uint_8 i2c_master_send_block (i2c_buf_t *buf, uint_8 *ptr, uint_32 length) {
/*
* this function sends a block of data out of the i2c port as master, it also ensures that a
* stop condition is sent at the end
*/
if (!length) {
return(E_OK); // nothing to do
}
if (length > I2C_BUF_MAX) {
return(E_BOUNDS);
}
if ((I2C_PDD_GetBusStatus(I2C0_BASE_PTR) == I2C_PDD_BUS_BUSY) || /* Is the bus busy? */ \
((buf->flags & MASTER_IN_PROGRES) != 0x00U) || (buf->tx_req != 0x00U)) {
return(E_BUSY);
}
//
// begin critical section
//
buf->flags |= MASTER_IN_PROGRES; /* Set flag "busy" */
memcpy(buf->tx_buf, ptr, length);
buf->rx_idx = 0;
buf->tx_idx = 0;
buf->rx_req = 0;
buf->tx_req = length; /* Set the counter of output bufer's content */
buf->sendstop = TRUE; /* Set generating stop condition */
I2C_PDD_SetTransmitMode(I2C0_BASE_PTR, I2C_PDD_TX_DIRECTION); /* Set TX mode */
if (I2C_PDD_GetMasterMode(I2C0_BASE_PTR) == I2C_PDD_MASTER_MODE) { /* Is device in master mode? */
I2C_PDD_RepeatStart(I2C0_BASE_PTR); /* If yes then repeat start cycle generated */
}
else {
I2C_PDD_SetMasterMode(I2C0_BASE_PTR, I2C_PDD_MASTER_MODE); /* If no then start signal generated */
}
if ((buf->flags & ADDR_7) != 0x00) { /* Is 7-bit addressing set ? */
buf->flags |= (ADDR_COMPLETE | REP_ADDR_COMPLETE); /* Only one byte of address will be sent 7-bit address mode*/
I2C_PDD_WriteDataReg(I2C0_BASE_PTR, buf->slave_addr_low); /* Send slave address */
}
else if ((buf->flags & ADDR_10) != 0x00) { /* Is 10-bit addressing set ? */
buf->flags &= ~(ADDR_COMPLETE | REP_ADDR_COMPLETE); /* Second byte of address will be sent later */
I2C_PDD_WriteDataReg(I2C0_BASE_PTR, buf->slave_addr_high); /* Send slave address - high byte*/
}
else if ((buf->flags & GENERAL_CALL) != 0x00) { /* Is general call command required ? */
buf->flags |= ADDR_COMPLETE; /* Only one byte of address will be sent in general call address mode*/
I2C_PDD_WriteDataReg(I2C0_BASE_PTR, 0x00); /* Send general call address */
}
//
// end critical section
//
return(E_OK);
}
/* ===================================================================*/
LDD_TError IntI2cLdd1_MasterReceiveBlock(LDD_TDeviceData *DeviceDataPtr, LDD_TData *BufferPtr, LDD_I2C_TSize Size, LDD_I2C_TSendStop SendStop)
{
IntI2cLdd1_TDeviceData *DeviceDataPrv = (IntI2cLdd1_TDeviceData *)DeviceDataPtr;
if (Size == 0x00U) { /* Test variable Size on zero */
return ERR_OK; /* If zero then OK */
}
if (SendStop == LDD_I2C_NO_SEND_STOP) { /* Test variable SendStop on supported value */
return ERR_PARAM_MODE; /* If not supported value then error */
}
if ((DeviceDataPrv->SerFlag & GENERAL_CALL) != 0x00U) { /* Is the general call flag set (SelectSlaveDevice - address type is general call) ? */
return ERR_NOTAVAIL; /* It is not possible to receive data - Call SelectSlaveDevice method */
}
if (DeviceDataPrv->SendStop == LDD_I2C_SEND_STOP) {
if ((I2C_PDD_GetBusStatus(I2C0_BASE_PTR) == I2C_PDD_BUS_BUSY) || /* Is the bus busy? */ \
