Hi All, I'm working with MAX86916 sensor and trying to measure the FIFO/RED/IR/GREEN/BLUE data to measure SPO2, Heart Rate, Heart Beat but I'm not able to read any data on serial monitor. I followed MAx30101 and many other libraries to develop the library for this sensor but still failed to get any data. this is the data sheet.
Here is the H
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/*!
* @file heartrate10.h
* @brief This file contains API for Heart Rate 10 Click Driver.
*/
#ifndef MAX86916_H
#define MAX86916_H
#include "nrf_delay.h"
//I2C Pins Settings, you change them to any other pins
#define TWI_SCL_M 8 //I2C SCL Pin
#define TWI_SDA_M 7 //I2C SDA Pin
#define MAX86916_ADDRESS_LEN 1 //MPU6050
#define MAX86916_ADDRESS (0xAE>>1) //MPU6050 Device Address
#define MAX86916_WHO_AM_I 0x57U //MPU6050 ID
#define MAX86916_OUT 0x2B
#define ADDRESS_WHO_AM_I (0x64U) // WHO_AM_I register identifies the device. Expected value is 0x68.
#define ADDRESS_SIGNAL_PATH_RESET (0x57U) //
/**
* Any initialization code needed for MCU to function properly.
* Do not remove this line or clock might not be set correctly.
*/
//#include "drv_digital_out.h"
//#include "drv_digital_in.h"
//#include "drv_i2c_master.h"
/*!
* @addtogroup heartrate10 Heart Rate 10 Click Driver
* @brief API for configuring and manipulating Heart Rate 10 Click driver.
* @{
*/
/**
* @defgroup heartrate10_reg Heart Rate 10 Registers List
* @brief List of registers of Heart Rate 10 Click driver.
*/
/**
* @addtogroup heartrate10_reg
* @{
*/
/**
* @brief Heart Rate 10 communication register.
* @details Specified registers for communication with Heart Rate 10 Click.
*/
#define MAX86916_REG_INT_STATUS 0x00
#define MAX86916_REG_INT_ENABLE 0x02
#define MAX86916_REG_FIFO_WR_PTR 0x04
#define MAX86916_REG_FIFO_OVF_CNT 0x05
#define MAX86916_REG_FIFO_RD_PTR 0x06
#define MAX86916_REG_FIFO_DATA 0x07
#define MAX86916_REG_FIFO_CFG 0x08
#define MAX86916_REG_MODE_CFG1 0x09
#define MAX86916_REG_MODE_CFG2 0x0A
#define MAX86916_REG_LED1_PA 0x0C
#define MAX86916_REG_LED2_PA 0x0D
#define MAX86916_REG_LED3_PA 0x0E
#define MAX86916_REG_LED4_PA 0x0F
#define MAX86916_REG_LED_RANGE 0x11
#define MAX86916_REG_PILOT_PA 0x12
#define MAX86916_REG_LED_SEQ1 0x13
#define MAX86916_REG_LED_SEQ2 0x14
#define MAX86916_REG_DAC1_CROSSTALK_CODE 0x26
#define MAX86916_REG_DAC2_CROSSTALK_CODE 0x27
#define MAX86916_REG_DAC3_CROSSTALK_CODE 0x28
#define MAX86916_REG_DAC4_CROSSTALK_CODE 0x29
#define MAX86916_REG_PROX_INT_THRESHOLD 0x30
#define MAX86916_REG_LED_COMPARATOR_EN 0x31
#define MAX86916_REG_LED_COMPARATOR_STATUS 0x32
#define MAX86916_REG_REV_ID 0xFE
#define MAX86916_REG_PART_ID 0xFF
void twi_master_init(void); // initialize the twi communication
uint32_t max86916_init(void); // initialize the mpu6050
/*! @} */ // heartrate10_reg
/**
* @defgroup heartrate10_set Heart Rate 10 Registers Settings
* @brief Settings for registers of Heart Rate 10 Click driver.
*/
/**
* @addtogroup heartrate10_set
* @{
*/
/**
* @brief Heart Rate 10 description setting.
* @details Specified setting for description of Heart Rate 10 Click driver.
*/
//#define MAX86916_OUT 0x2B
/**
* @brief Heart Rate 10 device address setting.
* @details Specified setting for device slave address selection of
* Heart Rate 10 Click driver.
