本帖最后由 EWB5 于 2012-3-6 20:40 编辑
下面是主程序main和一个自己编改的程序i2c__ee.c(包括.h文件)：
#include "stm32f10x_lib.h"
#include "i2c_ee.h"
u8 set1_buffer[7]={0x0B,0x0B,0x08,0x80,0x00,0x00,0x00}; ////adxl345设置参数
u8 reg1_buffer[7]={0x31,0x2c,0x2d,0x2e,0x1e,0x1f,0x20};
u8 set2_buffer[5]={0x80,0x07,0x1E,0x00,0x00}; ////mpu3050设置参数
u8 reg2_buffer[5]={0x3E,0x15,0x16,0x17,0x3E};
u8 rx1_buffer[6]; //adxl345接受的数据
u8 rx2_buffer[8]; //mpu3050接受的数据
u8 devid[1]; //描述硬件ID代码
ErrorStatus HSEStartUpStatus;
void RCC_Configuration(void);
void NVIC_Configuration(void);
void GPIO_Configuration(void);
void delay(u32 count);
/*******************************************************************************
*******************************************************************************/
void main(void)
{
delay(0xFFFFF); //上电延时
#ifdef DEBUG
debug();
#endif
RCC_Configuration();
NVIC_Configuration();
GPIO_Configuration();
My_IIC_Init();
/******** ADXL345设备的配置启动************/
I2C2_ByteWrite(adxl345_id,set1_buffer+0, reg1_buffer[0]);//数据格式控制,禁用自测力，中断高电平有效，全分辨率模式（正负16g，13 bit），右对齐并带符号扩展
I2C2_ByteWrite(adxl345_id,set1_buffer+1, reg1_buffer[1]);//非低功耗模式，器件带宽为12.5Hz，输出数据速率为25Hz；（默认带宽50，速率100 ）
I2C2_ByteWrite(adxl345_id,set1_buffer+2, reg1_buffer[2]);//静止功能和活动功能同时打开，禁止自动切换至休眠模式，测量模式，不休眠
I2C2_ByteWrite(adxl345_id,set1_buffer+3, reg1_buffer[3]);//只使能DATA_READY中断
I2C2_ByteWrite(adxl345_id,set1_buffer+4, reg1_buffer[4]);//X 偏移量
I2C2_ByteWrite(adxl345_id,set1_buffer+5, reg1_buffer[5]);//Y 偏移量
I2C2_ByteWrite(adxl345_id,set1_buffer+6, reg1_buffer[6]);//Z 偏移量
/******** MPU3050设备的配置启动************/
I2C2_ByteWrite(mpu3050_id,set2_buffer+0, reg2_buffer[0] );
I2C2_ByteWrite(mpu3050_id,set2_buffer+1, reg2_buffer[1] );
I2C2_ByteWrite(mpu3050_id,set2_buffer+2, reg2_buffer[2] );
I2C2_ByteWrite(mpu3050_id,set2_buffer+3, reg2_buffer[3] );
I2C2_ByteWrite(mpu3050_id,set2_buffer+4, reg2_buffer[4] );
/******** ADXL345读出的数据为0xE5,表示正确 ************/
I2C2_BufferRead(adxl345_id,0x00,1,devid);
if( *devid==0xE5 )
{ GPIO_SetBits(GPIOC, GPIO_Pin_6); }
/***************** 数据存储************************/
I2C2_BufferRead(adxl345_id,0x32,6,rx1_buffer); GPIO_SetBits(GPIOC, GPIO_Pin_7); delay(0xfffff);// ADXL345读出的数据保存
I2C2_BufferRead(mpu3050_id,0x1B,8,rx2_buffer); GPIO_SetBits(GPIOC, GPIO_Pin_8); delay(0xfffff);// MPU3050读出的数据保存
while (1)
{
GPIO_SetBits(GPIOC, GPIO_Pin_9);
}
}
/*******************************************************************************
* Function Name : RCC_Configuration
* Description : Configures the different system clocks.
