How to disable and enable UART at runtime?

[Yusuke]

I want to disable and enable UART at runtime. I don't use DMA and interrupt.

I read this thread.
https://devzone.nordicsemi.com/f/nordic-q-a/52496/nrf9160-uart-pull-up-and-power-consumption/216096#216096

I tried this code but doesn't work. Any help?

Fullscreen

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

#define TXD_PIN 24

void enable_uart(){

NRF_UARTE3->ENABLE = 8;

NRF_UARTE3->TASKS_STARTTX = 1;

NRF_UARTE3->TASKS_STARTRX = 1;

}

void disable_uart(){

NRF_UARTE3->TASKS_STOPRX=1;

while(NRF_UARTE3->EVENTS_RXTO == 0);

NRF_UARTE3->EVENTS_RXTO = 0;

NRF_UARTE3->TASKS_STOPTX = 1;

while(NRF_UARTE3->EVENTS_TXSTOPPED == 0);

NRF_UARTE3->EVENTS_TXSTOPPED = 0;

NRF_UARTE3->ENABLE = 0;

NRF_UARTE3->PSEL.TXD = 0xFFFFFFFF;

NRF_P0_NS->OUTCLR = (1 << TXD_PIN);

}

XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

#define TXD_PIN 24

void enable_uart(){
	NRF_UARTE3->ENABLE = 8;
	NRF_UARTE3->TASKS_STARTTX = 1;
	NRF_UARTE3->TASKS_STARTRX = 1;
}

void disable_uart(){
	NRF_UARTE3->TASKS_STOPRX=1;
	while(NRF_UARTE3->EVENTS_RXTO == 0);
	NRF_UARTE3->EVENTS_RXTO = 0;

	NRF_UARTE3->TASKS_STOPTX = 1;
	while(NRF_UARTE3->EVENTS_TXSTOPPED == 0);
	NRF_UARTE3->EVENTS_TXSTOPPED = 0;

	NRF_UARTE3->ENABLE = 0;
	NRF_UARTE3->PSEL.TXD = 0xFFFFFFFF;
	NRF_P0_NS->OUTCLR = (1 << TXD_PIN);
}

Thanks!