UART on nRF52 DK

Question

Hi,

I am trying to send a HEX command to a device over UART at 9600bps using nRF52 DK, but it never works. However, it works with Arduino (so the receiving device should be ok). Can someone please help checking my code ? Also, can someone tell me how to configure UART to have: 8 bits, odd parity and 1 stop bits ?

Thanks a lot !

int main(void)
{
UART uart(18,17,9600);//Rx,Tx - Baud rate is hard-coded in the class.
nrf_delay_ms(1000);
uint8_t buffx[] = {0x02, 0x00, 0x00, 0x81, 0x00, 0x00};
	while(1){
uart.Write(buffx, sizeof(buffx));
	nrf_delay_ms(3000);
}
}

Here is my UART class implementation:

#include "UART.h"
extern "C"{
#include "app_uart.h"
#include "pca10040.h"
}

UART::UART(uint8_t rx_pin, uint8_t tx_pin, uint32_t baud_rate){
	UART_rx_pin = rx_pin;
	UART_tx_pin = tx_pin;
	Baud_Rate = baud_rate;
	uart_config();
}

uint32_t UART::flush(void)	{
	uint32_t status = app_uart_flush();
	return status;
};

uint32_t UART::close(void)	{
	uint32_t status = app_uart_close();
	return status;
};

void UART::Read(uint8_t * buf, uint8_t NumBytes){
	for(int i=0 ; i<NumBytes; i++){
	app_uart_get(buf+i);
	}
};

void UART::Write(uint8_t * buf, uint8_t NumBytes){
	for(int i=0 ; i<NumBytes; i++){
	app_uart_put(buf[i]);
	}
};

void UART::uart_events_handler(app_uart_evt_t * p_event)
{
    switch (p_event->evt_type)
    {
        case APP_UART_COMMUNICATION_ERROR:
            APP_ERROR_HANDLER(p_event->data.error_communication);
            break;

        case APP_UART_FIFO_ERROR:
            APP_ERROR_HANDLER(p_event->data.error_code);
            break;

        default:
            break;
    }
}

/**
 * @brief UART initialization.
 */
void UART::uart_config(void)
{
    uint32_t                     err_code;
    app_uart_comm_params_t comm_params =
    {
        UART_rx_pin,
        UART_tx_pin,
        RTS_PIN_NUMBER,
        CTS_PIN_NUMBER,
        APP_UART_FLOW_CONTROL_DISABLED,
        false,
        UART_BAUDRATE_BAUDRATE_Baud9600
    };

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

    APP_ERROR_CHECK(err_code);
}