*/
//#define MAX86916_SET_DEV_ADDR 0x57
/*! @} */ // heartrate10_set
/**
* @defgroup heartrate10_map Heart Rate 10 MikroBUS Map
* @brief MikroBUS pin mapping of Heart Rate 10 Click driver.
*/
/**
* @addtogroup heartrate10_map
* @{
*/
/**
* @brief MikroBUS pin mapping.
* @details Mapping pins of Heart Rate 10 Click to the selected MikroBUS.
*/
/*#define HEARTRATE10_MAP_MIKROBUS( cfg, mikrobus ) \
cfg.scl = MIKROBUS( mikrobus, TWI_SCL_M ); \
cfg.sda = MIKROBUS( mikrobus, TWI_SCL_M ); \
cfg.int_pin = MIKROBUS( mikrobus, MIKROBUS_INT )
/*! @} */ // heartrate10_map
/*! @} */ // heartrate10
/**
* @brief Heart Rate 10 Click context object.
* @details Context object definition of Heart Rate 10 Click driver.
*/
/*typedef struct
{
// Input pins
digital_in_t int_pin; /**< Interrupt pin. */
// Modules
/* i2c_master_t i2c; /**< I2C driver object. */
// I2C slave address
/* uint8_t slave_address; /**< Device slave address (used for I2C driver). */
/*} heartrate10_t;
/**
* @brief Heart Rate 10 Click configuration object.
* @details Configuration object definition of Heart Rate 10 Click driver.
*/
/*typedef struct
{
pin_name_t TWI_SCL_M; /**< Clock pin descriptor for I2C driver. */
/* pin_name_t TWI_SCL_M; /**< Bidirectional data pin descriptor for I2C driver. */
/* pin_name_t int_pin; /**< Interrupt pin. */
/* uint32_t i2c_speed; /**< I2C serial speed. */
/* uint8_t i2c_address; /**< I2C slave address. */
/*} heartrate10_cfg_t;
/**
* @brief Heart Rate 10 Click return value data.
* @details Predefined enum values for driver return values.
*/
/*!
* @addtogroup heartrate10 Heart Rate 10 Click Driver
* @brief API for configuring and manipulating Heart Rate 10 Click driver.
* @{
*/
/**
* @brief Heart Rate 10 configuration object setup function.
* @details This function initializes click configuration structure to initial
* values.
* @param[out] cfg : Click configuration structure.
* See #heartrate10_cfg_t object definition for detailed explanation.
* @return Nothing.
* @note The all used pins will be set to unconnected state.
*/
//void MAX86916_cfg_setup ( heartrate10_cfg_t *cfg );
/**
* @brief Heart Rate 10 initialization function.
* @details This function initializes all necessary pins and peripherals used
* for this click board.
* @param[out] ctx : Click context object.
* See #heartrate10_t object definition for detailed explanation.
* @param[in] cfg : Click configuration structure.
* See #heartrate10_cfg_t object definition for detailed explanation.
* @return @li @c 0 - Success,
* @li @c -1 - Error.
*
* See #err_t definition for detailed explanation.
*/
//uint32_t MAX86916_init ( heartrate10_t *ctx, heartrate10_cfg_t *cfg );
/**
* @brief Heart Rate 10 default configuration function.
* @details This function executes a default configuration of Heart Rate 10
* click board.
* @param[in] ctx : Click context object.
* See #heartrate10_t object definition for detailed explanation.
* @return @li @c 0 - Success,
* @li @c -1 - Error.
*
* See #err_t definition for detailed explanation.
* @note This function can consist any necessary configuration or setting to put
* device into operating mode.
*/
//uint32_t MAX86916_default_cfg ( heartrate10_t *ctx );
/**
* @brief Writing function.
* @details This function writes a data to the selected register.
* @param[in] ctx : Click context object.
* See #heartrate10_t object definition for detailed explanation.
* @param[in] reg : Start register address.
* @param[in] tx_data : Data to be written.
* @return @li @c 0 - Success,
* @li @c -1 - Error.
*
* See #err_t definition for detailed explanation.
*/
//uint32_t MAX86916_generic_write ( uint8_t reg, uint8_t tx_data );
uint32_t max86916_register_write(uint8_t register_address, const uint8_t value);
/**
* @brief Reading function.
* @details This function reads a data from the selected register.
* @param[in] ctx : Click context object.
* See #heartrate10_t object definition for detailed explanation.
* @param[in] reg : Register address.
* @param[out] rx_data : Output read data.
* @return @li @c 0 - Success,
* @li @c -1 - Error.
