please clarify UART / UART0 in SDK

[danmcb]

in sdk_config.h  it says this

// <e> NRFX_UART_ENABLED - nrfx_uart - UART peripheral driver
//==========================================================
#ifndef NRFX_UART_ENABLED
#define NRFX_UART_ENABLED 1
#endif
// <o> NRFX_UART0_ENABLED - Enable UART0 instance 
#ifndef NRFX_UART0_ENABLED
#define NRFX_UART0_ENABLED 0
#endif

on page 24 of the nRF52832 datasheet, it seems that UART and UARTE cannot both be used (they share the same ID). Is this correct? effectively only one UART on this device? and then what do UART and UART0 refer to in the sdk config?

thank you

[Simonr]

Hi

I understand the confusion, but no these defines aren't exactly the same. As the driver ENABLE define won't specify what instance to use in the UART drivers/libraries of the SDK. Both NRFX_UART_ENABLED and NRFX_UART0_ENABLED should be set to 1.

Our example projects in the nRF5 SDK use the UART_ENABLED and UART0_ENABLED defines by default, as they use the nrf_drv_uart driver to enable the UART and UART instance by default. 

Best regards,

Simon

[danmcb]

ok! I will take that advice! thank you! all the best.