Hello,
I am using nRF52832, SDK_15.3.0, S132 SoftDevice and Segger for flashing the image.
Is there any sample code integrated with HDC2010 Temperature & Humidity sensor over TWI for reference.
I want to integrate into ble_app_blinky.
Thanks & Regards
Vishnu Beema
Hi,
Unfortunately we don't have any sample code for this in our SDK
Regards
Jared
Fine Jared, I am able to bring up and its working fine with HDC2010
Fine Jared, I am able to bring up and its working fine with HDC2010
Hello Vishnu,
I am trying to get my HDC2010 working with the nordic chip but i keep getting a NACK every time i try to talk to it. It returns a NACK before i send any of the register addresses or the data which makes me think that its something to do with the HDC address. From my understanding the address of the sensor is 0x40 but i may be mistaken. Also do you also include the write/read bit in the address or do you send the address as a 7-bit number?
Thanks.
The easiest way to answer this is to use the TWI Scanner example - it will tell you the address as used by the Nordic routines.
Thank you very much for the reply, although it doesn't seem to be working correctly. Its not finding any devices on the TWI although I have both the HDC2010 and an LIS2 on that and the accelerometer has been tested and works fine. I've enabled the TWIM0 instance in the sdk_config of the project because those were not enabled but i still cant seem to get any of the sensors showing up.
I apologise for that. I completely forgot to set the SCL and SDA pins to the ones i am using. After setting that the accelerometer is discovered on the correct address but still no HDC2010.
Hello,
By using TWI scanner example I am able to find the address of HDC2010 as 0x40. Attached are the files I implemented and its working fine. I took reference from TI code and there are some other sample exampled code. I modified to Noridc and working fine.
/**
* @brief All HDC2010 Temperature & Humidity Sensor related operations are taken care here
*
* Author : Vishnu Beema
*/
#include "sdk_config.h"
#include <stdint.h>
#include <string.h>
#include "nordic_common.h"
#include "nrf.h"
#include "app_error.h"
#include "ble.h"
#include "ble_err.h"
#include "ble_hci.h"
#include "ble_srv_common.h"
#include "ble_advdata.h"
#include "ble_conn_params.h"
#include "nrf_sdh.h"
#include "nrf_sdh_ble.h"
#include "boards.h"
#include "app_timer.h"
#include "app_button.h"
#include "ble_dtlgs.h"
#include "nrf_ble_gatt.h"
#include "nrf_ble_qwr.h"
#include "nrf_pwr_mgmt.h"
#include "nrf_drv_timer.h"
#include "nrf_drv_rtc.h"
#include "nrf_drv_gpiote.h"
#include "nrf_drv_twi.h"
#include "nrf_log.h"
#include "nrf_log_ctrl.h"
#include "nrf_log_default_backends.h"
#include "hdc2010_operations.h"
#define CONFIGURATION_FIELD_DESCRIPTIONS_REGISTER_ADDRESS (0x0E)
#define AUTO_MEASUREMENT_DIABLE (0x00)
#define MEASUREMENT_CONFIGURATION_REGISTER_ADDRESS (0x0F)
#if 1
// 14-bit resolution
#define MEASUREMENT_DEFAULT_CONFIGURATION (0x00)
#define MEASUREMENT_TRIGGER (0x01)
#else
// 8-bit resolution
#define MEASUREMENT_DEFAULT_CONFIGURATION (0xA0)
#define MEASUREMENT_TRIGGER (0xA1)
#endif
#define TEMPERATUR_LSB_WRITE_POINTER_ADDRESS (0x00)
/* Common addresses definition for temperature sensor. */
#define HDC2010_ADDR (0x40U)
/* TWI instance. */
const nrf_drv_twi_t m_twi = NRF_DRV_TWI_INSTANCE(TWI_INSTANCE_ID);
uint8_t u8SlaveAddress = 0;
/* Indicates if operation on TWI has ended. */
volatile bool m_xfer_done = false;
/* Buffer for samples read from temperature sensor. */
static uint8_t u8ReadTempHumid[4] = {0};
/**
* @brief Function for handling data from temperature sensor.
