while (NumByteToRead)
{
if (NumByteToRead != 3) /* Receive bytes from first byte until byte N-3 */
{
while ((I2C_GetLastEvent(I2C1) & 0x00004) != 0x000004); /* Poll on BTF */
/* Read data */
*pBuffer = I2C_ReceiveData(I2C1);
pBuffer++;
/* Decrement the read bytes counter */
NumByteToRead--;
}
if (NumByteToRead == 3) /* it remains to read three data: data N-2, data N-1, Data N */
{
/* Data N-2 in DR and data N -1 in shift register */
while ((I2C_GetLastEvent(I2C1) & 0x000004) != 0x0000004); /* Poll on BTF */
/* Clear ACK */
I2C_AcknowledgeConfig(I2C1, DISABLE);
__disable_irq();
/* Read Data N-2 */
*pBuffer = I2C_ReceiveData(I2C1);
pBuffer++;
/* Program the STOP */
I2C_GenerateSTOP(I2C1, ENABLE);
/* Read DataN-1 */
*pBuffer = I2C_ReceiveData(I2C1);
__enable_irq();
pBuffer++;
while ((I2C_GetLastEvent(I2C1) & 0x00000040) != 0x0000040); /* Poll on RxNE */
/* Read DataN */
*pBuffer = I2C1->DR;
/* Reset the number of bytes to be read by master */
NumByteToRead = 0;
}
}
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