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
/****************************************************************************
** Copyright (C) 2020 MikroElektronika d.o.o.
** Contact: https://www.mikroe.com/contact
**
** Permission is hereby granted, free of charge, to any person obtaining a copy
** of this software and associated documentation files (the "Software"), to deal
** in the Software without restriction, including without limitation the rights
** to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
** copies of the Software, and to permit persons to whom the Software is
** furnished to do so, subject to the following conditions:
** The above copyright notice and this permission notice shall be
** included in all copies or substantial portions of the Software.
**
** THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
** OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
** DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT
** OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
** USE OR OTHER DEALINGS IN THE SOFTWARE.
****************************************************************************/
/*!
* @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
Thanks for the reply. I checked but page is not responsive
Hello, please check again.
Kind regards,
Øyvind