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Problems with UART running ble_app_uart_c on nRF52832

Hello, I am trying to run the ble_app_uart_c example that is part of the nRF5_SDK_13.1.0_7ca7556 on a custom board with nRF52832 using IAR. Hardware seems healthy, I succeeded to run LEDs and make them blink... I am having troubles with running the UART, however:

Initialization of UART is as follows:

const app_uart_comm_params_t comm_params =
  {
    .rx_pin_no    = RX_PIN_NUMBER,
    .tx_pin_no    = TX_PIN_NUMBER,
    .rts_pin_no   = RTS_PIN_NUMBER,
    .cts_pin_no   = CTS_PIN_NUMBER,
    .flow_control = APP_UART_FLOW_CONTROL_DISABLED,
    .use_parity   = false,
    .baud_rate    = UART_BAUDRATE_BAUDRATE_Baud115200
  }; 

and also:

#define RX_PIN_NUMBER  NULL
#define TX_PIN_NUMBER  7 
#define CTS_PIN_NUMBER NULL
#define RTS_PIN_NUMBER NULL
#define HWFC           false

After running uart_init(); passes with success (I have played with LEDs to get the result), however the debug lines

printf("BLE UART central example started.\r\n");
NRF_LOG_INFO("BLE UART central example started.\r\n");

do not produce any output on the TX pin.

Also, in the main loop I have the following:

for (;;)
{
    //power_manage();
  
  bsp_board_led_off(0);       
  bsp_board_led_on(1);
  nrf_delay_ms(3000);
  bsp_board_led_off(1);
  bsp_board_led_on(0);
  nrf_delay_ms(3000);  

}

When the uart_init() is commented/disabled I can get the two LEDs blinking, if uart_init() is not commented and gets executed only one LEDs is always lit, which means the nrf_delay_ms is not executed properly.

Since I am dealing with ble_app_uart_c for first time, I am not quite sure where to search for the problem, any advice would be helpful.

Parents
  • Finally, there were two problems: 1) I had to define CONFIG_NFCT_PINS_AS_GPIOS since my Tx pin is P0.10/NFC2 2) It seems that adjusting the UART pin definitions in sdk_config.h and pca10040.h was not fine. These two fixed the problems and I am now able to use my dongle successfully. I would like to thank all who provided help - without it it would had been very difficult to resolve the problem.

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  • Finally, there were two problems: 1) I had to define CONFIG_NFCT_PINS_AS_GPIOS since my Tx pin is P0.10/NFC2 2) It seems that adjusting the UART pin definitions in sdk_config.h and pca10040.h was not fine. These two fixed the problems and I am now able to use my dongle successfully. I would like to thank all who provided help - without it it would had been very difficult to resolve the problem.

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