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Make software USART used in the XPLAINBridge project directly check and store into the ring buffers, rather than polling from the main program loop to avoid added latency.

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This commit is contained in:
Dean Camera 2010-05-26 06:59:55 +00:00
parent 9b29d1dc50
commit 79742c5d24
5 changed files with 42 additions and 68 deletions
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12
Projects/XPLAINBridge/XPLAINBridge.c
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@ -125,17 +125,9 @@ void USARTBridge_Task(void)
RingBuffer_Insert(&USBtoUART_Buffer, CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface));
/* Read bytes from the UART receive buffer into the USB IN endpoint */
if (!(RingBuffer_Empty(&UARTtoUSB_Buffer)))
if (UARTtoUSB_Buffer.Count)
CDC_Device_SendByte(&VirtualSerial_CDC_Interface, RingBuffer_Remove(&UARTtoUSB_Buffer));
/* Load bytes from the UART transmit buffer into the UART */
if (!(RingBuffer_Empty(&USBtoUART_Buffer)) && SoftUART_IsReady())
SoftUART_TxByte(RingBuffer_Remove(&USBtoUART_Buffer));
/* Load bytes from the UART into the UART receive buffer */
if (SoftUART_IsReceived())
RingBuffer_Insert(&UARTtoUSB_Buffer, SoftUART_RxByte());
CDC_Device_USBTask(&VirtualSerial_CDC_Interface);
}