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Update commenting ready for release.

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This commit is contained in:
Richard Barry 2008-03-06 16:51:57 +00:00
parent f73e663411
commit f39424feee
4 changed files with 63 additions and 63 deletions
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65
Demo/PPC405_Xilinx_Virtex4_GCC/RTOSDemo/serial/serial.c
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@ -53,12 +53,10 @@
/* Demo application includes. */
#include "serial.h"
/* Microblaze driver includes. */
/* Library includes. */
#include "xparameters.h"
#include "xuartlite.h"
#include "xuartlite_l.h"
#include "xintc_l.h"
#include "xintc.h"
/*-----------------------------------------------------------*/
@ -67,26 +65,31 @@ transmitted. */
static xQueueHandle xRxedChars;
static xQueueHandle xCharsForTx;
/* Structure that maintains information on the UART being used. */
static XUartLite xUART;
/*
* Sample UART interrupt handler. Note this is used to demonstrate the kernel
* features and test the port - it is not intended to represent an efficient
* implementation.
*/
static void vSerialISR( XUartLite *pxUART );
/*-----------------------------------------------------------*/
xComPortHandle xSerialPortInitMinimal( unsigned portLONG ulWantedBaud, unsigned portBASE_TYPE uxQueueLength )
{
unsigned portLONG ulControlReg, ulMask;
extern XIntc xInterruptController;
/* NOTE: The baud rate used by this driver is determined by the hardware
parameterization of the UART Lite peripheral, and the baud value passed to
this function has no effect. */
( void ) ulWantedBaud;
/* Create the queues used to hold Rx and Tx characters. */
xRxedChars = xQueueCreate( uxQueueLength, ( unsigned portBASE_TYPE ) sizeof( signed portCHAR ) );
xCharsForTx = xQueueCreate( uxQueueLength + 1, ( unsigned portBASE_TYPE ) sizeof( signed portCHAR ) );
if( ( xRxedChars ) && ( xCharsForTx ) )
/* Only initialise the UART if the queues were created correctly. */
if( ( xRxedChars != NULL ) && ( xCharsForTx != NULL ) )
{
XUartLite_Initialize( &xUART, XPAR_RS232_UART_DEVICE_ID );
@ -94,11 +97,15 @@ extern XIntc xInterruptController;
XUartLite_DisableInterrupt( &xUART );
if( xPortInstallInterruptHandler( XPAR_OPB_INTC_0_RS232_UART_INTERRUPT_INTR, ( XInterruptHandler )vSerialISR, (void *)&xUART ) == pdPASS )
{
{
/* xPortInstallInterruptHandler() could fail if
vPortSetupInterruptController() has not been called prior to this
function. */
XUartLite_EnableInterrupt( &xUART );
}
}
/* There is only one port so the handle is not used. */
return ( xComPortHandle ) 0;
}
/*-----------------------------------------------------------*/
@ -170,31 +177,37 @@ void vSerialClose( xComPortHandle xPort )
static void vSerialISR( XUartLite *pxUART )
{
unsigned portLONG ulISRStatus;
portBASE_TYPE xTaskWokenByTx = pdFALSE, xTaskWokenByRx = pdFALSE;
portBASE_TYPE xTaskWokenByTx = pdFALSE, xTaskWokenByRx = pdFALSE, lDidSomething;
portCHAR cChar;
ulISRStatus = XIo_In32( pxUART->RegBaseAddress + XUL_STATUS_REG_OFFSET );
do
{
lDidSomething = pdFALSE;
if( ( ulISRStatus & (XUL_SR_RX_FIFO_FULL | XUL_SR_RX_FIFO_VALID_DATA ) ) != 0 )
{
/* A character is available - place it in the queue of received
characters. This might wake a task that was blocked waiting for
data. */
cChar = ( portCHAR ) XIo_In32( pxUART->RegBaseAddress + XUL_RX_FIFO_OFFSET );
xTaskWokenByRx = xQueueSendFromISR( xRxedChars, &cChar, xTaskWokenByRx );
}
ulISRStatus = XIo_In32( pxUART->RegBaseAddress + XUL_STATUS_REG_OFFSET );
if( ( ulISRStatus & XUL_SR_TX_FIFO_EMPTY ) != 0 )
{
/* There is space in the FIFO - if there are any characters queue for
transmission they can be send to the UART now. This might unblock a
task that was waiting for space to become available on the Tx queue. */
if( xQueueReceiveFromISR( xCharsForTx, &cChar, &xTaskWokenByTx ) == pdTRUE )
if( ( ulISRStatus & (XUL_SR_RX_FIFO_FULL | XUL_SR_RX_FIFO_VALID_DATA ) ) != 0 )
{
XIo_Out32( pxUART->RegBaseAddress + XUL_TX_FIFO_OFFSET, cChar );
/* A character is available - place it in the queue of received
characters. This might wake a task that was blocked waiting for
data. */
cChar = ( portCHAR ) XIo_In32( pxUART->RegBaseAddress + XUL_RX_FIFO_OFFSET );
xTaskWokenByRx = xQueueSendFromISR( xRxedChars, &cChar, xTaskWokenByRx );
lDidSomething = pdTRUE;
}
}
if( ( ulISRStatus & XUL_SR_TX_FIFO_EMPTY ) != 0 )
{
/* There is space in the FIFO - if there are any characters queue for
transmission they can be sent to the UART now. This might unblock a
task that was waiting for space to become available on the Tx queue. */
if( xQueueReceiveFromISR( xCharsForTx, &cChar, &xTaskWokenByTx ) == pdTRUE )
{
XIo_Out32( pxUART->RegBaseAddress + XUL_TX_FIFO_OFFSET, cChar );
lDidSomething = pdTRUE;
}
}
} while( lDidSomething == pdTRUE );
/* If we woke any tasks we may require a context switch. */
if( xTaskWokenByTx || xTaskWokenByRx )