STM32 ADS1115.docx

1、STM32 ADS1115STM32 ADS1115#include stm32f10x.h #include ADS1115.h #include stm32f10x_i2c.h #include LCD12864.h #include core_cm3.h #ifndef _cplusplus typedef enum FALSE = 0, TRUE = !FALSE bool; #endif /*-Private Value-*/ enum TestPort BatVal,BatCur; unsigned char AD_BUF2=0; #define SCLH GPIOB-BSRR =

2、 GPIO_Pin_6 #define SCLL GPIOB-BRR = GPIO_Pin_6 #define SDAH GPIOB-BSRR = GPIO_Pin_7 #define SDAL GPIOB-BRR = GPIO_Pin_7 #define SCLread GPIOB-IDR & GPIO_Pin_6 #define SDAread GPIOB-IDR & GPIO_Pin_7 void I2C_GPIO_Config(void) GPIO_InitTypeDef GPIO_InitStructure; RCC_APB2PeriphClockCmd(RCC_APB2Periph

3、_GPIOB, ENABLE); / Configure I2C1 pins: SCL and SDA GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_OD; GPIO_Init(GPIOB, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7; GPIO_InitStructure.GPIO_Sp

4、eed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_OD; GPIO_Init(GPIOB, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;/assert管脚 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN; GPIO_Init(GPIOB, &GPIO_InitStructure); vo

5、id I2C_delay(void) _nop(); bool I2C_Start(void) SDAH; SCLH; I2C_delay(); if(!SDAread)return FALSE; /SDA线为低则总线忙，退出 SDAL; I2C_delay(); if(SDAread) return FALSE; /SDA线为高则总线出错，退出 SDAL; I2C_delay(); return TRUE; void I2C_Stop(void) SCLL; I2C_delay(); SDAL; I2C_delay(); SCLH; I2C_delay(); SDAH; I2C_delay(

6、); void I2C_Ack(void) SCLL; I2C_delay(); SDAL; I2C_delay(); SCLH; I2C_delay(); SCLL; I2C_delay(); void I2C_NoAck(void) SCLL; I2C_delay(); SDAH; I2C_delay(); SCLH; I2C_delay(); SCLL; I2C_delay(); bool I2C_WaitAck(void) /返回为1有ACK，返回0无ACK SCLL; I2C_delay(); SDAH; I2C_delay(); SCLH; I2C_delay(); if(SDAr

7、ead) SCLL; return FALSE; SCLL; return TRUE; void I2C_SendByte(u8 SendByte) /数据从高位到低位/ u8 i=8; while(i-) SCLL; I2C_delay(); if(SendByte&0x80) SDAH; else SDAL; SendByte=1; I2C_delay(); SCLH; I2C_delay(); SCLL; u8 I2C_ReceiveByte(void) /数据从高位到低位/ u8 i=8; u8 ReceiveByte=0; SDAH; while(i-) ReceiveByte=1;

8、 SCLL; I2C_delay(); SCLH; I2C_delay(); if(SDAread) ReceiveByte|=0x01; SCLL; return ReceiveByte; /* * 名 称: ADS1115_Init * 功 能: 初始化ADS1115 * 入口参数:id:设备地址;write_address寄存器地址 ;byte1:高字节配置;byte2:低字节 最高转换速度 * 出口参数: 无 * 说 明: 完成ADS1115的配置寄存器的初始化工作 */ void ADS1115_Init(unsigned char id,unsigned char write_ad

9、dress,unsigned char byte1,unsigned char byte2) while(!I2C_Start(); I2C_SendByte(id);/写器件地址 while(!I2C_WaitAck(); I2C_SendByte(write_address);/寄存器地址 while(!I2C_WaitAck(); I2C_SendByte(byte1);/发送数据 while(!I2C_WaitAck(); I2C_SendByte(byte2);/发送数据 while(!I2C_WaitAck(); I2C_Stop(); I2C_delay();I2C_delay(

10、); /* * 名 称: I2C_AD1115_Point * 功 能: 指向ADS1115内部特定的寄存器 * 入口参数:id:设备地址;write_address寄存器地址 * 出口参数: 无 * 说 明: 指向ADS1115内部特定的寄存器 */ void I2C_AD1115_Point(unsigned char id,unsigned char write_address) while(!I2C_Start(); /产生起始条件 I2C_SendByte(id);/写器件地址 /向设备发送设备地址 while(!I2C_WaitAck(); /等待ACK I2C_SendByte(

11、write_address);/发送数据 /寄存器地址 while(!I2C_WaitAck(); I2C_Stop(); /产生结束信号 /* * 名 称: I2C_Read2 * 功 能: 读ADS1115转换结果 * 入口参数:id:设备地址;read_address寄存器地址 * 出口参数: 无 * 说 明: 转换的值放在BUF【2】 */ void I2C_Read2(unsigned char id, unsigned char read_address) while(!I2C_Start(); /产生起始条件 I2C_SendByte(id);/写器件地址 /发送地址 while

12、(!I2C_WaitAck(); /等待ACK AD_BUF0 = I2C_ReceiveByte(); I2C_Ack(); AD_BUF1 = I2C_ReceiveByte(); I2C_NoAck(); I2C_Stop(); /* * 名 称: StartChannel * 功 能: 选择通道测量 * 入口参数: 通道序号0、1、2、3 * 出口参数: 采样值 * 说 明: 完成ADS1115的采样工作 */ float StartChannlel(char Channel) float AD_Val=0; int temp=0; if(Channel=BatVal) /First

13、(1001000)Address+0; Second :Point to the Config resgister ADS1115_Init(0x90,0x01,0x02,0xe0);/量程4.096;Continuous conversionmode;860SPS; Out=AIN0-AIN1; if(Channel=BatCur) ADS1115_Init(0x90,0x01,0x36,0xe0);/量程1.024;Continuous conversionmode;860SPS;Out=AIN2-AIN3;00110110 / if(Channel=2) / / ADS1115_Init

14、(0x90,0x01,0x62,0xe0);/量程4.096;Continuous conversionmode;860SPS; / / if(Channel=3) / / ADS1115_Init(0x90,0x01,0x72,0xe0);/量程4.096;Continuous conversionmode;860SPS; / while(GPIO_ReadInputDataBit(GPIOB, GPIO_Pin_5); I2C_AD1115_Point(0x90,0x00); I2C_Read2(0x91,0x00); temp=(AD_BUF0 8) | AD_BUF1; AD_Val=temp/32768.0; return AD_Val;