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max30101.c
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max30101.c
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#include "max30101.h"
#include "string.h"
#ifdef CC1312R1
#include <ti/sysbios/BIOS.h>
#include <ti/sysbios/knl/Task.h>
#include <ti/sysbios/knl/Clock.h>
#endif
#define MAX30101_ADDRESS 0x57
#define MAX30102_IR_POWER 45
#define MAX30102_RED_POWER 45
#define MAX30102_GREEN_POWER 125
#ifdef CC1312R1
static I2C_Handle i2c;
static I2C_Transaction i2cTransaction;
#endif
static void wait_100_ms()
{
#ifdef CC1312R1
Task_sleep(100 * 1000 / Clock_tickPeriod);
#endif
}
#ifdef CC1312R1
void set_max30101_i2c_instance(I2C_Handle i2cInstance)
{
i2c = i2cInstance;
}
#endif
static uint8_t i2c_write8(uint8_t address, uint8_t reg)
{
uint8_t i2c_state = 0x00;
uint8_t txBuffer = reg;
#ifdef CC1312R1
if (i2c != NULL)
{
i2cTransaction.writeBuf = &txBuffer;
i2cTransaction.readBuf = NULL;
i2cTransaction.slaveAddress = address;
i2cTransaction.writeCount = 1;
i2cTransaction.readCount = 0;
i2c_state = I2C_transfer(i2c, &i2cTransaction);
}
#endif
return i2c_state;
}
static uint8_t i2c_write16(uint8_t address, uint8_t reg, uint8_t value)
{
uint8_t i2c_state = 0x00;
uint8_t txBuffer[2] = { 0x00 };
txBuffer[0] = reg;
txBuffer[1] = value;
#ifdef CC1312R1
if (i2c != NULL)
{
i2cTransaction.writeBuf = &txBuffer;
i2cTransaction.readBuf = NULL;
i2cTransaction.slaveAddress = address;
i2cTransaction.writeCount = 2;
i2cTransaction.readCount = 0;
i2c_state = I2C_transfer(i2c, &i2cTransaction);
}
#endif
return i2c_state;
}
static uint8_t i2c_read_buffer(uint8_t address, uint8_t *read_value,
const uint8_t buffer_size)
{
uint8_t i2c_state = 0x00;
uint8_t rxBuffer[buffer_size];
#ifdef CC1312R1
if (i2c != NULL)
{
i2cTransaction.writeBuf = NULL;
i2cTransaction.readBuf = rxBuffer;
i2cTransaction.slaveAddress = address;
i2cTransaction.writeCount = 0;
i2cTransaction.readCount = buffer_size;
i2c_state = I2C_transfer(i2c, &i2cTransaction);
memcpy(read_value, rxBuffer, buffer_size);
}
#endif
return i2c_state;
}
uint8_t init_max30101()
{
uint8_t i2c_state = 0x01;
i2c_state = i2c_state & i2c_write16(MAX30101_ADDRESS, 0x02, 0x40);
i2c_state = i2c_state & i2c_write16(MAX30101_ADDRESS, 0x03, 0x00);
i2c_state = i2c_state & i2c_write16(MAX30101_ADDRESS, 0x04, 0x00);
i2c_state = i2c_state & i2c_write16(MAX30101_ADDRESS, 0x05, 0x00);
i2c_state = i2c_state & i2c_write16(MAX30101_ADDRESS, 0x06, 0x00);
i2c_state = i2c_state & i2c_write16(MAX30101_ADDRESS, 0x08, 0b00101111);
i2c_state = i2c_state & i2c_write16(MAX30101_ADDRESS, 0x09, 0x07);
i2c_state = i2c_state & i2c_write16(MAX30101_ADDRESS, 0x0A, 0b00100111);
//RED PPG Power Setting
i2c_state = i2c_state
& i2c_write16(MAX30101_ADDRESS, 0x0C, MAX30102_RED_POWER);
//IR PPG Power Setting
i2c_state = i2c_state
& i2c_write16(MAX30101_ADDRESS, 0x0D, MAX30102_IR_POWER);
//GREEN PPG Power Setting
i2c_state = i2c_state
& i2c_write16(MAX30101_ADDRESS, 0x0E, MAX30102_GREEN_POWER);
//GREEN PPG Power Setting
i2c_state = i2c_state
& i2c_write16(MAX30101_ADDRESS, 0x0F, MAX30102_GREEN_POWER);
i2c_state = i2c_state & i2c_write16(MAX30101_ADDRESS, 0x10, 0x7F);
i2c_state = i2c_state & i2c_write16(MAX30101_ADDRESS, 0x11, 0x21);
i2c_state = i2c_state & i2c_write16(MAX30101_ADDRESS, 0x12, 0x03);
i2c_state = i2c_state & i2c_write16(MAX30101_ADDRESS, 0x09, 0x83);
for (uint8_t i = 0; i < 2; i++)
{
wait_100_ms();
}
return i2c_state;
}
uint8_t set_max30101_normal_mode()
{
uint8_t i2c_state = i2c_write16(MAX30101_ADDRESS, 0x09, 0x07);
return i2c_state;
}
uint8_t set_max30101_sleep_mode()
{
uint8_t i2c_state = i2c_write16(MAX30101_ADDRESS, 0x09, 0x83);
return i2c_state;
}
uint8_t get_max30101_ir_red_green(uint32_t *ir, uint32_t *red, uint32_t *green)
{
uint8_t i2c_state = 0x00;
uint8_t read_buffer[9] = { 0x00 };
i2c_state = i2c_write8(MAX30101_ADDRESS, 0x07);
i2c_state = i2c_state & i2c_read_buffer(MAX30101_ADDRESS, read_buffer, 9);
uint32_t value = (read_buffer[0] << 16);
value += (read_buffer[1] << 8);
value += read_buffer[2];
value = value & 0x03FFFF;
*red = value;
value = (read_buffer[3] << 16);
value += (read_buffer[4] << 8);
value += read_buffer[5];
value = value & 0x03FFFF;
*ir = value;
value = (read_buffer[6] << 16);
value += (read_buffer[7] << 8);
value += read_buffer[8];
value = value & 0x03FFFF;
*green = value;
return i2c_state;
}