((DeviceDataPrv->SerFlag & MASTER_IN_PROGRES) != 0x00U) || \
(DeviceDataPrv->InpLenM != 0x00U)) {
return ERR_BUSY; /* If yes then error */
}
} else {
if(((DeviceDataPrv->SerFlag & MASTER_IN_PROGRES) != 0x00U) || /* Is the bus busy? */ \
(DeviceDataPrv->InpLenM != 0x00U)) {
return ERR_BUSY; /* If yes then error */
}
}
/* {Default RTOS Adapter} Critical section begin, general PE function is used */
EnterCritical();
DeviceDataPrv->SerFlag |= MASTER_IN_PROGRES; /* Set flag "busy" */
DeviceDataPrv->InpPtrM = (uint8_t *)BufferPtr; /* Save pointer to data for reception */
DeviceDataPrv->InpByteMNum = 0x00U; /* Clear data number */
DeviceDataPrv->InpLenM = Size; /* Set the counter of input bufer's content */
DeviceDataPrv->SendStop = SendStop; /* Set generating stop condition */
I2C_PDD_SetTransmitMode(I2C0_BASE_PTR, I2C_PDD_TX_DIRECTION); /* Set TX mode */
if (I2C_PDD_GetMasterMode(I2C0_BASE_PTR) == I2C_PDD_MASTER_MODE) { /* Is device in master mode? */
I2C_PDD_RepeatStart(I2C0_BASE_PTR); /* If yes then repeat start cycle generated */
} else {
I2C_PDD_SetMasterMode(I2C0_BASE_PTR, I2C_PDD_MASTER_MODE); /* If no then start signal generated */
}
if ((DeviceDataPrv->SerFlag & ADDR_7) != 0x00U) { /* Is 7-bit addressing set ? */
DeviceDataPrv->SerFlag |= (ADDR_COMPLETE|REP_ADDR_COMPLETE); /* Only one byte of address will be sent 7-bit address mode*/
I2C_PDD_WriteDataReg(I2C0_BASE_PTR, (uint8_t)(DeviceDataPrv->SlaveAddr | 0x01U)); /* Send slave address */
} else {
if ((DeviceDataPrv->SerFlag & ADDR_10) != 0x00U) { /* Is 10-bit addressing set ? */
DeviceDataPrv->SerFlag &= (uint8_t)~(ADDR_COMPLETE | REP_ADDR_COMPLETE); /* Second byte of address will be sent later */
I2C_PDD_WriteDataReg(I2C0_BASE_PTR, DeviceDataPrv->SlaveAddrHigh); /* Send slave address - high byte */
}
}
/* {Default RTOS Adapter} Critical section end, general PE function is used */
ExitCritical();
return ERR_OK; /* OK */
}
/* ===================================================================*/
LDD_TError IntI2cLdd1_MasterSendBlock(LDD_TDeviceData *DeviceDataPtr, LDD_TData *BufferPtr, LDD_I2C_TSize Size, LDD_I2C_TSendStop SendStop)
{
IntI2cLdd1_TDeviceData *DeviceDataPrv = (IntI2cLdd1_TDeviceData *)DeviceDataPtr;
if (Size == 0x00U) { /* Test variable Size on zero */
return ERR_OK; /* If zero then OK */
}
if (DeviceDataPrv->SendStop == LDD_I2C_SEND_STOP) {
if ((I2C_PDD_GetBusStatus(I2C0_BASE_PTR) == I2C_PDD_BUS_BUSY) || /* Is the bus busy? */ \
((DeviceDataPrv->SerFlag & MASTER_IN_PROGRES) != 0x00U) || \
(DeviceDataPrv->OutLenM != 0x00U)) {
return ERR_BUSY; /* If yes then error */
}
} else {
if (((DeviceDataPrv->SerFlag & MASTER_IN_PROGRES) != 0x00U) || /* Is the bus busy? */ \
(DeviceDataPrv->OutLenM != 0x00U)) {
return ERR_BUSY; /* If yes then error */
}
}
/* {Default RTOS Adapter} Critical section begin, general PE function is used */
EnterCritical();
DeviceDataPrv->SerFlag |= MASTER_IN_PROGRES; /* Set flag "busy" */
