LIS3DH驱动和相关资料

/******************** (C) COPYRIGHT 2012 STMicroelectronics ******************** * File Name : LIS3DH_driver.c * Author : MSH Application Team * Author : Fabio Tota * Version : $Revision:$ * Date : $Date:$ * Description : LIS3DH driver file * * HISTORY: * Date | Modification | Author * 24/06/2011 | Initial Revision | Fabio Tota * 11/06/2012 | Support for multiple drivers in the same program | Abhishek Anand ******************************************************************************** * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME. * AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT, * INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE * CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING * INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS. * * THIS SOFTWARE IS SPECIFICALLY DESIGNED FOR EXCLUSIVE USE WITH ST PARTS. * *******************************************************************************/ /* Includes ------------------------------------------------------------------*/ #include "lis3dh_driver.h" #include "delay.h" #include "usart.h" /* Private typedef -----------------------------------------------------------*/ /* Private define ------------------------------------------------------------*/ /* Private macro -------------------------------------------------------------*/ /* Private variables ---------------------------------------------------------*/ /* Private function prototypes -----------------------------------------------*/ //int main(void) //{ // delay_init(); //延时函数初始化 // uart_init(115200); //串口初始化为115200 // IIC2_Init(); // delay_ms(100); // while(1) // { // LIS3DH_Data_Init(); // delay_ms(1000); // } // //} //OLED初始化IIC void IIC2_Init(void) { GPIO_InitTypeDef GPIO_InitStructure; RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOB, ENABLE ); //使能GPIOB时钟 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10|GPIO_Pin_11; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP ; //推挽输出 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIOB, &GPIO_InitStructure); GPIO_SetBits(GPIOB,GPIO_Pin_10|GPIO_Pin_11); //PB6,PB7 输出高 } void LIS3DH_Data_Init() { //uint8_t buffer[26]; AxesRaw_t data; uint8_t lisid,response; uint8_t lisidtemp; //set ODR (turn ON device) LIS3DH_SetODR(LIS3DH_ODR_100Hz); //set PowerMode LIS3DH_SetMode(LIS3DH_NORMAL); //set Fullscale LIS3DH_SetFullScale(LIS3DH_FULLSCALE_2); //set axis Enable LIS3DH_SetAxis(LIS3DH_X_ENABLE | LIS3DH_Y_ENABLE | LIS3DH_Z_ENABLE); // Read ID LIS3DH_GetWHO_AM_I(&lisidtemp); lisid=(uint16_t)lisidtemp; printf("LIS3DH ID: %x \r\n",lisid); //get Acceleration Raw data response=LIS3DH_GetAccAxesRaw(&data); //print data values delay_us(10); if(response==1) { printf("传感器原始值:x=%d, y=%d, z=%d\r\n", data.AXIS_X, data.AXIS_Y, data.AXIS_Z); printf( "处理后的加速度值Accel:[x]%dmg,[y]%dmg,[z]%dmg\r\n", (int16_t)((float)data.AXIS_X*4/65536*1000), (int16_t)((float)data.AXIS_Y*4/65536*1000), (int16_t)((float)data.AXIS_Z*4/65536*1000)); } } //产生IIC起始信号 void IIC2_Start(void) { // IIC2_SDA_OUT(); //sda线输出 IIC2_SDA=1; // delay_us(10); IIC2_SCL=1; // delay_us(10); IIC2_SDA=0;//START:when CLK is high,DATA