Using PPI trace with Timer0

Hi,

Is there any update on the situation ?

Hey,

Really sorry for the late response. 

c.tessierpiart said:

ret = gpio_pin_configure_dt(&filtered_synchro  , GPIO_INPUT | GPIO_INT_DEBOUNCE); 

sends the application into hardfault.

Could you tell me what it looks like when this happens.? Also, let me know how to reproduce the issue on my side.

Regards,

Swathy

Hi,

It has been a while and I managed to make my IOs work. I just used DT_NODELABAL instead of DT_ALIAS, dont know why it works and at this point I am too afraid to ask.

Meanwhile, I tried your suggestion but on my main application the counter start makes it restart and on the exemple that I modified, there is no more output signal.

Here is the modified sample : 

/*
 * Copyright (c) 2019 Nordic Semiconductor ASA
 *
 * SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
 */

#include <zephyr.h>
#include <debug/ppi_trace.h>
#include <drivers/counter.h>
#include <hal/nrf_rtc.h>
#include <hal/nrf_clock.h>
#include <device.h>
#include <logging/log.h>
#include "hal/nrf_timer.h"

LOG_MODULE_REGISTER(app);

#define ALARM_PERIOD_US 50000

#if IS_ENABLED(CONFIG_USE_TIMER2)
#define TIMER       NRF_TIMER2
#define TIMER_LABEL DT_LABEL(DT_NODELABEL(timer2))
#else
#define TIMER       NRF_TIMER3
#define TIMER_LABEL DT_LABEL(DT_NODELABEL(timer3))
#endif

static void alarm_callback(const struct device *dev, uint8_t chan_id, uint32_t ticks,
			   void *user_data);

static struct counter_alarm_cfg alarm_cfg = {
	.callback = alarm_callback,
	.flags = COUNTER_ALARM_CFG_ABSOLUTE,
};

static void ppi_trace_pin_setup(uint32_t pin, uint32_t evt)
{
	void *handle;

	handle = ppi_trace_config(pin, evt);
	__ASSERT(handle != NULL,
		"Failed to initialize trace pin, no PPI or GPIOTE resources?");

	ppi_trace_enable(handle);
}

static void ppi_trace_setup(void)
{
	ppi_trace_pin_setup(3,
		nrf_timer_event_address_get(TIMER, NRF_TIMER_EVENT_COMPARE0));

	LOG_INF("PPI trace setup done.");
}

static void alarm_callback(const struct device *dev, uint8_t chan_id,
			   uint32_t ticks, void *user_data)
{
	int err;
	uint32_t alarm_cnt = (uint32_t)user_data + 1;

	alarm_cfg.ticks = ticks + counter_us_to_ticks(dev, ALARM_PERIOD_US);
	alarm_cfg.user_data = (void *)alarm_cnt;

	err = counter_set_channel_alarm(dev, 0, &alarm_cfg);
	__ASSERT_NO_MSG(err == 0);
	(void)err;
}

static void counter_setup(void)
{
	int err;
	const struct device *dev = device_get_binding(TIMER_LABEL);

	__ASSERT(dev, "Sample cannot run on this board.");

	alarm_cfg.ticks = counter_us_to_ticks(dev, ALARM_PERIOD_US);
	err = counter_set_channel_alarm(dev, 0, &alarm_cfg);
	__ASSERT_NO_MSG(err == 0);

	err = counter_start(dev);
	__ASSERT_NO_MSG(err == 0);
}

void main(void)
{
	ppi_trace_setup();
	counter_setup();
}

Note that, until I replaced the RTC and rtc reference with TIMER and timer references, it worked fine.

Best regards, Charles

Hi,

I was away on vacation and hence couldn't get back to you sooner.. I can see that you have managed to make the IO's work. What is the current update of this issue.?

Regards,

Swathy