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Last activity 2017-08-12 12:14:31 +0200 by Ravi Upadhyaya

328P does not wakeup when PRX IRQ is asserted by NRF24L01

Has any-one been successful waking up a sleeping 328P via a NRF24L01 PRX IRQ interrupt?? My scenario is as below. Establishing a two way communication between two arduino boards. One is a central-panel and the other is a node with ... (more)

56
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2
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Last activity 2017-07-18 13:21:32 +0200 by Andrew

nRF24L01 IRQ pin jitter on two modules in RX mode

Hello! I try to use three modules with chip nRF24L01 to syncronize two slave devices by one master device without wires. Required accuracy is about 10 nanoseconds. My idea is to send packet by master module, receive it by slave ... (more)

336
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2
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Last activity 2017-06-02 14:28:22 +0200 by Jay S.

spi missing interrupts

I am using NRF51422 S130. I have a master SPI configuration set up, and not using Nordic spi drivers provided in the examples. I think my configuration is correct.

1- I send one byte of data at 2Mbips clock rate ... (more)

54
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Last activity 2017-04-12 05:45:15 +0100 by Haruki Kawakami

spi interrupt doesn't work in BLE event using SDK13.0.0

Hi,

I'm working on migration from project based on SDK12.1.0, 132SD3.0.0 (calling A project) to the one based on SDK13.0.0, 132SD4.0.2 (calling B project). I developed the project by adding codes ... (more)

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1
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1
answer
Last activity 2017-04-05 05:32:59 +0200 by Daniel T. Lee flag of Korea, Republic of

does UART is interrupted by BLE SEQUENCE?

Q0. What IRQ Priority does BLE Has? and also what IRQ Priority does UART can have?

I'm guessing that from s130's document P65, Exception Model, It says,
Softdevice Timing Critical has Cortex M0 priority 0,
Application Interrupt priority ...

(more)

95
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1
vote
1
answer
Last activity 2017-03-07 19:51:18 +0100 by Erlend

IRQ Handler for Radio - not entered

I'm trying to enable interrupt for radio events.

I have this code in main:

bsp_board_leds_init();
(...)
NRF_RADIO->INTENSET = 1 << RADIO_INTENSET_READY_Pos;
NRF_RADIO->TASKS_TXEN = 1;
while(1) {}

And I have defined this function:

void RADIO_IRQHandler(void) {
  bsp_board_led_invert(LED_2);
  int a = 0;
}

The ... (more)

184
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Last activity 2016-08-20 00:17:14 +0100 by Don Collier

UART IRQ stops firing after string received and one character transmitted

  1. I can send a CR terminated string through the UART using tx fifo OK.
  2. BUT, if I receive a string from the UART rx OK first, and then try to send a string, only the 1st character is transmitted through ...
(more)

194
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1
answer
Last activity 2016-08-12 05:47:13 +0100 by John Lee

GPIOTE manual clear

Hello,

I am working with the GPIOTE library to get a GPIOTE_IRQ from a peripheral.

I have several questions regarding the library and how IRQ works.

1.How do I clear the event for the gpiote input. I know that ... (more)

280
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4
votes
1
answer
Last activity 2016-05-13 14:34:11 +0200 by Martin Børs-Lind flag of Norway

Can ble_nus_string_send() be called from a TWI callback?

Calling ble_nus_string_send() from within a TWI callback (case NRF_DRV_TWI_EVT_DONE) is performing a reset on my PCA10028 (nRF51422). It works fine from the main loop.

Am I right in assuming that BLE operations cannot be issued from such callbacks? But on ... (more)

207
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no
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1
answer
Last activity 2016-04-20 14:10:35 +0200 by Stefan Birnir Sverrisson flag of Iceland

how to set high priority to push button

I'm using nrf51822. I have a program which shut down the system when the button is clicked. however, not every time I click the button, the system respond. my system is full of other events (interrupts). the BUTTON_DETECTION_DELAY is ... (more)

959
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1
vote
1
answer
Last activity 2016-03-03 12:34:00 +0200 by Fabien Comte flag of France

Debug and old IRQ [closed]

Hello, When I restart my application with debugger, i have strange IRQs called (TWI, ...) before init. Possibly IRQ still active and debug don't touch them.

Can I disable all IRQ on restart ? Is there a magic cleaning function ? :-)

129
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2
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1
answer
Last activity 2016-01-27 17:27:27 +0100 by RK flag of Singapore

irq latency with softdevice

Hi,

My goal is to capture on gpio burst infrared proprietary "messages" composed of multiple "bits". The Length of each bit is around 100 to 200us.

Initially I planned to use timer1 and timer2 to capture the low and high ... (more)

297
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no
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1
answer
Last activity 2016-01-13 16:38:45 +0200 by Stefan Birnir Sverrisson flag of Iceland

Different IRQ priority levels

Hi,

system info:

  • SDK: v6.0.0.43681
  • S110 V7.0.0
  • nRF51822 Rev.2

I’m using a ~4ms one shot timer (using the timer library) which is being started in the RADIO_NOTIFICATION_IRQHandler(). In the timer_timeout_handler() I’m starting ... (more)

1k
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2
votes
1
answer
Last activity 2015-08-12 09:51:17 +0200 by Krzysiek

NRF51822 Interrupt Service Routine handling

Hello, I was using wiringPiSPI() to connect via SPI and so i was using wiringPiISR function to create an interupt handler that will do callback to the user suplied function. Now I moved to module with NRF architecture. How can ... (more)

904
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1
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2
answers
Last activity 2015-07-11 09:08:47 +0100 by curiousmech

ADC_IRQHandler specific calling

Hi, I am new to nordic n51822, i have implemented adc and timer independently. Now, what i want to do is read the adc values on a specific time when the timer overflows for 500ms. I am little confused that ... (more)

338
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answers
Last activity 2015-02-11 01:27:47 +0200 by Moloch flag of United States

Can BLE and SoC events cause SD_EVT_IRQn simultaneously?

Hello everybody,

In the SD_EVT_IRQn ISR I check for BLE and SoC events and set flags for each so my application can fetch and dispatch the events in the main context.

Because SD_EVT_IRQn can be caused by both SoC and ... (more)

575
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6
votes
1
answer
Last activity 2015-02-10 09:40:22 +0200 by Hung Bui

MBR Vector Table

I never worked with Cortex M0 before so I wonder how it's possible to jump to correct IRQ handler when I have my own bootloader and application which are using e.g. UART IRQ both.

I understand that Cortex ... (more)

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