*******************************************************************************/
void RCC_Configuration(void)
{
RCC_DeInit(); /* RCC system reset(for debug purpose) */
RCC_HSEConfig(RCC_HSE_ON); /* Enable HSE */
HSEStartUpStatus = RCC_WaitForHSEStartUp(); /* Wait till HSE is ready */
if(HSEStartUpStatus == SUCCESS)
{
FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);/* Enable Prefetch Buffer */
FLASH_SetLatency(FLASH_Latency_2);/* Flash 2 wait state */
RCC_HCLKConfig(RCC_SYSCLK_Div1); /* HCLK = SYSCLK */
RCC_PCLK2Config(RCC_HCLK_Div1); /* PCLK2 = HCLK */
RCC_PCLK1Config(RCC_HCLK_Div2); /* PCLK1 = HCLK/2 */
RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9); /* PLLCLK = 8MHz * 9 = 72 MHz */
RCC_PLLCmd(ENABLE); /* Enable PLL */
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET)/* Wait till PLL is ready */
{ }
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK); /* Select PLL as system clock source */
while(RCC_GetSYSCLKSource() != 0x08)/* Wait till PLL is used as system clock source */
{ }
}
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB , ENABLE);/* GPIOB and GPIOC Periph clock enable */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC , ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C1 | RCC_APB1Periph_I2C2 , ENABLE);
}
/*******************************************************************************
* Function Name : NVIC_Configuration
*******************************************************************************/
void NVIC_Configuration(void)
{
#ifdef VECT_TAB_RAM
NVIC_SetVectorTable(NVIC_VectTab_RAM, 0x0); /* Set the Vector Table base location at 0x20000000 */
#else
NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0); /* VECT_TAB_FLASH Set the Vector Table base location at 0x08000000 */
#endif
}
/*******************************************************************************
* Function Name : GPIO_Configuration
*******************************************************************************/
void GPIO_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10 | GPIO_Pin_11;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD;
GPIO_Init(GPIOB, &GPIO_InitStructure); /* Configure PB.10, PC.11 as SCL & SDA */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7 | GPIO_Pin_8 | GPIO_Pin_9;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOC, &GPIO_InitStructure); /* Configure PC.06, PC.07, PC.08 and PC.09 as Output push-pull */
}
/***************************************************/
void delay(u32 count)
{
for(; count != 0; count--);
}
/*******************************************************************************
* Function Name : assert_failed
* Description : Reports the name of the source file and the source line number
* where the assert_param error has occurred.
* Input : - file: pointer to the source file name
* - line: assert_param error line source number
*******************************************************************************/
#ifdef DEBUG
void assert_failed(u8* file, u32 line)
{
/* User can add his own implementation to report the file name and line number,
ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
/* Infinite loop */
while (1)
{
}
}
#endif
/*********** (C) COPYRIGHT 2007 STMicroelectronics *****END OFF LILE****/
接下来是i2c_ee.c的内容：
#include "i2c_ee.h"
extern void delay(u32 count);
extern u8 rx1_buffer[6]; //adxl345接受的数据
extern u8 rx2_buffer[6]; //mpu3050接受的数据
/*******************************************************************************
* Function Name : My_IIC_Init
* Description : Initializes peripherals used by the I2C EEPROM driver.
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void My_IIC_Init()
{
I2C_InitTypeDef I2C_InitStructure;
I2C_SoftwareResetCmd(I2C2,ENABLE);
I2C_SoftwareResetCmd(I2C2,DISABLE);
I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;
I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2;
I2C_InitStructure.I2C_OwnAddress1 = 0x30 ; //////////// I2C地址为 0x30
I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;
I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
I2C_InitStructure.I2C_ClockSpeed = 10000;
I2C_Cmd(I2C2, ENABLE);
I2C_AcknowledgeConfig(I2C2, ENABLE);
I2C_Init(I2C2, &I2C_InitStructure);
}
/*******************************************************************************
* Function Name : I2C2_ByteWrite
*******************************************************************************/
void I2C2_ByteWrite(u8 slave_id,u8* pBuffer, u8 WriteAddr) //原数据地址指针，slave器件内部地址，slave器件ID
{
I2C_GenerateSTART(I2C2, ENABLE); //delay(0x1ff); //// Send STRAT condition ////
while( !I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_MODE_SELECT) ); /* Test on EV5 and clear it 起始位已经发送 */
I2C_Send7bitAddress(I2C2, slave_id, I2C_Direction_Transmitter); // delay(0x1ff); ////Send 0xA6 for connect ////
while( !I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED) ); /* Test on EV6 and clear it 地址已发送 */
I2C_SendData(I2C2, WriteAddr); //delay(0x1ff); //// Send the reg_buffer to write to ////
while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED)); /* Test on EV8 and clear it 发送缓冲区空 */
I2C_SendData(I2C2, *pBuffer);// delay(0x1ff); //// Send the set_buffer to be written ////
while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED)); /* Test on EV8 and clear it 发送缓冲区空 （即发完了）*/
I2C_GenerateSTOP(I2C2, ENABLE); //// Send STOP condition ////
}
/*******************************************************************************
* Function Name : I2C2_BufferRead
* Input : - pBuffer : pointer to the buffer that receives the data read from the reg.
