英飞凌磁传感器 TLE5012b STM32F103 SPI 程序说明

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1.硬件：

A. 英飞凌磁传感器 TLE5012bE1000

B. STM32F103

C. 磁铁，请用“径向充磁”的圆磁铁，如直径 10 x 厚 2mm，找TB买

2.TLE5012B_E1000 接线说明:

1:NC
2:SCK <= 120R => stm32f103 PA5
3:CSQ (CS) <= 120R => stm32f103 PB0
4:DATA <= 120R => stm32f103 PA6
DATA <= 120R => stm32f103 PA7
DATA <= 2.2K => Vdd 3.3V
PS:因是三线 SPI , MOSI , MISO 并线使用

5:NC
6:Vdd 3.3V
7:GND
8:NC

3.源码说明：

A. 初始化 SPI5012B_Init();

B. 得到 0~359 角度 ReadAngle() 或角速度 ReadSpeed()

void SPI5012B_Init(void){SPI_InitTypeDef  SPI_InitStructure;GPIO_InitTypeDef GPIO_InitStructure;RCC_APB2PeriphClockCmd( RCC_APB2Periph_SPI1,ENABLE );//以下二句，在它处声明，请增加使用RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOB|RCC_APB2Periph_AFIO,ENABLE);GPIO_PinRemapConfig(GPIO_Remap_SWJ_Disable,ENABLE);//使JTDO、JTDI、JTCK 当成普通IO口进行操作//GPIOB0 当成普通IO口进行操作/*SPI: NSS,SCK,MISO and MOSI */GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;//PA5--CLK--复用推挽GPIO_Init(GPIOA, &GPIO_InitStructure);//GPIO_StructInit(&GPIO_InitStructure);/* Configure PA6 as encoder input */GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD;//PA6--MISO--输入GPIO_Init(GPIOA, &GPIO_InitStructure);/* PA7*/GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7;GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;//PA7--MOSI--推挽输出GPIO_Init(GPIOA, &GPIO_InitStructure);GPIO_InitStructure.GPIO_Pin = GPIO_CS_Pin_Name;//PB0--CS--推挽输出GPIO_Init(GPIO_CS_Pin_Type, &GPIO_InitStructure);/**********SPI****************/SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;//SPI1--双线全双工！！SPI_InitStructure.SPI_Mode = SPI_Mode_Master;SPI_InitStructure.SPI_DataSize = SPI_DataSize_16b;SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low;SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge;SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_8;SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;SPI_InitStructure.SPI_CRCPolynomial = 7;SPI_Init(SPI1, &SPI_InitStructure);SPI_Cmd(SPI1, ENABLE);}

uint16_t SPIx_ReadWriteByte(uint16_t byte){uint16_t retry = 0;while( (SPI1->SR&1<<1) == 0 )//发送缓冲区非空{if( ++retry > 200 )return 0;//延迟一段时间后返回}SPI1->DR = byte;     //发送数据retry = 0;while( (SPI1->SR&1<<0) == 0 ) //接收缓冲区为空{if( ++retry > 200 )return 0;//延迟一段时间后返回}return SPI1->DR;          //读一下缓冲区，清标志}//得到 0~359 度uint16_t ReadAngle(void){return ( ReadValue(READ_ANGLE_VALUE) * 360 / 0x10000 );}//得到角速度uint16_t ReadSpeed(void){return ReadValue(READ_SPEED_VALUE);}uint16_t ReadValue(uint16_t u16RegValue){uint16_t u16Data;SPI_CS_ENABLE;SPIx_ReadWriteByte(u16RegValue);  SPI_TX_OFF;//发送 0xFFFF 是无用的，可能是为了有时钟u16Data = ( SPIx_ReadWriteByte(0xffff) & 0x7FFF ) << 1;//0x12/0xff*100kSPI_CS_DISABLE;  SPI_TX_ON;return(u16Data);}

/**  ******************************************************************************  * @file    spi_TLE5012B.h   * @author  Keith Cheung  * @version V3.5.0  * @date    13-MAY-2017  * @brief   This file contains the headers of the spi_TLE5012B.  ******************************************************************************  * @attention  *  *  * <h2><center>&copy; COPYRIGHT 2017</center></h2>  ******************************************************************************  */#ifndef _TLE5012B_H_#define _TLE5012B_H_#include "stm32f10x.h"//SPI5012B_Init() 时钟需另外加上//以下内容需按实际更改#define SPI_TX_OFF {GPIOA->CRL&=0x0FFFFFFF;GPIOA->CRL|=0x40000000;}//把PA7（MOSI）配置成开漏--输入模式#define SPI_TX_ON  {GPIOA->CRL&=0x0FFFFFFF;GPIOA->CRL|=0xB0000000;}//把PA7（MOSI）配置成推挽--输出模式（50MHz）#define GPIO_CS_Pin_Name  GPIO_Pin_0#define GPIO_CS_Pin_Type  GPIOB//以下内容一般不需变动#define SPI_CS_ENABLE  GPIO_ResetBits(GPIO_CS_Pin_Type, GPIO_CS_Pin_Name)       //片选脚电平拉低#define SPI_CS_DISABLE GPIO_SetBits(GPIO_CS_Pin_Type, GPIO_CS_Pin_Name)         //片选脚电平拉高//#define INDEX_ENABLE   GPIO_SetBits(GPIOA, GPIO_Pin_4)/* for incremental signal index *///#define CLK_H GPIO_SetBits(GPIOA, GPIO_Pin_5)                 //时钟脚PA5电平拉高//#define CLK_L GPIO_ResetBits(GPIOA, GPIO_Pin_5)               //时钟脚PA5电平拉低//#define DATA_HGPIO_SetBits(GPIOA, GPIO_Pin_6)                         //PA6（MISO）电平拉高//#define DATA_LGPIO_ResetBits(GPIOA, GPIO_Pin_6)                       //PA6（MISO）电平拉低//#define READ_DATAGPIO_ReadInputDataBit(GPIOA,GPIO_Pin_6)/* SPI command for TLE5012 */#define READ_STATUS0x8001//8000#define READ_ANGLE_VALUE0x8021//8020#define READ_SPEED_VALUE0x8031//8030#define WRITE_MOD1_VALUE0x5060//0_1010_0_000110_0001#define MOD1_VALUE0x0001#define WRITE_MOD2_VALUE0x5080//0_1010_0_001000_0001#define MOD2_VALUE0x0801#define WRITE_MOD3_VALUE0x5091//0_1010_0_001001_0001#define MOD3_VALUE0x0000#define WRITE_MOD4_VALUE0x50E0//0_1010_0_001110_0001#define MOD4_VALUE0x0098//9bit 512#define WRITE_IFAB_VALUE0x50B1#define IFAB_VALUE 0x000D/* Functionality mode */#define REFERESH_ANGLE0void SPI5012B_Init(void);void SPI_SendData16(uint16_t SendData);uint16_t SPI_ReadData16(void);uint16_t ReadAngle(void);uint16_t ReadSpeed(void);uint16_t ReadValue(uint16_t u16Value);uint16_t SPIx_ReadWriteByte(uint16_t byte);uint16_t TlE5012W_Reg(uint16_t Reg_CMD, uint16_t Reg_Data);#endif

4. 源码下载：http://download.csdn.net/detail/keith_cheung/9841694

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