Honored Contributor
Honored Contributor
i am trying to send and receive data between uart on up3 and hyperterminal. but am not able to set the interrupts properly and as a result my program goes in an infinite loop.
here is a part of my code....could u plz tell me what else needs to be added to the code so that an interrupt is generated when some data comes on the serial port..
int main(void)
{
int led = 0x01;
int ch = 0;
file *fd;
/* initialise the interrupt controller. */
alt_irq_init (alt_irq_base);
iowr_altera_avalon_pio_data(led_pio_base,led); // write initial value to pio
/* initialise the device drivers/software components*/
alt_sys_init();
# ifdef uart_base
fd = fopen("/dev/uart", "r+");
# endif
if(fd){
while(1){
if(flag_read){ /* it is set inside the alt_avalon_uart_rxirq() function when some data is received */
alt_avalon_uart_read(fd,ch,sizeof(int));
break;
} // end of if
} // end of while
} // end of if
if(ch == 'a')
led = 0x02;
else
led = 0x04;
iowr_altera_avalon_pio_data(led_pio_base,led); // write new value to pio
fclose(fd);
}
whenever i run this code it doesnt come out of the while loop even when i type something on the hyperterminal.
plz helo me out
thnx
sourabh goel
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--- Quote End --- Hi sourabh goel, Why don't you try an284 on www.altera.com ? Note : This application note was written for NIOS system. If you are using NIOSII , you would have to convert some of the functions to be NIOSII-compatible. You can reference to an350 to do it. Good luck, Quan
