I am begineer coder. I am working on nRF52832 board. Want to develope firmware for Temperature and Humidity using HTU21D sensor. Could anyone provide me complete code with supporting files to refer. thanks.

[kiran90]

I am working on nRF52832 controller for a small project . I am completely new to this series of controller.

I want to develope a firmware to measure Humidity and Temperature using HTU21D sensor. I am using Eclipse neon IDE. I am completely unaware of procedure to develope a code using Eclipse IDE. 

Could anyone please send me a complete code to measure Humidity and Temperature using HTU21D. Please I want code and supporting files for the same. e.g. linker file, makefile, configuration file etc.

Thanks in advance! 

[karthikeyan]

hi,

  here i attach the code for htu21d but it works in pca10028. you want to make necessary changes to work on nrf52832 pca 10040. 2526.HTU21D.rar

cheers,

karthikeyan

[kiran90]

Hi Karthikeyan, 

I do have another query. I have done my coding for another project. Please help me to rectify the code. 

I am sumitting the code here. 

Fullscreen 5516.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;
}

I want to transmit 0-9 numbers using UART. Above the code for same. I dont know where I am going wrong. Please help me with code.

[karthikeyan]

hi,

  can you post the new question. because anybody can answer that. and also please describe the exact problem

[kiran90]

Yes Karthikeyan, I will do the same.

Thank you for suggestion. Appericiate!