我用一个IIC读取EEPROM的实验例程改了下，用做与LIS3LV02DQ的芯片进行通信，结果怎么调也弄不来，恳请大家帮看看程序。
i2c_ee.h文件
#include "stm32f10x.h"
/* Exported types ------------------------------------------------------------*/
/* Exported constants --------------------------------------------------------*/
/* Use the defines below the choose the EEPROM type */
//#define EE_M24C08 /* Support the device: M24C08. */
/* note: Could support: M24C01, M24C02, M24C04 and M24C16 if the blocks and
HW address are correctly defined*/
//#define EE_M24C64_32 /* Support the devices: M24C32 and M24C64 */
#define EE_24LC02 /* STM32F103ZE-EK开发板缺省配置的芯片是24LC02 */
/* Defines for the GPIO pins used for the I2C communication */
#define I2C_EE I2C1
#define I2C_EE_CLK RCC_APB1Periph_I2C1
#define I2C_EE_GPIO GPIOB
#define I2C_EE_GPIO_CLK RCC_APB2Periph_GPIOB
#define I2C_EE_SCL GPIO_Pin_6
#define I2C_EE_SDA GPIO_Pin_7
#ifdef EE_M24C64_32
/* For M24C32 and M24C64 devices, E0,E1 and E2 pins are all used for device
address selection (ne need for additional address lines). According to the
Harware connection on the board (on STM3210C-EVAL board E0 = E1 = E2 = 0) */
#define EEPROM_HW_ADDRESS 0x1D /* E0 = E1 = E2 = 0 */
#define I2C_Speed 200000
#define I2C_SLAVE_ADDRESS7 0x1D
#define I2C_FLASH_PAGESIZE 32
#elif defined (EE_M24C08)
/* The M24C08W contains 4 blocks (128byte each) with the adresses below: E2 = 0
EEPROM Addresses defines */
#define EEPROM_Block0_ADDRESS 0x1D /* E2 = 0 */
#define I2C_Speed 200000
#define I2C_SLAVE_ADDRESS7 0x1D
#define I2C_FLASH_PAGESIZE 16
#elif defined (EE_24LC02)
/* The M24C08W contains 4 blocks (128byte each) with the adresses below: E2 = 0
EEPROM Addresses defines */
#define EEPROM_Block0_ADDRESS 0x1D /* E2 = 0 */
#define I2C_Speed 200000
#define I2C_SLAVE_ADDRESS7 0x1D
#define I2C_FLASH_PAGESIZE 8
#endif /* EE_M24C64_32 */
/* Exported macro ------------------------------------------------------------*/
/* Exported functions ------------------------------------------------------- */
void I2C_EE_Init(void);
void I2C_EE_ByteWrite(uint8_t i2c_data, uint8_t WriteAddr);
void I2C_EE_PageWrite(uint8_t* pBuffer, uint16_t WriteAddr, uint8_t NumByteToWrite);
void I2C_EE_BufferWrite(uint8_t* pBuffer, uint16_t WriteAddr, uint16_t NumByteToWrite);
uint8_t I2C_EE_BufferRead(uint8_t ReadAddr,uint8_t NumByteToRead);
void I2C_EE_WaitEepromStandbyState(void);
#endif /* __I2C_EE_H */
i2c_ee.c文件
#include "i2c_ee.h"
/** @addtogroup STM32F10x_StdPeriph_Examples
* @{
*/
/** @addtogroup I2C_EEPROM
* @{
*/
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
uint8_t EEPROM_ADDRESS = 0x1D;
/* Private function prototypes -----------------------------------------------*/
void GPIO_Configuration(void);
void I2C_Configuration(void);
/* Private functions ---------------------------------------------------------*/
/**
* @brief Configure the used I/O ports pin
* @param None
* @retval None
*/
void GPIO_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
/* Configure I2C_EE pins: SCL and SDA */
GPIO_InitStructure.GPIO_Pin = I2C_EE_SCL | I2C_EE_SDA;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD;
GPIO_Init(I2C_EE_GPIO, &GPIO_InitStructure);
}
/**
* @brief I2C Configuration
* @param None
* @retval None
*/
void I2C_Configuration(void)
{
I2C_InitTypeDef I2C_InitStructure;
/* I2C configuration */
I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;
I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2;
I2C_InitStructure.I2C_OwnAddress1 = I2C_SLAVE_ADDRESS7;
I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;
I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
I2C_InitStructure.I2C_ClockSpeed = I2C_Speed;
/* I2C Peripheral Enable */
I2C_Cmd(I2C_EE, ENABLE);
/* Apply I2C configuration after enabling it */
I2C_Init(I2C_EE, &I2C_InitStructure);
}
/**
* @brief Initializes peripherals used by the I2C EEPROM driver.