*
* See #err_t definition for detailed explanation.
*/
//uint32_t MAX86916_generic_read ( heartrate10_t *ctx, uint8_t reg, uint8_t *rx_data );
uint32_t max86916_register_read(uint8_t register_address, uint8_t *destination, uint8_t number_of_bytes);
/**
* @brief Get interrupt pin state.
* @details Read and return @b int_pin state.
* @param[in] ctx : Click context object.
* See #heartrate10_t object definition for detailed explanation.
* @return Pin state
*
* See #err_t definition for detailed explanation.
*/
//uint8_t MAX86916_get_int_pin ( );
/**
* @brief Reset device.
* @details Set bit for reseting device and waits untill bit is cleared.
* @param[in] ctx : Click context object.
* See #heartrate10_t object definition for detailed explanation.
* @return Nothing.
*/
//void MAX86916_reset ( heartrate10_t *ctx );
/**
* @brief Read fifo register data.
* @details This function reads a data from the @b HEARTRATE10_REG_FIFO_DATA.
* @param[in] ctx : Click context object.
* See #heartrate10_t object definition for detailed explanation.
* @param[out] rx_buf : Output read data.
* @param[in] rx_len : Length of data to read.
* @return @li @c 0 - Success,
* @li @c -1 - Error.
*
* See #err_t definition for detailed explanation.
*/
//uint32_t MAX86916_fifo_read ( heartrate10_t *ctx, uint8_t *rx_buf, uint8_t rx_len );
/**
* @brief Read single sample of FIFO data.
* @details This function reads a 3 bytes from FIFO data register
* and concatenates data into 19bit led data.
* @param[in] ctx : Click context object.
* See #heartrate10_t object definition for detailed explanation.
* @return Led data.
*
* @note This function will read sample of data for four led diod it assumes
* that there is at least one led enabled and set in sequence register.
*/
//uint32_t MAX86916_read_fifo_sample ( heartrate10_t *ctx );
/**
* @brief Read all led samples.
* @details This function reads a 12 bytes from FIFO data register
* and concatenates data into 4 x 19bit led data.
* @param[in] ctx : Click context object.
* See #heartrate10_t object definition for detailed explanation.
* @param[out] led1 : Led1 output read data.
* @param[out] led2 : Led2 output read data.
* @param[out] led3 : Led3 output read data.
* @param[out] led4 : Led4 output read data.
* @return @li @c 0 - Success,
* @li @c -1 - Error.
*
* See #err_t definition for detailed explanation.
* @note This function will read four samples of data for four led diodes
* it assumes that there are 4 leds enabled and set in sequence register.
*/
uint32_t max86916_verify_product_id(void);
uint32_t MAX86916_read_complete_fifo_data ( uint32_t *led1, uint32_t *led2, uint32_t *led3, uint32_t *led4 );
//bool MPU6050_ReadGyro(int16_t *pGYRO_X , int16_t *pGYRO_Y , int16_t *pGYRO_Z );
//bool MPU6050_ReadAcc( int16_t *pACC_X , int16_t *pACC_Y , int16_t *pACC_Z );
#endif // HEARTRATE10_H
/*! @} */ // heartrate10
// ------------------------------------------------------------------------ END
and C library
#include <stdbool.h>
#include <stdint.h>
#include <string.h>
#include "nrf_drv_twi.h"
#include "max86916.h"
//Initializing TWI0 instance
#define TWI_INSTANCE_ID 0
// A flag to indicate the transfer state
static volatile bool m_xfer_done = false;
// Create a Handle for the twi communication
static const nrf_drv_twi_t m_twi = NRF_DRV_TWI_INSTANCE(TWI_INSTANCE_ID);
//Event Handler
void twi_handler(nrf_drv_twi_evt_t const * p_event, void * p_context)
{
//Check the event to see what type of event occurred
switch (p_event->type)
{
//If data transmission or receiving is finished
case NRF_DRV_TWI_EVT_DONE:
m_xfer_done = true;//Set the flag
break;
default:
// do nothing
break;
}
}
//Initialize the TWI as Master device
void twi_master_init(void)
{
ret_code_t err_code;
// Configure the settings for twi communication
