请香版主跟哪位用过STR912的同仁指点一下
代码如下：
/*********************************************************************
函数名：EEPROM_I2CInit()
*********************************************************************/
void EE_I2CInit(void)
{
I2C_InitTypeDef I2C_Struct;
/* Peripherals enable */
SCU_APBPeriphClockConfig(__I2C1,ENABLE);
I2C_DeInit(I2C1);
/* I2C0 Configuration */
I2C_Struct.I2C_GeneralCall = I2C_GeneralCall_Disable;
I2C_Struct.I2C_Ack = I2C_Ack_Enable;
I2C_Struct.I2C_CLKSpeed = 400000;
I2C_Struct.I2C_OwnAddress = 0xA0;
I2C_Init(I2C1, &I2C_Struct);
//I2C_AcknowledgeConfig(I2C1,ENABLE);
/* Enable I2C0, I2C1 */
I2C_Cmd(I2C1, ENABLE);
}
/*********************************************************************
*函数名：EE_WriteOneByte()
*功能描述：向E2的指定地址写入一个字节的数据
*********************************************************************/
void EE_WriteOneByte(u16 adr,u8 dat)
{
u8 addresstemp=0;
//I2C_AcknowledgePolling();
GPIO_WriteBit(GPIO0,GPIO_Pin_4,Bit_RESET);
addresstemp=adr>>8;
addresstemp=(((addresstemp&0x07)<<1)&0xfe)|0xa0;
I2C_GenerateStart(I2C1, ENABLE);
/* Test on EV5 and clear it */
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));
/* Send RTC address for write */
I2C_Send7bitAddress(I2C1, addresstemp, I2C_MODE_TRANSMITTER);
/* Test on EV6 and clear it */
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECTED));
I2C_Cmd(I2C1, ENABLE);
I2C_SendData(I2C1,(u8)adr);
/* Test on EV8 and clear it */
while(! I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
I2C_SendData(I2C1,dat);
/* Test on EV8 and clear it */
while(! I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
I2C_GenerateSTOP(I2C1,ENABLE);
}
/*********************************************************************
函数名：EE_WriteOneByte()
功能描述：向E2的随机地址读出一个字节的数据
*********************************************************************/
u8 EE_ReadOneByte(u16 adr)
{
unsigned char addresstemp=0;
unsigned char result = 0;
//I2C_AcknowledgePolling();
GPIO_WriteBit(GPIO0,GPIO_Pin_4,Bit_SET);
addresstemp=adr>>8;
addresstemp=(((addresstemp&0x07)<<1)&0xfe)|0xa0;
I2C_GenerateStart(I2C1,ENABLE);
/* Test on EV5 and clear it */
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));
/* Send RTC address for write */
I2C_Send7bitAddress(I2C1, addresstemp, I2C_MODE_TRANSMITTER);
/* Test on EV6 and clear it */
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECTED));
I2C_Cmd(I2C1, ENABLE);
I2C_SendData(I2C1, ( u8)adr);
/* Test on EV8 and clear it */
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
I2C_GenerateStart(I2C1,ENABLE);
/* Test on EV5 and clear it */
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));
/* Send RTC address for read */
I2C_Send7bitAddress(I2C1, addresstemp, I2C_MODE_RECEIVER);
/* Test on EV6 and clear it */
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECTED));
I2C_Cmd(I2C1, ENABLE);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_RECEIVED));
result = I2C_ReceiveData(I2C1);
__nop();
//I2C_AcknowledgeConfig(I2C1, DISABLE);
I2C_GenerateSTOP(I2C1,ENABLE);
return result;
}
在主程序中：
只要我读取24C16中的一个随机地址的数据后，单片机就不能再对24C16进行读或者写操作了
每当我读取数据后，看到i2c的SR1寄存器的值为0x9A，其中第四位为BUSY被置1了，
可能就是这个原因导致我下面不能正常读写了
我每次读的子程序后面都会有一个 I2C_stop()执行，怎么还会有BUSY呢
香版主指点一下，谢谢 期待您的回复 |
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