nRF5 action!

NeverDie

What are the pin assignments when you have one linear list of pin names next to a double row of pins? In this case: https://www.aliexpress.com/item-img/NRF51822-pa-Bluetooth-module-external-antenna-module-column-industrial-self-timer-heart-rate-meter/32815682890.html?spm=2114.10010108.1000017.2.35e823afSFYACg

NeverDie

It's too bad Fanstel's shipping rates outside the US are high. I received the modules I ordered from Fanstel in just a couple of days. I'll try them out after I receive the PCB's from OSH PARK, which should happen in about another 1-2 weeks. The pinout for Fanstel's "micro" version (BC832) is different, and obviously the land pattern is much smaller, so I just now did a separate breakout board for it and sent it to the fab.

I'm trying to think now as to whether I'll have any future need for nRF24L01's. The very small and cheap nRF51822 seems to supplant it now with its 4dbm higher Tx power, and the nRF52 affords lower current consumption while in Tx or Rx, because of its DCDC option.

NeverDie

@d00616 Is it still the case that we're limited to a single interrupt? For instance, I'd like to put the nRF52832 to wake-up periodically as a heartbeat where it reports its battery level, and I also want it to wake-up if a particular pin goes HIGH (e.g. if a PIR sensor is triggered). Presently I'm using the RTC to provide the one interrupt, and I use the PPI to create an RTC interrupt if it detects that the PIR sensor pin has gone HIGH. Then the interrupt code must determine the true cause of the interrupt. It would be cleaner if I could separate them into separate interrupts. This is just a simple example to explain what I mean by the question.

Toyman

@NeverDie said in nRF5 Bluetooth action!:

It's too bad Fanstel's shipping rates outside the US are high

No issue for me as I am a using a mail forwarder(s) and I can highly recommend them to others. Bringing nrf52Dk from Arrow to Russia costed me $10 (inter-US shipping is free at Arrow).
I am considering switching to Fanstel modules completely, especially to their PA+LNA ones

d00616

@NeverDie said in nRF5 Bluetooth action!:

@d00616 Is it still the case that we're limited to a single interrupt? For instance, I'd like to put the nRF52832 to wake-up periodically as a heartbeat where it reports its battery level, and I also want it to wake-up if a particular pin goes HIGH (e.g. if a PIR sensor is triggered). Presently I'm using the RTC to provide the one interrupt, and I use the PPI to create an RTC interrupt if it detects that the PIR sensor pin has gone HIGH. Then the interrupt code must determine the true cause of the interrupt. It would be cleaner if I could separate them into separate interrupts.

You can wake up the MCU via:

GPIO pin sense; used for sleep()
GPIOTE; consumes less engergy but pin must be dedected in software (0.1µA-0.5µA)
LPCOMP (0.5µA)
QDEC (5µA)

The interrupts for LPCOMP and QDEC are not allocated by the arduino-port. I think the LPCOMP is a good point to start with.

Nca78

@Toyman said in nRF5 Bluetooth action!:

Bringing nrf52Dk from Arrow to Russia costed me $10 (inter-US shipping is free at Arrow).

Do they ask you for shipment fee directly to Russia ?
I'm in Vietnam and bringing nrf52DK from Arrow was free, like everything I order from them, and over US$20 it's even express shipment (By the way they have a 25% flash sale right now !)

I'm interested on info on your mail forwarder if it's not only for Russia.

Toyman

@Nca78 Arrow ships free to Russia, but only to companies, not to direct consumers this is linked to the fact they use couriers (DHL/Fedex) and not vanilla USPS.
Have a look at www.shipito.com, it's not the one I am currently using, but Shipito works with the whole world. Pricing might be a bit steep, but I haven't looked at it for a long time.