* @param None
* @retval None
*/
void I2C_EE_Init()
{
/* I2C Periph clock enable */
RCC_APB1PeriphClockCmd(I2C_EE_CLK, ENABLE);
/* GPIO Periph clock enable */
RCC_APB2PeriphClockCmd(I2C_EE_GPIO_CLK, ENABLE);
/* GPIO configuration */
GPIO_Configuration();
/* I2C configuration */
I2C_Configuration();
}
/**
* @brief Writes one byte to the I2C EEPROM.
* @param pBuffer : pointer to the buffer containing the data to be
* written to the EEPROM.
* @param WriteAddr : EEPROM's internal address to write to.
zhgmdh2009
* @retval None
*/
void I2C_EE_ByteWrite(uint8_t i2c_data, uint8_t WriteAddr)
{
/* Send STRAT condition */
I2C_GenerateSTART(I2C_EE, ENABLE);
/* Test on EV5 and clear it */
while(!I2C_CheckEvent(I2C_EE, I2C_EVENT_MASTER_MODE_SELECT));
/* Send EEPROM address for write */
I2C_Send7bitAddress(I2C_EE, EEPROM_ADDRESS, I2C_Direction_Transmitter);
/* Test on EV6 and clear it */
while(!I2C_CheckEvent(I2C_EE, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));
I2C_SendData(I2C_EE, WriteAddr);
/* Test on EV8 and clear it */
while(!I2C_CheckEvent(I2C_EE, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
/* Send the byte to be written */
I2C_SendData(I2C_EE, i2c_data);
/* Test on EV8 and clear it */
while(!I2C_CheckEvent(I2C_EE, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
/* Send STOP condition */
I2C_GenerateSTOP(I2C_EE, ENABLE);
}
/**
* @brief Reads a block of data from the EEPROM.
* @param pBuffer : pointer to the buffer that receives the data read
* from the EEPROM.
* @param ReadAddr : EEPROM's internal address to read from.
* @param NumByteToRead : number of bytes to read from the EEPROM.
* @retval None
*/
uint8_t I2C_EE_BufferRead(uint8_t ReadAddr,uint8_t NumByteToRead)
{
uint8_t I2CData;
/* While the bus is busy */
while(I2C_GetFlagStatus(I2C_EE, I2C_FLAG_BUSY));
/* Send START condition */
I2C_GenerateSTART(I2C_EE, ENABLE);
/* Test on EV5 and clear it */
while(!I2C_CheckEvent(I2C_EE, I2C_EVENT_MASTER_MODE_SELECT));
/* Send EEPROM address for write */
I2C_Send7bitAddress(I2C_EE, EEPROM_ADDRESS, I2C_Direction_Transmitter);
/* Test on EV6 and clear it */
while(!I2C_CheckEvent(I2C_EE, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));
/* Clear EV6 by setting again the PE bit */
I2C_Cmd(I2C_EE, ENABLE);
/* Send the EEPROM's internal address to read from: Only one byte address */
I2C_SendData(I2C_EE, ReadAddr);
/* Test on EV8 and clear it */
while(!I2C_CheckEvent(I2C_EE, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
/* Send STRAT condition a second time */
I2C_GenerateSTART(I2C_EE, ENABLE);
/* Test on EV5 and clear it */
while(!I2C_CheckEvent(I2C_EE, I2C_EVENT_MASTER_MODE_SELECT));
/* Send EEPROM address for read */
I2C_Send7bitAddress(I2C_EE, EEPROM_ADDRESS, I2C_Direction_Receiver);
/* Test on EV6 and clear it */
while(!I2C_CheckEvent(I2C_EE, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED));
/* While there is data to be read */
while(NumByteToRead)
{
if(NumByteToRead == 1)
{
/* Disable Acknowledgement */
I2C_AcknowledgeConfig(I2C_EE, DISABLE);
/* Send STOP Condition */
I2C_GenerateSTOP(I2C_EE, ENABLE);
}
/* Test on EV7 and clear it */
if(I2C_CheckEvent(I2C_EE, I2C_EVENT_MASTER_BYTE_RECEIVED))
{
/* Read a byte from the EEPROM */
I2CData = I2C_ReceiveData(I2C_EE);
/* Point to the next location where the byte read will be saved */
/* Decrement the read bytes counter */
NumByteToRead--;
}
}
/* Enable Acknowledgement to be ready for another reception */
I2C_AcknowledgeConfig(I2C_EE, ENABLE);
return I2CData;
}
}} |
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