#ifndef __ADS1220_H
#define __ADS1220_H
// #include "main.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "esp_system.h"
#include "driver/spi_master.h"
#include "driver/gpio.h"

typedef uint8_t 	u8;
typedef uint32_t 	u32;
typedef int32_t 	s32;


#define ADS1220_HOST 		SPI2_HOST
#define SPI2_PIN_NUM_MISO 	6
#define SPI2_PIN_NUM_MOSI 	5
#define SPI2_PIN_NUM_CLK 	16
#define SPI2_PIN_NUM_CS 	15
#define PARALLEL_LINES 		16

#define ADS1220_nCS_HIGH() 	gpio_set_level(GPIO_NUM_38, 1)
#define ADS1220_nCS_LOW() 	gpio_set_level(GPIO_NUM_38, 0)

#define ADS1220_CMD_WREG 		0x40	  
#define ADS1220_CMD_RREG 		0x20	  
#define ADS1220_CMD_RESET 		0x06	  
#define ADS1220_CMD_START 		0x08	   
#define ADS1220_CMD_POWERDOWN 	0x02 
#define ADS1220_CMD_RDATA 		0x10	  

#define Channal1 		0x00 
#define Channal2 		0x10 
#define Channal3 		0x20 
#define Channal4 		0x30 

#define ADS1220_REG0 	0x00 
#define ADS1220_REG1 	0x01 
#define ADS1220_REG2 	0x02 
#define ADS1220_REG3 	0x03 

#define PGAGain1 		0x00	
#define PGAGain2 		0x02	
#define PGAGain4 		0x04	
#define PGAGain8 		0x06	
#define PGAGain16 		0x08	
#define PGAGain32 		0x0A	
#define PGAGain64 		0x0C	
#define PGAGain128 		0x0E 

#define ADS1220_Standby 	0	 
#define ADS1220_ConvStart 	1	 
#define ADS1220_ConvFinish 	2 

#define ADS1220_Channal1 	0 
#define ADS1220_Channal2 	1 
#define ADS1220_Channal3 	2 
#define ADS1220_Channal4 	3 

#define GPIO_INPUT_IO_39     	7
#define GPIO_INPUT_PIN_SEL 		(1ULL << GPIO_INPUT_IO_39)
#define ESP_INTR_FLAG_DEFAULT	0



typedef struct
{

	int ch0_4ma;
	int ch0_12ma;
	float ch0_4ma_yl;
	float ch0_12ma_yl;
	
	int ch1_4ma;
	int ch1_12ma;
	float ch1_4ma_yl;
	float ch1_12ma_yl;
	
	int ch2_4ma;
	int ch2_12ma;
	float ch2_4ma_yl;
	float ch2_12ma_yl;
}ads_cali_t;

//extern ads_cali_t ads_cali;


uint32_t get_now_20us(void);
int32_t tim_diff(uint32_t a,uint32_t b);
int ADS1220_get_rate(void);
void ADS1220_set_rate(int i);
void ADS1220_Init(void);                // ADS1220��ʼ�� 
void ADS1220_Config(void);              // ADS1220����  
void ADS1220_StartConv(u8 channal);     // ADS1220����ת�� 
void ADS1220_Reset(void);               // ADS1220��λ 
void ADS1220_PowerDown(void);           // ADS1220�������ģʽ 
void ADS1220_PGASet(u8 gain);           // ADS1220 PGA����  
void ADS1220_WriteCommand(u8 cmd);      // ADS1220��� 
s32 ADS1220_ReadData(void);             // ADS1220������ 
void ADS1220_WriteReg(u8 reg,u8 dat);   // ADS1220д�Ĵ��� 
u8 ADS1220_ReadReg(u8 reg);             // ADS1220���Ĵ��� 
u8 ADS1220_ReadWriteByte(u8 dat);       // ��SPI������д��һ�ֽ� 
u32 ADS1220_ReadWrite24Bits(u32 dat);   // ��ADS1220�������24Bits 

void zero_flow1(void);
int scale(int raw, int raw_min, int raw_max,int eng_min, int eng_max);
#endif