Toyman

http://blog.nordicsemi.com/getconnected/power-consumption-explained?utm_campaign=Blog update notifications&utm_source=hs_email&utm_medium=email&utm_content=57717514&_hsenc=p2ANqtz-9HxcPCGqL9z_8UZBj38TZu8vg-vE-JmEgmzOlt-uiiGj32PO4Vm0brgVaCxtEly5tGV5aioj1vJezIbGK_-xZVXV6zxQ&_hsmi=57717514

Omemanti

Had the nrf52dk shipped from arrow to the Netherlands. Because it was above 22 euro( something like that) DHL had to let it apply tax and some administration cost.

The board costed 28 euro(inc shipping). The tax office estimate was that is was around 120 euro??? so they charged me a little to much. I filled in some forms to get some of the taxes back.

When the board arrived I had to pay DHL 43 euro . So getting it though customes cost more than the board itself. 😏

Nca78

@Omemanti said in nRF5 Bluetooth action!:

When the board arrived I had to pay DHL 43 euro .
DHL is selling it's shipment service cheaper to shops so the cost seems interesting for buyer. But their trick is to force you to pay some "service fee" when you receive your parcel in addition to custom taxes. This is borderline scam IMHO as this fee is mandatory and has a fixed value for each destination country, so DHL should include it upfront when customer orders.
No more DHL shipment for me.

NeverDie

@d00616 said in nRF5 Bluetooth action!:

@NeverDie said in nRF5 Bluetooth action!:
@d00616 Is it still the case that we're limited to a single interrupt?  For instance, I'd like to put the nRF52832 to wake-up periodically as a heartbeat where it reports its battery level, and I also want it to wake-up if a particular pin goes HIGH (e.g. if a PIR sensor is triggered).  Presently I'm using the RTC to provide the one interrupt, and I use the PPI to create an RTC interrupt if it detects that the PIR sensor pin has gone HIGH.  Then the interrupt code must determine the true cause of the interrupt.  It would be cleaner if I could separate them into separate interrupts. 
You can wake up the MCU via:

GPIO pin sense; used for sleep()

GPIOTE; consumes less engergy but pin must be dedected in software (0.1µA-0.5µA)

LPCOMP (0.5µA)

QDEC (5µA)

The interrupts for LPCOMP and QDEC are not allocated by the arduino-port. I think the LPCOMP is a good point to start with.

I have it now where LPCOMP does detect pin AIN1 (i.e. pin P0.03) going HIGH, but it still doesn't wake-up the MCU, and the interrupt code never runs. I could use the PPI to trigger an RTC interrupt when it detects the NRF_LPCOMP->EVENTS_UP event, which would wake up the MCU, but then I'm back to square one. Is that the best that can be done given the current state of the software?

#define MY_CORE_ONLY

#include <nrf.h>
#include <MySensors.h>

uint32_t blinkCounter=0;
uint32_t interruptCounter=0;
bool button_pressed=false;

void setup() {
  Serial.begin(9600);
  Serial.println();
  Serial.println("Starting...");

  // Enable interrupt
  NVIC_SetPriority(LPCOMP_IRQn, 15);
  NVIC_ClearPendingIRQ(LPCOMP_IRQn);
  NVIC_EnableIRQ(LPCOMP_IRQn);

  hwPinMode(LED_BUILTIN,OUTPUT_H0H1);
  //hwPinMode(PIN_BUTTON1,INPUT);
  NRF_LPCOMP->PSEL=1; // monitor AIN1 (pin P0.03).
  while (!(NRF_LPCOMP->PSEL==1)) {} //wait until confirmed
  NRF_LPCOMP->REFSEL=3;  // choose 1/2 VDD as the reference voltage
  while (!(NRF_LPCOMP->REFSEL==3)) {} //wait until confirmed
  NRF_LPCOMP->INTENSET=B0100;  //Enable interrupt for UP event
  while (!(NRF_LPCOMP->INTENSET==B0100)) {} //wait until confirmed
  NRF_LPCOMP->ENABLE=1;  //Enable LPCOMP
  while (!(NRF_LPCOMP->ENABLE==1)) {} //wait until confirmed
  NRF_LPCOMP->TASKS_START=1;  //start the LPCOMP
  while (!(NRF_LPCOMP->EVENTS_READY)) {}  //wait until ready
}


void loop() {
  Serial.print(blinkCounter++);
  Serial.println("HIGH");
  digitalWrite(LED_BUILTIN,HIGH);
  delay(20);

