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183 lines
8.7 KiB
183 lines
8.7 KiB
//i2c_ads1115.h
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#ifndef __IIC_ADS1115_H
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#define __IIC_ADS1115_H
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#include "i2c.h"
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#define ADS1115_WRITE_ADDRESS 0x90
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#define ADS1115_READ_ADDRESS 0x91
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//以下两个预处理作为配置寄存器预处理要更改其配在这里更改
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//也可以添加新的预处理对不同通道的采集或者选取不同的采样速率等
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#define CONFIG_REG_H ADS1115_REG_CONFIG_OS_START|\
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ADS1115_REG_CONFIG_MUX_SINGLE_0|\
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ADS1115_REG_CONFIG_PGA_4|\
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ADS1115_REG_CONFIG_MODE_SINGLE
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#define CONFIG_REG_L ADS1115_REG_CONFIG_DR_128|\
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ADS1115_REG_CONFIG_COMP_MODE_TRADITIONAL|\
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ADS1115_REG_CONFIG_COMP_POL_LOW|\
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ADS1115_REG_CONFIG_COMP_LAT_NONLATCH|\
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ADS1115_REG_CONFIG_COMP_QUE_DIS
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/***************/
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//配置寄存器说明
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//config register
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/*CRH[15:8](R/W)
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BIT 15 14 13 12 11 10 9 8
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NAME OS MUX2 MUX1 MUX0 PGA2 PGA1 PGA0 MODE
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CRL[7:0] (R/W)
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BIT 7 6 5 4 3 2 1 0
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NAME DR0 DR1 DR0 COM_MODE COM_POL COM_LAT COM_QUE1 COM_QUE0
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-----------------------------------------------------------------------------------
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* 15 | OS | 运行状态会单词转换开始
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* | | 写时:
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* | | 0 : 无效
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* | | 1 : 开始单次转换处于掉电状态时
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* | | 读时:
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* | | 0 : 正在转换
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* | | 1 : 未执行转换
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* -----------------------------------------------------------------------------------
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* 14:12 | MUX [2:0] | 输入复用多路配置
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* | | 000 : AINP = AIN0 and AINN = AIN1 (default)
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* | | 001 : AINP = AIN0 and AINN = AIN3
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* | | 010 : AINP = AIN1 and AINN = AIN3
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* | | 011 : AINP = AIN2 and AINN = AIN3
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* | | 100 : AINP = AIN0 and AINN = GND
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* | | 101 : AINP = AIN1 and AINN = GND
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* | | 110 : AINP = AIN2 and AINN = GND
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* | | 111 : AINP = AIN3 and AINN = GND
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* -----------------------------------------------------------------------------------
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* 11:9 | PGA [2:0] | 可编程增益放大器配置(FSR full scale range)
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* | | 000 : FSR = В±6.144 V
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* | | 001 : FSR = В±4.096 V
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* | | 010 : FSR = В±2.048 V (默认)
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* | | 011 : FSR = В±1.024 V
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* | | 100 : FSR = В±0.512 V
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* | | 101 : FSR = В±0.256 V
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* | | 110 : FSR = В±0.256 V
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* | | 111 : FSR = В±0.256 V
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* -----------------------------------------------------------------------------------
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* 8 | MODE | 工作模式
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* | | 0 : 连续转换
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* | | 1 : 单词转换
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* -----------------------------------------------------------------------------------
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* 7:5 | DR [2:0] | 采样频率
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* | | 000 : 8 SPS
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* | | 001 : 16 SPS
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* | | 010 : 32 SPS
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* | | 011 : 64 SPS
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* | | 100 : 128 SPS (默认)
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* | | 101 : 250 SPS
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* | | 110 : 475 SPS
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* | | 111 : 860 SPS
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* -----------------------------------------------------------------------------------
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* 4 | COMP_MODE | 比较器模式
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* | | 0 : 传统比较器 (default)
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* | | 1 : 窗口比较器
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* -----------------------------------------------------------------------------------
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* 3 | COMP_POL | Comparator polarity
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* | | 0 : 低电平有效 (default)
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* | | 1 : 高电平有效
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* -----------------------------------------------------------------------------------
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* 2 | COMP_LAT | Latching comparator
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* | | 0 : 非锁存比较器. (default)
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* | | 1 : 锁存比较器.
