Diff: MAX30102.cpp

Revision:

0:4be500de690c

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/MAX30102.cpp	Tue Mar 20 02:09:21 2018 +0000
@@ -0,0 +1,219 @@
+/** \file max30102.cpp ******************************************************
+*
+* Project: MAXREFDES117#
+* Filename: max30102.cpp
+* Description: This module is an embedded controller driver for the MAX30102
+*
+*
+* --------------------------------------------------------------------
+*
+* This code follows the following naming conventions:
+*
+* char              ch_pmod_value
+* char (array)      s_pmod_s_string[16]
+* float             f_pmod_value
+* int32_t           n_pmod_value
+* int32_t (array)   an_pmod_value[16]
+* int16_t           w_pmod_value
+* int16_t (array)   aw_pmod_value[16]
+* uint16_t          uw_pmod_value
+* uint16_t (array)  auw_pmod_value[16]
+* uint8_t           uch_pmod_value
+* uint8_t (array)   auch_pmod_buffer[16]
+* uint32_t          un_pmod_value
+* int32_t *         pn_pmod_value
+*
+* ------------------------------------------------------------------------- */
+/*******************************************************************************
+* Copyright (C) 2016 Maxim Integrated Products, Inc., All Rights Reserved.
+*
+* 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 MAXIM INTEGRATED 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.
+*
+* Except as contained in this notice, the name of Maxim Integrated
+* Products, Inc. shall not be used except as stated in the Maxim Integrated
+* Products, Inc. Branding Policy.
+*
+* The mere transfer of this software does not imply any licenses
+* of trade secrets, proprietary technology, copyrights, patents,
+* trademarks, maskwork rights, or any other form of intellectual
+* property whatsoever. Maxim Integrated Products, Inc. retains all
+* ownership rights.
+*******************************************************************************
+*/
+#include "mbed.h"
+#include "MAX30102.h"
+
+
+I2C i2c(PB_14, PB_13);//SDA-PB9,SCL-PB8
+
+
+bool maxim_max30102_write_reg(uint8_t uch_addr, uint8_t uch_data)
+/**
+* \brief        Write a value to a MAX30102 register
+* \par          Details
+*               This function writes a value to a MAX30102 register
+*
+* \param[in]    uch_addr    - register address
+* \param[in]    uch_data    - register data
+*
+* \retval       true on success
+*/
+{
+  char ach_i2c_data[2];
+  ach_i2c_data[0]=uch_addr;
+  ach_i2c_data[1]=uch_data;
+  
+  if(i2c.write(I2C_WRITE_ADDR, ach_i2c_data, 2, false)==0)
+    return true;
+  else
+    return false;
+}
+
+bool maxim_max30102_read_reg(uint8_t uch_addr, uint8_t *puch_data)
+/**
+* \brief        Read a MAX30102 register
+* \par          Details
+*               This function reads a MAX30102 register
+*
+* \param[in]    uch_addr    - register address
+* \param[out]   puch_data    - pointer that stores the register data
+*
+* \retval       true on success
+*/
+{
+  char ch_i2c_data;
+  ch_i2c_data=uch_addr;
+  if(i2c.write(I2C_WRITE_ADDR, &ch_i2c_data, 1, true)!=0)
+    return false;
+  if(i2c.read(I2C_READ_ADDR, &ch_i2c_data, 1, false)==0)
+  {
+    *puch_data=(uint8_t) ch_i2c_data;
+    return true;
+  }
+  else
+    return false;
+}
+
+bool maxim_max30102_init()
+/**
+* \brief        Initialize the MAX30102