const nrf_drv_twi_config_t twi_config = {
.scl = TWI_SCL_M, //SCL Pin
.sda = TWI_SDA_M, //SDA Pin
.frequency = NRF_DRV_TWI_FREQ_100K, //Communication Speed
.interrupt_priority = APP_IRQ_PRIORITY_HIGH, //Interrupt Priority(Note: if using Bluetooth then select priority carefully)
.clear_bus_init = false //automatically clear bus
};
//A function to initialize the twi communication
err_code = nrf_drv_twi_init(&m_twi, &twi_config, twi_handler, NULL);
APP_ERROR_CHECK(err_code);
//Enable the TWI Communication
nrf_drv_twi_enable(&m_twi);
}
/*
A function to write a Single Byte to MPU6050's internal Register
*/
uint32_t max86916_register_write(uint8_t register_address, uint8_t value)
{
ret_code_t err_code;
uint8_t tx_buf[MAX86916_ADDRESS_LEN+1];
//Write the register address and data into transmit buffer
tx_buf[0] = register_address;
tx_buf[1] = value;
//Set the flag to false to show the transmission is not yet completed
m_xfer_done = false;
//Transmit the data over TWI Bus
err_code = nrf_drv_twi_tx(&m_twi, MAX86916_ADDRESS, tx_buf, MAX86916_ADDRESS_LEN+1, false);
//Wait until the transmission of the data is finished
while (m_xfer_done == false)
{
}
// if there is no error then return true else return false
if (NRF_SUCCESS != err_code)
{
return false;
}
return true;
}
/*
A Function to read data from the MPU6050
*/
uint32_t max86916_register_read(uint8_t register_address, uint8_t * destination, uint8_t number_of_bytes)
{
ret_code_t err_code;
//Set the flag to false to show the receiving is not yet completed
m_xfer_done = false;
// Send the Register address where we want to write the data
err_code = nrf_drv_twi_tx(&m_twi, MAX86916_ADDRESS, ®ister_address, 1, true);
//Wait for the transmission to get completed
while (m_xfer_done == false){}
// If transmission was not successful, exit the function with false as return value
if (NRF_SUCCESS != err_code)
{
return false;
}
//set the flag again so that we can read data from the MPU6050's internal register
m_xfer_done = false;
// Receive the data from the MPU6050
err_code = nrf_drv_twi_rx(&m_twi, MAX86916_ADDRESS, destination, number_of_bytes);
//wait until the transmission is completed
while (m_xfer_done == false){}
// if data was successfully read, return true else return false
if (NRF_SUCCESS != err_code)
{
return false;
}
return true;
}
/*
A Function to verify the product id
(its a basic test to check if we are communicating with the right slave, every type of I2C Device has
a special WHO_AM_I register which holds a specific value, we can read it from the MPU6050 or any device
to confirm we are communicating with the right device)
*/
uint32_t max86916_verify_product_id(void)
{
uint8_t who_am_i; // create a variable to hold the who am i value
// Note: All the register addresses including WHO_AM_I are declared in
// MPU6050.h file, you can check these addresses and values from the
// datasheet of your slave device.
if (max86916_register_read(ADDRESS_WHO_AM_I, &who_am_i, 1))
{
if (who_am_i != MAX86916_WHO_AM_I)
{
return false;
}
else
{
return true;
}
}
else
{
return false;
}
}
/*
Function to initialize the mpu6050
*/
uint32_t max86916_init(void)
{
uint32_t transfer_succeeded = true;
//Check the id to confirm that we are communicating with the right device
transfer_succeeded &= max86916_verify_product_id();
if(max86916_verify_product_id() == false)
{
return false;
}
// Set the registers with the required values, see the datasheet to get a good idea of these values
(void)max86916_register_write(MAX86916_REG_MODE_CFG1, 0x03);
(void)max86916_register_write(MAX86916_REG_MODE_CFG2, 0x64);
(void)max86916_register_write(MAX86916_REG_LED_SEQ1, 0x21);
(void)max86916_register_write(MAX86916_REG_LED_SEQ2, 0x43);
(void)max86916_register_write(MAX86916_REG_LED_RANGE, 0x00);
