topic Re: imx1170 ENET IRQHandler in i.MX Processors

imx1170 ENET IRQHandler

Haha_plum — Fri, 10 Nov 2023 06:28:54 GMT

Recently I had some problems with the ENET 1588 timer, I set the timer to output comparison mode, but I looked at the manual and found that the ENET module only has two timestamp related interrupts, Transmit Timestamp Available and Timestamp Timer, corresponding to the ENET_TimeStampIRQHandler() and ENET_ TransmitIRQHandler() in enet.c , and ENET_TimeStampIRQHandler can only enter once a second for second timing, I want to implement multiple comparisons for one channel in a second. I currently found another function ENET_Ptp1588IRQHandler(), I want to know ENET_Ptp1588IRQHandler() and ENET_ TimeStampIRQHandler() and how to achieve the above multiple output comparisons.

Looking forward to answers

Re: imx1170 ENET IRQHandler

jingpan — Mon, 13 Nov 2023 09:24:26 GMT

Hi @Haha_plum ,

Have you referred to enet_txrx_ptp1588_transfer demo in SDK? ENET_Ptp1588IRQHandler() and TimeStampIRQHandler() has been enabled in ENET_Ptp1588ConfigureHandler().

ENET_EnableInterrupts(base, (ENET_TS_INTERRUPT | ENET_TX_INTERRUPT));

The ENET_TS_INTERRUPT is ((uint32_t)kENET_TsTimerInterrupt | (uint32_t)kENET_TsAvailInterrupt).

These two source will generate interrupt and call ENET_Ptp1588IRQHandler(). And ENET_Ptp1588IRQHandler will call TimeStampIRQHandler().

ENET module has 4 TCC register will has compare function.When the ENET free-running counter value matches the output compare reference value in the TCCRn register, the corresponding flag, TCSRn[TF], is set, indicating that an output compare has occurred. The corresponding interrupt, if enabled by TCSRn[TIE], will be generated. Please see 60.3.8.6.2 in reference manual.

Regards,

Jing

Re: imx1170 ENET IRQHandler

Haha_plum — Tue, 14 Nov 2023 03:30:08 GMT

@jingpan

Hi,jing.

Thank you very much for your reply.

I have referred to the demo in SDK.As you said, ENET_ Ptp1588IRQHandler is triggered and only appears TS_ AVAIL or the adjustable timer reached the period event.Then ENET_Ptp1588IRQHandler will call TimeStampIRQHandler().

I know the mechanism of TCCRn and TCSRn register.

For example, what I want to achieve is to set a GPIO to 1 after the first comparison on a channel, then set the second comparison value, reverse the GPIO, and then set the last comparison value. If these comparison values are separated by 100000 (1588timer cycle is 10 ^ 9=1s), and the corresponding comparison interrupts are generated, where should I write these codes? TimeStampIRQHandler() is triggered every second, which cannot meet my requirements, So I should put it in ENET_Ptp1588IRQHandler() or other functions?

Looking forward to your reply.

With best wishes!

Re: imx1170 ENET IRQHandler

jingpan — Wed, 15 Nov 2023 08:06:40 GMT

Hi @Haha_plum ,

You can add code in ENET_Ptp1588Handler() directly. Check TCSRn[TF]. If it is set, it indicate that an output compare has occurred.

We haven't such sample code.

Regards,

Jing

Re: imx1170 ENET IRQHandler

Haha_plum — Thu, 16 Nov 2023 00:24:25 GMT

Hi,@jingpan

I will give it a try.

Thank you for your reply.

Re: imx1170 ENET IRQHandler

Haha_plum — Mon, 18 Dec 2023 02:39:49 GMT

@jingpan

Hi,I'm so sorry to disturb you again after such a long time.Continuing with the previous description.

Is the interrupt corresponding to 142 in the interrupt vector table a comparison interrupt of ptp1588 timer? What does the explanation of MAC 0 1588 Timer Interrupt synchronous correspond to 142 in the interrupt vector table in the figure?