+* \par          Details
+*               This function initializes the MAX30102
+*
+* \param        None
+*
+* \retval       true on success
+*/
+{
+  if(!maxim_max30102_write_reg(REG_INTR_ENABLE_1,0xc0)) // INTR setting
+    return false;
+  if(!maxim_max30102_write_reg(REG_INTR_ENABLE_2,0x00))
+    return false;
+  if(!maxim_max30102_write_reg(REG_FIFO_WR_PTR,0x00))  //FIFO_WR_PTR[4:0]
+    return false;
+  if(!maxim_max30102_write_reg(REG_OVF_COUNTER,0x00))  //OVF_COUNTER[4:0]
+    return false;
+  if(!maxim_max30102_write_reg(REG_FIFO_RD_PTR,0x00))  //FIFO_RD_PTR[4:0]
+    return false;
+  if(!maxim_max30102_write_reg(REG_FIFO_CONFIG,0x0f))  //sample avg = 1, fifo rollover=false, fifo almost full = 17
+    return false;
+  if(!maxim_max30102_write_reg(REG_MODE_CONFIG,0x03))   //0x02 for Red only, 0x03 for SpO2 mode 0x07 multimode LED
+    return false;
+  if(!maxim_max30102_write_reg(REG_SPO2_CONFIG,0x27))  // SPO2_ADC range = 4096nA, SPO2 sample rate (100 Hz), LED pulseWidth (400uS)
+    return false;
+  
+  if(!maxim_max30102_write_reg(REG_LED1_PA,0x24))   //Choose value for ~ 7mA for LED1
+    return false;
+  if(!maxim_max30102_write_reg(REG_LED2_PA,0x24))   // Choose value for ~ 7mA for LED2
+    return false;
+  if(!maxim_max30102_write_reg(REG_PILOT_PA,0x7f))   // Choose value for ~ 25mA for Pilot LED
+    return false;
+  return true;  
+}
+
+bool maxim_max30102_read_fifo(uint32_t *pun_red_led, uint32_t *pun_ir_led)
+/**
+* \brief        Read a set of samples from the MAX30102 FIFO register
+* \par          Details
+*               This function reads a set of samples from the MAX30102 FIFO register
+*
+* \param[out]   *pun_red_led   - pointer that stores the red LED reading data
+* \param[out]   *pun_ir_led    - pointer that stores the IR LED reading data
+*
+* \retval       true on success
+*/
+{
+  uint32_t un_temp;
+  unsigned char uch_temp;
+  *pun_red_led=0;
+  *pun_ir_led=0;
+  char ach_i2c_data[6];
+  
+  //read and clear status register
+  maxim_max30102_read_reg(REG_INTR_STATUS_1, &uch_temp);
+  maxim_max30102_read_reg(REG_INTR_STATUS_2, &uch_temp);
+  
+  ach_i2c_data[0]=REG_FIFO_DATA;
+  if(i2c.write(I2C_WRITE_ADDR, ach_i2c_data, 1, true)!=0)
+    return false;
+  if(i2c.read(I2C_READ_ADDR, ach_i2c_data, 6, false)!=0)
+  {
+    return false;
+  }
+  un_temp=(unsigned char) ach_i2c_data[0];
+  un_temp<<=16;
+  *pun_red_led+=un_temp;
+  un_temp=(unsigned char) ach_i2c_data[1];
+  un_temp<<=8;
+  *pun_red_led+=un_temp;
+  un_temp=(unsigned char) ach_i2c_data[2];
+  *pun_red_led+=un_temp;
+  
+  un_temp=(unsigned char) ach_i2c_data[3];
+  un_temp<<=16;
+  *pun_ir_led+=un_temp;
+  un_temp=(unsigned char) ach_i2c_data[4];
+  un_temp<<=8;
+  *pun_ir_led+=un_temp;
+  un_temp=(unsigned char) ach_i2c_data[5];
+  *pun_ir_led+=un_temp;
+  *pun_red_led&=0x03FFFF;  //Mask MSB [23:18]
+  *pun_ir_led&=0x03FFFF;  //Mask MSB [23:18]
+  
+  
+  return true;
+}
+
+bool maxim_max30102_reset()
+/**
+* \brief        Reset the MAX30102
+* \par          Details
+*               This function resets the MAX30102
+*
+* \param        None
+*
+* \retval       true on success
+*/
+{
+    if(!maxim_max30102_write_reg(REG_MODE_CONFIG,0x40))
+    
+        return false;
+    else
+        return true;    
+}