nRF9160 UART

RE: nRF9160 UART

fatalfeel — Sat, 03 Apr 2021 22:13:53 GMT

nRF Connect SDK 1.5.99 Nrf9160 uart port to external pin and source code share
fatalfeel.blogspot.com/.../nrf9160-uart-port-to-external-pin.html

RE: nRF9160 UART

cdugue — Mon, 01 Apr 2019 13:36:24 GMT

That worked, thank you very much.

RE: nRF9160 UART

Hakon — Thu, 21 Mar 2019 09:38:34 GMT

One thing you can try is to add CONFIG_BSD_LIBRARY_TRACE_ENABLED=n in prj.conf.

RE: nRF9160 UART

cdugue — Thu, 14 Mar 2019 18:22:31 GMT

Sure. I also tried sending data from the nRF52840 to the nRF9160 through UART and the same thing happens, I only get 0 or 128 as data.

In the main of the MQTT sample I added the following initialization for UART:

struct device *uart = device_get_binding("UART_1");
if (!uart) {
    printk("error\r\n"); // error happens.
}

uart_irq_callback_set(uart, uart_cb);
uart_irq_rx_enable(uart);
printk("UART loopback start!\n");

The UART callback:

void uart_cb(struct device *x)
{
  uart_irq_update(x);
  int data_length = 0;

  if (uart_irq_rx_ready(x)) {
    data_length = uart_fifo_read(x, uart_buf, sizeof(uart_buf));
    uart_buf[data_length] = 0;
  }

  printk("data_length %d - ", data_length);
  printk("%d (", uart_buf[0]);
  printk("%s)\n", uart_buf);
}

The UART buffer:

static u8_t uart_buf[1024];

In the project config file I added:

CONFIG_SERIAL=y
CONFIG_UART_1_NRF_UARTE=y

Thank you.

RE: nRF9160 UART

Hakon — Thu, 14 Mar 2019 14:14:26 GMT

[quote user="cdugue"]Isn't UART0 used for printk?[/quote]

Yes I was wrong apparently. I just checked in autoconf.h, and found #define CONFIG_UART_CONSOLE_ON_DEV_NAME "UART_0".

[quote user="cdugue"]I am running the mqtt_simple example with code from the UART example when I get the error.[/quote]

Do you mind sharing your code, so I can see exaclty what you are doing?

RE: nRF9160 UART

cdugue — Wed, 13 Mar 2019 10:36:02 GMT

Isn't UART0 used for printk?
I am running the mqtt_simple example with code from the UART example when I get the error.

RE: nRF9160 UART

Hakon — Tue, 12 Mar 2019 13:58:05 GMT

I believe UART1 is used by printk(I might be wrong). In that case you would receive and send on the same COM port. Are you running the UART example or the mqtt_simple example when you get the error? The prj.conf file should be fine.

RE: nRF9160 UART

cdugue — Tue, 12 Mar 2019 12:33:32 GMT

I am trying to add the UART example to the mqtt_simple example and chose to use the UART1.

What are the necessary changes to prj.conf?

I have:
CONFIG_SERIAL=y
CONFIG_UART_INTERRUPT_DRIVEN=y
CONFIG_UART_1_NRF_UARTE=y

But I don't have:
CONFIG_TRUSTED_EXECUTION_NON_SECURE=y

Thanks.

RE: nRF9160 UART

Hakon — Tue, 12 Mar 2019 10:10:47 GMT

Hey,

have you made any modifications to the example code? Also, have you made the necessary changes to prj.conf?