#ifndef MAX31856_H
#define MAX31856_H

#include "stm32f3xx_hal.h"

void max31856_init(SPI_HandleTypeDef* spi_port, GPIO_TypeDef* cs_port, uint32_t cs_pin, uint32_t sensor_type);
void max31856_process(void);
float max31856_latest_temp(void);
float max31856_avg_temp(void);

// Thanks to Adafruit:
#define MAX31856_CR0_REG           0x00
#define MAX31856_CR0_AUTOCONVERT   0x80
#define MAX31856_CR0_1SHOT         0x40
#define MAX31856_CR0_OCFAULT1      0x20
#define MAX31856_CR0_OCFAULT0      0x10
#define MAX31856_CR0_CJ            0x08
#define MAX31856_CR0_FAULT         0x04
#define MAX31856_CR0_FAULTCLR      0x02

#define MAX31856_CR1_REG           0x01
#define MAX31856_MASK_REG          0x02
#define MAX31856_CJHF_REG          0x03
#define MAX31856_CJLF_REG          0x04
#define MAX31856_LTHFTH_REG        0x05
#define MAX31856_LTHFTL_REG        0x06
#define MAX31856_LTLFTH_REG        0x07
#define MAX31856_LTLFTL_REG        0x08
#define MAX31856_CJTO_REG          0x09
#define MAX31856_CJTH_REG          0x0A
#define MAX31856_CJTL_REG          0x0B
#define MAX31856_LTCBH_REG         0x0C
#define MAX31856_LTCBM_REG         0x0D
#define MAX31856_LTCBL_REG         0x0E
#define MAX31856_SR_REG            0x0F

#define MAX31856_FAULT_CJRANGE     0x80
#define MAX31856_FAULT_TCRANGE     0x40
#define MAX31856_FAULT_CJHIGH      0x20
#define MAX31856_FAULT_CJLOW       0x10
#define MAX31856_FAULT_TCHIGH      0x08
#define MAX31856_FAULT_TCLOW       0x04
#define MAX31856_FAULT_OVUV        0x02
#define MAX31856_FAULT_OPEN        0x01


#define MAX31856_WRITE_BIT		   0x80

typedef enum
{
  MAX31856_TCTYPE_B  = 0b0000,
  MAX31856_TCTYPE_E  = 0b0001,
  MAX31856_TCTYPE_J  = 0b0010,
  MAX31856_TCTYPE_K  = 0b0011,
  MAX31856_TCTYPE_N  = 0b0100,
  MAX31856_TCTYPE_R  = 0b0101,
  MAX31856_TCTYPE_S  = 0b0110,
  MAX31856_TCTYPE_T  = 0b0111,
  MAX31856_VMODE_G8  = 0b1000,
  MAX31856_VMODE_G32 = 0b1100,
} max31856_thermocoupletype_t;


#endif