/** Temporary data variable to hold the byte being received as it is shifted in */
static uint8_t RX_Data;
-/** Initializes the software UART, ready for data transmission and reception into the global ring buffers. */
+/** Initialises the software UART, ready for data transmission and reception into the global ring buffers. */
void SoftUART_Init(void)
{
/* Set TX pin to output high, enable RX pull-up */
EICRA = (1 << ISC01);
EIMSK = (1 << INT0);
- /* Set reception timer compare period and enable compare ISR */
- OCR1A = BIT_TIME;
+ /* Set the transmission and reception timer compare values for the default baud rate */
+ SoftUART_SetBaud(9600);
+
+ /* Setup reception timer compare ISR */
TIMSK1 = (1 << OCIE1A);
- /* Set transmission timer compare period, enable compare ISR and start the timer */
- OCR3A = BIT_TIME;
+ /* Setup transmission timer compare ISR and start the timer */
TIMSK3 = (1 << OCIE3A);
TCCR3B = ((1 << CS30) | (1 << WGM32));
}
TX_Data >>= 1;
TX_BitsRemaining--;
}
- else if (USBtoUART_Buffer.Count && !(RX_BitsRemaining))
+ else if (!(RX_BitsRemaining) && !(RingBuffer_IsEmpty(&USBtoUART_Buffer)))
{
/* Start bit - TX line low */
STXPORT &= ~(1 << STX);