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* -----------------------------------------------------------------------------------
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* 1:0 | COMP_QUE [1:0] | Comparator queue and disable
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* | | 00 : Assert after one conversion
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* | | 01 : Assert after two conversions
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* | | 10 : Assert after four conversions
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* | | 11 : 禁用比较器并将ALERT/RDY设置为高阻抗 (default)
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* -----------------------------------------------------------------------------------
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*/
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//地址指针寄存器
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#define ADS1015_REG_POINTER_CONVERT (0x00)
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#define ADS1015_REG_POINTER_CONFIG (0x01)
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#define ADS1015_REG_POINTER_LOWTHRESH (0x02)
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#define ADS1015_REG_POINTER_HITHRESH (0x03)
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// 单次转换开始
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#define ADS1115_REG_CONFIG_OS_START (0x1U << 7)//设备单次转换开启 高字节的最高位
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#define ADS1115_REG_CONFIG_OS_NULL (0x0U << 7)
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//输入引脚选择和输入方式选择
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#define ADS1115_REG_CONFIG_MUX_Diff_01 (0x0U << 4) // 差分输入0引脚和1引脚
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#define ADS1115_REG_CONFIG_MUX_Diff_03 (0x1U << 4) // 差分输入0引脚和3引脚
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#define ADS1115_REG_CONFIG_MUX_Diff_13 (0x2U << 4) // 差分输入1引脚和3引脚
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#define ADS1115_REG_CONFIG_MUX_Diff_23 (0x3U << 4) // 差分输入2引脚和3引脚
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#define ADS1115_REG_CONFIG_MUX_SINGLE_0 (0x4U << 4) //单端输入 0
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#define ADS1115_REG_CONFIG_MUX_SINGLE_1 (0x5U << 4) //单端输入 1
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#define ADS1115_REG_CONFIG_MUX_SINGLE_2 (0x6U << 4) //单端输入 2
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#define ADS1115_REG_CONFIG_MUX_SINGLE_3 (0x7U << 4) //单端输入 3
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//量程选择
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#define ADS1115_REG_CONFIG_PGA_6 (0x0U << 1) // +/- 6.1144
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#define ADS1115_REG_CONFIG_PGA_4 (0x1U << 1) // +/- 4.096
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#define ADS1115_REG_CONFIG_PGA_2 (0x2U << 1) // +/- 2.048
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#define ADS1115_REG_CONFIG_PGA_1 (0x3U << 1) // +/- 1.024
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#define ADS1115_REG_CONFIG_PGA_05 (0x4U << 1) // +/- 0.512
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#define ADS1115_REG_CONFIG_PGA_02 (0x5U << 1) // +/- 0.256
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//运行方式
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#define ADS1115_REG_CONFIG_MODE_SINGLE (0x1U << 0) // 单次
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#define ADS1115_REG_CONFIG_MODE_CONTIN (0x0U << 0) //连续转换
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//转换速率
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#define ADS1115_REG_CONFIG_DR_8 (0x0U << 5)
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#define ADS1115_REG_CONFIG_DR_16 (0x1U << 5)
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#define ADS1115_REG_CONFIG_DR_32 (0x2U << 5)
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#define ADS1115_REG_CONFIG_DR_64 (0x3U << 5)
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#define ADS1115_REG_CONFIG_DR_128 (0x4U << 5)
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#define ADS1115_REG_CONFIG_DR_250 (0x5U << 5)
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#define ADS1115_REG_CONFIG_DR_475 (0x6U << 5)
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#define ADS1115_REG_CONFIG_DR_860 (0x7U << 5)
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//比较器模式
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#define ADS1115_REG_CONFIG_COMP_MODE_TRADITIONAL (0x0U << 4)//默认
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#define ADS1115_REG_CONFIG_COMP_MODE_WINDOW (0x1U << 4)
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#define ADS1115_REG_CONFIG_COMP_POL_LOW (0x0U << 3)//默认
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#define ADS1115_REG_CONFIG_COMP_POL_HIG (0x1U << 3)
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#define ADS1115_REG_CONFIG_COMP_LAT_NONLATCH (0x0U << 2)
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#define ADS1115_REG_CONFIG_COMP_LAT_LATCH (0x1U << 2)
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#define ADS1115_REG_CONFIG_COMP_QUE_ONE (0x0U << 0)
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#define ADS1115_REG_CONFIG_COMP_QUE_TWO (0x1U << 0)
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#define ADS1115_REG_CONFIG_COMP_QUE_THR (0x2U << 0)
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#define ADS1115_REG_CONFIG_COMP_QUE_DIS (0x3U << 0)
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int ads1115_test(I2C_HandleTypeDef ads1115_I2cHandle);
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void ads1115_config_register(I2C_HandleTypeDef ads1115_I2cHandle,uint8_t pointADD,uint8_t configH,uint8_t configL);
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int16_t ads1115_read_data(I2C_HandleTypeDef ads1115_I2cHandle);
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double ads1115_get_voltage_val(I2C_HandleTypeDef ads1115_I2cHandle,uint8_t pointADD,uint8_t configH,uint8_t configL);
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#endif
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/*
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步骤一：write to config register(写配置寄存器）
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1：发送从机地址0x90（写）
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2：发送0x01 （指向配置寄存器）
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3：配置config register
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发送字节：0x84（高八位）
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发送字节：0x83（低八位）
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步骤二：write to pointer register(转向转换寄存器)
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1:发送从机地址0x90（写）
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2:发送0x00（指向转换寄存器）
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步骤三：read conversion register(读取转换寄存器的数据)
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1：发送从机地址0x91（读）
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2：接收转换寄存器的高八位
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3：接收转换寄存器的低八位
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*/ |