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Major changes to the XPLAINBridge software UART code for performance and reliability. New code reduces the number of missed characters and misread characters.

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This commit is contained in:
Dean Camera 2010-07-11 14:14:08 +00:00
parent 2b0d93c129
commit 229935184b
4 changed files with 61 additions and 55 deletions
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19
Projects/XPLAINBridge/XPLAINBridge.c
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@ -76,7 +76,6 @@ RingBuff_t UARTtoUSB_Buffer;
int main(void)
{
SetupHardware();
V2Protocol_Init();
RingBuffer_InitBuffer(&USBtoUART_Buffer);
RingBuffer_InitBuffer(&UARTtoUSB_Buffer);
@ -127,9 +126,15 @@ void UARTBridge_Task(void)
if (CDC_Device_BytesReceived(&VirtualSerial_CDC_Interface))
RingBuffer_Insert(&USBtoUART_Buffer, CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface));
/* Read bytes from the UART receive buffer into the USB IN endpoint */
if (UARTtoUSB_Buffer.Count)
CDC_Device_SendByte(&VirtualSerial_CDC_Interface, RingBuffer_Remove(&UARTtoUSB_Buffer));
/* Check if the software UART flush timer has expired */
if (TIFR0 & (1 << TOV0))
{
TIFR0 |= (1 << TOV0);
/* Read bytes from the UART receive buffer into the USB IN endpoint */
while (UARTtoUSB_Buffer.Count)
CDC_Device_SendByte(&VirtualSerial_CDC_Interface, RingBuffer_Remove(&UARTtoUSB_Buffer));
}
CDC_Device_USBTask(&VirtualSerial_CDC_Interface);
}
@ -174,6 +179,9 @@ void EVENT_USB_Device_ConfigurationChanged(void)
if (CurrentFirmwareMode == MODE_USART_BRIDGE)
{
EndpointConfigSuccess &= CDC_Device_ConfigureEndpoints(&VirtualSerial_CDC_Interface);
/* Configure the UART flush timer */
TCCR0B = ((1 << CS02) | (1 << CS00));
}
else
{
@ -186,6 +194,9 @@ void EVENT_USB_Device_ConfigurationChanged(void)
ENDPOINT_DIR_IN, AVRISP_DATA_EPSIZE,
ENDPOINT_BANK_SINGLE);
#endif
/* Configure the V2 protocol packet handler */
V2Protocol_Init();
}
if (EndpointConfigSuccess)