stm32 iic驱动ADXL345用库函数写得，以前可以的 不知道怎么就突然不行了
#include "stm32f10x_lib.h"
#include "i2c_ee.h"
u8 set_buffer[7]={0x0B,0x0B,0x08,0x80,0x00,0x00,0x00}; ////adxl345设置参数
u8 reg_buffer[7]={0x31,0x2c,0x2d,0x2e,0x1e,0x1f,0x20};
u8 ry_buffer[6]; //adxl345接受的数据
u8 NUM_ADXL =6;
u8 adxl_n=0;
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 USART_Configuration(void);
void delay(u32 count);
/*******************************************************************************
*******************************************************************************/
int main(void)
{
#ifdef DEBUG
debug();
#endif
RCC_Configuration();
NVIC_Configuration();
GPIO_Configuration();
USART_Configuration();
My_IIC_Init();
delay(0xFFFFF); //上电延时
/******** ADXL345设备的配置启动************/
I2C_ByteWrite(adxl345_id,set_buffer+0, reg_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
I2C_ByteWrite(adxl345_id,set_buffer+1, reg_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 ）
I2C_ByteWrite(adxl345_id,set_buffer+2, reg_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
I2C_ByteWrite(adxl345_id,set_buffer+3, reg_buffer[3]);//只使能DATA_READY中断
I2C_ByteWrite(adxl345_id,set_buffer+4, reg_buffer[4]);//X 偏移量
I2C_ByteWrite(adxl345_id,set_buffer+5, reg_buffer[5]);//Y 偏移量
I2C_ByteWrite(adxl345_id,set_buffer+6, reg_buffer[6]);//Z 偏移量
I2C_BufferRead(adxl345_id,0x00,1,devid);
while (1)
{
I2C_BufferRead(adxl345_id,0x32,6,ry_buffer); // ADXL345读出的数据保存
while(NUM_ADXL--) //ADXL
{
USART_SendData( USART1,ry_buffer[adxl_n++] );
while(USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET);
}
NUM_ADXL=6; adxl_n=0;
}
}
/*******************************************************************************
* 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 | RCC_APB2Periph_GPIOC, ENABLE);/* GPIOB and GPIOC Periph clock enable */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C1 | RCC_APB1Periph_I2C2 , ENABLE); /* I2C1 Periph clock enable */
/* Enable GPIOD and AFIO clocks */
//RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE); /* Enable USART2 clocks */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_AFIO, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
}
/*******************************************************************************
* Function Name : NVIC_Configuration
* Description : Configures Vector Table base location.
*******************************************************************************/
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
* Description : Configures the different system clocks.
*******************************************************************************/
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_PinRemapConfig(GPIO_Remap_USART2, DISABLE);/* Enable the USART2 Pins Software Remapping */
/* Configure USART2 RTS (PD.04) and USART2 Tx (PD.05) as alternate function push-pull */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; //| GPIO_Pin_5;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOA, &GPIO_InitStructure);
/* Configure USART2 CTS (PD.03) and USART2 Rx (PD.06) as input floating */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; //| GPIO_Pin_6;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOA, &GPIO_InitStructure);
}
/*******************************************************************************
* Function Name : USART_Configuration
*******************************************************************************/
void USART_Configuration(void)
{
USART_InitTypeDef USART_InitStructure;
USART_InitStructure.USART_BaudRate = 9600;
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_HardwareFlowControl_RTS_CTS;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART_InitStructure.USART_Clock = USART_Clock_Disable;
USART_InitStructure.USART_CPOL = USART_CPOL_Low;
USART_InitStructure.USART_CPHA = USART_CPHA_2Edge;
USART_InitStructure.USART_LastBit = USART_LastBit_Disable;
USART_Init(USART1, &USART_InitStructure);
USART_Cmd(USART1, ENABLE); /* Enable the USART2 */
}
/***************************************************/
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
* Output : None
* Return : None
*******************************************************************************/
#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 OF
下面是.C文件
#include "i2c_ee.h"
/*******************************************************************************
* 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 I2C_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 I2C_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
}
}
这不行可能是I2C内部硬件不行，但是后来用IO口写得也突然不行了额：
穿了一下附件，请大家指教一下啊~~都弄快20天了 |
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