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
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
Hello Vishnu,
Thank you very much for your reply. From what i can see the code is pretty much the same so it may be a hardware issue. Again thank you very much for the help.