n51822 DTM Settings?

RE: n51822 DTM Settings?

Jørgen Holmefjord — Tue, 26 Mar 2019 08:49:48 GMT

You need to compile/build the project after you have modified the main.c file. Build process will generate a new hex-file that you flash to the board. See the gettings started section in the SDK documentation.

RE: n51822 DTM Settings?

SCCRF — Tue, 26 Mar 2019 05:12:24 GMT

I'm sorry, but I don't understand.

Please explain in detail.

The main.c file can be modified through the Keil program.

The main.c file cannot be updated through nrfgostudio.

Should I replace the main.c file with the hex file?

Please explain.

RE: n51822 DTM Settings?

Jørgen Holmefjord — Thu, 21 Mar 2019 14:24:00 GMT

You need to recompile the firmware with the correct pins. For nRF51, we recommend using SDK v12.3.0, as this is the latest one with support for nRF51 series ICs.

RE: n51822 DTM Settings?

SCCRF — Thu, 21 Mar 2019 10:57:50 GMT

How do I do the HEX edition?
What kind of program do you use?

RE: n51822 DTM Settings?

Eugene Yu — Thu, 21 Mar 2019 01:07:59 GMT

Hi,

The prebuilt firmware is assigned UART T/Rx pin as below.

#define RX_PIN_NUMBER  11
#define TX_PIN_NUMBER  9

But your hardware doesn't use same pin as default.

Try to change the firmware code as below.

static void uart_init(void)
{
    // Configure UART0 pins.
    nrf_gpio_cfg_output(TX_PIN_NUMBER);
    nrf_gpio_cfg_input(RX_PIN_NUMBER, NRF_GPIO_PIN_NOPULL);

    NRF_UART0->PSELTXD       = 10;//TX_PIN_NUMBER;
    NRF_UART0->PSELRXD       = 11;//RX_PIN_NUMBER;
    NRF_UART0->BAUDRATE      = DTM_BITRATE;

    // Clean out possible events from earlier operations
    NRF_UART0->EVENTS_RXDRDY = 0;
    NRF_UART0->EVENTS_TXDRDY = 0;
    NRF_UART0->EVENTS_ERROR  = 0;

    // Activate UART.
    NRF_UART0->ENABLE        = UART_ENABLE_ENABLE_Enabled;
    NRF_UART0->INTENSET      = 0;
    NRF_UART0->TASKS_STARTTX = 1;
    NRF_UART0->TASKS_STARTRX = 1;
}

Thanks,

Eugene