change form high to low delay_us(10); IIC2_SCL=0;//钳住I2C总线，准备发送或接收数据 } //产生IIC停止信号 void IIC2_Stop(void) { // IIC2_SDA_OUT();//sda线输出 IIC2_SCL=0; // delay_us(10); IIC2_SDA=0;//STOP:when CLK is high DATA change form low to high delay_us(10); IIC2_SCL=1; // delay_us(10); IIC2_SDA=1;//发送I2C总线结束信号 delay_us(10); } //等待应答信号到来 //返回值：1，接收应答失败 // 0，接收应答成功 uint8_t IIC2_Wait_Ack(void) { uint8_t ucErrTime=0; // IIC2_SDA_IN(); //SDA设置为输入 IIC2_SDA=1; delay_us(6); IIC2_SCL=1; delay_us(6); while(IIC2_READ_SDA) { ucErrTime++; if(ucErrTime>250) { IIC2_Stop(); return 1; } } IIC2_SCL=0;//时钟输出0 return 0; } //产生ACK应答 void IIC2_Ack(void) { IIC2_SCL=0; // IIC2_SDA_OUT(); IIC2_SDA=0; delay_us(10); IIC2_SCL=1; delay_us(10); IIC2_SCL=0; } //不产生ACK应答 void IIC2_NAck(void) { IIC2_SCL=0; // IIC2_SDA_OUT(); IIC2_SDA=1; delay_us(10); IIC2_SCL=1; delay_us(10); IIC2_SCL=0; } //IIC发送一个字节,WRITE //返回从机有无应答 //1，有应答 //0，无应答 void IIC2_Send_Byte(uint8_t txd) { uint8_t t; // IIC2_SDA_OUT(); IIC2_SCL=0;//拉低时钟开始数据传输 for(t=0;t<8;t++) { if((txd&0x80)>>7) { IIC2_SDA=1; } else { IIC2_SDA=0; } txd <<= 1; delay_us(10); IIC2_SCL=1; delay_us(10); IIC2_SCL=0; delay_us(10); } } //读1个字节，ack=1时，发送ACK，ack=0，发送nACK u8 IIC2_Read_Byte(unsigned char ack) { unsigned char i,receive=0; // IIC2_SDA_IN();//SDA设置为输入 for(i=0;i<8;i++ ) { IIC2_SCL=0; delay_us(10); IIC2_SCL=1; receive<<=1; if(IIC2_READ_SDA)receive++; delay_us(5); } if (!ack) IIC2_NAck();//发送nACK else IIC2_Ack(); //发送ACK return receive; } //在LIS3DH里面的指定地址开始读一字节数据 //ReadAddr :读出的地址 //返回值 :读出的数据 uint8_t LIS3DH_ReadOneByte(uint16_t ReadAddr) { uint8_t temp=0; IIC2_Start(); IIC2_Send_Byte(0X30); //发送写命令 IIC2_Wait_Ack(); IIC2_Send_Byte(ReadAddr); //发送读地址 IIC2_Wait_Ack(); IIC2_Start(); IIC2_Send_Byte(0X31); //发送读命令，进入接收模式 IIC2_Wait_Ack(); temp=IIC2_Read_Byte(0); IIC2_Stop(); //产生一个停止条件 return temp; } //在LIS3DH指定地址写入一个数据 //WriteAddr :写入数据的目的地址 //DataToWrite:要写入的数据 void LIS3DH_WriteOneByte(uint16_t WriteAddr,uint8_t DataToWrite) { IIC2_Start(); IIC2_Send_Byte(0X30); //发送写命令 IIC2_Wait_Ack(); IIC2_Send_Byte(WriteAddr); //发送地址 IIC2_Wait_Ack(); IIC2_Send_Byte(DataToWrite); //发送字节 IIC2_Wait_Ack(); IIC2_Stop();//产生一个停止条件 delay_us(10); } //在AT24CXX里面的指定地址开始写入长度为Len的数据 //该函数用于写入16bit或者32bit的数据. //WriteAddr :开始写入的地址 //DataToWrite:数据数组首地址 //Len :要写入数据的长度2,4 void LIS3DH_WriteLenByte(uint16_t WriteAddr,uint32_t DataToWrite,uint8_t Len) { uint8_t t; for(t=0;t<Len;t++) { LIS3DH_WriteOneByte(WriteAddr+t,(DataToWrite>>(8*t))&0xff); } } //在AT24CXX里面的指定地址开始读出长度为Len的数据 //该函数用于读出16bit或者32bit的数据. //ReadAddr :开始读出的地址 //返回值 :数据 //Len :要读出数据的长度2,4 uint32_t LIS3DH_ReadLenByte(uint16_t ReadAddr,uint8_t Len) { uint8_t t; uint32_t temp=0; for(t=0;t<Len;t++) { temp<<=8; temp+=LIS3DH_ReadOneByte(ReadAddr+Len-t-1); } return temp; } /******************************************************************************* * Function Name : LIS3DH_ReadReg * Description : Generic Reading function. It must be fullfilled with either * : I2C or SPI reading functions * Input : Register Address * Output : Data REad * Return : None *******************************************************************************/ uint8_t LIS3DH_ReadReg(uint8_t Reg,