STM32F103C8T6硬件I2C2成功驱动ADS1115源代码

#include "ADS1115.h" #include "stm32f10x_i2c.h" #include "delay.h" #include <stdbool.h> unsigned char BUF[8]; void I2C_GPIO_ADS1115_Init(){ GPIO_InitTypeDef GPIO_InitStructure; I2C_InitTypeDef I2C_InitStructure; RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C2,ENABLE); RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO | RCC_APB2Periph_GPIOB,ENABLE); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10 | GPIO_Pin_11;// SCL SDA GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD; //硬件I2C2 GPIO_Init(GPIOB, &GPIO_InitStructure); I2C_DeInit(I2C2);//使用I2C2 I2C_InitStructure.I2C_Mode = I2C_Mode_I2C; I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2; I2C_InitStructure.I2C_OwnAddress1 = 0xA0;//主机的I2C地址,随便写的 I2C_InitStructure.I2C_Ack = I2C_Ack_Enable; I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit; I2C_InitStructure.I2C_ClockSpeed = 100000;//100K I2C_Cmd(I2C2, ENABLE); I2C_Init(I2C2, &I2C_InitStructure); } //---------------------------------------------------------// void AD_init(unsigned char id,unsigned char write_address,unsigned char byte1,unsigned char byte2) { I2C_GenerateSTART(I2C2,ENABLE); //产生起始条件 while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_MODE_SELECT)); //等待ACK I2C_Send7bitAddress(I2C2,id,I2C_Direction_Transmitter); //向设备发送设备地址 while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED)); //等待ACK I2C_SendData(I2C2, write_address);//配置寄存器 //寄存器地址 while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED)); //等待ACK I2C_SendData(I2C2, byte1);//c-an0 d-an1 e-an2 f-an3 0->6.144 2->4.096,高字节配置 //发送数据 while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED)); //发送完成 I2C_SendData(I2C2, byte2);//低字节 最高转换速度 while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED)); //发送完成 I2C_GenerateSTOP(I2C2, ENABLE); //产生结束信号 } //----------------------------------------------------// void I2C_ADpoint(unsigned char id,unsigned char write_address) { I2C_GenerateSTART(I2C2,ENABLE); //产生起始条件 while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_MODE_SELECT)); //等待ACK I2C_Send7bitAddress(I2C2,id,I2C_Direction_Transmitter); //向设备发送设备地址 while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED)); //等待ACK I2C_SendData(I2C2, write_address); //寄存器地址 while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED)); I2C_GenerateSTOP(I2C2, ENABLE); //产生结束信号 } //----------------------------------------------------------// void I2C_Read2(unsigned char id, unsigned char read_address) { while(I2C_GetFlagStatus(I2C2, I2C_FLAG_BUSY)); //等待I2C I2C_GenerateSTART(I2C2, ENABLE); //产生起始信号 while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_MODE_SELECT)); //EV5 I2C_Send7bitAddress(I2C2, id, I2C_Direction_Transmitter); //发送地址 while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED)); //EV6 I2C_Cmd(I2C2, ENABLE); //重新设置可以清楚EV6 I2C_SendData(I2C2, read_address); //发送读得地址 while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED)); //EV8 I2C_GenerateSTART(I2C2, ENABLE); //重新发送 while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_MODE_SELECT)); //EV5 I2C_Send7bitAddress(I2C2, id, I2C_Direction_Receiver); //发送读地址 while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED)); //EV6 while(!(I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_RECEIVED))); BUF[1] = I2C_ReceiveData(I2C2); I2C_GenerateSTOP(I2C2, ENABLE); I2C_AcknowledgeConfig(I2C2, DISABLE);//关闭应答和停止条件产生 while(!(I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_RECEIVED))); BUF[2] = I2C_ReceiveData(I2C2); I2C_AcknowledgeConfig(I2C2, ENABLE); } //------------------------------------------// u16 read_ADS1115() { int valu; AD_init(0x90,0x01,0xc2,0xe2); //器件地址90，配置寄存器01，寄存器高位，寄存器低位e2 //高字节配置：c-an0 d-an1 e-an2 f-an3 0->6.144 2->4.096 DelayMs(1); I2C_ADpoint(0x90,0x00); DelayMs(2); I2C_Read2(0x91,0x00); valu=(BUF[1] << 8) | BUF[2]; if(valu>0x7fff)valu-=0xffff; return valu; } void I2C2_WriteData(uint8_t addr, uint8_t dataH, uint8_t dataL){ while(I2C_GetFlagStatus(I2C2, I2C_FLAG_BUSY)); I2C_GenerateSTART(I2C2, ENABLE);//开启I2C2 while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_MODE_SELECT));/*EV5,主模式*/ I2C_Send7bitAddress(I2C2, 0x90, I2C_Direction_Transmitter);//器件地址 -- 默认0x90 while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED)); I2C_SendData(I2C2, addr);//寄存器地址 while (!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED)); I2C_SendData(I2C2, dataH);//发送数据 while (!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED)); I2C_SendData(I2C2, dataL);//发送数据 while (!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED)); I2C_GenerateSTOP(I2C2, ENABLE);//关闭I2C2总线 } bool ADS1115_Init(){ I2C_GPIO_ADS1115_Init(); DelayMs(100); return true; }