/*
** ===================================================================
** Method : Accel_SendBlock (component InternalI2C)
** Description :
** When working as a MASTER, this method writes one (7-bit
** addressing) or two (10-bit addressing) slave address bytes
** inclusive of R/W bit = 0 to the I2C bus and then writes the
** block of characters to the bus. The slave address must be
** specified before, by the "SelectSlave" or "SlaveSelect10"
** method or in component initialization section, "Target slave
** address init" property. If interrupt service is enabled and
** the method returns ERR_OK, it doesn't mean that transmission
** was successful. The state of transmission is detectable by
** means of events (OnTransmitData, OnError or OnArbitLost).
** Data to be send is not copied to an internal buffer and
** remains in the original location. Therefore the content of
** the buffer should not be changed until the transmission is
** complete. Event OnTransmitData can be used to detect the end
** of the transmission.
** When working as a SLAVE, this method writes a block of
** characters to the internal output slave buffer and then,
** after the master starts the communication, to the I2C bus.
** If no character is ready for a transmission (internal output
** slave buffer is empty), the "Empty character" will be sent
** (see "Empty character" property). In SLAVE mode the data are
** copied to an internal buffer, if specified by "Output buffer
** size" property.
** Parameters :
** NAME - DESCRIPTION
** * Ptr - Pointer to the block of data to send.
** Siz - Size of the block.
** * Snt - Amount of data sent (moved to a buffer).
** In master mode, if interrupt support is
** enabled, the parameter always returns the
** same value as the parameter 'Siz' of this
** method.
** Returns :
** --- - Error code, possible codes:
** ERR_OK - OK
** ERR_SPEED - This device does not work in
** the active speed mode
** ERR_DISABLED - Device is disabled
** ERR_BUSY - The slave device is busy, it
** does not respond by the acknowledge (only
** in master mode and when interrupt service
** is disabled)
** ERR_BUSOFF - Clock timeout elapsed or
** device cannot transmit data
** ERR_TXFULL - Transmitter is full. Some data
** has not been sent. (slave mode only)
** ERR_ARBITR - Arbitration lost (only when
** interrupt service is disabled and in master
** mode)
** ===================================================================
*/
byte Accel_SendBlock(void *Ptr,word Siz,word *Snt)
{
LDD_TError Error;
LDD_I2C_TErrorMask ErrorMask;
word TmpSnt = 0x00U;
word Tr;
if (Siz == 0U) { /* Test variable Size on zero */
*Snt = 0U;
return ERR_OK; /* If zero then OK */
}
Error = IntI2cLdd1_MasterSendBlock(IntI2cLdd1_DeviceDataPtr, (LDD_TData *)Ptr, (LDD_I2C_TSize)Siz, LDD_I2C_NO_SEND_STOP); /* Send one data byte */
if (Error == ERR_BUSY) {
return ERR_BUSOFF;
}
for (Tr=0U; Tr<0x2710U; Tr++) {
IntI2cLdd1_Main(IntI2cLdd1_DeviceDataPtr); /* Call main communication method */
if (IntI2cLdd1_MasterGetBlockSentStatus(IntI2cLdd1_DeviceDataPtr)) { /* Are all a data transmitted? */
break;
}
if (TmpSnt != (word)IntI2cLdd1_MasterGetSentDataNum(IntI2cLdd1_DeviceDataPtr)) { /* Is a data byte sent? */
Tr = (word)-1; /* Clear trials */
TmpSnt = (word)IntI2cLdd1_MasterGetSentDataNum(IntI2cLdd1_DeviceDataPtr); /* Set TmpSnt on a new value */
}
}
*Snt = (word)IntI2cLdd1_MasterGetSentDataNum(IntI2cLdd1_DeviceDataPtr); /* Return sent data number */
(void)IntI2cLdd1_GetError(IntI2cLdd1_DeviceDataPtr, &ErrorMask);
if (ErrorMask != 0U) { /* Is any error detected after transfer? */
if ((ErrorMask & LDD_I2C_MASTER_NACK) != 0U) { /* If yes, decode error and return error code */
return ERR_BUSY;
} else if ((ErrorMask & LDD_I2C_ARBIT_LOST) != 0U) {
return ERR_ARBITR;
}
}
if (Tr == 0x2710U) { /* Is Tr == 'Polling trials'? */
return ERR_BUSOFF; /* Return with error */
}
return ERR_OK; /* Return ERR_OK */
}
/*
** ===================================================================
** Method : CI2C1_GetCharsInTxBuf (component InternalI2C)
** Description :
** Returns number of characters in the output buffer. In SLAVE
** mode returns the number of characters in the internal slave
** output buffer. In MASTER mode returns number of characters
** to be sent from the user buffer (passed by SendBlock method).
** This method is not supported in polling mode.
** Parameters : None
** Returns :
** --- - Number of characters in the output buffer.
** ===================================================================
*/
word CI2C1_GetCharsInTxBuf(void)
{
return (word)(OutLenM - IntI2cLdd1_MasterGetSentDataNum(IntI2cLdd1_DeviceDataPtr)); /* Return number of chars remaining in the Master Tx buffer */
}