Transmit and Receive data via UART

[Sadasivam]

I have compiled and debugged the temperature_pca10036 code from nRF5_SDK_v11.0. I have used termite terminal for getting info about transferring of data from nRF52832 board to PC. And i haven't got the output for the code. Is this, the way correct. Please help with simple code for analysing the data transfer in UART.

[Sadasivam]

Thankyou sir for your kind approach. I have made the code correctly as per your guide and its working in good.

[kiran90]

Hi Sadasivam,

I am facing same problem. I am using nRF52832 pca10040. IDE using is eclipse.

I want to transmit 0-9 numbers using UART. The transmitted data equals to received data the LED should blink otherwise it should be off state.

I am begineer, that is why facing small problem. Please help me with the code.

Thank you in advance.

Here is the code that I developed take a look suggest changes.

Fullscreen 40847.main.c Download

#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include "app_uart.h"
#include "app_error.h"
#include "nrf_delay.h"
#include "nrf.h"
#include "bsp.h"



#define MAX_TEST_DATA_BYTES     (15U)
#define UART_TX_BUF_SIZE 256
#define UART_RX_BUF_SIZE 256



//  UART error handler function.


void uart_error_handle(app_uart_evt_t * p_event)
{
    if (p_event->evt_type == APP_UART_COMMUNICATION_ERROR)
    {
        APP_ERROR_HANDLER(p_event->data.error_communication);
    }
    else if (p_event->evt_type == APP_UART_FIFO_ERROR)
    {
        APP_ERROR_HANDLER(p_event->data.error_code);
    }
}




// LED glow function: When data Transmitted is equal to data Received then LED glow up else stays off.


void led_blink()
{

    bsp_board_leds_init();


    while (true)
    {
        for (int i = 0; i < 1; i++)
        {
            bsp_board_led_invert(i);
            nrf_delay_ms(500);
        }
    }
}

//   UART transmit function.


 #if ((Enable_UART_TxDecimalNumber==1) || (Enable_UART_TxFloatNumber==1))


void UART_Tx(uint32_t dec_no, uint8_t nod)
{
		uint8_t i=0;

		printf("\nEnter decimal no to transmit:");
		scanf("\n%d", &dec_no);

		if(dec_no==0)																			//decimal number to transmit
		{
			for(i=0; ((i<nod) && (i<max_dttx)); i++)											//number of digits to transmit
			a[i] = 0x00;																		//maximum number of digits to transmit
		}
		else if
		{
			for(i=0; i<nod; i++)
			{
				if(dec_no!=0)
				{
					a[i] = util_GetMod32(dec_no,10);
					dec_no = dec_no/10;
				}


		else if( (nod == dttx) || (nod > max_dttx))												//total numbers to transmit
			{
				break;
			}
		else
			{
				a[i]=0;
			}
		}
	}

	while(i)
	{
		UART_TxChar(util_Dec2Ascii(a[i-1]));													//Convert decimal to ASCII
		i--;
	}

	void led_blink();
}

#endif



//  main Function.


int main(void)
{
    uint32_t err_code;

    bsp_board_leds_init();

    const app_uart_comm_params_t comm_params =
      {
          RX_PIN_NUMBER,
          TX_PIN_NUMBER,
          RTS_PIN_NUMBER,
          CTS_PIN_NUMBER,
          APP_UART_FLOW_CONTROL_ENABLED,
          false,
          UART_BAUDRATE_BAUDRATE_Baud19200
      };

    APP_UART_FIFO_INIT(&comm_params,
                         UART_RX_BUF_SIZE,
                         UART_TX_BUF_SIZE,
                         uart_error_handle,
                         APP_IRQ_PRIORITY_LOWEST,
                         err_code);

    APP_ERROR_CHECK(err_code);


    UART_Tx();



	return 0;
}

[Jørgen Holmefjord]

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