本帖最后由 PrimoQin 于 2013-4-6 18:32 编辑
向E2PROM的三个地址连续写入三个数据，第一个地址的数据能成功写入，第二个、第三个数据却不能写入，请问这是什么原因。
单独写一个数据是能正常写入的，为何后面的却写入不了，请高手指点，帮忙找找问题所在.
程序如下：
void I2C_Init(void)
{
/* Reset I2C0 */
SYS->IPRSTC2.I2C_RST = 1;
SYS->IPRSTC2.I2C_RST = 0;
SYS->P3_MFP.MFP4_T0_SDA = 0; //P3.4/P3.5 为I2C模式
SYS->P3_MFP.MFP5_T1_SCL = 0;
SYS->P3_MFP.ALT4_T0_SDA = 1;
SYS->P3_MFP.ALT5_T1_SCL = 1;
SYSCLK->APBCLK.I2C_EN = 1;
I2C->I2CLK = 40;
I2C->I2CON.ENS1 = 1;
}
void I2C_Open(void)
{
SYSCLK->APBCLK.I2C_EN = 1;
I2C->I2CON.ENS1 = 1;
}
void I2C_Close(void)
{
SYSCLK->APBCLK.I2C_EN = 0;
I2C->I2CON.ENS1 = 0;
}
void I2C_SET_CONTROL_BIT(uint8_t STA,uint8_t STO,uint8_t SI,uint8_t AA)
{
I2C->I2CON.STA = STA;
I2C->I2CON.STO = STO;
I2C->I2CON.SI = SI;
I2C->I2CON.AA = AA;
}
void 24C64_Write(uint8_t DeviceAddr,uint16_t REG_Address,uint8_t DATA)
{
I2C_Open();
I2C_SET_CONTROL_BIT(1,0,0,0); //set STA
while(I2C->I2CON.SI == 0);
I2C->I2CDAT = DeviceAddr;
I2C_SET_CONTROL_BIT(0,0,1,0);
while(I2C->I2CON.SI == 0);
I2C->I2CDAT = (REG_Address>>8);
I2C_SET_CONTROL_BIT(0,0,1,0);
while(I2C->I2CON.SI == 0);
I2C->I2CDAT = REG_Address;
I2C_SET_CONTROL_BIT(0,0,1,0);
while(I2C->I2CON.SI == 0);
I2C->I2CDAT = DATA;
I2C_SET_CONTROL_BIT(0,0,1,0);
while(I2C->I2CON.SI == 0);
I2C_SET_CONTROL_BIT(0,1,1,0);
I2C_Close();
}
uint8_t 24C64_Read(uint8_t DeviceAddr,uint32_t REG_Address)
{
uint8_t TEMP;
I2C_Open();
I2C_SET_CONTROL_BIT(1,0,0,0);
while(I2C->I2CON.SI == 0);
I2C->I2CDAT = DeviceAddr;
I2C_SET_CONTROL_BIT(0,0,1,0);
while(I2C->I2CON.SI == 0);
I2C->I2CDAT = (REG_Address>>8) & 0xff;
I2C_SET_CONTROL_BIT(0,0,1,0);
while(I2C->I2CON.SI == 0);
I2C->I2CDAT = REG_Address & 0xff;
I2C_SET_CONTROL_BIT(0,0,1,0);
while(I2C->I2CON.SI == 0);
I2C_SET_CONTROL_BIT(1,0,1,0);
while(I2C->I2CON.SI == 0);
I2C->I2CDAT = DeviceAddr+0x01;
I2C_SET_CONTROL_BIT(0,0,1,0);
while(I2C->I2CON.SI == 0);
I2C->I2CDAT = 0x00;
I2C_SET_CONTROL_BIT(0,0,1,1);
while(I2C->I2CON.SI == 0);
TEMP = I2C->I2CDAT;
I2C_SET_CONTROL_BIT(0,1,1,0);
I2C_Close();
return(TEMP);
}
主程序：
main()
{
uint8_t DATA_temp;
UNLOCKREG();
//SelectClk_12M();
SYS_Init();
LOCKREG();
I2C_Init();
DATA_temp = 0x71;
FM24C64_Write(0xA0,0x0000,DATA_temp);
DATA_temp = 0x78;
FM24C64_Write(0xA0,0x0007,DATA_temp);
DATA_temp = 0x79;
FM24C64_Write(0xA0,0x0010,DATA_temp);
while(1)
{
DATA_temp = FM24C64_Read(0xA0,0x0000);
DISPLAY(DATA_temp);//显示读出的数据
DATA_temp = FM24C64_Read(0xA0,0x0007);
DISPLAY(DATA_temp);
DATA_temp = FM24C64_Read(0xA0,0x0010);
DISPLAY(DATA_temp);
delay(80000);
}
}
地址为0x0000的数据能正常写入，之后的0x0007/0x0010两个地址的数据却不能写入，请问这是什么原因。
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