UART ISR

Now SEEMS!! to be functioning...

http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/laugh.gif

I have noted that the IRQ call is not flushed after the ISR execution... http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/mad.gif

In order to explain to the community I cut and paste the simple code I have created

for my UART "SERIALE_EXT" peripheral

I hope It will be usefull:

//////////////////////////////////////////////////////////////////////////////////////////////////////////////////

# include <stdio.h># include "altera_avalon_uart_regs.h"# include "altera_avalon_uart.h"# include "sys/alt_irq.h"# include "system.h"

// Register the istance into the CPU //

ALTERA_AVALON_UART_INSTANCE( SERIALE_EXT, seriale_ext );

void handle_seriale_ext_interrupt (void *context, alt_u32 id);

int _serial_rcv_exception;

// ************************************************************************** //

// ************************************************************************** //

// MAIN Function //

int main (void)

{

// Initialize the IRQ on the UART selected //

ALTERA_AVALON_UART_INIT ( SERIALE_EXT, seriale_ext );

// Recast the _edge_capture pointer to match the alt_irq_register()

// function prototype.

void* serial_rcv_exception_ptr = (void*) &_serial_rcv_exception;

// Register the interrupt handler. //

alt_irq_register(SERIALE_EXT_IRQ, serial_rcv_exception_ptr, handle_seriale_ext_interrupt);

} // END MAIN //

// ************************************************************************** //

// ************************************************************************** //

// UART ISR Handling //

void handle_seriale_ext_interrupt (void *context, alt_u32 id)

{

// Cast context to _edge_capture&#39;s type.

// It is important to keep this volatile,

// to avoid compiler optimization issues.

volatile int* serial_rcv_exception_ptr = (volatile int*) context;

// Store the value in the Serial exception register in *context. //

*serial_rcv_exception_ptr = IORD_ALTERA_AVALON_UART_STATUS(SERIALE_EXT_BASE);

// Reset the Serial exception register. //

IOWR_ALTERA_AVALON_UART_STATUS(SERIALE_EXT_BASE, (*serial_rcv_exception_ptr & 0xFF7F));

// Print a simple message on the STDOUT peripheral //

printf("\rISR HAS BEEN\nEXECUTED!!!");

} // END handle_serial_ext_interrupt //

//////////////////////////////////////////////////////////////////////////////////////////////////////////////////

bye,

shadowice