DeviceDataPrv->OutPtrM = (uint8_t *)BufferPtr; /* Save pointer to data for transmitting */
DeviceDataPrv->OutByteMNum = 0x00U; /* Set data counter */
DeviceDataPrv->OutLenM = Size; /* Set the counter of output bufer's content */
DeviceDataPrv->SendStop = SendStop; /* Set generating stop condition */
I2C_PDD_SetTransmitMode(I2C0_BASE_PTR, I2C_PDD_TX_DIRECTION); /* Set TX mode */
if (I2C_PDD_GetMasterMode(I2C0_BASE_PTR) == I2C_PDD_MASTER_MODE) { /* Is device in master mode? */
I2C_PDD_RepeatStart(I2C0_BASE_PTR); /* If yes then repeat start cycle generated */
} else {
I2C_PDD_SetMasterMode(I2C0_BASE_PTR, I2C_PDD_MASTER_MODE); /* If no then start signal generated */
}
if ((DeviceDataPrv->SerFlag & ADDR_7) != 0x00U) { /* Is 7-bit addressing set ? */
DeviceDataPrv->SerFlag |= (ADDR_COMPLETE | REP_ADDR_COMPLETE); /* Only one byte of address will be sent 7-bit address mode*/
I2C_PDD_WriteDataReg(I2C0_BASE_PTR, DeviceDataPrv->SlaveAddr); /* Send slave address */
} else {
if ((DeviceDataPrv->SerFlag & ADDR_10) != 0x00U) { /* Is 10-bit addressing set ? */
DeviceDataPrv->SerFlag &= (uint8_t)~(ADDR_COMPLETE | REP_ADDR_COMPLETE); /* Second byte of address will be sent later */
I2C_PDD_WriteDataReg(I2C0_BASE_PTR, DeviceDataPrv->SlaveAddrHigh); /* Send slave address - high byte */
} else {
if ((DeviceDataPrv->SerFlag & GENERAL_CALL) != 0x00U) { /* Is general call command required ? */
DeviceDataPrv->SerFlag |= ADDR_COMPLETE; /* Only one byte of address will be sent in general call address mode*/
I2C_PDD_WriteDataReg(I2C0_BASE_PTR, 0x00U); /* Send general call address */
}
}
}
/* {Default RTOS Adapter} Critical section end, general PE function is used */
ExitCritical();
return ERR_OK; /* OK */
}
/*
** ===================================================================
** Method : Accel_SendStop (component InternalI2C)
** Description :
** If the "Automatic stop condition" property value is 'no',
** this method sends a valid stop condition to the serial data
** line of the I2C bus to terminate the communication on the
** bus after using send methods. This method is enabled only if
** "Automatic stop condition" property is set to 'no'.
** Parameters : None
** 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_BUSOFF - Clock timeout elapsed - bus is
** busy
** ===================================================================
*/
byte Accel_SendStop(void)
{
LDD_I2C_TBusState BusState;
word Tr;
(void)Accel_SerFlag; /* Suppress unused variable warning if needed */
I2C_PDD_SetMasterMode(I2C0_BASE_PTR, I2C_PDD_SLAVE_MODE); /* Switch device to slave mode (stop signal sent) */
I2C_PDD_SetTransmitMode(I2C0_BASE_PTR, I2C_PDD_RX_DIRECTION); /* Switch to Rx mode */
for(Tr=0x2710U; Tr!=0U; Tr--) {
(void)IntI2cLdd1_CheckBus(IntI2cLdd1_DeviceDataPtr, &BusState); /* Get I2C line state */
if(BusState == LDD_I2C_IDLE) { /* Bus is idle? */
return ERR_OK; /* Return without error */
}
}
return ERR_BUSOFF; /* Return with error */
}
