/*
** ===================================================================
** Method : I2C1_SendChar (bean 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 one character (byte) to the bus. The slave address
** must be specified before, by the "SelectSlave" or
** "SelectSlave10" method or in the bean 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 obtainable from
** (OnTransmitData, OnError or OnArbitLost) events.
** When working as a SLAVE, this method writes a character
** to the internal output slave buffer and, 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).
** Parameters :
** NAME - DESCRIPTION
** Chr - Character to send.
** 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 an 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 (slave
** mode only)
** ERR_ARBITR - Arbitration lost (only when
** interrupt service is disabled and in
** master mode)
** ===================================================================
*/
unsigned char I2C1_SendChar(unsigned char Chr)
{
if((IBSR_IBB)||(InpLenM)||(I2C1_SerFlag&(CHAR_IN_TX|WAIT_RX_CHAR|BUSY))) { /* Is the bus busy */
return ERR_BUSOFF; /* If yes then error */
}
ChrTemp = Chr; /* Save character */
return (I2C1_SendBlock(&ChrTemp, (unsigned short)1, (unsigned short*)&I2C1_SndRcvTemp)); /* Send character and return */
}
void I2C_OnTxChar(void) {
/* request to send a character, this is a read from the memory */
word nof;
uint8_t data;
dbgF(I2C_DEBUG_TxChar);
if (memDevice.addr<sizeof(memDevice.u)) {
data = memDevice.u.mem[memDevice.addr];
memDevice.addr++; /* increment address counter */
} else {
data = 0xFF; /* undefined data */
}
(void)I2C1_SendBlock(&data, 1, &nof);
}
void I2C_SendCmd(void) {
if (sendCmd) {
#if PL_HAS_UI
word snt;
char buf[32];
#if PL_HAS_RUNNER
buf[0] = '@';
buf[1] = '\0';
RUNNER_GetCmdString(buf, sizeof(buf));
#else
SLIDER_GetCmdString(buf, sizeof(buf));
#endif
(void)I2C1_SendBlock(buf, sizeof(buf), &snt);
#endif /* PL_HAS_UI */
sendCmd = FALSE;
}
}
void I2C_OnReadReq(void) {
/* called by a master 'read' request on the bus */
/* Write[@]+ACK
* addr+ACK
* Read[@]+ACK <<= we are here!
* data at mem[addr] << Send this data
*/
word nof;
uint8_t data;
dbgF(I2C_DEBUG_ReadReq);
if (memDevice.addr<sizeof(memDevice.u)) {
data = memDevice.u.mem[memDevice.addr];
memDevice.addr++; /* increment address counter */
} else {
data = 0xFF; /* undefined byte */
}
(void)I2C1_SendBlock(&data, 1, &nof);
}