UART INTERRUPT

[Shorosky]

Hello: Im using SDK 10 with softdevice V130. Im opening UART:

uint32_t err_code; 

const app_uart_comm_params_t comm_params =
   {
       RX_PIN_NUMBER,
       TX_PIN_NUMBER,
       RTS_PIN_NUMBER,
       CTS_PIN_NUMBER,
       APP_UART_FLOW_CONTROL_DISABLED,
       false,
       UART_BAUDRATE_BAUDRATE_Baud38400
   };

APP_UART_FIFO_INIT(&comm_params,
                      UART_RX_BUF_SIZE,
                      UART_TX_BUF_SIZE,
                      NULL,
                      APP_IRQ_PRIORITY_LOW,
                      err_code);

APP_ERROR_CHECK(err_code);

To communicate with another microcontroller. NRF has the control to switch on and off the second microcontroller, and I have the following problem: If the slave microcontroller is switched off, the RX pin of the NRF has low state and NRF go to loop while (1). I have solved it with the following instruction after the uart init: nrf_gpio_cfg_input(RX_PIN_NUMBER, NRF_GPIO_PIN_PULLUP); But I guess that it is not the best way to solve it. should I disable uart interrupt? (I don't need uart interrupt on my program) how must I do it?

I can't put an external pull up.

Thank you.

[Ole Bauck]

Configuring internal pullup on RX is the best way to solve it.

[Shorosky]

Thank you, Ole. I'll do it.

[vishal]

hello sir, i have still same problem on my RX pin. please let me know how to configure internal pullup on RX pin in programming. I am using SDK13.1 and S132 softdevice in eclipse.

[Lajgaard]

NRF_P0->PIN_CNF[16] |= ( GPIO_PIN_CNF_PULL_Pullup << GPIO_PIN_CNF_PULL_Pos );

that is how i make sure that my pin is pulled up