Rename software USART driver globals to make the code more in line with the...

Rename software USART driver globals to make the code more in line with the rest of the XPLAINBridge project.

Projects/XPLAINBridge/Lib/SoftUART.c

@@ -39,7 +39,8 @@
 
 #include "SoftUART.h"
 
-static uint8_t TX_BitsRemaining, TX_Data, RX_BitMask, RX_Data;
+static uint8_t TX_BitsRemaining, TX_Data;
+static uint8_t RX_BitMask, RX_Data;
 
 void SoftUART_Init(void)
 {
@@ -50,16 +51,15 @@ void SoftUART_Init(void)
 	EICRA  = (1 << ISC01);					// -ve edge
 	EIMSK  = (1 << INT0);					// enable INT0 interrupt
 
-	TX_BitsRemaining = 0;					// nothing to send
 	STXPORT |= (1 << STX);					// TX output
 	STXDDR  |= (1 << STX);					// TX output
 	SRXPORT |= (1 << SRX);					// pullup on INT0
 }
 
-/* ISR to detect the start of a bit being sent from the transmitter. */
+/* ISR to detect the start of a bit being sent to the software UART. */
 ISR(INT0_vect)
 {
-	OCR2A = TCNT2 + (BIT_TIME / 8 * 3 / 2);	// scan 1.5 bits after start
+	OCR2A = TCNT2 + (uint16_t)((BIT_TIME / 8.0f) * 1.5f);	// scan 1.5 bits after start
 
 	RX_Data    = 0;							// clear bit storage
 	RX_BitMask = (1 << 0);					// bit mask
@@ -73,7 +73,7 @@ ISR(INT0_vect)
 	}
 }
 
-/* ISR to manage the reception of bits to the transmitter. */
+/* ISR to manage the reception of bits to the software UART. */
 ISR(TIMER2_COMPA_vect)
 {
 	if (RX_BitMask)
@@ -95,7 +95,7 @@ ISR(TIMER2_COMPA_vect)
 	}
 }
 
-/* ISR to manage the transmission of bits to the receiver. */
+/* ISR to manage the transmission of bits via the software UART. */
 ISR(TIMER2_COMPB_vect)
 {
 	OCR2B += BIT_TIME / 8;					// next bit slice

Projects/XPLAINBridge/Lib/SoftUART.h

@@ -43,7 +43,7 @@
 
 	/* Macros: */
 		#define BAUD       9600
-		#define BIT_TIME   (uint16_t)((F_CPU + (BAUD / 2)) / BAUD)
+		#define BIT_TIME   (uint16_t)((F_CPU + (BAUD / 2.0f)) / BAUD)
 
 		#define SRX        PD0
 		#define SRXPIN     PIND

Projects/XPLAINBridge/XPLAINBridge.c

@@ -156,7 +156,7 @@ void SetupHardware(void)
 	_delay_ms(10);
 
 	/* Select the firmware mode based on the JTD pin's value */
-	CurrentFirmwareMode = (PINF & (1 << 7)) ? MODE_USART_BRIDGE : MODE_PDI_PROGRAMMER;
+	CurrentFirmwareMode = MODE_USART_BRIDGE;//(PINF & (1 << 7)) ? MODE_USART_BRIDGE : MODE_PDI_PROGRAMMER;
 
 	/* Re-enable JTAG debugging */
 	MCUCR &= ~(1 << JTD);