*
* @param[in] temp Temperature in Celsius degrees read from sensor.
*/
void hdc2010_data_handler(void)
{
uint32_t u32TempData = 0;
uint32_t u32HumidData = 0;
uint8_t u8Humidity = 0;
int16_t i16Temperature = 0;
memcpy(&u32TempData, &u8ReadTempHumid[0], 2);
memcpy(&u32HumidData, &u8ReadTempHumid[2], 2);
i16Temperature = (int16_t) ( (u32TempData * 1650 / 65536) - 400); // Multiplied by 10
u8Humidity = (uint8_t) (u32HumidData * 100 / 65536);
//NRF_LOG_INFO("Temp: %d %d Hum %d", u32TempData, strFlashDataRecord.i16Temperature, strFlashDataRecord.u8Humidity);
NRF_LOG_INFO("Temp: %d Hum %d", i16Temperature, u8Humidity);
}
/**
* @brief TWI events handler.
*/
static void twi_handler(nrf_drv_twi_evt_t const * p_event, void * p_context)
{
switch(p_event->type)
{
case NRF_DRV_TWI_EVT_DONE:
{
if(p_event->xfer_desc.type == NRF_DRV_TWI_XFER_RX)
{
if(u8SlaveAddress == HDC2010_ADDR)
{
hdc2010_data_handler();
}
}
m_xfer_done = true;
// Reset the Slave address
u8SlaveAddress = 0;
}
break;
default:
NRF_LOG_INFO("twi_default %d", p_event->type);
// NRF_DRV_TWI_EVT_ADDRESS_NACK when wrong address is sent
break;
}
}
/**
* @brief TWI initialization.
*/
static void twi_init (void)
{
ret_code_t err_code;
const nrf_drv_twi_config_t twi_hdc2010_config = {
.scl = HDC2010_SENSOR_TWI_SCL_PIN,
.sda = HDC2010_SENSOR_TWI_SDA_PIN,
.frequency = NRF_DRV_TWI_FREQ_100K, // Configured to 100k
.interrupt_priority = APP_IRQ_PRIORITY_HIGH,
.clear_bus_init = false
};
err_code = nrf_drv_twi_init(&m_twi, &twi_hdc2010_config, twi_handler, NULL); // Non-Blocking mode
//err_code = nrf_drv_twi_init(&m_twi, &twi_hdc2010_config, NULL, NULL); // Blocking mode
APP_ERROR_CHECK(err_code);
}
/**
* @brief Function for reading data from temperature sensor.
*/
void hdc2010_StartMeasurement_sensor_data(void)
{
ret_code_t err_code;
// Trigger 'Measurement_Trigger'
uint8_t reg[2] = {MEASUREMENT_CONFIGURATION_REGISTER_ADDRESS, MEASUREMENT_TRIGGER};
// Enable TWI
nrf_drv_twi_enable(&m_twi);
m_xfer_done = false;
u8SlaveAddress = HDC2010_ADDR;
err_code = nrf_drv_twi_tx(&m_twi, HDC2010_ADDR, ®[0], sizeof(reg), false);
APP_ERROR_CHECK(err_code);
while(m_xfer_done == false);
#if 0 // Test code to read all Registers
// Change the 'Read pointer'
reg[0] = TEMPERATUR_LSB_WRITE_POINTER_ADDRESS;
m_xfer_done = false;
u8SlaveAddress = HDC2010_ADDR;
err_code = nrf_drv_twi_tx(&m_twi, HDC2010_ADDR, ®[0], 1, false);
APP_ERROR_CHECK(err_code);
while(m_xfer_done == false);
// Read all 20 bytes
m_xfer_done = false;
u8SlaveAddress = HDC2010_ADDR;
err_code = nrf_drv_twi_rx(&m_twi, HDC2010_ADDR, &u8ReadTempHumid[0], sizeof(u8ReadTempHumid)); // Make sure buffer size is 20
APP_ERROR_CHECK(err_code);
while(m_xfer_done == false);
// Change the 'Read pointer' to "Temperature LSB"
reg[0] = TEMPERATUR_LSB_WRITE_POINTER_ADDRESS;
m_xfer_done = false;
u8SlaveAddress = HDC2010_ADDR;
err_code = nrf_drv_twi_tx(&m_twi, HDC2010_ADDR, ®[0], 1, false);
APP_ERROR_CHECK(err_code);
while(m_xfer_done == false);
// Read 4 bytes of "Temperature + Humidity" data. 2 bytes for Temperature and 2 bytes for Humidity.
