NRF58232/SDK15 Where can I find sample code to use NRFX_UARTE ?

[MPS]

Hi,

I'm looking for an example of how NRFX_UARTE works.

I would like to set up a serial port with EasyDMA to send and receive a thirty bytes.

Thanks in advance for your help.

Best regards, 

[awneil]

Do you mean the Nordic UART Service - NUS?

The examples appear under the SDK in the Infocenter; eg, 

http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v15.0.0/examples_ble.html - Central

http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v15.0.0/examples_ble.html - Peripheral

[MPS]

Hi awneil,

Thanks for your answer but I don't want send and receive bytes by BLE, just with serial port. 

I need to use UARTE, not BLE Service NUS.

[MPS]

I don't understand how to get all the interruption that I wish as an event in the handler.

For example, how to be informed of RXSTARTED for load another buffer as seen in Figure 95 of the nRF52832 datasheet.

If I use another way of doing this, for example :

    NRF_UARTE0->ENABLE = (UARTE_ENABLE_ENABLE_Enabled << UARTE_ENABLE_ENABLE_Pos);
    NRF_UARTE0->BAUDRATE=NRF_UARTE_BAUDRATE_115200;
    NRF_UARTE0->PSEL.RXD=RX_PIN_NUMBER;
    NRF_UARTE0->PSEL.TXD=TX_PIN_NUMBER;
    NRF_UARTE0->CONFIG=NRF_UARTE_HWFC_DISABLED;
 
    NRF_UARTE0->TXD.PTR = (uint32_t)((uint8_t *)txUarteBuffer);
    NRF_UARTE0->TXD.MAXCNT = sizeof(txUarteBuffer);
    NRF_UARTE0->TASKS_STARTTX = 0;

    NRF_UARTE0->RXD.PTR = (uint32_t)((uint8_t *) rxUarteBuffer);
    NRF_UARTE0->RXD.MAXCNT = sizeof(rxUarteBuffer);
    NRF_UARTE0->TASKS_STARTRX = 1;

How to create an handler for event ?

if I use : 

    NRF_UARTE0->INTENCLR = 0xFFFFFFFF;
    NRF_UARTE0->INTENSET = NRF_UARTE_INT_ENDRX_MASK;
    NVIC_ClearPendingIRQ(UARTE0_UART0_IRQn);
    NVIC_SetPriority(UARTE0_UART0_IRQn, NRFX_UARTE_DEFAULT_CONFIG_IRQ_PRIORITY);
    NVIC_EnableIRQ(UARTE0_UART0_IRQn);

I have : 

<error> app: ERROR 3735928559 [Unknown error code] at .......\modules\nrfx\drivers\src\prs\nrfx_prs.c:81

PC at: 0x0002C49F

<error> app: End of error report

Someone can help me ?

Thanks in advance.

Best regards,

[Håkon Alseth]

Hi,

 

It looks like you are mixing bare metal implementation, and using the nrfx_uarte driver. You must disable the nrfx_uarte module in order to use the UARTE peripheral directly.

 

Best regards,

Håkon

[MPS]

Hi Hakon,

Thanks for your help.

For disabling nrfx, I need to modify sdk_config.h and not included nrfx_uarte.h ?

I need to include just "nrf_uarte.h" ?

How to create UARTE0_UART0_IRQ in my main software ?

Sorry for all these questions, but I feel like going round with all these UART driver ...

Best regards,

[Håkon Alseth]

You need to edit your sdk_config.h file, and set:

#define NRFX_UARTE_ENABLED 0

and

#define NRFX_UART_ENABLED 0

 

After this, you implement your interrupt handler:

 

void UARTE0_UART0_IRQHandler(void)
{
    // Code
}

 

 

Best regards,

Håkon

[MPS]

Ok.

I include only "nrf_uarte.h"

and with void UARTE0_UART0_IRQHandler(void) I have an error : 

1> main.o: In function `UARTE0_UART0_IRQHandler':
1> main.c:729: multiple definition of `UARTE0_UART0_IRQHandler'
1> Nordic_BLE\nRF5_SDK_15.0.0\modules\nrfx\drivers\src/nrfx_uarte.c:571: first defined here

If I keep NRFX_PRS_ENABLED = 1 and NRFX_PRS_BOX_4_ENABLED 1, I have an error : 

1> main.o: In function `UARTE0_UART0_IRQHandler':
1> main.c:728: multiple definition of `UARTE0_UART0_IRQHandler'
1> Nordic_BLE\nRF5_SDK_15.0.0\modules\nrfx\drivers\src\prs/nrfx_prs.c:81: first defined here

[Håkon Alseth]

 

Did you set this in your sdk_config.h file and re-compile the whole project (clean first, then build)?

#define NRFX_UARTE_ENABLED 0

 

The first error is because nrfx_uarte.c is still enabled, and the second is due to the "nrfx_prs" library being used by nrfx_uarte is in use.

 

 

Best regards,

Håkon

[MPS]

I have : 

NRFX_UARTE_ENABLED 0

NRFX_UARTE0_ENABLED 0

NRFX_UART_ENABLED 0

NRFX_UART0_ENABLED 0

UART_ENABLED 1

UART_EASY_DMA_SUPPORT 1

UART_LEGACY_SUPPORT 0

UART0_ENABLED 1

UART0_CONFIG_USE_EASY_DMA 1

NRFX_PRS_ENABLED 1

NRFX_PRS_BOX_4_ENABLED 1

[Håkon Alseth]

Could you try to remove the nrfx_uarte.c and nrfx_prs.c from your project and see if it works then?

[MPS]

Thank you, it seems to work now. I test it all and come back here to say if everything is ok.
I will not have compatibility problems with future SDKS?

[Håkon Alseth]

Glad to hear that it works now.

A general rule is that as long as you do not add or use any modules that depends on the UART peripheral, it should be fine. As you're doing a bare-metal implementation, it is _very unlikely_ that the register definitions will ever change for the current device that you are using.

However; I cannot guarantee that a module that you require in the future does not depend on the UART in some way (for logging or similar).

 

Best regards,

Håkon