基于STM32的ADS1015程序

#include "main.h" #include "usr_i2c.h" #define ACK 0 #define NACK 1 #define I2C_WRITE 0 #define I2C_READ 1 #define SDA_PORT GPIOA #define SCL_PORT GPIOA #define HAL_SDA_PIN GPIO_PIN_10 #define SDA_PIN GPIO_PIN_10 #define SCL_PIN GPIO_PIN_11 #define READ_SDA HAL_GPIO_ReadPin(SDA_PORT,HAL_SDA_PIN) #define IIC_SDA_1 HAL_GPIO_WritePin(SDA_PORT,SDA_PIN,1) #define IIC_SDA_0 HAL_GPIO_WritePin(SDA_PORT,SDA_PIN,0) #define IIC_SCL_1 HAL_GPIO_WritePin(SCL_PORT,SCL_PIN,1) #define IIC_SCL_0 HAL_GPIO_WritePin(SCL_PORT,SCL_PIN,0) uint8_t adcTest2=10; uint8_t adcTest3=10; static uint16_t ConfigRegValue = 0; /*--------------------------------------------------------------*/ void I2C_Init(void) { GPIO_InitTypeDef GPIO_InitStruct = {0}; GPIO_InitStruct.Pin = GPIO_PIN_11; GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_OD; GPIO_InitStruct.Pull = GPIO_NOPULL; GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_MEDIUM; HAL_GPIO_Init(GPIOA, &GPIO_InitStruct); } /*-------------------------------------------------------------*/ //sda输出配置 static void SDA_OUT(void) { GPIO_InitTypeDef GPIO_InitStruct; GPIO_InitStruct.Pin = SDA_PIN; GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_OD; GPIO_InitStruct.Pull = GPIO_NOPULL; GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_MEDIUM; HAL_GPIO_Init(GPIOA, &GPIO_InitStruct); } //sda输入配置 static void SDA_IN(void) { GPIO_InitTypeDef GPIO_InitStruct; GPIO_InitStruct.Pin = HAL_SDA_PIN; GPIO_InitStruct.Mode = GPIO_MODE_INPUT; GPIO_InitStruct.Pull = GPIO_NOPULL; GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_MEDIUM; HAL_GPIO_Init(GPIOA, &GPIO_InitStruct); } //延迟 static void BSP_Delay_us(uint16_t us) { uint32_t cnt = us*50; while(cnt--); } //i2c 启动 static void I2C_Start(void) { SDA_OUT(); IIC_SDA_1; IIC_SCL_1; BSP_Delay_us(10); IIC_SDA_0; BSP_Delay_us(10); IIC_SCL_0; } //i2c 停止 static void I2C_Stop(void) { SDA_OUT(); IIC_SCL_0; IIC_SDA_0; BSP_Delay_us(10); IIC_SCL_1; BSP_Delay_us(10); IIC_SDA_1; BSP_Delay_us(10); } //等待ack static uint8_t I2C_WaitAck(void) { uint8_t ucErrTime=0; IIC_SDA_1; SDA_IN(); BSP_Delay_us(10); IIC_SCL_1; BSP_Delay_us(10); while(READ_SDA) { ucErrTime++; if(ucErrTime>50) { I2C_Stop(); return 1; } BSP_Delay_us(3); } IIC_SCL_0; return 0; } //master发送ack static void I2C_SendAck(void) { SDA_OUT(); IIC_SCL_0; IIC_SDA_0; BSP_Delay_us(10); IIC_SCL_1; BSP_Delay_us(10); IIC_SCL_0; } //i2c nack static void IIC_NAck(void) { SDA_OUT(); IIC_SCL_0; IIC_SDA_1; BSP_Delay_us(10); IIC_SCL_1; BSP_Delay_us(10); IIC_SCL_0; } //i2c发送数据 static uint8_t I2C_SendByte(uint8_t txd) { uint8_t t; SDA_OUT(); IIC_SCL_0; BSP_Delay_us(10); for(t=0;t<8;t++) { if((txd&0x80) == 0x80) { IIC_SDA_1; }else { IIC_SDA_0; } txd<<=1; BSP_Delay_us(10); IIC_SCL_1; BSP_Delay_us(10); IIC_SCL_0; BSP_Delay_us(10); } //检测ACK if(I2C_WaitAck() !