What does nrf52840_peripherals library do exactly?

[masterLee]

Hi, 

could you please explain me what nrf52840_peripherals library (located in nrfx folder) is actually doing and what do the numbers next to the definitions mean ?

I see for example the following

/* Two Wire Interface Master with DMA */
#define TWIM_PRESENT
#define TWIM_COUNT 2

What does number two mean, next to the TWIM_COUNT?

Also what is the meaning of COUNT?

Thank you

[awneil]

masterLee said:

what nrf52840_peripherals library (located in nrfx folder) is actually doing

https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v15.2.0/group__drivers.html?cp=4_0_0_6_9

masterLee said:

Also what is the meaning of COUNT?

You count sheep to find out how many sheep you have. The final count is the total number of sheep.

TWIM_COUNT is the total number of TWI Master instances available.

This means that the library can easily be ported to different chips which might have different numbers of TWIM instances available.

[bjorn-spockeli]

Hi Kostoulas, 

the nrf52840_peripherals.h file simply contains definitions used by the drivers, e.g. how many TWI,SPI and UART peripherals that are available on the nRF52840. 

Best regards

Bjørn 

[awneil]

masterLee said:

nrf52840_peripherals library

bjorn-spockeli said:

nrf52840_peripherals.h file

masterLee - note that a header (.h) file is not a "library"

[masterLee]

I just call them libraries in general. Bad habit coming from the past :-p

Thank you for the notice though

[masterLee]

Thank you Bjørn !