Posted on March 21, 2013 at 20:49Can anybody help explaint why when as the Master on the i2c, when i send out the slave address for a read request, i get 2 consecutive 9 cycle clock bursts before I try to do the Read. Basically i am loosing the first 2 data bytes being transmitted because they were not asked for yet. As soon as I start to execute case 14 below is when i get the bursts. I am in doing in that line of code is checking the status of the address send.
Code segment:
case 11:
I2C_GenerateSTART(I2C1, ENABLE);
++i_state;
break;
case 12:
while(!I2C_GetFlagStatus(I2C1, I2C_FLAG_SB))
{
StartBit_flag++;
}
&sharpifdef EAP_DEBUG
printf(''StartBit_flag = %d\n'', StartBit_flag);
StartBit_flag = 0;
&sharpendif
++i_state;
break;
case 13:
I2C_Send7bitAddress(I2C1, RTC_I2C_ADDRESS , I2C_Direction_Receiver);
++i_state;
break;
case 14:
if(I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED))
{
++i_state;
}
else
{
Busy_flag++;
printf(''Busy flag case 14 = %d\n'', Busy_flag );
break;
}
printf(''Send_address success\n'');
++i_state;
break;
#i2c