/* ===================================================================*/
LDD_TError I2C2_MasterReceiveBlock(LDD_TDeviceData *DeviceDataPtr, LDD_TData *BufferPtr, LDD_I2C_TSize Size, LDD_I2C_TSendStop SendStop)
{
I2C2_TDeviceData *DeviceDataPrv = (I2C2_TDeviceData *)DeviceDataPtr;
if (Size == 0x00U) { /* Test variable Size on zero */
return ERR_OK; /* If zero then OK */
}
if (SendStop == LDD_I2C_NO_SEND_STOP) { /* Test variable SendStop on supported value */
return ERR_PARAM_MODE; /* If not supported value then error */
}
if (DeviceDataPrv->SendStop == LDD_I2C_SEND_STOP) {
if ((I2C_PDD_GetBusStatus(I2C0_BASE_PTR) == I2C_PDD_BUS_BUSY) || /* Is the bus busy? */ \
((DeviceDataPrv->SerFlag & MASTER_IN_PROGRES) != 0x00U) || \
(DeviceDataPrv->InpLenM != 0x00U)) {
return ERR_BUSY; /* If yes then error */
}
} else {
if(((DeviceDataPrv->SerFlag & MASTER_IN_PROGRES) != 0x00U) || /* Is the bus busy? */ \
(DeviceDataPrv->InpLenM != 0x00U)) {
return ERR_BUSY; /* If yes then error */
}
}
/* {Default RTOS Adapter} Critical section begin, general PE function is used */
EnterCritical();
DeviceDataPrv->SerFlag |= MASTER_IN_PROGRES; /* Set flag "busy" */
DeviceDataPrv->InpPtrM = (uint8_t *)BufferPtr; /* Save pointer to data for reception */
DeviceDataPrv->InpLenM = Size; /* Set the counter of input bufer's content */
DeviceDataPrv->SendStop = SendStop; /* Set generating stop condition */
I2C_PDD_SetTransmitMode(I2C0_BASE_PTR, I2C_PDD_TX_DIRECTION); /* Set TX mode */
if (I2C_PDD_GetMasterMode(I2C0_BASE_PTR) == I2C_PDD_MASTER_MODE) { /* Is device in master mode? */
I2C_PDD_RepeatStart(I2C0_BASE_PTR); /* If yes then repeat start cycle generated */
} else {
I2C_PDD_SetMasterMode(I2C0_BASE_PTR, I2C_PDD_MASTER_MODE); /* If no then start signal generated */
}
I2C_PDD_WriteDataReg(I2C0_BASE_PTR, 0x3BU); /* Send slave address */
/* {Default RTOS Adapter} Critical section end, general PE function is used */
ExitCritical();
return ERR_OK; /* OK */
}
/* ===================================================================*/
LDD_TError CI2C1_MasterSendBlock(LDD_TDeviceData *DeviceDataPtr, LDD_TData *BufferPtr, LDD_I2C_TSize Size, LDD_I2C_TSendStop SendStop)
{
CI2C1_TDeviceData *DeviceDataPrv = (CI2C1_TDeviceData *)DeviceDataPtr;
if (Size == 0x00U) { /* Test variable Size on zero */
return ERR_OK; /* If zero then OK */
}
if (DeviceDataPrv->SendStop == LDD_I2C_SEND_STOP) {
if ((I2C_PDD_GetBusStatus(I2C0_BASE_PTR) == I2C_PDD_BUS_BUSY) || /* Is the bus busy? */ \
((DeviceDataPrv->SerFlag & MASTER_IN_PROGRES) != 0x00U) || \
(DeviceDataPrv->OutLenM != 0x00U)) {
return ERR_BUSY; /* If yes then error */
}
} else {
if (((DeviceDataPrv->SerFlag & MASTER_IN_PROGRES) != 0x00U) || /* Is the bus busy? */ \
(DeviceDataPrv->OutLenM != 0x00U)) {
return ERR_BUSY; /* If yes then error */
}
}
/* {MQXLite RTOS Adapter} Critical section begin (RTOS function call is defined by MQXLite RTOS Adapter property) */
_int_disable();