/*
  if (NRF_LPCOMP->EVENTS_UP) {
    digitalWrite(LED_BUILTIN,HIGH);
    delay(2000);
    NRF_LPCOMP->EVENTS_UP=0;  //Clear the semaphore
  }
  */

  if (button_pressed) {
    digitalWrite(LED_BUILTIN,HIGH);
    delay(2000);
    button_pressed=false;  //Clear the semaphore
    NRF_LPCOMP->EVENTS_UP=0;  //Clear the semaphore
  }
  
  digitalWrite(LED_BUILTIN,LOW);
  hwSleep(5000);
}


// * Reset events and read back on nRF52
//* http://infocenter.nordicsemi.com/pdf/nRF52_Series_Migration_v1.0.pdf
 
#if __CORTEX_M == 0x04
#define NRF5_RESET_EVENT(event)                                                 \
        event = 0;                                                                   \
        (void)event
#else
#define NRF5_RESET_EVENT(event) event = 0
#endif


// This must be in one line
//extern "C" { void GPIO_IRQHandler(void) {interruptCounter++; NRF5_RESET_EVENT(NRF_RTC0->EVENTS_OVRFLW); NRF_RTC0->EVENTS_OVRFLW=0; }}
extern "C" { void LPCOMP_IRQHandler(void) {button_pressed=true; interruptCounter++; NRF5_RESET_EVENT(NRF_LPCOMP->EVENTS_UP); NRF_LPCOMP->EVENTS_UP=0; }}

NeverDie

Getting closer... The LPCOMP interrupt code does run, but the main loop doesn't resume until the RTC timer makes it resume because the programmed time interval has expired.

I know this is true because if, during sleep, I make AIN1 go HIGH, and then LOW, then when the MCU later wakes up because of the RTC, it so indicates by making the LED go HIGH for 2 seconds. However, even though there's now solid proof that the LPCOMP interrupt hardware does execute, the main loop doesn't immediately resume, as it does when the RTC times out.

So.... How to make the main loop immediately resume whenever LPCOMP goes UP?

NeverDie

Well, I have to re-build the timer part of this, and clean up the code, but at least now a PIR sensor trigger will immediately wake-up the MCU. That's progress! Unfortunately, current drawn during sleep is now 456ua, which is much higher than it should be.

#define MY_CORE_ONLY

#include <nrf.h>
#include <MySensors.h>

uint32_t rtcInterruptCounter=0;
uint32_t buttonPressInterruptCounter=0;
bool button_pressed=false;


void myHwSleepPrepare(unsigned long ms)
{
  // Idle serial device
  NRF_UART0->TASKS_STOPRX = 1;
  NRF_UART0->TASKS_STOPTX = 1;
  NRF_UART0->TASKS_SUSPEND = 1;
  //NRF_UART0->ENABLE=0;  //disable UART0

  //NRF_CLOCK->TASKS_HFCLKSTOP = 1;
  
  // Enable low power sleep mode
  NRF_POWER->TASKS_LOWPWR = 1;

}

// Sleep in System ON mode
inline void doTheSleep()
{
  __WFE();
  __SEV();
  __WFE();
}

void myHwSleepEnd(unsigned long ms)
{
  // Start HFCLK
  //if (nrf5_pwr_hfclk) {
  if (false) {
    NRF_CLOCK->EVENTS_HFCLKSTARTED = 0;
    NRF_CLOCK->TASKS_HFCLKSTART = 1;
    while (NRF_CLOCK->EVENTS_HFCLKSTARTED == 0)
      ;
    // Enable low latency sleep mode
    //NRF_POWER->TASKS_CONSTLAT = 1;
  }
}
 
void myHwSleep(unsigned long ms)
{
  myHwSleepPrepare(ms);
  doTheSleep();
  //now sleeping
  myHwSleepEnd(ms);