(void)max86916_register_write(MAX86916_REG_LED1_PA, 0xFF);
(void)max86916_register_write(MAX86916_REG_LED1_PA, 0xFF);
(void)max86916_register_write(MAX86916_REG_LED1_PA, 0xFF);
(void)max86916_register_write(MAX86916_REG_LED1_PA, 0xFF);
(void)max86916_register_write(MAX86916_REG_FIFO_CFG, 0x10);
(void)max86916_register_write(MAX86916_REG_INT_ENABLE, 0x40);
return transfer_succeeded;
}
/*
Read the Gyro values from the MPU6050's internal Registers
*/
//bool MAX86916_read_complete_fifo_data(int16_t *pGYRO_X , int16_t *pGYRO_Y , int16_t *pGYRO_Z )
uint32_t MAX86916_read_complete_fifo_data ( uint32_t *led1, uint32_t *led2, uint32_t *led3, uint32_t *led4 )
{
uint8_t sample_parts[ 12 ] = { 0 };
uint32_t ret = false;
//bool error_flag = max86916_read_complete_fifo_data( sample_parts, 12 );
// bool error_flag = heartrate10_fifo_read( ctx, sample_parts, 12 );
if(max86916_register_read(MAX86916_OUT, sample_parts, 12) == true)
{
max86916_register_read(MAX86916_OUT, sample_parts, 12);
*led1 = sample_parts[ 2 ] | ( ( uint32_t )sample_parts[ 1 ] << 8 ) | ( ( uint32_t )sample_parts[ 0 ] << 16 );
*led1 &= 0x0007FFFF;
*led2 = sample_parts[ 5 ] | ( ( uint32_t )sample_parts[ 4 ] << 8 ) | ( ( uint32_t )sample_parts[ 3 ] << 16 );
*led2 &= 0x0007FFFF;
*led3 = sample_parts[ 8 ] | ( ( uint32_t )sample_parts[ 7 ] << 8 ) | ( ( uint32_t )sample_parts[ 6 ] << 16 );
*led3 &= 0x0007FFFF;
*led4 = sample_parts[ 11 ] | ( ( uint32_t )sample_parts[ 10 ] << 8 ) | ( ( uint32_t )sample_parts[ 9 ] << 16 );
*led4 &= 0x0007FFFF;
ret = true;
}
return ret;
}
and Main Code
#include <stdio.h>
#include "boards.h"
#include "app_util_platform.h"
#include "nrf_drv_twi.h"
#include "nrf_log.h"
#include "nrf_log_ctrl.h"
#include "nrf_log_default_backends.h"
#include "max86916.h"
#include "nrf_log.h"
#include "app_error.h"
// main code
int main(void)
{
// initialize the logger
APP_ERROR_CHECK(NRF_LOG_INIT(NULL));
NRF_LOG_DEFAULT_BACKENDS_INIT();
// create arrays which will hold x,y & z co-ordinates values of acc and gyro
static int32_t read_complete_fifo_data[4];
bsp_board_init(BSP_INIT_LEDS | BSP_INIT_BUTTONS); // initialize the leds and buttons
twi_master_init(); // initialize the twi
nrf_delay_ms(1000); // give some delay
while(max86916_init() == false) // wait until MPU6050 sensor is successfully initialized
{
NRF_LOG_INFO("MAX86916 initialization failed!!!"); // if it failed to initialize then print a message
nrf_delay_ms(1000);
}
NRF_LOG_INFO("MAX86916 Init Successfully!!!");
NRF_LOG_INFO("Reading Values FIFO"); // display a message to let the user know that the device is starting to read the values
nrf_delay_ms(2000);
while (true)
{
if(MAX86916_read_complete_fifo_data(&read_complete_fifo_data[0], &read_complete_fifo_data[1], &read_complete_fifo_data[2], &read_complete_fifo_data[3]) == true) // Read acc value from mpu6050 internal registers and save them in the array
{
NRF_LOG_INFO("Values FIFO: led1 = %d led2 = %d led3 = %d led4 = %d", read_complete_fifo_data[0], read_complete_fifo_data[1], read_complete_fifo_data[2], &read_complete_fifo_data[3]); // display the read values
}
else
{
NRF_LOG_INFO("Reading FIFO values Failed!!!"); // if reading was unsuccessful then let the user know about it
}
nrf_delay_ms(100); // give some delay
}
}
/** @} */
Hello,
I'm afraid there is not much we can do in regards to drivers from 3. party vendors.
What SDK are you using? If using the nRF Connect SDK, please have a look at the Zephyr sample for MAX 30101
Kind regards,
Øyvind
Hello,
I'm afraid there is not much we can do in regards to drivers from 3. party vendors.
What SDK are you using? If using the nRF Connect SDK, please have a look at the Zephyr sample for MAX 30101
Kind regards,
Øyvind
Thanks for the reply. I checked but page is not responsive
Hello, please check again.
Kind regards,
Øyvind