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本帖最后由 ljlucker 于 2014-1-18 09:41 编辑
有ISO例程或者《STM32库开发实战指南》的朋友可以一起来看一下。我在运行自己写的程序或者例程时都会出现一个奇怪的现象。
程序有点长,看过书或者看过例程的朋友主要看重点就可以了,以下是例程:
#include "stm32f10x_conf.h"
#include "stdio.h"
#define EEPROM_Block0_ADDRESS 0xA0;
#define I2C1_OWN_ADDRESS7 0x0A
#define EEP_Fristpage 0x00
#define I2C_Speed 400000
#define I2C_PageSize 8
uint16_t EEPORM_ADDRESS;
u8 I2C_Buf_Write[256];
u8 I2C_Buf_Read[256];
static void I2C_GPIO_Config(void)//端口配置,这不是重点,可以跳过
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C1,ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD;
GPIO_Init(GPIOB, &GPIO_InitStructure);
}
static void I2C_Mode_Configu(void)//配置I2C,这也不是重点,可以跳过
{
I2C_InitTypeDef I2C_InitStructure;
I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;
I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2;
I2C_InitStructure.I2C_OwnAddress1 =I2C1_OWN_ADDRESS7;
I2C_InitStructure.I2C_Ack = I2C_Ack_Enable ;
I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
I2C_InitStructure.I2C_ClockSpeed = I2C_Speed;
I2C_Init(I2C1, &I2C_InitStructure);
I2C_Cmd(I2C1, ENABLE);
}
void I2C_EE_Init(void)//I2C初始化,不是问题重点
{
I2C_GPIO_Config();
I2C_Mode_Configu();
}
void I2C_EE_ByteWrite(u8* pBuffer, u8 WriteAddr)
{
I2C_GenerateSTART(I2C1, ENABLE);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));
I2C_Send7bitAddress(I2C1,EEPORM_ADDRESS, I2C_Direction_Transmitter);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));
I2C_SendData(I2C1, WriteAddr);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
I2C_SendData(I2C1, *pBuffer);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
I2C_GenerateSTOP(I2C1, ENABLE);
}
void I2C_EE_PageWrite(u8* pBuffer, u8 WriteAddr, u8 NumByteToWrite)//写一页数据,问题在这个程序中
{
while(I2C_GetFlagStatus(I2C1, I2C_FLAG_BUSY));
I2C_GenerateSTART(I2C1, ENABLE);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));
I2C_Send7bitAddress(I2C1,EEPORM_ADDRESS, I2C_Direction_Transmitter);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED)); //仿真时,程序一直停在这里执行不下去
I2C_SendData(I2C1, WriteAddr);
while(! I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
while(NumByteToWrite--)
{
I2C_SendData(I2C1, *pBuffer);
pBuffer++;
while (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
}
I2C_GenerateSTOP(I2C1, ENABLE);
}
void I2C_EE_WaitEepromStandbyState(void) //这段程序没问题
{
vu16 SR1_Tmp = 0;
do
{
I2C_GenerateSTART(I2C1, ENABLE);
SR1_Tmp = I2C_ReadRegister(I2C1, I2C_Register_SR1);
I2C_Send7bitAddress(I2C1,EEPORM_ADDRESS, I2C_Direction_Transmitter);
}
while(!(I2C_ReadRegister(I2C1, I2C_Register_SR1) & 0x0002));
I2C_ClearFlag(I2C1, I2C_FLAG_AF);
I2C_GenerateSTOP(I2C1, ENABLE);
}
//这段程序执行不下去的原因是因为里面调用了void I2C_EE_PageWrite(u8* pBuffer, u8 WriteAddr, u8 NumByteToWrite)程序。
void I2C_EE_BufferWrite(u8* pBuffer, u8 WriteAddr, u16 NumByteToWrite)
{