* - ReadAddr : EEPROM's internal address to read from.
* - NumByteToRead : number of bytes to read from the EEPROM.
*******************************************************************************/
void I2C2_BufferRead(u8 slave_id,u8 ReadAddr, u16 NumByteToRead,u8* pBuffer)
{
I2C_GenerateSTART(I2C2, ENABLE); ////Send START condition ////
while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_MODE_SELECT)); /* Test on EV5 and clear it 起始位已经发送 */
if( NumByteToRead==1 ) /*In the case of a single data transfer disable ACK before reading the data */
{ I2C_AcknowledgeConfig(I2C2, DISABLE); }
else
{ I2C_AcknowledgeConfig(I2C2, ENABLE); }
I2C_Send7bitAddress(I2C2,slave_id,I2C_Direction_Transmitter); //// Send 0xA6 for connect ////
// I2C2->DR = 0xA7;
while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED)); /* Test on EV6 and clear it 地址已发送或地址匹配 */
// I2C_Cmd(I2C1, ENABLE); /* Clear EV6 by setting again the PE bit */
I2C_SendData(I2C2,ReadAddr); //// Send the ADXL reg_address to write to ////
while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED)); /* Test on EV8 and clear it 发送缓冲区空*/
I2C_GenerateSTART(I2C2, ENABLE); //// Send STRAT condition again////
while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_MODE_SELECT)); /* Test on EV5 and clear it 起始位已经发送*/
I2C_Send7bitAddress(I2C2, slave_id, I2C_Direction_Receiver); //// Send 0xA7 for connect ////
while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED)); /* Test on EV6 and clear it 地址已发送 */
while(NumByteToRead)
{
if(I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_RECEIVED)) /* Test on EV7 and clear it接受缓冲区非空（即有接受数据） */
{
*pBuffer = I2C_ReceiveData(I2C2);
if( NumByteToRead == 2 ) ////这是倒数二个数据
{ I2C_AcknowledgeConfig(I2C2, DISABLE); } /* Disable Acknowledgement */
if( NumByteToRead == 1 ) ////这是最后一个数据
{ I2C_GenerateSTOP(I2C2, ENABLE); } /* Send STOP Condition */
pBuffer++;
NumByteToRead--;
} //// end if
}
}
/******************* (C) COPYRIGHT 2007 STMicroelectronics *****END OF FILE****/
之所以没有分别用I2C1和I2C2分别驱动两个传感器是因为开发板上的I2C1的PB6、PB7接了温度传感器，而且单独驱动其中一个时也是只能用I2C2，我怀疑是温度传感器影响了我买的两个传感器模块的工作，但是现在两个并接在I2C2上不正常是不是也是这个问题呢，他们之间相互干扰？？？？
最下面是.h文件：
#ifndef __I2C_EE_H
#define __I2C_EE_H
#include "stm32f10x_lib.h"
#define adxl345_id 0xA6
#define mpu3050_id 0x00
void My_IIC_Init(void);
void I2C2_ByteWrite(u8 slave_id,u8* pBuffer, u8 WriteAddr);
void I2C2_BufferRead(u8 slave_id,u8 ReadAddr, u16 NumByteToRead,u8* pBuffer);
#endif |
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