current : Start - Current;
-		i       += Delta + Previous;
+		uint32_t Current;
+
+		do Current = SysTick->VAL;
+		while (Current == Previous);
+
+		Delta = (Current < Previous) ? -Current : Start - Current;
+		i += Delta + Previous;
 		Previous = Current;
+
 	} while (i < ticks);
 }
 
+void SYSTICK_Delay250ns(const uint32_t Delay)
+{
+	const uint32_t ticks = (Delay * gTickMultiplier) >> 2;
+	uint32_t i           = 0;
+	uint32_t Start       = SysTick->LOAD;
+	uint32_t Previous    = SysTick->VAL;
+
+	do {
+		uint32_t Delta;
+		uint32_t Current;
+
+		do Current = SysTick->VAL;
+		while (Current == Previous);
+
+		Delta = (Current < Previous) ? -Current : Start - Current;
+		i += Delta + Previous;
+		Previous = Current;
+
+	} while (i < ticks);
+}

driver/systick.h

@@ -20,7 +20,8 @@
 #include <stdint.h>
 
 void SYSTICK_Init(void);
-void SYSTICK_DelayUs(uint32_t Delay);
+void SYSTICK_DelayUs(const uint32_t Delay);
+void SYSTICK_Delay250ns(const uint32_t Delay);
 
 #endif
 

ui/main.c

@@ -244,6 +244,9 @@ void UI_update_rssi(const int16_t rssi, const int16_t glitch, const int16_t nois
 			if (g_current_function == FUNCTION_RECEIVE)
 				UI_DisplayRSSIBar(rssi, glitch, noise, true);
 		}
+	#else
+		(void)glitch;
+		(void)noise;
 	#endif
 
 	{	// original little RS bars