Zybo > Chronicles blog 20 > TTC > match mode > XTTCPS_OPTION_MATCH_MODE / XTtcPs_SetMatchValue() / XTtcPs_GetInterval() / XTtcPs_EnableInterrupts() / ISRの例

MicroZed Chronicles リスト http://adiuvoengineering.com/?page_id=285
@ Adam Taylor blog
https://forums.xilinx.com/t5/Xcell-Daily-Blog/Introduction-to-the-Zynq-Triple-Timer-Counter-Part-Four-Adam/ba-p/416243

We will look at using the match registers to issue interrupts for different counter values.

...

We can OR the XTTCPS_OPTION_MATCH_MODE as defined within the xttcps.h file to enable the match mode along with the disabled waveform and interval mode.

...

次にトリガーを設定

XTtcPs_SetMatchValue(&Timer, 0, (interval/3));

内部カウンター(interval)はXTtcPs_GetInterval()にて取得。

次にmatch interruptを設定

XTtcPs_EnableInterrupts(TtcPsInt, XTTCPS_IXR_MATCH_0_MASK);

ISR(TickHandler()としている)では各interruptに対応する処理を書く

static void TickHandler(void *CallBackRef)
{
    u32 StatusEvent;

    StatusEvent = XTtcPs_GetInterruptStatus((XTtcPs *)CallBackRef);
    XTtcPs_ClearInterruptStatus((XTtcPs *)CallBackRef, StatusEvent);

    if (0 != (XTTCPS_IXR_INTERVAL_MASK & StatusEvent)) {
        printf("interval interrupt event\n\r");
        //XTtcPs_SetMatchValue(Timer, 0, *MatchReg);
        }
    if (0 != (XTTCPS_IXR_MATCH_0_MASK & StatusEvent)) {
            printf("match interrupt event\n\r");
            //XTtcPs_SetMatchValue(Timer, 0, *MatchReg);
            }

}