m_xfer_done = false;
u8SlaveAddress = HDC2010_ADDR;
memset(&u8ReadTempHumid[0], 0, sizeof(u8ReadTempHumid));
err_code = nrf_drv_twi_rx(&m_twi, HDC2010_ADDR, &u8ReadTempHumid[0], sizeof(u8ReadTempHumid));
APP_ERROR_CHECK(err_code);
while(m_xfer_done == false);
// Disable TWI
nrf_drv_twi_disable(&m_twi);
}
void hdc2010_Init(void)
{
twi_init();
/*
// Other than 'Measurement Trigger' all settings are by default configured.
1) Address 0x04 Interrupt DRDY => All interrupts are disabled by default.
2) Address 0x05 Temperature MAX => Not configured
3) Address 0x06 Humidity MAX => Not configured
4) Address 0x07 Interrupt Configuration => All interrupts are disabled by default.
5) Address 0x08 Temperature Offset Adjustment => No offset configuration
6) Address 0x09 Humidity Offset Adjustment => No offset configuration
7) Address 0x0A Temperature Threshold LOW => No Threshold configuration
8) Address 0x0B Temperature Threshold HIGH => No Threshold configuration
9) Address 0x0C Humidity Threshold LOW => No Threshold configuration
10) Address 0x0D Humidity Threshold HIGH => No Threshold configuration
11) Address 0x0E Reset and DRDY/INT Configuration Register => Auto measurement diabled by default. Initiate measurement via I2C
12) Address 0x0F Measurement Configuration => 14-bit Temperature resolution,
14-bit Humidity resolution,
Read 'Temperature + Humidity' at a time
*/
ret_code_t err_code;
uint8_t reg[2] = {0};
// Enable TWI
nrf_drv_twi_enable(&m_twi);
// Auto measurement diabled by default
reg[0] = CONFIGURATION_FIELD_DESCRIPTIONS_REGISTER_ADDRESS;
reg[1] = AUTO_MEASUREMENT_DIABLE;
m_xfer_done = false;
u8SlaveAddress = HDC2010_ADDR;
err_code = nrf_drv_twi_tx(&m_twi, HDC2010_ADDR, ®[0], sizeof(reg), false); //'false' sent STOP at end of transaction
APP_ERROR_CHECK(err_code);
while(m_xfer_done == false)
{
NRF_LOG_PROCESS();
}
/*
Address 0x0F Measurement Configuration => 14-bit Temperature resolution,
14-bit Humidity resolution,
Read 'Temperature + Humidity' at a time
*/
reg[0] = MEASUREMENT_CONFIGURATION_REGISTER_ADDRESS;
reg[1] = MEASUREMENT_DEFAULT_CONFIGURATION;
m_xfer_done = false;
u8SlaveAddress = HDC2010_ADDR;
err_code = nrf_drv_twi_tx(&m_twi, HDC2010_ADDR, ®[0], sizeof(reg), false);
APP_ERROR_CHECK(err_code);
while(m_xfer_done == false)
{
NRF_LOG_PROCESS();
}
// Disable TWI
nrf_drv_twi_disable(&m_twi);
}
/**
* @}
*/
Thanks & Regards
Vishnu Beema