stm32用硬件i2c读取16位ADADS.doc

#include stm32f10x.h#include math.h#include delay.c /包含delay_us(-); delay_ms(-); unsigned char BUF8; /-结构体声明-/void RCC_Configuration(void) /打开各个模块时钟 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD, ENABLE); RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOE, ENABLE); RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE); RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE); RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2,ENABLE); RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C1, ENABLE); /-/void I2C_Configuration(void) /硬件iic初始化 I2C_InitTypeDef I2C_InitStructure; I2C_InitStructure.I2C_Mode = I2C_Mode_I2C; I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2; I2C_InitStructure.I2C_OwnAddress1 = 0xA0; I2C_InitStructure.I2C_Ack = I2C_Ack_Enable; I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit; I2C_InitStructure.I2C_ClockSpeed = 100000; I2C_Cmd(I2C1, ENABLE); I2C_Init(I2C1, &I2C_InitStructure);/-/void USART2_Configuration(void) /串口配置初始化：USART2USART_InitTypeDef USART_InitStructure;USART_InitStructure.USART_BaudRate = 14400;USART_InitStructure.USART_WordLength = USART_WordLength_8b;USART_InitStructure.USART_StopBits = USART_StopBits_1;USART_InitStructure.USART_Parity = USART_Parity_No;USART_InitStructure.USART_HardwareFlowControl =USART_HardwareFlowControl_None;USART_InitStructure.USART_Mode = USART_Mode_Tx|USART_Mode_Rx; USART_Init(USART2, &USART_InitStructure);GPIO_PinRemapConfig(GPIO_Remap_USART2,ENABLE);USART_Cmd(USART2, ENABLE);void USART2_SendData(unsigned char SendData) /防卡函数while(USART_GetFlagStatus(USART2, USART_FLAG_TXE) = RESET);/检测上次发送是否完成；USART_SendData(USART2, SendData);/Delayms(3);/-/void GPIO_Configuration(void) /各个模块GPIO初始化GPIO_InitTypeDef GPIO_InitStructure; GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;/配置管脚 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; /最大输出速度为50MHz GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; /通用推挽输出 GPIO_Init(GPIOE, &GPIO_InitStructure); /配置以上三句.PE3-led3 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;/配置管脚 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; /最大输出速度为50MHz GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; /复用推挽输出 GPIO_Init(GPIOD, &GPIO_InitStructure); /配置以上三句.PD5 txd GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;/配置管脚 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; /输入 GPIO_Init(GPIOD, &GPIO_InitStructure); /配置以上三句.PD6 rxdGPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7;/iic管脚：SCL and SDA GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD; GPIO_Init(GPIOB, &GPIO_InitStructure);void I2C_WriteByte(unsigned char id,unsigned char write_address,unsigned char byte)I2C_GenerateSTART(I2C1,ENABLE);/产生起始条件while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT);/等待ACKI2C_Send7bitAddress(I2C1,id,I2C_Direction_Transmitter);/向设备发送设备地址while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED);/等待ACKI2C_SendData(I2C1, write_address);/寄存器地址while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED);/等待ACKI2C_SendData(I2C1, byte);/发送数据while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED);/发送完成I2C_GenerateSTOP(I2C1, ENABLE);/产生结束信号/-/void AD_init(unsigned char id,unsigned char write_address,unsigned char byte1,unsigned char byte2)I2C_GenerateSTART(I2C1,ENABLE);/产生起始条件while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT);/等待ACKI2C_Send7bitAddress(I2C1,id,I2C_Direction_Transmitter);/向设备发送设备地址while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED);/等待ACKI2C_SendData(I2C1, write_address);/配置寄存器/寄存器地址while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED);/等待ACKI2C_SendData(I2C1, 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(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED);/发送完成I2C_SendData(I2C1, byte2);/低字节 最高转换速度while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED);/发送完成I2C_GenerateSTOP(I2C1, ENABLE);/产生结束信号/-/void I2C_ADpoint(unsigned char id,unsigned char write_address)I2C_GenerateSTART(I2C1,ENABLE);/产生起始条件while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT);/等待ACKI2C_Send7bitAddress(I2C1,id,I2C_Direction_Transmitter);/向设备发送设备地址while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED);/等待ACKI2C_SendData(I2C1, write_address);/寄存器地址while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED);I2C_GenerateSTOP(I2C1, ENABLE);/产生结束信号/-/unsigned char I2C_ReadByte(unsigned char id, unsigned char read_address) unsigned char temp; while(I2C_GetFlagStatus(I2C1, I2C_FLAG_BUSY); /等待I2C I2C_GenerateSTART(I2C1, ENABLE); /产生起始信号 while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT); /EV5 I2C_Send7bitAddress(I2C1, id, I2C_Direction_Transmitter);/发送地址 while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED); /EV6 I2C_Cmd(I2C1, ENABLE); /重新设置可以清楚EV6 I2C_SendData(I2C1, read_address); /发送读地址 while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED); /EV8 I2C_GenerateSTART(I2C1, ENABLE);/重新发送 while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT); /EV5 I2C_Send7bitAddress(I2C1, id, I2C_Direction_Receiver); /发送读地址 while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED); /EV6 I2C_AcknowledgeConfig(I2C1, DISABLE); I2C_GenerateSTOP(I2C1, ENABLE);/关闭应答和停止条件产生 while(!(I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_RECEIVED); temp = I2C_ReceiveData(I2C1); I2C_AcknowledgeConfig(I2C1, ENABLE); return temp;/-/void I2C_Read2(unsigned char id, unsigned char read_address) while(I2C_GetFlagStatus(I2C1, I2C_FLAG_BUSY); /等待I2C I2C_GenerateSTART(I2C1, ENABLE); /产生起始信号 while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT); /EV5 I2C_Send7bitAddress(I2C1, id, I2C_Direction_Transmitter);/发送地址 while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED); /EV6 I2C_Cmd(I2C1, ENABLE); /重新设置可以清楚EV6 I2C_SendData(I2C1, read_address); /发送读得地址 while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED); /EV8 I2C_GenerateSTART(I2C1, ENABLE);/重新发送 while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT); /EV5 I2C_Send7bitAddress(I2C1, id, I2C_Direction_Receiver); /发送读地址 while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED); /EV6 while(!(I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_RECEIVED); BUF1 = I2C_ReceiveData(I2C1);I2C_GenerateSTOP(I2C1, ENABLE);I2C_AcknowledgeConfig(I2C1, DISABLE);/关闭应答和停止条件产生while(!(I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_RECEIVED);BUF2 = I2C_ReceiveData(I2C1); I2C_AcknowledgeConfig(I2C1, ENABLE); /-/int valu; /-/-/void read_ADS1115() 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 delay_ms(1); I2C_ADpoint(0x90,0x00); delay_ms(2); I2C_Read2(0x91,0x00); valu=(BUF1 0x7fff)valu-=0xffff; /-/void Send_AD()float t;int t1;/-/USART2_SendData(BUF1); /USART2_SendData(BUF2); /原始16位数据/-/ USART2_SendData(valu/10000)+0x30); / USART