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Changed the way the ARM7/9 GCC ports enter interrupts that can cause a context switch.

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This commit is contained in:
Richard Barry 2007-10-28 13:55:35 +00:00
parent c54ec1c639
commit ada7fa862d
24 changed files with 322 additions and 275 deletions
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42
Demo/WizNET_DEMO_GCC_ARM7/i2cISR.c
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@ -119,21 +119,36 @@ void vI2CISRCreateQueues( unsigned portBASE_TYPE uxQueueLength, xQueueHandle *px
}
/*-----------------------------------------------------------*/
void vI2C_ISR( void ) __attribute__ (( naked ));
void vI2C_ISR( void )
/* The ISR entry point. */
void vI2C_ISR_Wrapper( void ) __attribute__ (( naked ));
/* The ISR function to perform the actual work. This must be a separate
function from the wrapper to ensure the correct stack frame is set up. */
void vI2C_ISR_Handler( void );
/*-----------------------------------------------------------*/
void vI2C_ISR_Wrapper( void )
{
portENTER_SWITCHING_ISR();
/* Save the context of the interrupted task. */
portSAVE_CONTEXT();
/* Variables must be static. */
/* Call the handler to perform the actual work. This must be a
separate function to ensure the correct stack frame is set up. */
vI2C_ISR_Handler();
/* Holds the current transmission state. */
static I2C_STATE eCurrentState = eSentStart;
static portLONG lMessageIndex = -i2cBUFFER_ADDRESS_BYTES; /* There are two address bytes to send prior to the data. */
static portBASE_TYPE xTaskWokenByTx;
static portLONG lBytesLeft;
xTaskWokenByTx = pdFALSE;
/* Restore the context of whichever task is going to run next. */
portRESTORE_CONTEXT();
}
/*-----------------------------------------------------------*/
void vI2C_ISR_Handler( void )
{
/* Holds the current transmission state. */
static I2C_STATE eCurrentState = eSentStart;
static portLONG lMessageIndex = -i2cBUFFER_ADDRESS_BYTES; /* There are two address bytes to send prior to the data. */
portBASE_TYPE xTaskWokenByTx = pdFALSE;
portLONG lBytesLeft;
/* The action taken for this interrupt depends on our current state. */
switch( eCurrentState )
@ -342,7 +357,10 @@ void vI2C_ISR( void )
I2C_I2CONCLR = i2cSI_BIT;
VICVectAddr = i2cCLEAR_VIC_INTERRUPT;
portEXIT_SWITCHING_ISR( ( xTaskWokenByTx ) );
if( xTaskWokenByTx )
{
portYIELD_FROM_ISR();
}
}
/*-----------------------------------------------------------*/