DeviceDataPrv->SerFlag |= MASTER_IN_PROGRES; /* Set flag "busy" */
DeviceDataPrv->OutPtrM = (uint8_t *)BufferPtr; /* Save pointer to data for transmitting */
DeviceDataPrv->OutLenM = Size; /* Set the counter of output bufer's content */
DeviceDataPrv->SendStop = SendStop; /* Set generating stop condition */
I2C_PDD_SetTransmitMode(I2C0_BASE_PTR, I2C_PDD_TX_DIRECTION); /* Set TX mode */
if (I2C_PDD_GetMasterMode(I2C0_BASE_PTR) == I2C_PDD_MASTER_MODE) { /* Is device in master mode? */
I2C_PDD_RepeatStart(I2C0_BASE_PTR); /* If yes then repeat start cycle generated */
} else {
I2C_PDD_SetMasterMode(I2C0_BASE_PTR, I2C_PDD_MASTER_MODE); /* If no then start signal generated */
}
I2C_PDD_WriteDataReg(I2C0_BASE_PTR, 0x00U); /* Send slave address */
/* {MQXLite RTOS Adapter} Critical section ends (RTOS function call is defined by MQXLite RTOS Adapter property) */
_int_enable();
return ERR_OK; /* OK */
}
void CI2C1_Interrupt(LDD_RTOS_TISRParameter _isrParameter)
{
/* {MQXLite RTOS Adapter} ISR parameter is passed as parameter from RTOS interrupt dispatcher */
CI2C1_TDeviceDataPtr DeviceDataPrv = (CI2C1_TDeviceDataPtr)_isrParameter;
register uint8_t Status; /* Temporary variable for status register */
Status = I2C_PDD_ReadStatusReg(I2C0_BASE_PTR); /* Safe status register */
I2C_PDD_ClearInterruptFlags(I2C0_BASE_PTR, (Status)); /* Clear interrupt flag */
if (I2C_PDD_GetMasterMode(I2C0_BASE_PTR) == I2C_PDD_MASTER_MODE) { /* Is device in master mode? */
if (I2C_PDD_GetTransmitMode(I2C0_BASE_PTR) == I2C_PDD_TX_DIRECTION) { /* Is device in Tx mode? */
if ((Status & I2C_PDD_RX_ACKNOWLEDGE) != 0x00U){ /* NACK received? */
I2C_PDD_SetMasterMode(I2C0_BASE_PTR, I2C_PDD_SLAVE_MODE); /* Switch device to slave mode (stop signal sent) */
I2C_PDD_SetTransmitMode(I2C0_BASE_PTR, I2C_PDD_RX_DIRECTION); /* Switch to Rx mode */
DeviceDataPrv->OutLenM = 0x00U; /* No character for sending */
DeviceDataPrv->InpLenM = 0x00U; /* No character for reception */
DeviceDataPrv->SerFlag &= (uint8_t)~(MASTER_IN_PROGRES); /* No character for sending or reception */
} else {
if (DeviceDataPrv->OutLenM != 0x00U) { /* Is any char. for transmitting? */
DeviceDataPrv->OutLenM--; /* Decrease number of chars for the transmit */
I2C_PDD_WriteDataReg(I2C0_BASE_PTR, *(DeviceDataPrv->OutPtrM)++); /* Send character */
} else {
if (DeviceDataPrv->InpLenM != 0x00U) { /* Is any char. for reception? */
if (DeviceDataPrv->InpLenM == 0x01U) { /* If only one char to receive */
I2C_PDD_EnableTransmitAcknowledge(I2C0_BASE_PTR, PDD_DISABLE); /* then transmit ACK disable */
} else {
I2C_PDD_EnableTransmitAcknowledge(I2C0_BASE_PTR, PDD_ENABLE); /* else transmit ACK enable */
}
I2C_PDD_SetTransmitMode(I2C0_BASE_PTR, I2C_PDD_RX_DIRECTION); /* Switch to Rx mode */
(void)I2C_PDD_ReadDataReg(I2C0_BASE_PTR); /* Dummy read character */
} else {
DeviceDataPrv->SerFlag &= (uint8_t)~(MASTER_IN_PROGRES); /* Clear flag "busy" */
if (DeviceDataPrv->SendStop == LDD_I2C_SEND_STOP) {
