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Altera_Forum
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21 years ago

60 Uart's ?

I want to realize 60 Uart's on NIOS2 cpu I can add 60 in SOPC builder only 32 IRQ can be assingd What happen whit these other UART that have no IRQ? Can someone tell that? And how can i f...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
21 years ago

<div class='quotetop'>QUOTE </div>

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Is it easy to mod de uClinux 4 altera_avalon_uarts driver ?[/b]

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very easy to mod the Linux driver to support more. All you need is to instantiate more Nios_serial structure. In the file

drivers/serial/NIOSserial.c: 

static struct NIOS_serial nios_soft = {
//    { 0,0,1,0,0,0,0, (nasys_printf_uart), (nasys_printf_uart_irq) }, /* ttyS0 */
    { 0,0,1,0,0,0,0, (int) (na_uart0), (na_uart0_irq) },  /* ttyS0 */# ifdef na_uart1
//    { 0,0,0,0,0,0,0, (nasys_gdb_uart), (nasys_gdb_uart_irq) },    /* ttyS1 */
    { 0,0,0,0,0,0,0, (int) (na_uart1), (na_uart1_irq) },  /* ttyS1 */# endif# ifdef na_uart2
    { 0,0,0,0,0,0,0, (int) (na_uart2), (na_uart2_irq) },  /* ttyS2 */# endif# ifdef na_uart3
    { 0,0,0,0,0,0,0, (int) (na_uart3), (na_uart3_irq) },  /* ttyS3 */# endif
};

You can add more, or change to dynamically allocate and initialize this array. Maybe you also need minor change to the interrupt service routine since you have shared interrupts.

Wentao

Microtronix