n51822 DTM Settings?

[SCCRF]

Hi

I want to get a certification.
I need your help because I am not currently in DTM mode.

The procedure I checked is as follows.

1. J-LINK , USB to Serial Converter

2. Firmware update

- Update List

 nRF5_SDK_15.3.0_59ac345

nRF51_SDK_10.0.0_dc26b5e

nRF5_SDK_15.0.0_a53641a

3. DTM Error

What did I do wrong?

Please help me.

[Eugene Yu]

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

[Jørgen Holmefjord]

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.

[SCCRF]

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.

[Jørgen Holmefjord]

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.