running TWO LIBUARTE - RX not working on LIBUARTE0

[bitmick]

Hi All,

I am trying to run two UARTS using LIBUARTE.

this is the relevant configuration:

#define NRF_LIBUARTE_ASYNC_WITH_APP_TIMER 1
#define NRF_LIBUARTE_DRV_UARTE0 1
#define NRF_LIBUARTE_DRV_UARTE1 1

#define NRFX_RTC_ENABLED 1
#define NRFX_RTC0_ENABLED 1
#define NRFX_RTC1_ENABLED 0
#define NRFX_RTC2_ENABLED 1

#define NRFX_TIMER_ENABLED 1
#define NRFX_TIMER0_ENABLED 1
#define NRFX_TIMER1_ENABLED 1
#define NRFX_TIMER2_ENABLED 1
#define NRFX_TIMER3_ENABLED 1
#define NRFX_TIMER4_ENABLED 0

NRF_LIBUARTE_ASYNC_DEFINE(uarte0, 0, 1, 1, NRF_LIBUARTE_PERIPHERAL_NOT_USED, 512, 3);
NRF_LIBUARTE_ASYNC_DEFINE(uarte1, 1, 2, 2, NRF_LIBUARTE_PERIPHERAL_NOT_USED, 512, 3);

UART1 working perfect. TX + RX.
UART0: only TX is working. getting no bytes. 
tried loopback, switched various pins.

tried running only UART0. no better results.
what am I doing wrong?

any help will be greatly appreciated!
Thanks!
    Mickey

[bitmick]

OK,

I did try various pins. what I did not test is to switch the TX pin with RX, and then I saw that the RX does work (but then the TX does not

so I went through and tested until I found a valid pin

probably some dead pins on my EVK.

Thanks!
Mickey

[Vidar Berg]

Hi Mickey,

Thanks for updating the ticket! So there are some pins on the DK that are not routed out to the pin headers by default. Could that be it? P0.9 and P0.10 used for NFC are for instance connected to the antenna port as shown by the silkscreen on the backside.

[Pham Tam]

NRF_LIBUARTE_ASYNC_DEFINE(uarte0, 0, 1, 1, NRF_LIBUARTE_PERIPHERAL_NOT_USED, 512, 3);
NRF_LIBUARTE_ASYNC_DEFINE(uarte1, 1, 2, 2, NRF_LIBUARTE_PERIPHERAL_NOT_USED, 512, 3);

Hi, I configed like above. But when i added the second line of code i got this error message

I dont know why.? Please help me. Thank in advance.

[Pham Tam]

the problem was solved, because I use the example of pca10040 instead of pca10056. I just change to pca10056  (nrf52840 have 2 Uart ) and my code was worked