Diff: MAX30102/MAX30102.cpp

Revision:

1:83ace7df2c63

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/MAX30102/MAX30102.cpp	Mon Apr 16 16:52:36 2018 +0000
@@ -0,0 +1,89 @@
+#include "mbed.h"
+#include "MAX30102.h"
+
+bool MAX30102::write_reg(uint8_t uch_addr, uint8_t uch_data)
+{
+  char ach_i2c_data[2];
+  ach_i2c_data[0]=uch_addr;
+  ach_i2c_data[1]=uch_data;
+  
+  if(_i2c.write(I2C_ADDR, ach_i2c_data, 2, false)==0) return true;
+  else  return false;
+}
+
+bool MAX30102::read_reg(uint8_t uch_addr, uint8_t *puch_data)
+{
+  char ch_i2c_data;
+  ch_i2c_data=uch_addr;
+
+  if(_i2c.write(I2C_ADDR, &ch_i2c_data, 1, true)!=0)  return false;
+
+  if(_i2c.read(I2C_ADDR | 0x01, &ch_i2c_data, 1, false)==0)
+  {
+    *puch_data=(uint8_t) ch_i2c_data;
+    return true;
+  }
+  else
+    return false;
+}
+
+bool MAX30102::init()
+{
+  if(!write_reg(REG_INTR_ENABLE_1,0xc0))  return false;
+  if(!write_reg(REG_INTR_ENABLE_2,0x00))  return false;
+  if(!write_reg(REG_FIFO_WR_PTR,0x00))    return false;
+  if(!write_reg(REG_OVF_COUNTER,0x00))    return false;
+  if(!write_reg(REG_FIFO_RD_PTR,0x00))    return false;
+  if(!write_reg(REG_FIFO_CONFIG,0x0f))    return false;
+  if(!write_reg(REG_MODE_CONFIG,0x03))    return false;
+  if(!write_reg(REG_SPO2_CONFIG,0x27))    return false;
+  if(!write_reg(REG_LED1_PA,0x24))        return false;
+  if(!write_reg(REG_LED2_PA,0x24))        return false;
+  if(!write_reg(REG_PILOT_PA,0x7f))       return false;
+  return true;  
+}
+
+bool MAX30102::read_fifo(uint32_t *pun_red_led, uint32_t *pun_ir_led)
+{
+  uint32_t un_temp;
+  unsigned char uch_temp;
+  *pun_red_led=0;
+  *pun_ir_led=0;
+  char ach_i2c_data[6];
+  
+  read_reg(REG_INTR_STATUS_1, &uch_temp);
+  read_reg(REG_INTR_STATUS_2, &uch_temp);
+  
+  ach_i2c_data[0]=REG_FIFO_DATA;
+  if(_i2c.write(I2C_ADDR, ach_i2c_data, 1, true)!=0) return false;
+  if(_i2c.read(I2C_ADDR | 0x01, 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 MAX30102::reset()
+{
+    if(!write_reg(REG_MODE_CONFIG,0x40))  return false;
+    else  return true;    
+}