}


void setup() {
  //Serial.begin(9600);
  //Serial.println();
  //Serial.println("Starting...");

  
    // Enable interrupt
  NVIC_SetPriority(LPCOMP_IRQn, 15);
  NVIC_ClearPendingIRQ(LPCOMP_IRQn);
  NVIC_EnableIRQ(LPCOMP_IRQn);
  
  hwPinMode(LED_BUILTIN,OUTPUT_H0H1);
  //hwPinMode(PIN_BUTTON1,INPUT);
  NRF_LPCOMP->PSEL=1; // monitor AIN1 (pin P0.03).
  while (!(NRF_LPCOMP->PSEL==1)) {} //wait until confirmed
  NRF_LPCOMP->REFSEL=3;  // choose 1/2 VDD as the reference voltage
  while (!(NRF_LPCOMP->REFSEL==3)) {} //wait until confirmed
  NRF_LPCOMP->INTENSET=B0100;  //Enable interrupt for UP event
  while (!(NRF_LPCOMP->INTENSET==B0100)) {} //wait until confirmed
  NRF_LPCOMP->ENABLE=1;  //Enable LPCOMP
  while (!(NRF_LPCOMP->ENABLE==1)) {} //wait until confirmed
  NRF_LPCOMP->TASKS_START=1;  //start the LPCOMP
  while (!(NRF_LPCOMP->EVENTS_READY)) {}  //wait until ready

  //NRF_PPI->CH[0].EEP = (uint32_t)&NRF_LPCOMP->EVENTS_UP;  //If PIR sensor is triggered
  //NRF_PPI->CH[0].TEP = (uint32_t)&NRF_RTC0->TASKS_TRIGOVRFLW;  //make the RTC wake-up the MCU

  //NRF_PPI->CHENSET=B00000001; //enable Channel 0.
  
  NRF_RTC0->INTENSET = B10;  //interrupt MCU if an OVRFLW is detected.
  while (NRF_RTC0->INTENSET != B10) {}  //wait until confirmed

}


void loop() {
  //Serial.print(blinkCounter++);
  //Serial.println("HIGH");
  digitalWrite(LED_BUILTIN,HIGH);
  delay(20);

/*
  if (NRF_LPCOMP->EVENTS_UP) {
    digitalWrite(LED_BUILTIN,HIGH);
    delay(2000);
    NRF_LPCOMP->EVENTS_UP=0;  //Clear the semaphore
  }
  */

  if (button_pressed) {
    digitalWrite(LED_BUILTIN,HIGH);
    delay(2000);
    button_pressed=false;  //Clear the semaphore
    NRF_LPCOMP->EVENTS_UP=0;  //Clear the semaphore
  }
  
  digitalWrite(LED_BUILTIN,LOW);
  myHwSleep(5000);
}


// * Reset events and read back on nRF52
//* http://infocenter.nordicsemi.com/pdf/nRF52_Series_Migration_v1.0.pdf
 
#if __CORTEX_M == 0x04
#define NRF5_RESET_EVENT(event)                                                 \
        event = 0;                                                                   \
        (void)event
#else
#define NRF5_RESET_EVENT(event) event = 0
#endif


// This must be in one line
extern "C" { void RTC0_IRQHandler(void) {rtcInterruptCounter++; NRF5_RESET_EVENT(NRF_RTC0->EVENTS_OVRFLW); NRF_RTC0->EVENTS_OVRFLW=0; }}
extern "C" { void LPCOMP_IRQHandler(void) {button_pressed=true; buttonPressInterruptCounter++; NRF5_RESET_EVENT(NRF_LPCOMP->EVENTS_UP); NRF_LPCOMP->EVENTS_UP=0; }}

NeverDie

Aha! Most likely the high current draw is from the high frequency clock, which I need to turn off prior to sleep but haven't done yet.

