STM8L I2C EEPROM燒寫問題

Tim-2041843

我使用硬體I2C去做24C32燒寫
正在測試I2C READ BYTE跟WRITE BYTE時發現了一些問題如下,
I2C READ如果加上回傳會出現讀出來的數據錯誤
 
WRITE程式如下
void I2C_EE_ByteWrite(uint8_t pBuffer,uint16_t WriteAddr)
{
  uint8_t at24C02_to_16_addr;
 
 
 while(I2C_GetFlagStatus(I2C1,I2C_FLAG_BUSY));
 
 I2C_GenerateSTART(I2C1,ENABLE);
 
 while(I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_MODE_SELECT));
 
 #ifdef AT24C32_64 
 
 I2C_Send7bitAddress(I2C1,(uint8_t)EEPROM_ADDRESS,I2C_Direction_Transmitter);//EEPROM_ADDRESS
 
 while(I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));
 
 I2C_SendData(I2C1,(uint8_t)((WriteAddr&0xFF00)>>8));  //MSB
 
 while(I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_BYTE_TRANSMITTING)); // TXOK?
 
 I2C_SendData(I2C1,(uint8_t)(WriteAddr&0x00FF));     //LSB
 
 #else //AT24C02 to 16
 
 at24C02_to_16_addr=(uint8_t)((WriteAddr&0x0E00)>>7);
 
 I2C_Send7bitAddress(I2C1,EEPROM_ADDRESS|at24C02_to_16_addr,I2C_Direction_Transmitter);//EEPROM_ADDRESS &MSB
 
 while(I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));
 
 I2C_SendData(I2C1,(uint8_t)(WriteAddr&0x00FF));     //LSB
 
 #endif
 
 while(I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_BYTE_TRANSMITTING)); // TXOK?
 
 I2C_SendData(I2C1,pBuffer);
 
 while(I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_BYTE_TRANSMITTED)); // TXOK?
 
 I2C_GenerateSTOP(I2C1,ENABLE);
 
 delay(EEPROM_DLY);
}
 
READ如下
uint8_t I2C_EE_ByteRead(uint16_t WriteAddr)
{
 uint8_t at24C02_to_16_addr,read_data;
 while(I2C_GetFlagStatus(I2C1,I2C_FLAG_BUSY));
 
 I2C_GenerateSTART(I2C1,ENABLE);
 
 while(I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_MODE_SELECT));
 
 #ifdef AT24C32_64
 
 I2C_Send7bitAddress(I2C1,(uint8_t)EEPROM_ADDRESS,I2C_Direction_Transmitter);//EEPROM_ADDRESS
 
 while(I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));
 
 I2C_ClearFlag(I2C1,I2C_FLAG_ADDR);
 
 I2C_SendData(I2C1,(uint8_t)((WriteAddr&0xFF00)>>8));  //MSB
 
 while(I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_BYTE_TRANSMITTING)); // TXOK?
 
 I2C_SendData(I2C1,(uint8_t)(WriteAddr&0x00FF));     //LSB
 
 while(I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_BYTE_TRANSMITTING)); // TXOK?
 
 I2C_GenerateSTART(I2C1,ENABLE);
 
 while (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));
 
 I2C_Send7bitAddress(I2C1,(uint8_t)EEPROM_ADDRESS,I2C_Direction_Receiver); //RECEIVER
 
 
 #else
 
 at24C02_to_16_addr=(uint8_t)((WriteAddr>>7)&0x0E);
 at24C02_to_16_addr=at24C02_to_16_addr|EEPROM_ADDRESS;
 
 I2C_Send7bitAddress(I2C1,at24C02_to_16_addr,I2C_Direction_Transmitter);//EEPROM_ADDRESS &MSB
 
 while(I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));
 
 I2C_SendData(I2C1,(uint8_t)(WriteAddr));     //LSB
 
 while(I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_BYTE_TRANSMITTING)); // TXOK?
 
 I2C_GenerateSTART(I2C1,ENABLE);
 
 while (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));
 
 I2C_Send7bitAddress(I2C1,(uint8_t)at24C02_to_16_addr,I2C_Direction_Receiver); //RECEIVER
 
 #endif
 
 while (!I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED));  //RX FLAG
 
 read_data=I2C_ReceiveData(I2C1);
 
 I2C_AcknowledgeConfig(I2C1,ENABLE); //NONE ACK
 
 I2C_GenerateSTOP(I2C1,ENABLE);
 
 //return read_data;
}
拿掉return read_data;收下的資料居然正確,加上RETURN會不正確
麻煩幫小弟看一下,謝謝

Tim-2041843

 
 
很怪的問題,都沒人想挑戰看看?

安

仿真一下在return以前， read_data的值是多少，return以后 read_data的值是多少。

Tim-2041843

回复第 3 楼 于2013-10-29 08:59:42发表:
仿真一下在return以前， read_data的值是多少，return以后 read_data的值是多少。
 
 

RETURN之前,read_data就錯了,數據是161,拿掉return read_data;讀到的資料都是正確的

狼

你的函数定义的是void型，所以不能加返回值

mxj1005071012

void I2C_EE_ByteWrite(uint8_t pBuffer,uint16_t WriteAddr)
注意到你这个函数的返回值是VOID  应该没有返回值的

Tim-2041843

回复第 5 楼 于2013-10-29 12:48:07发表:
你的函数定义的是void型，所以不能加返回值
 
 

那是write,抱歉我沒加上分格線所以導致漏看,read function下面

Tim-2041843

回复第 6 楼 于2013-10-29 14:36:40发表:
void I2C_EE_ByteWrite(uint8_t pBuffer,uint16_t WriteAddr)
注意到你这个函数的返回值是VOID  应该没有返回值的
 
 

READ如下
uint8_t I2C_EE_ByteRead(uint16_t WriteAddr)
您看到write,write byte沒有返傳
謝謝回覆...希望問題能獲得解決

安

应该和return没有关系，你看一下I2C_ReceiveData返回的值的类型。

Tim-2041843

回复第 9 楼 于2013-10-29 16:19:27发表:
应该和return没有关系，你看一下I2C_ReceiveData返回的值的类型。
 
 

同型,都是uint8_t
謝謝回覆