=0) return 1; else return 0; } //i2c读数据 static uint8_t I2C_RcvByte(void) { unsigned char i,receive=0x00; SDA_IN(); for(i=0;i<8;i++ ) { IIC_SCL_1; BSP_Delay_us(10); receive<<=1; if(READ_SDA == 1) { receive += 0x01; } BSP_Delay_us(10); IIC_SCL_0; BSP_Delay_us(10); } //ACK I2C_SendAck(); return receive; } /*--------------------------------ADS1015----------------------------*/ //读寄存器 uint8_t ADS1015_readReg(uint8_t regadd,uint16_t* value) { uint16_t ret; uint8_t Hdata,Ldata; I2C_Start(); ret=I2C_SendByte(ADS1015ADD|I2C_WRITE); if(ret!=0) { I2C_Stop(); return 1; } ret=I2C_SendByte(regadd); if(ret!=0) { I2C_Stop(); return 2; } I2C_Start(); ret=I2C_SendByte(ADS1015ADD|I2C_READ); if(ret!=0) { I2C_Stop(); return 3; } Hdata=I2C_RcvByte(); I2C_SendAck(); Ldata=I2C_RcvByte(); I2C_SendAck(); I2C_Stop(); *value = Hdata; *value <<= 8; *value += Ldata; return 0; } //写寄存器 uint8_t ADS1015_writeReg(uint8_t regadd,uint16_t value) { int ret; uint8_t Hdata,Ldata; Hdata = value >> 8; Ldata = value & 0x00ff; I2C_Start(); ret=I2C_SendByte(ADS1015ADD|I2C_WRITE); //发送地址 写入 if(ret!=0) { I2C_Stop(); return 1; } ret=I2C_SendByte(regadd); //目的寄存器地址 if(ret!=0) { I2C_Stop(); return 2; } ret=I2C_SendByte(Hdata); //写入值的高位 if(ret!=0) { I2C_Stop(); return 3; } ret=I2C_SendByte(Ldata);//写入值的低位 if(ret!=0) { I2C_Stop(); return 3; } I2C_Stop(); return 0; } //初始化-配置 int ADS1015_init(void) { uint16_t con=0; uint16_t rcon=0; uint8_t ret; I2C_Init();//初始化端口 ConfigRegValue |= REG_STARTCONVERSION; ConfigRegValue |= CHAN_AIN1_GND; ConfigRegValue |= PGA_FS4096; ConfigRegValue |= OPERATIONAL_CONT; ConfigRegValue |= DR_860SPS; ConfigRegValue |= TRADITIONAL_COM; ConfigRegValue |= NON_LATCHING; ConfigRegValue |= DIS_CONVERSION; ret = ADS1015_writeReg(CONFIG_REG,ConfigRegValue); if(ret != 0) { return ret; } return 0; } //读数据 uint16_t ADS1015_readData(uint16_t *adcdata) { return ADS1015_readReg(CONV_REG,adcdata); } //获取总线电压 放大10倍 uint16_t ADS1015_getBusVoltage(uint16_t *busVolt) { uint8_t ret =0; uint16_t val = 0; //读取值 ret = ADS1015_readReg(CONV_REG,&val); if(ret!=0) { return 2; } //计算实际值 uint32_t temp = 0; val >>= 4; temp = val * 96; temp /= 100; *busVolt = (uint16_t)temp; return 0; } //获取油门电压 放大10倍 uint16_t ADS1015_getAccVoltage(uint16_t *accVolt) { uint8_t ret =0; uint16_t val = 0; //读取值 ret = ADS1015_readReg(CONV_REG,&val); if(ret!=0) { return 2; } //计算油门电压 val >>= 4; val *= 6; val /= 100; *accVolt = val; return 0; }