NeverDie

Anyhow, the basic question remains and boils down to this: Can I have both

    // Enable interrupt
  NVIC_SetPriority(LPCOMP_IRQn, 15);
  NVIC_ClearPendingIRQ(LPCOMP_IRQn);
  NVIC_EnableIRQ(LPCOMP_IRQn);

AND an equivalent incantation for the RTC both active at the same time? Or am I forced into having it be just one or the other?

ahmedadelhosni

@NeverDie Did you manage to get more than 10m ? maybe by another modules.

I thought the nrf52 will have better range !

ahmedadelhosni

@Uhrheber I am a bit confused. To program the nRF52 from eByte I need a special programmer but they are expensive. So you mean you used a clone StLink V2 and it worked fine ?

I found this.

https://www.aliexpress.com/item/Hot-Sale-1PCS-ST-LINK-Stlink-ST-Link-V2-Mini-STM8-STM32-Simulator-Download-Programmer-Programming/32343514985.html?spm=2114.search0104.3.26.LR8eH0&ws_ab_test=searchweb0_0,searchweb201602_1_10152_10065_10151_10344_10068_10345_10342_10174_10343_10340_10341_10541_10084_10083_10307_10060_10155_10154_10056_10055_10539_10538_10537_10312_10536_10059_10313_10314_10534_10533_10317_10318_100031_10103_10073_10102_10142_10107-10318,searchweb201603_30,ppcSwitch_4&btsid=f4d09b48-5aa7-4688-b0e9-a02d8227ed05&algo_expid=2d114a26-895f-4334-aad3-f372504ef95c-3&algo_pvid=2d114a26-895f-4334-aad3-f372504ef95c

Uhrheber

@ahmedadelhosni
Sure, I'm using a similar one.
Why wouldn't it work? The nrf52 is an ARM Mx, like the ST chips. The programming interface is the same. You could also use one of the many other ARM programmers, like J-Link, or nearly any JTAG programmer supported by OpenOCD.

Just follow this guide: https://www.openhardware.io/view/376/MySensors-NRF5-Platform
And: https://github.com/sandeepmistry/arduino-nRF5/#installing

ahmedadelhosni

@Uhrheber Great. Thanks for the help.

So if I understand well. If I have a TIVA board like TM4C123G Launchpad and it is ARM Mx also, then I can use it to program my nRF ?

This is the datasheet for the board : http://www.ti.com/lit/ug/spmu296/spmu296.pdf

I searched and found those links describing how to use the Launchad but I am not sure whether this will work for nRF also or not.

http://processors.wiki.ti.com/index.php/Stellaris_LM4F120_LaunchPad_Debug_How_To
http://ucsolutions.blogspot.com.eg/2014/08/ti-launchpad-as-external-debugger-with.html

Thanks.

Nca78

@ahmedadelhosni said in nRF5 Bluetooth action!:

@Uhrheber Great. Thanks for the help.

So if I understand well. If I have a TIVA board like TM4C123G Launchpad and it is ARM Mx also, then I can use it to program my nRF ?

This is the datasheet for the board : http://www.ti.com/lit/ug/spmu296/spmu296.pdf

I searched and found those links describing how to use the Launchad but I am not sure whether this will work for nRF also or not.

http://processors.wiki.ti.com/index.php/Stellaris_LM4F120_LaunchPad_Debug_How_To
http://ucsolutions.blogspot.com.eg/2014/08/ti-launchpad-as-external-debugger-with.html

Thanks.

I think it's a question of the licence of the programmer that is on your board.
For example the J-Link version on the NRF52 DK is only allowed to program NRF52 and NRF51 chips. It's logic because the NRF52DK is just over 30$ while a J-Link programmer is x00$.
You have pins SWDIO and SWDCLK on pins PC0 and PC1 of your board so just try it and you will know :)

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