I2C_PDD_SetMasterMode(I2C0_BASE_PTR, I2C_PDD_SLAVE_MODE); /* Switch device to slave mode (stop signal sent) */
I2C_PDD_SetTransmitMode(I2C0_BASE_PTR, I2C_PDD_RX_DIRECTION); /* Switch to Rx mode */
}
CI2C1_OnMasterBlockSent(DeviceDataPrv->UserData); /* Invoke OnMasterBlockSent event */
}
}
}
} else {
DeviceDataPrv->InpLenM--; /* Decrease number of chars for the receive */
if (DeviceDataPrv->InpLenM != 0x00U) { /* Is any char. for reception? */
if (DeviceDataPrv->InpLenM == 0x01U) {
I2C_PDD_EnableTransmitAcknowledge(I2C0_BASE_PTR, PDD_DISABLE); /* Transmit NACK */
}
} else {
DeviceDataPrv->SerFlag &= (uint8_t)~(MASTER_IN_PROGRES); /* Clear flag "busy" */
I2C_PDD_SetMasterMode(I2C0_BASE_PTR, I2C_PDD_SLAVE_MODE); /* If no, switch device to slave mode (stop signal sent) */
I2C_PDD_EnableTransmitAcknowledge(I2C0_BASE_PTR, PDD_ENABLE); /* Transmit ACK */
}
*(DeviceDataPrv->InpPtrM)++ = I2C_PDD_ReadDataReg(I2C0_BASE_PTR); /* Receive character */
if (DeviceDataPrv->InpLenM == 0x00U) { /* Is any char. for reception? */
CI2C1_OnMasterBlockReceived(DeviceDataPrv->UserData); /* Invoke OnMasterBlockReceived event */
}
}
} else {
if ((Status & I2C_PDD_ARBIT_LOST) != 0x00U) { /* Arbitration lost? */
DeviceDataPrv->OutLenM = 0x00U; /* Any character is not for sent */
DeviceDataPrv->InpLenM = 0x00U; /* Any character is not for reception */
DeviceDataPrv->SendStop = LDD_I2C_SEND_STOP; /* Set variable for sending stop condition (for master mode) */
DeviceDataPrv->SerFlag &= (uint8_t)~(MASTER_IN_PROGRES); /* Any character is not for sent or reception*/
I2C_PDD_SetTransmitMode(I2C0_BASE_PTR, I2C_PDD_RX_DIRECTION); /* Switch to Rx mode */
}
}
}
void i2c_interrupt_process (i2c_buf_t *buf) {
/*
* this is the i2c interrupt handler, will be called from a wrapper function,
* processor failexpert recommended using register for status, not sure if
* necessary. assuming device is always in master mode.
*/
uint8_t status = I2C_S_REG(I2C0_BASE_PTR);
uint8_t errormask = 0x00;
// clear interrupt flag
I2C_S_REG(I2C0_BASE_PTR) = (uint_8)(status | ((I2C_S_IICIF_MASK & I2C_S_ARBL_MASK) & I2C_S_REG(I2C0_BASE_PTR)));
if (I2C_PDD_GetMasterMode(I2C0_BASE_PTR) == I2C_PDD_MASTER_MODE) { /* Is device in master mode? */
if (I2C_PDD_GetTransmitMode(I2C0_BASE_PTR) == I2C_PDD_TX_DIRECTION) { /* Is device in Tx mode? */
if ((status & I2C_PDD_RX_ACKNOWLEDGE) != 0x00U){ /* NACK received? */
I2C_PDD_SetMasterMode(I2C0_BASE_PTR, I2C_PDD_SLAVE_MODE); /* Switch device to slave mode (stop signal sent) */
I2C_PDD_SetTransmitMode(I2C0_BASE_PTR, I2C_PDD_RX_DIRECTION); /* Switch to Rx mode */
buf->tx_req = 0x00U; /* No character for sending */
buf->rx_req = 0x00U; /* No character for reception */
buf->flags &= ~(MASTER_IN_PROGRES); /* No character for sending or reception */
buf->flags |= (ADDR_COMPLETE | REP_ADDR_COMPLETE); /* Set the flag */
errormask |= LDD_I2C_MASTER_NACK; /* Set the Master Nack error mask */
}
else {