u8 NumOfPage = 0, NumOfSingle = 0, Addr = 0, count = 0;
Addr = WriteAddr % I2C_PageSize;
count = I2C_PageSize - Addr;
NumOfPage = NumByteToWrite / I2C_PageSize;
NumOfSingle = NumByteToWrite % I2C_PageSize;
if(Addr == 0)
{
if(NumOfPage == 0)
{
I2C_EE_PageWrite(pBuffer, WriteAddr, NumOfSingle);
I2C_EE_WaitEepromStandbyState();
}
else
{
while(NumOfPage--)
{
I2C_EE_PageWrite(pBuffer, WriteAddr, I2C_PageSize);
I2C_EE_WaitEepromStandbyState();
WriteAddr += I2C_PageSize;
pBuffer += I2C_PageSize;
}
if(NumOfSingle!=0)
{
I2C_EE_PageWrite(pBuffer, WriteAddr, NumOfSingle);
I2C_EE_WaitEepromStandbyState();
}
}
}
else
{
if(NumOfPage== 0)
{
I2C_EE_PageWrite(pBuffer, WriteAddr, NumOfSingle);
I2C_EE_WaitEepromStandbyState();
}
else
{
NumByteToWrite -= count;
NumOfPage = NumByteToWrite / I2C_PageSize;
NumOfSingle = NumByteToWrite % I2C_PageSize;
if(count != 0)
{
I2C_EE_PageWrite(pBuffer, WriteAddr, count);
I2C_EE_WaitEepromStandbyState();
WriteAddr += count;
pBuffer += count;
}
while(NumOfPage--)
{
I2C_EE_PageWrite(pBuffer, WriteAddr, I2C_PageSize);
I2C_EE_WaitEepromStandbyState();
WriteAddr += I2C_PageSize;
pBuffer += I2C_PageSize;
}
if(NumOfSingle != 0)
{
I2C_EE_PageWrite(pBuffer, WriteAddr, NumOfSingle);
I2C_EE_WaitEepromStandbyState();
}
}
}
}
void I2C_EE_BufferRead(u8* pBuffer, u8 ReadAddr, u16 NumByteToRead)
{
while(I2C_GetFlagStatus(I2C1, I2C_FLAG_BUSY));
I2C_GenerateSTART(I2C1, ENABLE);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));
I2C_Send7bitAddress(I2C1,EEPORM_ADDRESS, I2C_Direction_Transmitter);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));
I2C_Cmd(I2C1, ENABLE);
I2C_SendData(I2C1, ReadAddr);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
I2C_GenerateSTART(I2C1, ENABLE);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));
I2C_Send7bitAddress(I2C1,EEPORM_ADDRESS, I2C_Direction_Receiver);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED));
while(NumByteToRead)
{
if(NumByteToRead == 1)
{
I2C_AcknowledgeConfig(I2C1, DISABLE);
I2C_GenerateSTOP(I2C1, ENABLE);
}
if(I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_RECEIVED))
{
*pBuffer = I2C_ReceiveData(I2C1);
pBuffer++;
NumByteToRead--;
}
}
I2C_AcknowledgeConfig(I2C1, ENABLE);
}
void I2C_Test(void)
{
u16 i;
printf("写入数据\n\r");
for ( i=0; i<=255; i++ )
{
I2C_Buf_Write = i;
printf("0x%02X ", I2C_Buf_Write);
if(i%16 == 15)
printf("\n\r");
}
I2C_EE_BufferWrite( I2C_Buf_Write,EEP_Fristpage, 256);
printf("\n\r读出数据\n\r");
I2C_EE_BufferRead(I2C_Buf_Read,EEP_Fristpage, 256);
for (i=0; i<256; i++)
{
if(I2C_Buf_Read != I2C_Buf_Write)
{
printf("0x%02X ", I2C_Buf_Read);
printf("错误:I2C EEPROMD写入与读出的数据不一样\n\r");
return;
}
printf("0x%02X ", I2C_Buf_Read);
if(i%16 == 15) printf("\n\r");
}
printf("I2C(AT24C02)测试成功\n\r");
}
哪位高手可以帮忙看一下吗,万能的管理员,我现在很迷惘找不出问题所在,能不能知道我一下。我会很感谢你的。
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