#ifndef __DAC161P997_H__
#define __DAC161P997_H__
#include "main.h"
#include "gpios.h"
#define TIME_1US TIM1
#define DAC161P997_IO_PORT (DAC161P997_GPIO_Port)
#define DAC161P997_IO_PIN (DAC161P997_Pin)

#define DAC161P997_CURRENT_SLOPE 2730.625f // adc = (current / 24) * 0xffff

// Symbol Periods
#define DUTY_CYCLE_100 (1000U) // (CPU_CLK / BAUD_RATE)
#define DUTY_CYCLE_75 (DUTY_CYCLE_100 * 0.75f)
#define DUTY_CYCLE_50 (DUTY_CYCLE_100 * 0.50f)
#define DUTY_CYCLE_25 (DUTY_CYCLE_100 * 0.25f)

/************************************************************
 * TI DAC161P997 REGISTER SET ADDRESSES
 ************************************************************/
#define DAC161P997_LCK_REG (0x0000)
#define DAC161P997_CONFIG1_REG (0x0100)
#define DAC161P997_CONFIG2_REG (0x0200)
#define DAC161P997_CONFIG3_REG (0x0300)
#define DAC161P997_ERR_LOW_REG (0x0400)
#define DAC161P997_ERR_HIGH_REG (0x0500)

// TI DAC161P997 Register Bits
#define DAC161P997_LCK_REG_LOCK (0x00AA) // any value other than 0x95
#define DAC161P997_LCK_REG_UNLOCK (0x0095)
#define DAC161P997_CONFIG1_REG_RST (0x0001)
#define DAC161P997_CONFIG1_REG_NOP (0 * 0x08u)
#define DAC161P997_CONFIG1_REG_SET_ERR (1 * 0x08u)
#define DAC161P997_CONFIG1_REG_CLEAR_ERR (2 * 0x08u)
#define DAC161P997_CONFIG1_REG_NOP3 (3 * 0x08u)
#define DAC161P997_CONFIG2_REG_LOOP (0x0001)
#define DAC161P997_CONFIG2_REG_CHANNEL (0x0002)
#define DAC161P997_CONFIG2_REG_PARITY (0x0004)
#define DAC161P997_CONFIG2_REG_FRAME (0x0008)
#define DAC161P997_CONFIG2_REG_ACK_EN (0x0010)
#define DAC161P997_CONFIG3_REG_RX_ERR_CNT_16 (0x000F)
#define DAC161P997_CONFIG3_REG_RX_ERR_CNT_8 (0x0007)
#define DAC161P997_CONFIG3_REG_RX_ERR_CNT_1 (0x0000)

// Tags
#define DACCODE_WRITE (0x00)
#define CONFIG_WRITE (0x01)

// Valid Symbols
#define ZERO_SYM (0x00)
#define ONE_SYM (0x01)
#define IDLE_SYM (0x02)
#define STATIC_LOW_SYM (0x03)

// DAC Codes for different currents
#define DACCODE_0mA (0x0000)
#define DACCODE_4mA (0x2AAA)
#define DACCODE_8mA (0x5555)
#define DACCODE_12mA (0x7FFF)
#define DACCODE_16mA (0xAAAA)
#define DACCODE_20mA (0xD555)
#define DACCODE_24mA (0xFFFF)

typedef enum
{
    DAC161P997_IDLE_SYM,

} dac161p997_e;
typedef struct
{
    gpio_t *io;
    uint8_t count;
} dac161p997_t;

void dac161p997_output_0(void);
void dac161p997_output_1(void);
void dac161p997_output_d(void);
void dac161p997_output_symbol(uint8_t sym);
void dac161p997_swif_write_reg(uint16_t data, uint8_t tag);

extern void dac161p997_output_current(float32 current);
extern void dac161p997_init(void);
#endif