if ((buf->flags & ADDR_COMPLETE) != 0x00U) { /* If 10-bit addr has been completed */
if (buf->tx_req != 0x00U) { /* Is any char. for transmitting? */
buf->tx_req--; /* Decrease number of chars for the transmit */
I2C_PDD_WriteDataReg(I2C0_BASE_PTR, buf->tx_buf[buf->tx_idx++]); /* Send character */
}
else {
if (buf->rx_req != 0x00U) { /* Is any char. for reception? */
if ((buf->flags & REP_ADDR_COMPLETE) != 0x00U) { /* If repeated start and addr tx has been completed for 10-bit mode ?*/
if (buf->rx_req == 0x01U) { /* If only one char to receive */
I2C_PDD_EnableTransmitAcknowledge(I2C0_BASE_PTR, PDD_DISABLE); /* then transmit ACK disable */
}
else {
I2C_PDD_EnableTransmitAcknowledge(I2C0_BASE_PTR, PDD_ENABLE); /* else transmit ACK enable */
}
I2C_PDD_SetTransmitMode(I2C0_BASE_PTR, I2C_PDD_RX_DIRECTION); /* Switch to Rx mode */
(void)I2C_PDD_ReadDataReg(I2C0_BASE_PTR); /* Dummy read character */
}
else { /* Repeated address has not been completed for 10-bit addressing mode */
I2C_PDD_RepeatStart(I2C0_BASE_PTR); /* Repeat start cycle generated */
I2C_PDD_WriteDataReg(I2C0_BASE_PTR, (uint8_t)(buf->slave_addr_high | 0x01U)); /* Send slave address high byte*/
buf->flags |= REP_ADDR_COMPLETE;
}
}
else {
buf->flags &= ~(MASTER_IN_PROGRES); /* Clear flag "busy" */
if (buf->sendstop == TRUE) {
I2C_PDD_SetMasterMode(I2C0_BASE_PTR, I2C_PDD_SLAVE_MODE); /* Switch device to slave mode (stop signal sent) */
I2C_PDD_SetTransmitMode(I2C0_BASE_PTR, I2C_PDD_RX_DIRECTION); /* Switch to Rx mode */
}
}
}
} else {
I2C_PDD_WriteDataReg(I2C0_BASE_PTR, buf->slave_addr_low); /* Send second part of the 10-bit addres */
buf->flags |= (ADDR_COMPLETE); /* Address complete */
}
}
}
else {
buf->rx_req--; /* Decrease number of chars for the receive */
if (buf->rx_req != 0x00U) { /* Is any char. for reception? */
if (buf->rx_req == 0x01U) {
I2C_PDD_EnableTransmitAcknowledge(I2C0_BASE_PTR, PDD_DISABLE); /* Transmit NACK */
}
} else {
buf->flags &= ~(MASTER_IN_PROGRES); /* Clear flag "busy" */
I2C_PDD_SetMasterMode(I2C0_BASE_PTR, I2C_PDD_SLAVE_MODE); /* If no, switch device to slave mode (stop signal sent) */
I2C_PDD_EnableTransmitAcknowledge(I2C0_BASE_PTR, PDD_ENABLE); /* Transmit ACK */
}
buf->rx_buf[buf->rx_idx++] = I2C_PDD_ReadDataReg(I2C0_BASE_PTR); /* Receive character */
}
} else {
if ((status & I2C_PDD_ARBIT_LOST) != 0x00U) { /* Arbitration lost? */
buf->tx_req = 0x00U; /* Any character is not for sent */
buf->rx_req = 0x00U; /* Any character is not for reception */
buf->sendstop = TRUE; /* Set variable for sending stop condition (for master mode) */
buf->flags &= ~(MASTER_IN_PROGRES); /* Any character is not for sent or reception*/
I2C_PDD_SetTransmitMode(I2C0_BASE_PTR, I2C_PDD_RX_DIRECTION); /* Switch to Rx mode */
errormask |= LDD_I2C_ARBIT_LOST; /* Set the ArbitLost error mask */
}
}
if (errormask != 0x00) { /* Is any error mask set? */
buf->errors |= errormask; /* Update list of error mask value */
// maybe do something here to handle error?
}
}