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Altera_Forum
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14 years ago

Using 2 timers ?

We are trying to use 2 interval timer (200ms and 500ms) on a nios 2 processor. One is configure as a system clock timer and its work fine., but the second don’t ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

Hello,

We have made several tests today, and the problem was solved. In fact it was easy, we have made a mistake during addressing the register and the during of the function of the timer is longer than the period of the timer. Below a code example for other user of this forum :

// Declaration of the timer (500ms)

IOWR_ALTERA_AVALON_TIMER_CONTROL(TIMER_500M_BASE, 0);

IOWR_ALTERA_AVALON_TIMER_PERIODL(TIMER_500M_BASE, 0x9680);

IOWR_ALTERA_AVALON_TIMER_PERIODH(TIMER_500M_BASE, 0x0098);

alt_irq_register( TIMER_500M_IRQ, null, TIMER500M_IRQ);

IOWR_ALTERA_AVALON_TIMER_CONTROL(TIMER_500M_BASE,

ALTERA_AVALON_TIMER_CONTROL_CONT_MSK

| ALTERA_AVALON_TIMER_CONTROL_START_MSK

| ALTERA_AVALON_TIMER_CONTROL_ITO_MSK);

// Snapshot

IOWR_ALTERA_AVALON_TIMER_SNAPL(TIMER_500M_BASE, 0x00);

periodl=IORD_ALTERA_AVALON_TIMER_SNAPL(TIMER_500M_BASE);

periodh=IORD_ALTERA_AVALON_TIMER_SNAPH(TIMER_500M_BASE);

Thanks again for your help.